남해안 및 동중국해에서 위성에서 추정된 표층 수온 및 클로로필-a의 장기적인 변화

Abstract

The purpose of this study is to investigate climatolgoical variations from the temporal and spatial surface temperature (SST), chlorophyll-a concentration (Chl-a), phytoplankton size class (PSC) using NOAA AVHRR, SeaWiFS, and MODIS data in the South Sea of Korea (SSK) and East China Sea (ECS). 26-year monthly SST and 13-year monthly Chl-a and PSC data separated by whole and nine-different area were used to understand seasonal and inter-annual variations. SST and Chl-a showed clearly seasonal variations that higher SST and Chl-a were observed during the summer and spring and lower values occurred during the winter and summer. Inter-annual variation of SST was linearly increased with decreasing Chl-a. Long-term linear increasing trend of annual and monthly SST during 26 year was 0.6~1.0 ºC and annual and monthly chlorophyll-a concentration was linearly decreased with 0.29~0.30 mg/m3. Inter-annual differences were observed on whole and nine-different area, which related to one or more physical forcing factors. To determine more detailed spatial and temporal variations, we used the combined data such as monthly SST, Chl-a PSC in this study. Between 1998 and 2010, the inter-annual trend of Chl-a was decreased with decreasing micro- and nano-size plankton and increasing pico-size plankton. In regional analysis, the west region of the study area was spatially and temporally correlated with the a in the South Sea of Korea (SSK) and East China Sea (ECS). 26-year monthly SST and 13-year monthly Chl-a and PSC data separated by whole and nine-different area were used to understand seasonal and inter-annual variations. SST and Chl-a showed clearly seasonal variations that higher SST and Chl-a were observed during the summer and spring and lower values occurred during the winter and summer. Inter-annual variation of SST was linearly increased with decreasing Chl-a. Long-term linear increasing trend of annual and monthly SST during 26 year