The CO₂ Flux At Sea-atmosphere Interface In The South Yellow Sea In Spring And Comparing With It In Summer

Rooted in the China SOLAS, combination with the data in hydrology, chemistry and biology, the pCO₂ data obtained from the two cruises in March, 2005 and May, 2005 in the SYS is served to discuss pCO₂ distribution features and flux besides the major factors that affect it. Meanwhile based on the data collected in July, 2001, pCCO₂ distribution in the surface seawater of the SYS in spring and summer is detailed described and compared. The main results are following: 1. pCO₂ in the surface seawater in the SYS is ranged 360-640μatm in March ,and pCO₂ in the middle and east is higher than the northern and western sea. DIC is ranged 24.8-27mg/L, and ALK is 2.25-2.40mmol/L. The SYS temperature is ranged 2.5-9℃, salinity 31.8-32.2, and pH 7.99-8.14. All the parameters are consistent in the surface, middle and bottom layers. The vertical distribution section maps of temperature and salinity in March show that the vertical mixing of the SYS water is even so that the higher pCO₂ in bottom water could supply the surface. The SYS is affected by the South Shandong Coastal Water, Northern Jiangsu Coastal Water, the Yellow Sea Warm Current Water and so on in March, and the Yellow Sea Warm Current Water affect even all the Yellow Sea. The character of water mass in the North Yellow Sea, the coastal current and the middle SYS is so different that pCO₂ in the three areas are different. The CO₂ flux in the SYS is almost positive (about +9.24mol·m^-2·a^-1CO₂) and the SYS is the intense source which releases 3.17*10⁶tC to the atmosphere in March. The sea area which is affected by the Yellow Sea Warm Current Water contributes the most to the source. 2. In May, pCO₂ in the surface of the SYS is ranged 240-580μatm. pCO₂ in shore...