Andreas Preußer
Preußer
Andreas
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
AWI
Marcel Nicolaus
Nicolaus
Marcel
Mario Hoppmann
Hoppmann
Mario
Snow depth, sea ice thickness and interface temperatures derived from measurements of SIMBA buoy 2020T77
PANGAEA
Data Publisher for Earth & Environmental Science
dataset
The Snow and Ice Mass Balance Array (SIMBA) is a thermistor string type IMB (Jackson et al., 2013) which measures the environmental temperature SIMBA-ET and a temperature change around the thermistors after a weak heating is applied to each sensor (SIMBA-HT). SIMBA 2020T77 (a.k.a. PRIC_1005) is an autonomous instrument that was installed on drifting sea ice in the Arctic Ocean (Polarstern PS122 (MOSAiC) in 2019/20) as part of the project PRIC. Its thermistor chain is 5 m long, and equipped with 241 thermistors (Maxim Integrated DS28EA00) at a spacing of 2 cm. Based on a manual classification method, the SIMBA-ET and SIMBA-HT were processed to obtain snow depth and ice thickness (smoothed with a 3-day running mean), as well as the thermistor number, the vertical position Z relative to the snow-ice interface and the measured SIMBA-ET at each detected interface (atmosphere-snow, snow-ice and ice-ocean) for the period between 2020-04-04T14:30:17 and 2020-06-05T14:30:16. To do this, we combined two derivatives of measured temperatures (the ET vertical gradient and HT rise ratio) to reduce the detection uncertainty of all interfaces considered. The snow or ice surface, consequentially the snow depth, is determined by the ET vertical gradient. Potential formation of snow ice is not explicitly considered in this data set, but may occur as depicted by vertical changes of the snow-ice interface position. The ice-ocean interface is usually determined using the HT rise ratio and serves as the lower limit for ice thickness. Overall, the accumulated error is 2 to 4 times the sensor spacing for both the snow depth and ice thickness. For interface temperatures, individual sensors in the chain measure with a temperature resolution of 0.0625°C, with the overall accuracy landing in the range of ± 2°C (Jackson et al., 2013). After the snow cover has melted, negative values for snow depth may indicate the onset of ice surface melt.
Ruibo Lei
Lei
Ruibo
Jennifer K Hutchings
Hutchings
Jennifer K
Zhuoli Yuan
Yuan
Zhuoli
Temperature and heating induced temperature difference measurements from SIMBA-type sea ice mass balance buoy 2020T77, deployed during MOSAiC 2019/20
dataset bundled publication
Keith Jackson
Jackson
Keith
Jeremy Wilkinson
Wilkinson
Jeremy
Ted Maksym
Maksym
Ted
David T Meldrum
Meldrum
David T
Justin Beckers
Beckers
Justin
Christian Haas
Haas
Christian
David Mackenzie
Mackenzie
David
A Novel and Low-Cost Sea Ice Mass Balance Buoy
Journal of Atmospheric and Oceanic Technology
journal article
Autonomous measurements of sea ice properties of buoy 2020T77
SEAICE Portal
webpage
Buoy Deployment Report 2020T77
report
Andreas Preusser
Preusser
Quicklook of SIMBA 2020T77
other
Pan-Arctic observing System of Systems: Implementing Observations for societal Needs (Arctic PASSION)
Horizon 2020 of the European Commission
data points
DATE/TIME
Time
LATITUDE
LONGITUDE
Sea ice thickness
Manual classification
Length
Snow thickness
Sea ice thickness, uncertainty
Snow thickness, uncertainty
Distance, atmosphere/snow interface, relative to initial ice surface
distance
atmosphere
relative
Temperature, atmosphere/snow interface
Temperature
Thermistor number, at atmosphere/snow interface
Distance, snow/ice interface, relative to initial ice surface
snow
Temperature, snow/ice interface
Thermistor number, at snow/ice interface
Distance, ice/ocean interface, relative to initial ice surface
ice
Temperature, ice/ocean interface
Thermistor number, at ice/ocean interface
Arctic PASSION; Autonomous buoy; Ice mass balance; Sea ice interfaces; Sea ice thickness; snow depth; Temperature thermistor
unrestricted
text/tab-separated-values
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