Surface manifestations of internal solitary waves in the Western Arctic Ocean
Description
The dataset includes the results of synthetic aperture radar (SAR) processing and identification of internal solitary waves (ISWs) in the Western Arctic Ocean in summer periods of 2007, 2011, 2016, 2018 and 2020. The processed data include those acquired by the European Space Agency's Envisat Advanced SAR (ASAR) instrument in June-October 2007 and 2011, and by the contemporary Sentinel-1 A/B SAR-C missions in August-September 2018 and June-October 2020. In addition, L-band SAR images from the Japanese ALOS-2 PALSAR-2 instrument operated by the Japan Aerospace Exploration Agency (JAXA) were used for August-October 2016. Envisat ASAR data were obtained from ESA's rolling archive. These ASAR images were in Wide Swath mode with a spatial resolution of 150 m. In total, 369 ASAR images were analyzed: 159 from 2007 and 210 from 2011. Sentinel-1 A/B data were obtained from the Alaska Satellite Facility portal (https://search.asf.alaska.edu/). These consisted of high- and medium-resolution Ground Range Detected images captured in Interferometric Wide (IW) and Extra-Wide (EW) swath modes, with approximate spatial resolutions of 20 m and 90 m, respectively. A total of 2322 (694) S1A/B images acquired in June-October 2020 (August-September 2018) were analyzed. In addition, 36 ALOS-2 PALSAR-2 images acquired in August-October 2016 were also utilized. These L-band SAR images were acquired in ScanSAR nominal, Fine, and Ultra-fine modes, with spatial resolutions of 50 m, 12.5 m, and 5 m, respectively. Overall, 3421 SAR images were used in the analysis. The dataset includes 2 mat files. The first, SAR-coverage.mat is the total SAR coverage of the study region by SAR data at 900x1200 grid. The second, isw_properties_gridded.mat includes parameters num_waves (total number of ISW detections), isw_probability (probability of ISW observations) and overlap (SAR coverage) interpolated to 29х49 horizontal grid (grid cell size is 0.5° in latitude and 1.5° in longitude) covering the region spanning 64.5-79.5° N, 110-185° W.