статья в журнале

En

Journal of Marine Science and Engineering

ISSN:20771312

2024

Li, Gang¹

He, Yijun²

Wen, Jinghan¹

Liu, Guoqiang³

Lu, Xiaojie¹

Perrie, W.¹

10.3390/jmse12050761

A long-term time series of 319 Sentinel-1 SAR Imagery with Interferometric Wide Swath (IW) mode was used to study the characteristics of submesoscale eddies over Japanese coastal regions from 2015 to 2021, including spatiotemporal eddy properties and possible mechanisms of their formation. The results showed that around 98% of the 1499 eddies identified from the SAR snapshots were submesoscale eddies (horizontal scales of (Formula presented.) km) with a ratio of around 78% cyclones to around 22% anticyclones. Around 8% of the submesoscale eddies were found in these SAR images in winter since the submesoscale current-induced signals are masked by the stronger wind speed, compared with other seasons. Typical features of submesoscale eddies are summarized, providing a preliminary qualitative analysis of potential generation mechanisms specific to the eddy characteristics in this region. This study suggests that Sentinel-1 images are capable of providing insights into the observed submesoscale eddies near the coastal regions of eastern Japan, thereby contributing to the improved understanding of the generation of submesoscale eddies. © 2024 by the authors.

Japanese coast, Sentinel-1 imagery with IW mode, submesoscale eddies

2024-07-31 13:43:49