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Observations Reveal Intense Air‐Sea Exchanges Over Submesoscale Ocean Front

Authors :
Haiyuan Yang
Zhaohui Chen
Shantong Sun
Mingkui Li
Wenju Cai
Lixin Wu
Jinzhuo Cai
Bingrong Sun
Ke Ma
Xiaohui Ma
Zhao Jing
Bolan Gan
Source :
Geophysical Research Letters, Vol 51, Iss 2, Pp n/a-n/a (2024)
Publication Year :
2024
Publisher :
Wiley, 2024.

Abstract

Abstract Air‐sea exchanges across oceanic fronts are critical in powering cloud formation, precipitation, and atmospheric storms. Oceanic submesoscale fronts of scales 1–10 km are characterized by strong sea surface temperature (SST) gradients. However, it remains elusive how submesoscale fronts affect the overlying atmosphere due to a lack of high‐resolution observations or models. Based on rare high‐resolution in situ observations in the Kuroshio Extension region, we quantify the air‐sea exchanges across an oceanic submesoscale front. The cross‐front SST and turbulent heat flux gradients reaches 2.4°C/km and 47 W/m2/km, respectively, far stronger than that typically found in mesoscale‐resolving products. The stronger SST gradient drives substantially stronger air‐sea fluxes and vertical mixing than mesoscale fronts, enhancing cloud formations. The intense air‐sea exchanges across submesoscale fronts are confirmed in idealized model simulations, but not resolved in mesoscale‐resolving climate models. Our finding provides essential knowledge for improving simulations of cloud formation, precipitation, and storms in climate models.

Details

Language :
English
ISSN :
19448007 and 00948276
Volume :
51
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Geophysical Research Letters
Publication Type :
Academic Journal
Accession number :
edsdoj.85dd595ea3b345b78ad8321ec5c71f78
Document Type :
article
Full Text :
https://doi.org/10.1029/2023GL106840