3,4,- 1State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, China
- 2Beijing Engineering Research Center for Global Land Remote Sensing Products, Faculty of Geographical Science, Beijing Normal University, Beijing, China
- 3Frontiers Science Center for Deep Ocean Multi-spheres and Earth System/Key Laboratory of Physical Oceanography/Academy of the Future Ocean, Ocean University of China, Qingdao, China
- 4Laoshan Laboratory, Qingdao, China
- 5State Key Laboratory of Satellite Ocean Environment Dynamics, National Marine Environmental Forecasting Center, Beijing, China
- 6Key Laboratory of Research on Marine Hazards Forecasting, Ministry of Natural Resources, Beijing, China
- 7China Meteorological Administration Key Laboratory for Climate Prediction Studies, National Climate Centre, Beijing, China
The Hadley circulation (HC) is an important atmospheric circulation system connecting the tropics and subtropics, and variabilities of regional HC exhibit significant impacts on tropical cyclones (TC). However, the potential feedback of TC on the regional HC remains unclear. Here, we reveal that western North Pacific TC (WNPTC) activity exerts a significant 1-month lagged negative effect on the western Pacific HC intensity (WPHCI), and this relationship is independent of the influence of El Niño–Southern Oscillation (ENSO). We show that WNPTC activity can influence variations in environmental fields through modulating the variations of sea surface temperature over WP, thereby altering the thermal conditions and energy conversion, ultimately contributing to the weakening of the WPHC. The mechanism is further validated by sensitivity experiments. Our results demonstrate the significant effect of WNPTC activity on its adjacent meridional circulation, and illustrate the unignorable cumulative effect of extreme weather systems on the climate systems, which is especially important for that more frequent extreme events are projected under global warming.
How to cite: Xu, F., Feng, J., Li, J., Ji, X., and Wang, Y.: Western North Pacific Tropical cyclones act to suppress its adjacent Hadley circulation, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-7201, https://doi.org/10.5194/egusphere-egu26-7201, 2026.
