Citation:

PANGAEA.948828

Name: Transmittance through sea ice from radiation station 2020R11
Published: 2024-02-06
License: https://creativecommons.org/licenses/by/4.0/
Keywords: autonomous platform; buoy; drift; lightchain; snow depth; solar radiation

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Abstract:

Solar radiation over and under sea ice was measured by radiation station 2020R11, an autonomous platform, installed on drifting Second-Year-Ice (SYI) in the Arctic Ocean during MOSAiC (Leg 2) 2019/20. The resulting time series describes radiation measurements as a function of place and time between 26 March 2020 and 01 August 2020 in sample intervals of 3 hours. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 1 m above the sea ice surface. The third sensor was mounted 0.5 m underneath the sea ice measuring the downward transmitted irradiance. Along with the radiation measurements, this autonomous platform consisted of a lightchain, which measured counts of red, green and blue light at 49 positions at hourly intervals. In addition, the evolution of snow height is measured at hourly intervals. All times are given in UTC.

Keyword(s):

autonomous platform; buoy; drift; lightchain; snow depth; solar radiation

Further details:

Buoy Deployment Report 2020R11

Project(s):

Current sea ice maps for Arctic and Antarctic (meereisportal.de)

Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC)

Sea Ice Physics @ AWI (AWI_SeaIce)

Funding:

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AFMOSAiC-1_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS122_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC

Coverage:

Median Latitude: 84.297156 * Median Longitude: 15.216410 * South-bound Latitude: 83.694000 * West-bound Longitude: 12.844700 * North-bound Latitude: 85.839000 * East-bound Longitude: 18.317800

Date/Time Start: 2020-03-27T09:03:50 * Date/Time End: 2020-08-01T09:02:02

Minimum Elevation: -2586.3 m * Maximum Elevation: -2586.3 m

Event(s):

PS122/3_28-55 (2020R11) * Latitude Start: 85.982218 * Longitude Start: 13.088808 * Latitude End: 78.802415 * Longitude End: -2.393845 * Date/Time Start: 2020-03-26T14:55:00 * Date/Time End: 2020-08-01T10:00:00 * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: (MOSAiC20192020) * Basis: * Method/Device: Radiation Station (RAD_S)

PS122/4_43-158 (2020R11) * Latitude: 78.802415 * Longitude: -2.393845 * Date/Time: 2020-08-01T10:00:00 * Elevation: -2586.3 m * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: (MOSAiC20192020) * Basis: * Method/Device: Radiation Station (RAD_S) * Comment: recovery

Comment:

The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, position: The geographic position is flagged +1 if the drift velocity, as derived from the GPS longitude and latitude, exceeds a threshold of 10 deg latitude or 50 deg longitude per time step; +2 if the position exceeds extreme values, such as longitude > 360 deg; +4 if the position is exactly 0.0. Quality flag, sun: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05 .

Parameter(s):

#	Name	Short Name	Principal Investigator	Comment
1	DATE/TIME	Date/Time	Nicolaus, Marcel	Geocode
2	LATITUDE	Latitude	Nicolaus, Marcel	Geocode
3	LONGITUDE	Longitude	Nicolaus, Marcel	Geocode
4	Quality flag, sun elevation	QF sun	Nicolaus, Marcel

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)

Size:

2875 data points

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