de Jong, Ehlke; Vichi, Marcello; Mehlmann, Carolin Birgitta; Eayrs, Clare; De Kock, Wade; Moldenhauer, Marcel; Audh, Riesna Reuben (2018): Sea Ice conditions within the Antarctic Marginal Ice Zone in winter 2017, onboard the SA Agulhas II [dataset]. University of Cape Town, PANGAEA, https://doi.org/10.1594/PANGAEA.885211
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Abstract:
Our knowledge of sea ice variability, which contributes to the detection of the Antarctic climate change trends, stems primarily from remotely sensed information. However, sea ice in the Southern Ocean is characterized by large variability that remains unresolved and limits our confidence on the remotely sensed products. Therefore, the in situ sea ice observations presented (according to the ASPeCt protocol) provide a greater understanding of the Antarctic sea ice environment - on a local scale - and allows us to evaluate remotely sensed products.
Further details:
Coverage:
Median Latitude: -62.235001 * Median Longitude: 29.865833 * South-bound Latitude: -62.766670 * West-bound Longitude: 29.466670 * North-bound Latitude: -61.600000 * East-bound Longitude: 30.183330
Date/Time Start: 2017-07-04T00:00:00 * Date/Time End: 2017-07-05T00:00:00
Event(s):
AGULII20170704_7 * Latitude: -61.783330 * Longitude: 29.883330 * Date/Time: 2017-07-04T00:00:00 * Location: Southern Ocean * Campaign: AGULII201707 * Basis: S. A. Agulhas II * Method/Device: Ice survey (ICESUR)
AGULII20170704_8 * Latitude: -62.000000 * Longitude: 29.650000 * Date/Time: 2017-07-04T00:00:00 * Location: Southern Ocean * Campaign: AGULII201707 * Basis: S. A. Agulhas II * Method/Device: Ice survey (ICESUR)
AGULII20170704_9 * Latitude: -62.283330 * Longitude: 29.700000 * Date/Time: 2017-07-04T00:00:00 * Location: Southern Ocean * Campaign: AGULII201707 * Basis: S. A. Agulhas II * Method/Device: Ice survey (ICESUR)
Comment:
On 2018-09-11 it was found, that the latitude and longitude were given in the wrong format here. Latitude and longitude are now corrected (now in the correct decimal degree, south and west are negative), and an erratum was added to this dataset (see Further details reference) explaining the change.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
303 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Comment | 5 Station | 6 Date/Time | 7 Ice conc [tenths] (total, Sea ice observation ac...) | 8 Ice conc [tenths] (primary sea ice, Sea ice obse...) | 9 Ice type [code] (primary sea ice, Sea ice obse...) | 10 EsEs [m] (primary sea ice, Sea ice obse...) | 11 Floe size [code] (primary sea ice, Sea ice obse...) | 12 Topography [code] (primary sea ice, Sea ice obse...) | 13 Snow type [code] (primary sea ice, Sea ice obse...) | 14 Snow thick [m] (primary sea ice, Sea ice obse...) | 15 Ice conc [tenths] (secondary sea ice, Sea ice ob...) | 16 Ice type [code] (secondary sea ice, Sea ice ob...) | 17 EsEs [m] (secondary sea ice, Sea ice ob...) | 18 Floe size [code] (secondary sea ice, Sea ice ob...) | 19 Snow type [code] (secondary sea ice, Sea ice ob...) | 20 Snow thick [m] (secondary sea ice, Sea ice ob...) | 21 Ice conc [tenths] (tertiary sea ice, Sea ice obs...) | 22 Ice type [code] (tertiary sea ice, Sea ice obs...) | 23 EsEs [m] (secondary sea ice, Sea ice ob...) | 24 Floe size [code] (tertiary sea ice, Sea ice obs...) | 25 Snow type [code] (tertiary sea ice, Sea ice obs...) | 26 Snow thick [m] (tertiary sea ice, Sea ice obs...) | 27 Clouds [okta] (Meteorological observation ac...) | 28 Visibility [code] (Meteorological observation ac...) | 29 Weather [code] (Meteorological observation ac...) | 30 Comment | 31 Name (of observer) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AGULII20170704_7 | -61.7833 | 29.8833 | 7 | 2017-07-04 | 20 | 20 | 30 | 100 | 0 | 0 | 91 | 26 | no topography (saturated); dark (no cloud measurement) | Clare Eayrs; Marcel Moldenhauer | ||||||||||||||||
| AGULII20170704_8 | -62.0000 | 29.6500 | 8 | 2017-07-04 | 80 | 60 | 90 | 300 | 0 | 20 | 30 | 100 | 5 | 0 | 91 | 83 | no topography (saturated); dark (no cloud measurement). At 8.20, < 10% sic on port side and approx. 80% on starboard side. | Clare Eayrs; Marcel Moldenhauer | ||||||||||||
| AGULII20170704_9 | -62.2833 | 29.7000 | 9 | 2017-07-04 | 90 | 80 | 30 | 100 | 200 | 5 | 10 | 11 | 300 | 0 | 8 | 93 | 28 | 10 percent slushy ice (no topography). Pancakes are getting larger and thicker and are covered with powder snow. | Carolin Mehlmenn; Clare Eayrs | |||||||||||
| AGULII20170704_10 | -62.5667 | 29.7333 | 10 | 2017-07-04 | 90 | 80 | 30 | 100 | 200 | 2 | 10 | 10 | 0 | 7 | 94 | 1 | frazile ice inbetween pan cakes | Carolin Mehlmenn; Clare Eayrs | ||||||||||||
| AGULII20170704_11 | -62.7667 | 29.8000 | 11 | 2017-07-04 | 90 | 90 | 30 | 0.20 | 100 | 300 | 5 | 0.03 | 7 | 97 | 38 | Now we are using cemened panckes (300) instead of rafted pancake (200)- but they look exactly the same (From the 9am shift) | ||||||||||||||
| AGULII20170704_12 | -62.7667 | 29.8500 | 12 | 2017-07-04 | 90 | 50 | 30 | 0.30 | 100 | 300 | 5 | 0.03 | 30 | 90 | 0.10 | 300 | 0 | 0.03 | 10 | 12 | 0.00 | 200 | 0 | 0 | 6 | 97 | 1 | |||
| AGULII20170704_13 | -62.6000 | 29.8833 | 13 | 2017-07-04 | 100 | 90 | 30 | 0.40 | 100 | 300 | 2 | 0.10 | 10 | 90 | 0.20 | 300 | 5 | 0.03 | 8 | 93 | 3 | We have just stopped at recording this log. Because Ice coring operations have begun so the ship is stationary. | Clare. Marcel and Carolin | |||||||
| AGULII20170704_14 | -62.5167 | 29.8500 | 14 | 2017-07-04 | 100 | 90 | 30 | 0.40 | 100 | 300 | 2 | 0.10 | 10 | 90 | 0.20 | 300 | 5 | 0.03 | 8 | 94 | 3 | After the stop, we moved a little bit, stopped again and are just starting to move. | Carolin, Marcel | |||||||
| AGULII20170704_15 | -62.5167 | 29.8500 | 15 | 2017-07-04 | 90 | 60 | 30 | 0.30 | 100 | 300 | 2 | 0.05 | 30 | 90 | 0.10 | 300 | 5 | 0.01 | 7 | 95 | 1 | We started ice operations at approximately 15h30. | Carolin, Marcel | |||||||
| AGULII20170704_16 | -62.5167 | 29.8500 | 16 | 2017-07-04 | Ice operations are still taking place. Therefore the ship is stationary, therefore no ice observations during this hour. | |||||||||||||||||||||||||
| AGULII20170704_17 | -62.5167 | 29.8500 | 17 | 2017-07-04 | Ice operations are still taking place. Therefore the ship is stationary, therefore no ice observations during this hour. | Marcel | ||||||||||||||||||||||||
| AGULII20170704_18 | -62.5167 | 29.8500 | 18 | 2017-07-04 | Ice operations are still taking place. Therefore the ship is stationary, therefore no ice observations during this hour. | Marcel | ||||||||||||||||||||||||
| AGULII20170704_19 | -62.1667 | 29.4667 | 19 | 2017-07-04 | 90 | 60 | 30 | 0.30 | 100 | 300 | 2 | 0.05 | 20 | 90 | 0.10 | 300 | 5 | 0.01 | 20 | 11 | 0.03 | 0 | 0 | 8 | 91 | 0 | Ice observations have officially begun. Moving northward, toward the ice edge and back home to warmer Cape Town. | Ehlke | ||
| AGULII20170704_20 | -62.0167 | 29.7000 | 20 | 2017-07-04 | 100 | 60 | 90 | 0.02 | 300 | 5 | 0.03 | 40 | 30 | 0.20 | 100 | 5 | 0.02 | 91 | no cloud because it was too dark; weather is hard to say (no rain/snow). | Marcel and Clare | ||||||||||
| AGULII20170704_21 | -61.9333 | 30.0667 | 21 | 2017-07-04 | 10 | 10 | 90 | 0.01 | 300 | 0 | 0.00 | 91 | 71 | no cloud (dark); very windy (45 knots) and big swell | Clare and Carolin | |||||||||||||||
| AGULII20170704_22 | -61.9500 | 30.1000 | 22 | 2017-07-04 | 10 | 10 | 90 | 0.01 | 300 | 0 | 0.00 | 90 | 72 | no cloud (drak); very windy(32 knots) and smalle big swell | ||||||||||||||||
| AGULII20170704_23 | -61.9667 | 30.1833 | 23 | 2017-07-04 | 20 | 10 | 30 | 0.10 | 100 | 300 | 0 | 0.00 | 10 | 90 | 0.02 | 300 | 0 | 0.00 | 90 | 39 | ship has stopped for pancake lifting and ctd, pancakes are less cemented than before | Riesna | ||||||||
| AGULII20170705_0 | -62.0000 | 30.0500 | 0 | 2017-07-05 | 40 | 30 | 30 | 0.20 | 100 | 0 | 0.00 | 10 | 90 | 0.10 | 300 | 0 | 0.00 | 0 | 11 | 0.05 | 0 | 0 | 90 | Ship still stationary for pancake lifting & ctd, pancake sic environment low with very large swells. SIC recorded for interest of the ctd & pancake researches working in this environment. no cloud - too dark; weather hard to say (no rain/snow). | Ehlke | |||||
| AGULII20170705_3 | -61.7167 | 30.0500 | 3 | 2017-07-05 | 30 | 20 | 30 | 0.15 | 100 | 0 | 0.00 | 10 | 90 | 0.10 | 300 | 0 | 0.00 | 0 | 11 | 0.05 | 0 | 0 | 91 | 39 | Going through a snow storm with > 45K wind and large swells. CTD and pancake operations are complete. Ice observtions now continue as the ship sails. I'm not certain about the cloud cover (dark). | Ehlke de Jong | ||||
| AGULII20170705_4 | -61.6000 | 29.9500 | 4 | 2017-07-05 | 10 | 10 | 90 | 0.10 | 300 | 0 | 0.00 | 0 | 39 | Going through bands of brash ice. - Busy exiting the ice zone. Wind speed is 50 K. Weather conditions are too harsh (dangerous) to go out and change cameras. | Ehlke de Jong |