PANGAEA_973303 Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2023S128, deployed during Charcot expedition 2023 Nicolaus, Marcel; von Albedyll, Luisa Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2023S128, deployed during Charcot expedition 2023 2024-11-18 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.973303 Investigator Marcel Nicolaus marcel.nicolaus@awi.de Earth Science DATE/TIME LATITUDE LONGITUDE Snow height Pressure, atmospheric Temperature, air Temperature, technical Global positioning system, time since last fix Quality flag, snow height Quality flag, atmospheric pressure Quality flag, air temperature Quality flag, technical temperature Quality flag, position geoscientificInformation 2023S128, WMO5802061 autonomous platform buoy Char2023/1_2023S128 Charcot23 drift Sea ice Snow buoy snow depth Snow buoy LE COMMANDANT CHARCOT 2023-08-31 2024-03-29 Complete 71.645 89.9932 -89.9856 155.4484 meereisportal.de Current sea ice maps for Arctic and Antarctic IABP International Arctic Buoy Program MIDO Multidisciplinary Ice-based Distributed Observatory Arctic_PASSION Pan-Arctic observing System of Systems: Implementing Observations for societal Needs AWI_SeaIce Sea Ice Physics @ AWI unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 80832 data points text/tab-separated-values Buoy Deployment Report 2023S128. https://download.pangaea.de/reference/130094/attachments/2023S128_deployment.pdf

Snow height was measured by the Snow Buoy 2023S128, an autonomous platform, drifting on Arctic sea ice, deployed during expedition with Le Commandant Charcot in 2023. The resulting time series describes the evolution of snow height as a function of place and time between 31 Aug 2023 and 29 March 2024 in sample intervals of 1 hour. The Snow Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and an internal ice 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. 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). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.973303"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.org/10.3030/101003472 Arctic_PASSION https://iabp.apl.uw.edu/ IABP https://www.awi.de/en/about-us/organisation/staff/single-view/marcel-nicolaus.html https://www.awi.de/en/science/climate-sciences/physical-oceanography/projects/mido.html MIDO https://www.awi.de/en/science/climate-sciences/sea-ice-physics.html AWI_SeaIce https://www.meereisportal.de/en/ meereisportal.de DIF 9.4 2024-11-18 2026-04-29