Citation:

PANGAEA.889250

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Abstract:

Manual measurements of sea ice thickness, sub-ice platelet layer thickness, freeboard, and snow thickness are distributed evenly and repeated along a 25km-long transect across Atka Bay every 2 to 4 weeks. At each measurement location, 5 holes were drilled through the ice in order to determine the aforementioned parameters, one in the center and one in a distance of five meters in each direction, to cover their small-scale spatial variabilities.

The measurements have been mainly conducted by the meteorologist (Hauke Schulz) and Max Merl, both of the overwintering team.

Project(s):

Antarctic Fast Ice Network (AFIN)

Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas (SPP1158)

Sea Ice Physics @ AWI (AWI_SeaIce)

Funding:

German Research Foundation (DFG), grant/award no. 5472008 : Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas

Coverage:

Median Latitude: -70.601403 * Median Longitude: -7.931567 * South-bound Latitude: -70.615500 * West-bound Longitude: -8.140978 * North-bound Latitude: -70.574750 * East-bound Longitude: -7.484250

Date/Time Start: 2017-05-08T13:54:00 * Date/Time End: 2017-12-24T13:45:00

Event(s):

Atka_Ice_Port * Latitude: -70.610000 * Longitude: -8.140000 * Location: Atka Bay * Campaign: * Basis: NEUMAYER III * Method/Device: Observation (OBSE)

Comment:

On 2019-11-19 it was noted, that Freeboard and Snow thickness were interchanged. What was called Snow thickness actually was Freeboard and vice versa. This is corrected now.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DATE/TIME	Date/Time		Arndt, Stefanie		Geocode – start, UTC
2	LATITUDE	Latitude		Arndt, Stefanie		Geocode
3	LONGITUDE	Longitude		Arndt, Stefanie		Geocode
4	Sample code/label	Sample label		Arndt, Stefanie
5	Air temperature at 2 m height	T2	°C	Arndt, Stefanie	Digital thermometer
6	Temperature, air	TTT	°C	Arndt, Stefanie	Digital thermometer	surface
7	Temperature, ice/snow	t	°C	Arndt, Stefanie	Digital thermometer	Snow surface
8	Temperature, ice/snow	t	°C	Arndt, Stefanie	Digital thermometer	Snow-ice interface
9	Temperature, water	Temp	°C	Arndt, Stefanie	Digital thermometer
10	Sea ice thickness	EsEs	m	Arndt, Stefanie	Ruler stick (RULER)	Center
11	Sub-ice platelet-layer thickness	SIPL	m	Arndt, Stefanie	Ruler stick (RULER)	Center
12	Snow thickness	Snow thick	m	Arndt, Stefanie	Ruler stick (RULER)	Center
13	Freeboard	Freeboard	m	Arndt, Stefanie	Ruler stick (RULER)	Center
14	Comment	Comment		Arndt, Stefanie	Ruler stick (RULER)	Center
15	Sea ice thickness	EsEs	m	Arndt, Stefanie	Ruler stick (RULER)	North
16	Sub-ice platelet-layer thickness	SIPL	m	Arndt, Stefanie	Ruler stick (RULER)	North
17	Snow thickness	Snow thick	m	Arndt, Stefanie	Ruler stick (RULER)	North
18	Freeboard	Freeboard	m	Arndt, Stefanie	Ruler stick (RULER)	North
19	Comment	Comment		Arndt, Stefanie	Ruler stick (RULER)	North
20	Sea ice thickness	EsEs	m	Arndt, Stefanie	Ruler stick (RULER)	East
21	Sub-ice platelet-layer thickness	SIPL	m	Arndt, Stefanie	Ruler stick (RULER)	East
22	Snow thickness	Snow thick	m	Arndt, Stefanie	Ruler stick (RULER)	East
23	Freeboard	Freeboard	m	Arndt, Stefanie	Ruler stick (RULER)	East
24	Comment	Comment		Arndt, Stefanie	Ruler stick (RULER)	East
25	Sea ice thickness	EsEs	m	Arndt, Stefanie	Ruler stick (RULER)	South
26	Sub-ice platelet-layer thickness	SIPL	m	Arndt, Stefanie	Ruler stick (RULER)	South
27	Snow thickness	Snow thick	m	Arndt, Stefanie	Ruler stick (RULER)	South
28	Freeboard	Freeboard	m	Arndt, Stefanie	Ruler stick (RULER)	South
29	Comment	Comment		Arndt, Stefanie	Ruler stick (RULER)	South
30	Sea ice thickness	EsEs	m	Arndt, Stefanie	Ruler stick (RULER)	West
31	Sub-ice platelet-layer thickness	SIPL	m	Arndt, Stefanie	Ruler stick (RULER)	West
32	Snow thickness	Snow thick	m	Arndt, Stefanie	Ruler stick (RULER)	West
33	Freeboard	Freeboard	m	Arndt, Stefanie	Ruler stick (RULER)	West
34	Comment	Comment		Arndt, Stefanie	Ruler stick (RULER)	West
35	Comment	Comment		Arndt, Stefanie		general
36	Comment 2 (continued)	Comm 2		Arndt, Stefanie		general

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

1703 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Date/Time (start, UTC)	2 Latitude	3 Longitude	4 Sample label	5 T2 [°C] (Digital thermometer)	6 TTT [°C] (surface, Digital thermometer)	7 t [°C] (Snow surface, Digital thermom...)	8 t [°C] (Snow-ice interface, Digital t...)	9 Temp [°C] (Digital thermometer)	10 EsEs [m] (Center, Ruler stick)	11 SIPL [m] (Center, Ruler stick)	12 Snow thick [m] (Center, Ruler stick)	13 Freeboard [m] (Center, Ruler stick)	14 Comment (Center, Ruler stick)	15 EsEs [m] (North, Ruler stick)	16 SIPL [m] (North, Ruler stick)	17 Snow thick [m] (North, Ruler stick)	18 Freeboard [m] (North, Ruler stick)	19 Comment (North, Ruler stick)	20 EsEs [m] (East, Ruler stick)	21 SIPL [m] (East, Ruler stick)	22 Snow thick [m] (East, Ruler stick)	23 Freeboard [m] (East, Ruler stick)	24 Comment (East, Ruler stick)	25 EsEs [m] (South, Ruler stick)	26 SIPL [m] (South, Ruler stick)	27 Snow thick [m] (South, Ruler stick)	28 Freeboard [m] (South, Ruler stick)	29 Comment (South, Ruler stick)	30 EsEs [m] (West, Ruler stick)	31 SIPL [m] (West, Ruler stick)	32 Snow thick [m] (West, Ruler stick)	33 Freeboard [m] (West, Ruler stick)	34 Comment (West, Ruler stick)	35 Comment (general)	36 Comm 2 (general)
2017-05-08T13:54	-70.609159	-8.140978	Shelf100	-32.0	-34.0	-14.2	-3.0	-2.1	3.06		1.08	0.05	T_snow in 50cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-08T14:39	-70.609619	-8.138613	Shelf200	-31.9	-32.2	-13.9	-3.6	-2.0	0.55	0.19	0.45	-0.17	T_snow in 15cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-08T14:58	-70.610056	-8.136275	Shelf300	-32.3	-33.9	-19.8	-6.0	-2.0	0.76		0.37	-0.05	T_snow in 15cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-08T15:22	-70.610531	-8.133960	Shelf400	-32.3	-33.8	-22.1	-7.0	-2.0	0.68		0.31	-0.06	T_snow in 15cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-08T15:44	-70.611011	-8.131651	Shelf500	-31.3	-30.8	-16.8	-15.1	-2.0	0.70	0.09	0.14	0.04	T_snow in 15cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-08T16:10	-70.613507	-8.120407	Shelf1000	-30.6	-31.2	-15.8	-10.5	-2.0	0.61		0.20	-0.02	T_snow in 15cm																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers.	Thermometers could hardly be read at the prevailing temperatures or the device failed completely at times. Temperature values are therefore not reliable.
2017-05-12T16:35	-70.609619	-8.138613	Shelf200	-11.6	-15.5	-6.3	-4.4	-2.0	0.70	0.36	0.23	-0.03	slush-ice at snow/ice interface																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers. Sometimes long cracks can be seen in the sea ice. Snow temperatures were measured in the middle of the snow.
2017-05-12T16:25	-70.610056	-8.136275	Shelf300	-11.7	-15.0	-7.7	-5.0	-2.0	0.64	0.33	0.35	-0.02	slush-ice at snow/ice interface																					Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers. Sometimes long cracks can be seen in the sea ice. Snow temperatures were measured in the middle of the snow.
2017-05-12T16:13	-70.610531	-8.133960	Shelf400	-11.6	-14.4	-8.6	-6.1	-2.0	0.56	0.33	0.28	-0.03																						Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers. Sometimes long cracks can be seen in the sea ice. Snow temperatures were measured in the middle of the snow.
2017-05-12T16:05	-70.611011	-8.131651	Shelf500	-11.6	-16.2	-10.6	-9.2	-2.1	0.70	0.23	0.15	0.06																						Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers. Sometimes long cracks can be seen in the sea ice. Snow temperatures were measured in the middle of the snow.
2017-05-12T15:50	-70.613507	-8.120407	Shelf1000	-10.5	-16.5	-9.4	-8.0	-2.0	0.62	0.05	0.17	0.00																						Sea ice was very flat. At the 5th drilling there were some snowdrifts/raises. Surface temperatures of the snow were measured with IR thermometers. Sometimes long cracks can be seen in the sea ice. Snow temperatures were measured in the middle of the snow.
2017-05-18T15:25	-70.574750	-8.045700	Atka03	-21.1	-13.2	-14.0	-8.0	-2.0	1.80	0.62	0.32	0.05		1.04	0.42	0.25	0.01		1.62	0.39	0.26	0.02	double ice layer at 1.20m			0.46		not enough corer extensions	2.98	1.06	0.30	0.00	bore hole quite fast refrozen, therefore freeboard value not reliable	The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T13:20	-70.582450	-7.944417	Atka07	-21.5	-18.4	-13.8	-8.7	-2.0	0.73	0.10	0.38	-0.03	strikingly clear water	0.69	0.11	0.22	-0.02	clear water	0.71	0.10	0.28	-0.05	clear water	0.89	0.12	0.21	-0.06	slush-ice at snow/ice interface (before drilling), clear water	0.81	0.63	0.33	-0.02	clear water	The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T18:03	-70.609159	-8.140978	Shelf100	-25.1	-25.7	-10.5	-3.7	-2.0	3.83	0.60	1.03		freeboard quite positiv																					The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T17:52	-70.609619	-8.138613	Shelf200	-25.6	-25.9	-13.0	-6.2	-2.0	0.73	0.63	0.20	0.01																						The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T17:32	-70.610056	-8.136275	Shelf300	-24.4	-25.6	-14.3	-7.0	-2.0	0.61	0.49	0.34	-0.04																						The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T17:13	-70.610531	-8.133960	Shelf400	-25.2	-24.7	-14.7	-8.4	-3.0	0.59	0.53	0.29	-0.04																						The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T16:57	-70.611011	-8.131651	Shelf500	-25.3	-25.4	-19.4	-15.8	-2.2	0.77	0.42	0.13	0.06																						The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-18T16:38	-70.613507	-8.120407	Shelf1000	-24.4	-21.5	-14.8	-11.4	-2.0	0.69	0.39	0.19	0.01																						The sea ice was still very even between Shelf100 and Shelf1000, but there were significantly more cracks to be seen. At Atka3 there were some distortions, also on the way to Atka7, distortions and flat surfaces alternated.	Atka7 was rather on an uneven spot. Surface temperatures of the snow were measured with IR thermometers. Conductivities were analyzed from a water sample and refer to a reference temperature of 20°C.
2017-05-30T19:14	-70.574750	-8.045700	ATKA03	-12.3	-14.1	-10.7	-9.1	-2.1	1.06	0.50	0.10	0.05		1.96	1.37	0.35	-0.06		0.94	0.32	0.17	0.05		1.24	0.36	0.46	0.07		1.01	0.37	0.04	0.08		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T16:55	-70.582450	-7.944417	ATKA07	-14.6	-17.2	-9.6	-6.4	-2.0	0.79	0.22	0.66	-0.14	slush	0.77	1.86	0.57	-0.13		0.80	0.17	0.66	-0.16	slush	0.96	0.03	0.70	-0.16	slush	0.80	0.25	0.66	-0.12		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T15:38	-70.591533	-7.824533	ATKA11	-14.7	-16.8	-12.9	-10.4	-2.1	0.76	0.02	0.11	0.04		0.64	0.07	0.16	0.01		0.95	0.06	0.06	0.05		0.73	0.09	0.08	0.04		0.69	0.11	0.15	0.02		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T13:19	-70.599250	-7.701850	ATKA16	-14.4	-15.6	-12.3	-11.9	-2.1	0.64	0.14	0.06	0.04		0.65	0.13	0.05	0.04		0.65	0.18	0.06	0.04		0.64	0.23	0.05	0.04		0.65	0.12	0.05	0.04		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T14:50	-70.607333	-7.578000	ATKA21	-14.6	-16.8	-11.3	-10.5	-2.0	0.82	-0.03	0.10	0.03		0.71	0.08	0.12	0.03		0.71	0.11	0.10	0.04		0.73	0.08	0.10	0.04		0.71	0.09	0.10	0.04		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T14:16	-70.615500	-7.484250	ATKA24	-14.9	-16.6	-11.2	-9.8	-2.1	0.70	0.79	0.11	0.04		0.70	0.06	0.11	0.04		0.70	0.05	0.09	0.04		0.69	0.04	0.10	0.04		0.71	0.05	0.11	0.04		Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-05-30T16:55	-70.582407	-7.944267	Buoys	-14.6	-17.2	-9.6	-6.0	-2.0	0.80	0.17	0.66	-0.16	slush; measurement corresponds to Atka07-East; thermistor chain was let into this hole.																					Conductivities were measured directly in the field. Surface temperatures were measured with IR thermometers.
2017-06-12T16:45	-70.578107	-8.053735	ATKA03						1.02	0.02	0.26	0.01	Please note the changed position! It was moved south to sample thermodynamically grown ice and not to be under the influence of the iceberg in the north.																					Test drive for the EM31 with corresponding test drillings.
2017-06-12T18:00	-70.582450	-7.944417	ATKA07						1.06	0.10	0.72	-0.12																						Test drive for the EM31 with corresponding test drillings.
2017-06-12T19:10	-70.609619	-8.138613	Shelf200						0.80	1.00	0.48	-0.07																						Test drive for the EM31 with corresponding test drillings.
2017-06-18T13:31	-70.582450	-7.944417	ATKA07	-24.4	-25.9	-11.9	-5.8	-2.0	1.11	0.12	0.52	-0.05	no slush	1.09	0.17	0.52	-0.10	slush; water on sea ice already before drilling	1.03	0.20	0.59	-0.12	Slush, water on the ice, piled up ice floe hidden in the snow and near the borehole	1.12	0.11	0.44	-0.07	slush, water on the ice	1.10	0.06	0.55	-0.10	slush, water on the ice, water sample	Conductivity measurements should be taken with caution, as slush ice, which could have influenced the measurements, was usually in the drilling channel during the measurements.
2017-06-18T12:40	-70.591533	-7.824533	ATKA11	-25.4	-27.3	-17.4	-14.5	-2.2	0.80	0.17	0.19	0.05	water sample	0.94	0.01	0.07	0.06		0.85	0.04	0.19	0.03		0.82	0.01	0.11	0.04		0.80	0.09	0.17	0.05		Conductivity measurements should be taken with caution, as slush ice, which could have influenced the measurements, was usually in the drilling channel during the measurements.
2017-06-18T11:56	-70.599250	-7.701850	ATKA16	-24.4	-26.3	-15.9	-13.4	-2.2	0.86	0.30	0.17	0.04		0.88	0.26	0.10	0.05		0.83	0.14	0.20	0.04		0.86	0.12	0.26	0.03		0.85	0.25	0.12	0.04		Conductivity measurements should be taken with caution, as slush ice, which could have influenced the measurements, was usually in the drilling channel during the measurements.
2017-06-18T11:15	-70.607333	-7.578000	ATKA21	-25.1	-26.4	-16.9	-13.9	-2.2	0.89	0.42	0.32	0.03		0.85	0.30	0.18	0.04		0.89	0.32	0.37	0.04		0.88	0.42	0.09	0.04		0.88	0.34	0.11	0.04		Conductivity measurements should be taken with caution, as slush ice, which could have influenced the measurements, was usually in the drilling channel during the measurements.
2017-06-18T10:39	-70.615500	-7.484250	ATKA24	-23.6	-24.9	-17.6	-15.2	-2.2	0.88	0.03	0.10	0.04		0.85	0.16	0.19	0.04		0.86	0.08	0.13	0.04		0.89	0.10	0.09	0.04		0.86	0.04	0.09	0.04		Conductivity measurements should be taken with caution, as slush ice, which could have influenced the measurements, was usually in the drilling channel during the measurements.
2017-06-19T07:13	-70.574750	-8.045700	ATKA03	-19.6	-20.0	-13.8	-11.2	-2.2	1.12	0.20	0.24	0.06		1.02	0.04	0.19	0.05	water sample	1.03	0.14	0.26	0.07	Salinometer was pushed approx. 1m into the drill channel	1.33	0.07	0.29	0.10	bore hole filled up with slush	0.71	0.48	0.21	0.08	Salinometer was pushed approx. 1m into the drill channel	This measurement completes the series of 18.06.2017, which had to be shortened due to technical problems.
2017-07-14T14:00	-70.613507	-8.120407	Shelf1000	-33.4	-32.0	-18.5	-14.4	-2.3	1.23	1.79	0.27	0.08
2017-07-17T11:30	-70.609619	-8.138613	Shelf200	-27.3	-27.5	-15.7	-9.7	-2.2	1.18	2.34	0.67	0.00																						Holes on Shelf200 and Shelf300 were drilled by hand after two drills broke.
2017-07-17T11:02	-70.610056	-8.136275	Shelf300	-26.5	-27.3	-15.4	-10.8	-2.2	1.06	1.55	0.46	0.00	first signs of platelet ice at 251 cm																					Holes on Shelf200 and Shelf300 were drilled by hand after two drills broke.
2017-07-17T10:47	-70.610531	-8.133960	Shelf400	-26.5	-27.2	-16.9	-10.5	-2.1	1.10	1.34	0.45	0.05	first signs of platelet ice at 280 cm																					Holes on Shelf200 and Shelf300 were drilled by hand after two drills broke.
2017-07-17T10:30	-70.611011	-8.131651	Shelf500	-26.2	-29.6	-18.8	-13.5	-2.1	1.30	1.91	0.32	0.03																						Holes on Shelf200 and Shelf300 were drilled by hand after two drills broke.
2017-07-17T10:15	-70.613507	-8.120407	Shelf1000	-25.7	-28.0	-19.5	-14.0	-2.2	1.21	1.75	0.30	0.05	first signs of platelet ice at 570 cm																					Holes on Shelf200 and Shelf300 were drilled by hand after two drills broke.
2017-07-20T15:00	-70.574750	-8.045700	ATKA03	-24.0	-23.1	-18.7	-14.9	-2.1	1.35	0.21	0.26	0.04	first signs of platelet ice at 3.81 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-07-20T13:55	-70.582450	-7.944417	ATKA07	-24.7	-25.5	-15.5	-7.7	-2.1	1.34	0.46	0.84	-0.12	During the platelet ice measurement, no slow transition (increasing resistance) could be noticed at this point, but a hard edge																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-07-20T13:00	-70.591533	-7.824533	ATKA11	-24.1	-24.1	-20.4	-15.0	-2.1	1.07	0.32	0.20	0.07	first signs of platelet ice at 3.35 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-07-20T12:29	-70.599250	-7.701850	ATKA16	-24.2	-24.5	-18.9	-14.8	-2.2	1.15	0.90	0.22	0.04	first signs of platelet ice at 2.82 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-07-20T11:48	-70.607333	-7.578000	ATKA21	-25.3	-25.3	-19.8	-15.5	-2.2	1.17	2.03	0.23	0.07	first signs of platelet ice at 4.45 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-07-20T10:43	-70.615500	-7.484250	ATKA24	-25.2	-29.0	-21.0	-19.8	-2.2	1.20	0.64	0.10	0.07				0.07					0.11					0.08			1.24	0.53	0.09	-0.07		All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers. Due to technical problems, all drilling was done by hand and therefore reduced to one hole per position.
2017-08-08T09:45	-70.609619	-8.138613	Shelf200	-21.4	-29.7	-11.1	-6.8	-2.2	1.20	4.14	1.15	-0.23	first signs of platelet ice at 5.27 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers.
2017-08-08T10:05	-70.610056	-8.136275	Shelf300	-20.5	-28.0	-11.2	-7.1	-2.1	1.10	3.09	0.77	-0.15	first signs of platelet ice at 5.86 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers.
2017-08-08T10:20	-70.610531	-8.133960	Shelf400	-20.6	-24.0	-11.6	-8.0	-2.1	1.18	3.09	0.49	0.00																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers.
2017-08-08T10:38	-70.611011	-8.131651	Shelf500	-20.5	-23.5	-12.2	-8.8	-2.1	1.42	2.70	0.57	-0.05	first signs of platelet ice at 6.90 m																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers.
2017-08-08T10:58	-70.613507	-8.120407	Shelf1000	-20.6	-23.0	-12.3	-9.2	-2.0	1.34	2.56	0.45	0.00	High resistance in the measuring hole due to platelet ice, so that only the striking platelet ice boundary could be measured																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured with IR thermometers.
2017-08-17T17:40	-70.574750	-8.045700	ATKA03	-37.1	-37.0	-19.5	-11.5	-2.1	1.47	1.96	0.51	0.01		1.45	1.77	0.41	0.01		1.39	1.77	0.52	0.00		1.47	2.07	0.60	0.00		1.49	1.80	0.42	0.04		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-08-17T15:30	-70.582450	-7.944417	ATKA07	-31.9	-34.7	-14.3	-7.0	-2.0	1.41	1.95	1.00	-0.11		1.45	1.15	1.20	-0.17		1.31	1.30	1.10	-0.26		1.30	1.00	0.90	-0.17		1.37	1.00	1.20	-0.20		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-08-17T14:35	-70.591533	-7.824533	ATKA11	-33.8	-33.5	-22.1	-16.0	-2.1	1.77	1.06	0.18	0.10		1.41	0.73	0.35	0.05		2.07	1.50	0.20	0.14		1.51	0.94	0.35	0.07		1.74	1.11	0.28	0.10		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-08-17T13:35	-70.599250	-7.701850	ATKA16	-31.6	-33.3	-19.8	-14.2	6.7	1.27	1.00	0.28	0.04		1.36	0.91	0.27	0.02		1.25	0.99	0.37	0.02		1.24	1.15	0.22	0.03		1.29	0.97	0.26	0.01		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-08-17T12:45	-70.607333	-7.578000	ATKA21	-29.9	-34.0	-20.7	-16.3	-2.1	1.37	1.30	0.23	0.12		1.33	1.12	0.22	0.06		1.27	1.60	0.28	0.02		1.35	1.19	0.23	0.03		1.39	1.40	0.23	0.04		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-08-17T11:05	-70.615500	-7.484250	ATKA24	-28.8	-34.7	-19.4	-14.9	-2.1	1.44	0.63	0.22	0.06	first signs of platelet ice at 1.23 m	1.39	0.58	0.25	0.08		1.39	0.68	0.23	0.07		1.40	0.83	0.48	0.07	first signs of platelet ice at 1.77 m	1.40	1.97	0.14	0.06		All conductivities refer to a temperature of 20°C. Surface temperatures were measured at Atka11-Atka24 with the IR thermometer (IR measuring range down to -30°C), otherwise with the insertion thermometer (testo).
2017-09-20T16:05	-70.609619	-8.138613	Shelf200	-30.8	-31.3	-8.7		-2.0	2.14	4.27	1.80	-0.76	70cm slush already before drilling																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer (testo).
2017-09-20T15:35	-70.610056	-8.136275	Shelf300	-30.3	-31.1	-12.3	-6.6	-2.0	1.27	4.76	1.44	-0.21																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer (testo).
2017-09-20T14:53	-70.610531	-8.133960	Shelf400	-29.0	-29.5	-13.4	-7.5	-2.0	1.35	4.37	1.22	-0.18																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer (testo).
2017-09-20T16:40	-70.611011	-8.131651	Shelf500	-30.3	-31.3	-13.2	-8.3	-2.0	2.11	3.99	1.07	-0.13																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer (testo).
2017-09-20T17:05	-70.613507	-8.120407	Shelf1000	-30.7	-31.4	-16.8	-9.6	-2.1	1.51	3.62	0.61	-0.01																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer (testo).
2017-09-21T17:15	-70.574750	-8.045700	ATKA03	-25.8	-25.9	-19.0	-10.1	-2.1	1.63	0.73	0.58	-0.04		1.48	0.82	0.60	-0.07		1.43	0.86	0.70	-0.14		1.55	0.60	0.59	-0.09		1.61	0.63	0.51	-0.05		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-09-21T15:43	-70.582450	-7.944417	ATKA07	-26.6	-27.3	-12.9	-7.4	-2.1	1.59	1.72	2.08	-0.38																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-09-21T14:45	-70.591533	-7.824533	ATKA11	-27.1	-28.0	-22.9	-16.9	-2.1	1.10	3.17	0.30	0.14		1.76	1.73	0.29	0.03		2.17	1.70	0.30	0.17		2.96	1.00	0.39	0.12		1.74	1.83	0.30	0.10		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-09-21T14:10	-70.599250	-7.701850	ATKA16	-27.0	-25.5	-21.3	-17.8	-2.1	1.58	1.30	0.17	0.12		1.58	1.27	0.21	0.02		1.44	1.64	0.26	0.03		1.47	1.38	0.16	0.07		1.54	1.42	0.17	0.04		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-09-21T13:30	-70.607333	-7.578000	ATKA21	-26.4	-27.2	-20.7	-12.8	-2.1	1.57	1.50	0.50	0.00		1.65	1.41	0.44	-0.01		1.47	1.90	0.45	-0.04		1.65	1.62	0.48	0.00		1.64	1.38	0.48	0.00		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-09-21T12:40	-70.615500	-7.484250	ATKA24	-25.4	-32.9	-21.3	-17.3	-2.0	1.61	0.69	0.16	0.11		1.59	0.58	0.30	0.10		1.51	0.72	0.18	0.10		1.60	0.83	0.22	0.12		1.66	1.01	0.15	0.09		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. At Atka07 the snow ablation was very high.	Due to the influence of the iceberg located approx. 800m to the east, an abnormal amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T15:25	-70.574750	-8.045700	ATKA03	-12.4	-8.7	-9.2	-6.0	-2.0	1.74	1.18	1.14	-0.21		1.73	1.18	1.10	-0.20		1.61	1.52	1.14	-0.20		1.62	0.87	1.20	-0.25		1.72	1.45	1.16	-0.20		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T13:00	-70.582450	-7.944417	ATKA07			-8.2	-2.4	-2.1	1.48	3.99	3.30	-1.80	Slush ice with a thickness of 180 cm was also assumed as freeboard, boundary layer temperature snow/ice measured at interface slush/water.																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T12:50	-70.591533	-7.824533	ATKA11	-14.1	-10.6	-14.7	-10.0	-2.0	2.14	3.29	0.50	0.04		1.93	3.06	0.55	0.03		2.27	2.99	0.44	0.06		1.94	2.85	0.44	0.05		1.87	2.86	0.51	0.05		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T12:06	-70.599250	-7.701850	ATKA16	-15.5	-14.0	-12.0	-7.9	-2.0	1.67	2.56	0.50	0.00		1.75	2.62	0.58	0.00		1.63	2.64	0.55	0.00		1.57	2.48	0.50	-0.02		1.71	2.57	0.52	0.00		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T11:25	-70.607333	-7.578000	ATKA21	-15.2	-13.6	-11.0	-6.7	-1.8	1.69	2.33	0.94	-0.16		1.72	2.86	0.99	-0.16		1.70	2.79	0.88	-0.08		1.81	3.14	0.77	-0.10		1.80	2.82	0.95	-0.12		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-25T10:35	-70.615500	-7.484250	ATKA24	-14.8	-13.3	-15.0	-11.3	-2.0	1.94	1.46	0.20	0.09	brown water	1.77	1.46	0.25	0.10	braunes Wasser	1.69	1.66	0.30	0.07	brown water	1.68	1.71	0.47	0.10	brown water	1.81	1.79	0.24	0.09	brown water	All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer. Snow temperatures refer to the middle of the snow pack.	At Atka7 the amount of snow was very high Due to the influence of the iceberg located approx. 800m to the east, an abnormally high amount of snow has been added since the last measurement compared to the surrounding area.
2017-10-27T16:55	-70.609619	-8.138613	Shelf200	-8.8	-8.2	-2.8	-2.8	-2.0	2.42	11.10	1.90	-0.55	Slush: 55 cm, boundary layer temperature snow/ice at the interface snow/slush, hard edge platelet ice at 582 cm, given value at first detection of platelet ice																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-10-27T16:50	-70.610056	-8.136275	Shelf300	-8.7	-8.4	-6.5	-3.7	-2.0	1.46	12.33	2.05	-0.78	Slush: 78 cm, boundary layer temperature snow/ice at the interface snow/slush, hard edge platelet ice at 541 cm, given value at first detection of platelet ice																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-10-27T16:10	-70.610531	-8.133960	Shelf400	-8.9	-7.5	-9.3	-5.8	-2.0	1.95	12.46	1.78	-0.23	Slush: 20 cm, hard edge platelet ice at 549 cm, above value at first detection																					All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-10-27T15:39	-70.611011	-8.131651	Shelf500	-9.1	-8.4	-9.0	-5.8	-2.0	1.93	7.00	1.50	-0.20																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-10-27T15:24	-70.613507	-8.120407	Shelf1000	-8.6	-8.1	-10.3	-6.4	-2.0	1.66	4.48	0.83	-0.03																						All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-11-20T12:34	-70.574750	-8.045700	ATKA03	-6.1	-4.0	-7.1	-4.3	-1.9	1.82	2.23	1.11	-0.17		2.12	1.86	1.17	-0.19		1.61	2.60	1.08	-0.16	first signs of platelet ice at 5.50 m	1.73	2.35	1.10	-0.19		1.82	1.95	1.06	-0.20		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-11-20T14:20	-70.591533	-7.824533	ATKA11	-5.8	-5.5	-8.9	-6.8	-2.0	2.27	5.20	0.62	0.12		1.97	4.40	0.69	0.07		2.56	4.51	0.55	0.08		2.22	4.25	0.57	0.10		1.82	4.05	0.70	0.00		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-11-20T15:10	-70.599250	-7.701850	ATKA16	-5.0	-4.4	-4.9	-6.7	-2.0	1.72	5.32	0.42	0.02		1.81	4.05	0.56	-0.01		1.65	4.30	0.59	-0.02		1.77	4.00	0.46	0.05		1.82	4.00	0.59	0.01		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-11-20T16:10	-70.607333	-7.578000	ATKA21	-5.9	-8.8	-7.5	-5.4	-2.0	1.81	4.05	1.14	-0.16		1.80	4.40	1.15	-0.17		1.76	4.05	1.15	-0.16		1.87	4.45	1.14	-0.15		1.99	3.70	1.10	-0.18		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-11-20T17:05	-70.615500	-7.484250	ATKA24	-6.1	-6.7	-6.3	-7.4	-2.0	1.77	2.35	0.20	0.12	Brown deposit in drilling mud	1.82	2.60	0.34	0.12	Brown deposit in drilling mud	1.72	2.65	0.29	0.10	Brown deposit in drilling mud	1.87	2.55	0.26	0.13	Brown deposit in drilling mud	1.87	2.40	0.20	0.10	Brown deposit in drilling mud	All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-12-24T09:10	-70.574750	-8.045700	ATKA03	-1.5	-0.2	-3.0	-3.3	-1.9	1.99	1.17	1.15	-0.23		1.97	0.95	1.16	-0.35		1.72	1.21	1.29	-0.30		1.77	1.80	1.20	-0.30		1.97	1.22	0.98	-0.25		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-12-24T10:50	-70.591533	-7.824533	ATKA11	-0.4	-0.3	-3.9	-4.1	-1.9	2.39	5.87	0.91	0.00		1.94	5.34	0.80	-0.08		2.12	1.43	0.88	-0.05		2.23	3.15	0.82	-0.04		1.98	2.10	0.99	-0.04		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-12-24T12:00	-70.599250	-7.701850	ATKA16	0.0	0.7	-3.7	-3.7	-1.8	1.76	3.05	0.60	-0.06		1.83	3.00	0.82	-0.04		1.72	3.05	0.63	-0.05		1.93	3.14	0.58	0.00		1.85	2.75	0.68	-0.07		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-12-24T12:45	-70.607333	-7.578000	ATKA21	2.6	0.6	-3.0	-3.1	-1.8	1.89	3.93	1.05	-0.18		1.93	3.62	1.18	-0.22	drilled before snow/ice boundary layer measured --> no temperature of this boundary layer	1.89	3.43	1.10	-0.15		1.92	3.60	1.20	-0.20		1.95	3.36	1.00	-0.16		All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.
2017-12-24T13:45	-70.615500	-7.484250	ATKA24	3.0	-0.5	-3.2	-3.6	-1.8	1.91	2.46	0.33	0.11	brown deposits in drilling mud	1.87	4.37	0.26	0.09	brown deposits in drilling mud	1.80	4.42	0.39	0.09		1.86	2.46	0.45	0.12	brown deposits in drilling mud	1.96	2.41	0.33	0.11	brown deposits in drilling mud	All conductivities refer to a temperature of 20°C. Surface temperatures were measured exclusively with the insertion thermometer.