Contrasting Air-Sea Coupling Processes of Conventional and Unconventional Oceanic Eddies in the East China Sea during Winter

Song, Tangshan, Qian, Shengyi, Hu, Haibo, Zhai, Xiaoming, Yang, Xiu-Qun and Chen, Weixuan (2026) Contrasting Air-Sea Coupling Processes of Conventional and Unconventional Oceanic Eddies in the East China Sea during Winter. Journal of Geophysical Research - Oceans. ISSN 2169-9275 (In Press)

Microsoft Word (Chen_etal_rba13-03-02-2026-4537) - Accepted Version Available under License Creative Commons Attribution. Download (5MB)

Abstract

Both conventional (cold cyclonic and warm anticyclonic) and unconventional (warm cyclonic and cold anticyclonic) oceanic eddies are frequently observed near the Kuroshio axis in the East China Sea, as identified from daily oceanic reanalysis datasets during winter months since 1993. These four types of eddies exhibit remarkably different temporal evolution characteristics and spatial distribution patterns, along with contrasting 3D thermal and dynamic structures. Each eddy type demonstrates significantly varying intensities in multiple oceanic and atmospheric physical quantities, including sea surface temperature (SST) anomalies, vorticity fields, and heat flux exchanges. In particular, the air-sea coupling relationships presented by the correlations between SST and air-sea turbulent heat flux over the conventional and unconventional eddies exhibit opposite characteristics, which are likely to contribute to longer (shorter) lifespans of conventional (unconventional) eddies. In addition, the difference in air-sea heat flux anomalies associated with four eddy types determines the corresponding responses of the lower and middle atmosphere over the oceanic eddies, including the 3D air temperature, horizontal wind, vertical velocity at various pressure levels and the atmospheric boundary layer height.

Item Type:	Article
Additional Information:	Data Availability Statement: The datasets used in our study are the GLORYS12V1 reanalysis (https://doi.org/10.48670/moi 00021) (Fernandez & Lellouche, 2021), the Hybrid Coordinate Ocean Model (HYCOM) product Global Ocean Forecasting System (GOFS) 3.1 output (https://www.hycom.org/dataserver/gofs 3pt1/reanalysis) (Metzger et al., 2017), the Global Ocean Gridded L 4 Sea Surface Heights And Derived Variables Reprocessed 1993 Ongoing (https://doi.org/10.48670/moi-00148), the ESA SST CCI and C3S reprocessed sea surface temperature analyses (https://doi.org/10.48670/moi-00169) and the fifth generation European Centre for Medium-Range Weather Forecasts reanalysis (ERA5) for the global climate and weather for the past eight decades (https://cds.climate.copernicus.eu/datasets/reanalysis-era5- single-levels?tab=overview; https://cds.climate.copernicus.eu/datasets/reanalysis-era5- pressure-levels?tab=overview) (Hersbach et al., 2017, 2023)
Uncontrolled Keywords:	kuroshio front, unconventional oceanic eddies,air-sea interaction,east china sea
Faculty \ School:	Faculty of Science > School of Environmental Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Related URLs:	https://ueanorwich-my.sharepoint.com/:b:...
Depositing User:	LivePure Connector
Date Deposited:	03 Feb 2026 16:34
Last Modified:	04 Feb 2026 01:23
URI:	https://ueaeprints.uea.ac.uk/id/eprint/101829
DOI:

Downloads

Actions (login required)

View Item