Monthly total freeboard and snow depth over Arctic sea ice from AMSR-E&2 and AVHRR measurements (2003-2020)

• Main Authors: Lee, Sang-Moo, Shi, Hoyeon, Sohn, Byung-Ju, Gasiewski, Albin. J., Meier, Walter N., Dybkjær, Gorm
• Format: Dataset
• Language: English
• Published: Zenodo 2021
• Subjects: Snow on sea ice, total freeboard, Sea ice, Arctic climate, Satellite observations; Arctic; National Snow and Ice Data Center; Sea ice
• Online Access: https://dx.doi.org/10.5281/zenodo.4816215; https://zenodo.org/record/4816215

[Data description] Monthly total freeboard (Ft) and snow depth (hs) over Arctic sea ice data for January-February-March months of the 2003-2020 period produced by Lee and Shi et al. (2021, manuscript in preparation) are provided. Both variables are derived from satellite passive infrared and microwave measurements: Total freeboard was obtained from AMSR-E&2 measurements and snow depth was estimated from the AMSR and AVHRR measurements. The uploaded file titled "monthly averaged total freeboard and snow depth (JFM 2003-2020).zip" contains two directories: one for total freeboard and the other for snow depth. Naming convention is "variable_yyyymm.bin" and data format is 32-bit floating point array in shape of 304 x 448 (25 km polar stereographic grid). Here we provide an example Python code to read monthly snow depth of January 2003 using numpy. import numpy as np hs = np.fromfile('hs_200301.bin', dtype=np.float32).reshape(448,304) Geocoordinate tools for the 25 km polar stereographic grid are available at NSIDC website (https://nsidc.org/data/polar-stereo/tools_geo_pixel.html) [Abbreviations] AMSR: Advanced Microwave Scanning Radiometer AVHRR: Advanced Very High Resolution Radiometer NSIDC: National Snow and Ice Data Center : Update for version 2: ice bottom temperature is changed from -1.8 to -1.5 degree Celsius for snow depth calculation.