Dissolved oxygen responses to tropical cyclones "Wind Pump" on pre-existing cyclonic and anticyclonic eddies in the Bay of Bengal

Huabing Xu; Danling Tang; Yupeng Liu; Ying Li

doi:10.1016/j.marpolbul.2019.07.019

Dissolved oxygen responses to tropical cyclones "Wind Pump" on pre-existing cyclonic and anticyclonic eddies in the Bay of Bengal

Mar Pollut Bull. 2019 Sep:146:838-847. doi: 10.1016/j.marpolbul.2019.07.019. Epub 2019 Jul 24.

Authors

Huabing Xu¹, Danling Tang², Yupeng Liu³, Ying Li³

Affiliations

¹ College of Electronic and Information Engineering, Guangdong Ocean University, Zhanjiang, China; Guangdong Key Laboratory of Ocean Remote Sensing, State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
² Guangdong Key Laboratory of Ocean Remote Sensing, State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China. Electronic address: lingzistdl@126.com.
³ Guangdong Key Laboratory of Ocean Remote Sensing, State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China.

PMID: 31426226
DOI: 10.1016/j.marpolbul.2019.07.019

Abstract

This study examines how dissolved oxygen (DO) responds to tropical cyclones (TCs) "Wind Pump" in a pre-existing cyclonic and an anticyclonic eddy over the Bay of Bengal (BoB) based on Argo and satellite data. Both TCs induced DO temporal decreases in the subsurface waters (Deep Depression BOB 04 with a pre-existing cyclonic eddy and cyclonic storm Roanu with a pre-existing anticyclonic eddy) owing mainly to the storm-induced upwelling. The deeper oxycline caused by the pre-existing anticyclonic eddy relieved the storm-induced shallow of oxycline during Roanu. On the contrary, the pre-existing cyclonic eddy shoaled the oxycline, intensifying the storm-induced shallow of oxycline during BOB 04. Furthermore, the pre-existing cyclonic eddy induced a long time of DO decrease after BOB 04. This study suggests that the subsurface DO concentrations in the BoB are affected mainly by storm-induced physical processes, and the mesoscale eddies also play an important role.

Keywords: Bay of Bengal; Dissolved oxygen; Mesoscale eddies; Oxycline; Tropical cyclones.

MeSH terms

Bays
Cyclonic Storms
Oxygen / analysis*
Seawater / analysis*
Solubility
Wind

Substances

Oxygen