Interannual variation of freshwater in the yellow and East China Seas: Roles of the Changjiang discharge and wind forcing

Pil Hun Chang, Atsuhiko Isobe

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The interannual variation of the behavior of Changjiang freshwater has been investigated using the Princeton Ocean Model (POM). Five experiments are described in this study. Three basic experiments (Exps. B1, B2 and B3) were performed to examine the freshwater behavior in response to annual variations of the Changjiang discharge in normal, wet and dry years, respectively. Thereafter, the freshwater variation was investigated with the model forced by primary-interannual variations of river discharge with an 8-year period (Exp. I1) and a wind field with a 3.6-year period (Exp. I2). In Exp. B1, the average residence time of freshwater is roughly estimated to be 681.4 days in the Yellow Sea (YS) and 353.4 days in the combined area of the East China Sea (ECS) and the Chinese Coast (CC). This difference is attributed to the current pattern in each region and freshwater exchange among the regions. The interannual variation of freshwater volume in Exp. I1 has a large amplitude and long phase lag in the YS (38 km3 and 1.6-year against primary-interannual discharge variation), while there are relatively small amplitudes and short phase lags in the ECS (18 km3 and 0.7-year) and the CC (14 km3 and 0.5-year). It is concluded that the difference in the freshwater behavior results from the difference in the average residence time in each region.

Original languageEnglish
Pages (from-to)817-834
Number of pages18
JournalJournal of Oceanography
Volume61
Issue number5
DOIs
Publication statusPublished - Oct 2005

All Science Journal Classification (ASJC) codes

  • Oceanography

Fingerprint Dive into the research topics of 'Interannual variation of freshwater in the yellow and East China Seas: Roles of the Changjiang discharge and wind forcing'. Together they form a unique fingerprint.

Cite this