Advances in Earth Science ›› 2020, Vol. 35 ›› Issue (5): 441-451. doi: 10.11867/j.issn.1001-8166.2020.041

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Study About Ocean Eddy Effect on Strong Convection in Local Atmosphere over the Kuroshio Extension Region

Qinyu Liu 1, 2( ),Suping Zhang 1, 2( ),Yinglai Jia 1, 2   

  1. 1.Physical Oceanography Laboratory of Ocean University of China, Ocean-Atmosphere Interaction and Climate Laboratory, Qingdao 266100, China
    2.Qingdao National Laboratory for Marine Science and Technology,Qingdao 266100, China
  • Received:2020-03-07 Revised:2020-04-10 Online:2020-05-10 Published:2020-06-05
  • Contact: Suping Zhang E-mail:liuqy@ouc.edu.cn;zsping@ouc.edu.cn
  • About author:Liu Qinyu (1946-), female, Qingdao City, Shandong Province, Professor. Research areas include the ocean-atmosphere interactions. E-mail: liuqy@ouc.edu.cn
  • Supported by:
    the National Natural Science Foundation of China "Sea-air interaction mechanism in the Kuroshio and extended sea areas and its climate effect"(41490643)

Qinyu Liu,Suping Zhang,Yinglai Jia. Study About Ocean Eddy Effect on Strong Convection in Local Atmosphere over the Kuroshio Extension Region[J]. Advances in Earth Science, 2020, 35(5): 441-451.

The Kuroshio Extension (KE) is the key area where the water heats the atmosphere in the northwestern Pacific Ocean in winter. Previous studies show that the active eddies in the KE area can affect sea surface temperature and thus sea surface winds. The present study reviewed the progress about the influences of the eddies on local atmosphere in recent years. Analysis and comparison were made especially for the achievements from shipboard sounding data, satellite observations and numerical experiments. Based on the geostrophic adaptation theory involved in atmospheric anomalies induced by the eddies, the following new scientific deductions were suggested: Air pressure adjustment mechanism dominated in the atmospheric response to eddies under the conditions of weaker wind speed over the eddies. The influence of eddies was often limited in the atmospheric boundary layer. On the other hand, vertical mixing mechanism played a major role in the response of the atmosphere to warm (cold) eddies when air moved faster over the eddies. Surface wind speed increased (decreased) over the warm (cold) water. Significant wind convergence took place downwind the warm water, and large amount of water vapor was transported also downwind from the warm water surface. The positive feedback between water vapor condensation and rising air forced by the surface convergence provided necessary conditions for the development of strong convection in atmosphere. These deductions will be conducive to further depicting the impact of oceanic eddies on the atmosphere quantitatively.

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