Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition
Gabarró, Carolina; Fabregat, Pau; Hernández-Macià, Ferran; Martínez, Justino; Jove, Roger; Salvador, Joaquin; Spreen, Gunnar; Thielke, Linda; von Albedyll, Luisa
Gabarró, Carolina; Fabregat, Pau; Hernández-Macià, Ferran; Martínez, Justino; Jove, Roger; Salvador, Joaquin; Spreen, Gunnar; Thielke, Linda; von Albedyll, Luisa (2022): Brightness temperature measured by ARIEL radiometer at 1.4GHz from July to September 2020 during the MOSAiC expedition [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.943755

ELEVATION START: -2111.0 m
ELEVATION END: -2126.3 m
O2A Registry URI https://registry.o2a-data.de/items/5004
LOCATION: Arctic Ocean
CAMPAIGN: PS122/4 (MOSAiC20192020)
BASIS: Polarstern
METHOD/DEVICE: L-Band Microwave Radiometer (L-MRA)
COMMENT: "second half with transect group (GEM, Magna Probe); Calibration in Log Area"

Start of Event: PS122/4_47-4
ELEVATION START: -2111.0 m
O2A Registry URI https://registry.o2a-data.de/items/5004
LOCATION: Arctic Ocean
CAMPAIGN: PS122/4 (MOSAiC20192020)
BASIS: Polarstern
METHOD/DEVICE: L-Band Microwave Radiometer (L-MRA)
COMMENT: "second half with transect group (GEM, Magna Probe); Calibration in Log Area"

End of Event: PS122/4_47-4
ELEVATION END: -2126.3 m
O2A Registry URI https://registry.o2a-data.de/items/5004
LOCATION: Arctic Ocean
CAMPAIGN: PS122/4 (MOSAiC20192020)
BASIS: Polarstern
METHOD/DEVICE: L-Band Microwave Radiometer (L-MRA)
COMMENT: "second half with transect group (GEM, Magna Probe); Calibration in Log Area"

ELEVATION START: -3130.9 m
ELEVATION END: -3135.8 m

Start of Event: PS122/4_47-147

COMMENT: stationary at remote sensing site

Start of Event: PS122/4_47-148
COMMENT: stationary at remote sensing site

End of Event: PS122/4_48-36

COMMENT: point measurements in log area

COMMENT: point measuements in LogArea, GEM File: PS122_48-171

ELEVATION: -4322.6 m
COMMENT: Calibration on deck. 085151.log (cooling down measurement) 092342.log (warm calibration, temperature 6°C, 3 minutes) 092657.log (sky calibration, 3 minutes)

ELEVATION: -4319.5 m
COMMENT: Measurement at remote sensing site.; New measurement with view to the melt pond after battery exchange and warm up. Same position as the day before. File: _085849.log Wet melt pond surface. Melt pond ice thickness 1.5 cm End: 11:48 UTC on Aug 23

ELEVATION: -4320.2 m
COMMENT: Measurement at the remote sensing site; after battery exchange and warm up: measurement with view to remote sensing site (not change since last measurements) File: _134655.log snow cover, slightly frozen top layer, under the instrument melt water drops in the snow snow (+scattering layer) thickness: 5 cm End: 25.08.2020 06:29 UTC

COMMENT: Measuring at remote sensing site.; Measurement over frozen melt pond (ice thickness about 3 cm). Since 07:09 UTC snow on melt pond under the instrument due to helicopter downwash. File: _063632.log End 9:41 UTC on Aug 25

COMMENT: Measurement at lead event; Observing thin ice and open water in Lead (formed on Aug 24). Thin ice thickness about 1.2 cm. File: _094730.log End: 01:15 UTC on Aug 26

COMMENT: Measurement at lead event; Start warm up at 05:10 UTC Footprint with scattered ice pieces rafted, some open water; ice thickness 2 cm File: _052759.log End: 22:42 UTC

COMMENT: Measurement at lead event ; File: _093250.log Calibration into box from 9:32 to 9:40 UTC In advance warm up and constant blue light blinking. Target temperature: +5°C Sky calibration from 9:40 to 9:45 UTC.

COMMENT: Measurement at Lead event; File: _050907.log Field of view with quite some open water and scattered, rafted thin ice. End: 23:52 UTC

COMMENT: Measurement at Lead event; File: _081856.log Field of view: mainly open water, some thin rafted ice at the lower edge. End: 01:06 UTC on Aug 30

COMMENT: Transect in CO; Transect from 09:05 to 09:49 UTC File: _090541.log In total 10 stops for 2-3 minutes for constant measurements at the position. Field of view analysed with the NIR box for surface properties.

COMMENT: Calibration after transect/before lead measurement; File: _101603.log Warm target/absorber from 10:16 to 10:20 UTC. Absorber temperature 5°C. Sky calibration from 10:21 to 10:36 UTC.

COMMENT: Lead event measurement; File: _104711.log First at with rafted thin ice at the lower edge. Moved (3 m to the left with view to the lead)at 11:12 UTC to total open water view field for more homogeneous measurements. End: 01:58 UTC on Aug 31

COMMENT: Measurement at remote sensing site; View to remote sensing site; File: _115108.log Snow fall in the afternoon and evening. End: 03:43 UTC on Aug 24 (when battery was empty)

COMMENT: Measurement at remote sensing site; File: _112939.log (looking at remote sensing site) ice thickness 138 cm, no snow, scattering layer 4 cm incidence angle 41.3°; End: 13:48 UTC on Aug 22

COMMENT: Measurement on melt pond at remote sensing site; File: _135008.log; View to melt pond at the remote sensing site. Melt pond ice thickness 1 cm with melt water on top. End at 01:38 UTC on Aug 23 (when battery was empty).

COMMENT: Measurement at lead event ; Start recording at 09:47 UTC File: _094701.log End: 03:52 UTC on Aug 28

COMMENT: Measurement at Lead event; File: _100741.log Measuring at lead site covered partly with thin ice, thickness 0.5 to 1.0 cm and open water and some rafted ice. End at 10:57 UTC on Aug 31

COMMENT: Transect in CO; File: _110732.log Same transect as last time with same 10 station points. In general, frozen surface scattering layer. End at 11:57 UTC on Aug 31

COMMENT: Calibration measurements; File:_120845.log Absorber/warm target from 12:08 to 12:14 UTC. Absorber temperature at 5°C. Sky calibration from 12:15 to 12:18 UTC. End at 12:18 UTC.

COMMENT: Measurement at lead event; File: _122557.log Mainly thin ice with 0.5 to 1.0 cm thickness; some open water and thicker ice. End: 04:26 UTC

COMMENT: Measurement at Lead event; File: _051617.log Lead has closed a little bit. FOV mix of thicker ice and thin ice. End: 04:13 UTC on Sep 3

COMMENT: Transect in CO; File: _043630.log Transect in Co with 10 different station, stopping of 3 minutes at each station. Extra surface properties analysis by snow team at each station. Melt pond ice thickness about 1.5 cm. End at 05:18 UTC Aug 03

COMMENT: Measurement at Lead; File: _055510.log New position close by on thin ice without the thicker ice in the field of view. End: 04:40 UTC on Sep 4

COMMENT: Measurement at Lead event; File:_101244.log Follow up measurement at new Lead position with only thin ice. Ice thickness: 3 +/- 0.3 cm. End at 10:41 UTC on Sep 5

COMMENT: Calibration; File: _105418.log Absorber from 10:53 to 11:05 UTC, temperature: 4°C Sky from 11:06 to 11:20 UTC

COMMENT: Measurement to melt pond at remote sensing site; File: _112502.log Measurement of snow covered frozen melt pond. Ice thickness: 2.8 +/- 0.3 cm Snow thickness: 2.7 cm End: 11:03 UTC on Sep 06

COMMENT: Calibration; File: _053207.log; Calibration with absorber from 05:31 to 05:35 UTC, absorber temperature: 5°C; Sky calibration from 05:36 to 05:39 UTC

COMMENT: Transect at KuKa-Transect; File: _104416.log 3 lines along the plan of the KuKa transect line (next to Ballon Town). L1 from 10:44 to 10:48 UTC L2 from 10:50 to 10:52 UTC L3 from 10:54 to 10:57 UTC

COMMENT: Transect in CO; File: _111409.log From 11:14 to 11:58 UTC. Usual transect line in CO with 10 positions. Surface with new snow cover.

COMMENT: Measurement at melt pond; File:_120606.log Measurement of frozen, snow covered melt pond at remote sensing site. End: 05:50 UTC on Sep 8

COMMENT: Measurement at melt pond; File:_055559.log Measurement at frozen, snow covered melt pond at remote sensing site. Snow accumulation of up to 10 cm at the lower, otherwise 2 +/- 0.3 cm snow thickness. End: 03:34 UTC Sep 8

COMMENT: Calibration; File: _084830.log Absorber calibration from 08:48 to 08:59 UTC, temperature: 0°C Sky calibration from 09:00 to 09:04 UTC

COMMENT: Measurement at lead near RS site; Different position than before (got ridged, this position has level thin ice) File: _090522.log Ice thickness: 7 cm; Snow+slush: 5 cm; snow accumulation at the lower edge, max 10 cm, decreasing Pond: Sal=28 PSU, T=-1.7°C End: 04:20 UTC on Sep 10

COMMENT: Transect in CO; File: _043635.log Transect with 10 position, 3 minutes station (see extra file in MCS). End: 05:17 UTC

COMMENT: Calibration; File: _052504.log Absorber from 05:25 to 05:29 UTC, T=-1°C Sky calibration from 05:30 to 05:34 UTC.

COMMENT: Radar transect lines; File: _060410.log Transect along the KuKa-Transect (BT/OC). L1: 06:04:00 - 06:05:30 UTC L2: 06:08:00 - 06:12:00 UTC L3: 06:17:00 - 06:19:30 UTC * end of original line by ridged ice * 06:09:45: view on top of ridged ice

COMMENT: Measurement at lead; File: _062800.log Measurement at lead next to RS site. End: 10:10 UTC

COMMENT: Measurement at melt pond; File: _101334.log Measurement at melt pond at remote sensing site. Ice thickness: 10 cm; snow thickness: 6.8 cm; 1 cm freeboard; 2cm slush End: 11:22 on Sep 10

COMMENT: Measurement at lead; File: _112355.log Measurement at lead next to remote sensing site (same spot then before). Ice thickness: 8 cm; (in FOV no snow/slush) Lead water: Sal=27.9 PSU; T=-1.9°C. End: 22:22 on Sep 10

COMMENT: Measurement at lead; File: _093252.log Measurement at lead close to RS (same position). In field of view some smaller topography change in the ice, no snow, some surface hoar on top of the ice. Ice thickness 14 cm, freeboard: 4 cm; Lead water salinity: 26.7 PSU, T=-1.6°C. End: 04:45 on Sep 13

COMMENT: Transect in CO; File: _101909.log 10 Stations from 10:19:30 to 11:09:45 UTC. Further information see extra file.

COMMENT: Measurement at Lead; File: _112145.log Measurement at same position at lead. Partly water on ice after melting and rain. End: 04:10 UTC on Sep 15

COMMENT: Measurement at remote sensing site; File: _041556.log Measurement to the same field of view as ELBARA, next to it. End: 08:32 UTC on Sep 15

COMMENT: Measurement at Lead; File: _083524.log Measurement at same position at lead as before. End: 03:13 UTC on Sep 16

COMMENT: Measurement at Lead; File: _041710.log Measurement at lead near RS site (same position as before). End: 00:40 UTC on Sep 17

COMMENT: Transect in CO; File: _043034.log, first 4 stations File: _051623.log, rest of stations (new warm up) Off in between, because of a polar bear break. Stop at stations for 3 minutes each (more detailed information in an extra file). End: 05:41

COMMENT: Measurement at Lead; File: _060817.log Measurement at same lead position as before. End: 08:13 UTC

COMMENT: Measurement at lead; File: _095010.log At lead remote sensing site (same position as before); Ice thickness: 20 cm; Freeboard: 0 cm; Slush: 1 cm; Sal_water: 23 PSU; T_water: -2.1°C End: 00:56 on Sep 18

COMMENT: Measurement at Lead; File: _050516.log At same position as before. End: 21:44 on Sep 18

COMMENT: Measurement at Lead; File: _055201.log At same position as before. End: 08:45 UTC on Sep 19

COMMENT: Calibration; File: _085133.log Absorber from 08:51 to 08:56 UTC, T=-2°C Sky from 08:57 to 09:07 UTC

COMMENT: Measurement at Lead; File: _091057.log At same position as before. Ice thickness: 22 cm; freeboard: 0 cm; Slush: 1 cm (a little bit wet); Sal_water: 23 PSU; T_water: -1.3°C; End: 02:30 UTC on Sep 20

COMMENT: Calibration; File: _110828.log; Absorber from 11:08:30 to 11:12:30 UTC, T=4°C; Sky from 11:13:00 to 11:17:00 UTC

COMMENT: Calibration; File: _055134.log; Absorber from 05:51:34 to 05:57:00 UTC, T=0°C; Sky from 05:57:50 to 06:01:50 UTC;

COMMENT: Transect during ice station; File: _064237.log Transect with ice floe and thin ice section. Stations very 25 to 50 m. Station times and pictures: see extra files. Measurements parallel to the IR-Camera as well as surface temperature, snow characteristics, snow thickness and ice thickness measurements. Also the Flux sled stopped at the same transect positions. End: tbd; End of transect. Back at the ship.; File: _114248.log Absorber from 11:42 to 11:48 UTC; T: 23°C (start); 19°C (end). Sky from 11:49 to 11:52 UTC

COMMENT: Transect during ice station; File:_063053.log Transect over ice station flow with different positions where we stopped for several minutes. The last position was at a lead. Parallel measurements with the IR-Camera as well as surface temperature measurements. Ice and snow thickness transect covered our transect; partly covered by flux sled and snow properties.; End of transect..; File: _103252.log Absorber calibration from 10:32 UTC; T=0°C. Sky from 10:36 UTC. End of measurement: 10:41 UTC

COMMENT: Transect during 3rd ice station; Transect from ship to 4 o'clock. End of transect with lead/thin ice investigation. in total 12 stops. More information see in the extra file in the MCS. Additional measurement from snow team, transect group and the flux sled. ; End of transect back at the ship.; Absorber calibration form 12:37 to 12:41 UTC, T=0°C. Sky calibration from 12:42 to 12:44 UTC.