양자강 담수가 황해, 동중국해 해면수온 상승에 미치는 영향

Abstract

This study explores the effects of the Changjiang river discharge (CRD) on the density stratifications and associated sea surface temperature (SST) changes using a global ocean general circulation model with regional focus on the Yellow and East China Seas (YECS). The regressed field of SST on the CRD and cyclostationary EOF analysis find that the CRD contributes to maintaining warm sea surface in August. Heat budget analysis demonstrates that this warming is attributable to the formation of CRD-induced barrier layer, which tends to enhance stratification at the mixed layer base, thereby reducing both vertical mixing and entrainment cooling. This result suggests that the CRD-induced barrier layer is an important contributor to the surface heat budget in the YECS in summer. and East China Seas (YECS). The regressed field of SST on the CRD and cyclostationary EOF analysis find that the CRD contributes to maintaining warm sea surface in August. Heat budget analysis demonstrates that this warming is attributable to the formation of CRD-induced barrier layer, which tends to enhance stratification at the mixed layer base, thereby reducing both vertical mixing and entrainment cooling. This result suggests that the CRD-induced barrier layer is an important contributor to the surface heat budget in the YECS in summer.