TY - JOUR
T1 - Interannual variation of freshwater in the yellow and East China Seas
T2 - Roles of the Changjiang discharge and wind forcing
AU - Chang, Pil Hun
AU - Isobe, Atsuhiko
N1 - Funding Information:
The authors express their sincere thanks to the journal reviewers for their beneficial suggestions for improving the manuscript. This study was supported by Grant-in-Aid for Scientific Research (KAKENHI 14204045) from Japan Society for the Promotion of Science.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/10
Y1 - 2005/10
N2 - 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.
AB - 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.
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U2 - 10.1007/s10872-006-0002-5
DO - 10.1007/s10872-006-0002-5
M3 - Article
AN - SCOPUS:31744433746
VL - 61
SP - 817
EP - 834
JO - Journal of Oceanography
JF - Journal of Oceanography
SN - 0916-8370
IS - 5
ER -