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Table 1.

Dates and weather conditions of the MOSAiC ARIEL transects from late August through September 2020

DateARIEL Measure CodeAir Temperature (°C)aWeather Conditions
Main ice floe CO3 
 Aug 30 59-376 −0.60 After melting period, wet ice 
 Aug 31 60-9 −0.75 Small ice pellets precipitated 
 Sep 3 60-79 −0.64 Freezing conditions for 3 days, melt ponds still open, 2-cm snow depth 
 Sep 7 61-58 −3.41 Freezing, windy with snow the previous days, all ponds frozen, drifting snow, wet snow and ice 
 Sep 10 60-145 −7.90 Freezing conditions with light snow grains falling (approximately 7-cm snow depth), melt ponds frozen 
 Sep 14 61-14 −2.53 Melting conditions with rain, mist, and strong gusts in the morning 
 Sep 17 60-104 −6.26 Snow drifts, 2-cm snow depth on top of crust layer 
Departing ice floe 
 Sep 24 63-38 −0.85 Wet snow, some pooling with higher salinity, windy and cloudy 
 Sep 26 63-70 −5.07 New snow, calm and cloudy, snowing later in the day 
 Sep 30 63-242 −6.09 Drifted and wind-packed snow, windy 
DateARIEL Measure CodeAir Temperature (°C)aWeather Conditions
Main ice floe CO3 
 Aug 30 59-376 −0.60 After melting period, wet ice 
 Aug 31 60-9 −0.75 Small ice pellets precipitated 
 Sep 3 60-79 −0.64 Freezing conditions for 3 days, melt ponds still open, 2-cm snow depth 
 Sep 7 61-58 −3.41 Freezing, windy with snow the previous days, all ponds frozen, drifting snow, wet snow and ice 
 Sep 10 60-145 −7.90 Freezing conditions with light snow grains falling (approximately 7-cm snow depth), melt ponds frozen 
 Sep 14 61-14 −2.53 Melting conditions with rain, mist, and strong gusts in the morning 
 Sep 17 60-104 −6.26 Snow drifts, 2-cm snow depth on top of crust layer 
Departing ice floe 
 Sep 24 63-38 −0.85 Wet snow, some pooling with higher salinity, windy and cloudy 
 Sep 26 63-70 −5.07 New snow, calm and cloudy, snowing later in the day 
 Sep 30 63-242 −6.09 Drifted and wind-packed snow, windy 

aObtained from the 2-m height sensor on the Meteorological tower (Shupe et al., 2022).

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