Snow height on sea ice, meteorological conditions and drift of sea ice from autonomous measurements from buoy 2020S105, deployed during MOSAiC 2019/20
Current sea ice maps for Arctic and Antarctic, Multidisciplinary drifting Observatory for the Study of Arctic Climate, Sea Ice Physics @ AWI, meereisportal.de, MOSAiC, AWI_SeaIce
Datacenter: Data Publisher for Earth & Environmental ScienceIso topic category: UnknownShow Abstract
Snow height was measured by the Snow Buoy 2020S105, an autonomous platform, installed on drifting sea ice in the Arctic Ocean during MOSAiC (Leg 5) 2019/20. The resulting time series describes the evolution of snow height as a function of place and time between 21 September 2020 and 12 April 2021 in sample intervals of 1 hour. The Snow Buoy consists of four independent acoustic range finder measurements representing the area (approx. 10 m**2) around the buoy. In addition to snow height, geographic position (GPS), barometric pressure, air temperature, and surface temperature were measured. Negative values of snow height occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.936342"! ** 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, snow: The snow height is flagged for each sensor +1 for manual corrections during processing (e.g. sensor issues); +2 if the snow accumulation exceeds 0.1 m per hour; +4 if the difference in snow height is larger than 0.03 m compared to values within the last and next 2 hours; +32 if the value exceeds the height of sensor on the platform at 1.5 m. Quality flag, temperature: The air temperature is flagged +1 for manual corrections during processing (e.g. sensor issues); + 32 if the value is below – 50 °C. Quality flag, pressure: The barometric pressure is flagged +1 for manual corrections during processing (e.g. sensor issues).Show Keywords
Keywords:- 2020S105
- autonomous platform
- buoy
- drift
- PS122/5
- PS122/5_58-167
- Snow buoy
- snow depth
Metadata Information
Metadata identifier: PANGAEA_936342Last metadata update: 2022-03-30T14:00:00ZAlternate identifier:Metadata status: ActiveAccess constraint: unrestrictedMetadata update history
2022-03-30T14:00:00Z : Minor modification : Made by transformation from DIF record, type is hardcoded.
Related resources
Dataset landing page: https://doi.pangaea.de/10.1594/PANGAEA.936342Dataset Citation
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Name: Data Publisher for Earth & Environmental ScienceShort name: PANGAEAPlatform
Instrument
Temporal extent
Start date: 2020-09-21T12:00:00ZEnd date: 2021-04-12T12:00:00ZGeographic extent EPSG:4326
North: 89.3998South: 84.0558East: 121.406West: -29.9446Observation location
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