EGU23-5783
https://doi.org/10.5194/egusphere-egu23-5783
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Acceleration of Antarctic Circumpolar Current at the Drake Passage during the GRACE era

Chengcheng Yang1, Xuhua Cheng1,2, Duotian Huang1, Jianhuang Qin1,2, Guidi Zhou1, and Jiajia Chen1
Chengcheng Yang et al.
  • 1Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, Hohai University, Nanjing, China （xuhuacheng@hhu.edu.cn）
  • 2Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai), Zhuhai, China

Previous studies have identified intense climatic change in the Southern Ocean. However, the response of ACC transport to climate change is not fully understood. In this study, by using in-situ ocean bottom pressure (OBP) records and five GRACE products, long-term variations of ACC transport are studied. Our results confirm the reliability of GRACE CSR mascon product in ACC transport estimation at the Drake Passage. Superimposed on interannual variability, ACC transport exhibits an obvious increasing trend (1.32±0.07Sv year-1) during the GRACE era. Based on results of a mass-conservation ocean model simulation, we suggest that the acceleration of ACC is associated with intensified westerly winds and loss of land ice in Antarctica.

How to cite: Yang, C., Cheng, X., Huang, D., Qin, J., Zhou, G., and Chen, J.: Acceleration of Antarctic Circumpolar Current at the Drake Passage during the GRACE era, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-5783, https://doi.org/10.5194/egusphere-egu23-5783, 2023.