Affiliation:
1. Physical Oceanography Laboratory/CIMST, Ocean University of China and Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
2. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California
Abstract
AbstractThe response of the South China Sea (SCS) circulation to intraseasonal variability of the summer monsoon is studied with both observations and a 1.5-layer reduced-gravity model. Intraseasonal variability of the SCS summer monsoon is characterized by evolution of the wind jet intensity in the midbasin with typical amplitude of 6 m s−1 and several peaks on its power spectrum between 10 and 60 days. However, this study finds that intraseasonal variability of the sea surface height (SSH) in the SCS presents significant variability to the southeast of Vietnam with amplitude of 6 cm and a period only between 40 and 60 days. This implicates the frequency selectivity of oceanic response to wind forcing. Numerical experiments suggest that the intrinsic variability of the SCS circulation accounts for this phenomenon. Based on the Rossby basin mode theory, this is explained by the interaction between the long, westward-propagating Rossby waves and the short, eastward-propagating Rossby waves.
Funder
National Natural Science Foundation of China
Creative Research Groups of China
National Key Scientific Instrument and Equipment Development Projects of China
WenHai Project of Shandong Province
Special Fund for the Strategic Priority Research Program of the Chinese Academy of Sciences
Global Change and Air-Sea Interaction Project
National Science Foundation
Publisher
American Meteorological Society
Cited by
7 articles.
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