摘要
基于在2006年夏季北黄海收集的的高分辨率的表层CO2分压(pCO2)数据,结合水文和生物地球化学同步观测参数,探讨了夏季北黄海pCO2空间分布的控制因素。结果表明,夏季北黄海与大多数中低纬度陆架海类似,由于水温较高,表层pCO2较高(平均值为(463±41)μatm),整个海域相对大气CO2过饱和。表层pCO2分布具有明显的区域差异,辽南和鲁北近岸海域pCO2明显高于中部区域,辽南近岸的高pCO2主要与河流输入和水产养殖引起的生物好氧呼吸有关,而鲁北沿岸的高pCO2主要与烟台近岸的底层冷水涌升及由混合引起的高碳酸盐含量的黄河泥沙的再悬浮有关;在海区中部大部分水域,pCO2与温度之间有较好的相关性,说明温度是这一区域pCO2分布较为重要的控制因子。另外,采用Wannikhof的海-气气体交换系数估计了北黄海夏季海-气CO2通量,结果表明整个北黄海是大气CO2的源,平均释放速率为(4.00±0.57)mmol.m-2.d-1,高于南黄海夏季海-气CO2通量。
In this paper,we presented the distribution of surface CO2 partial pressure（pCO2） of the northern Yellow Sea（NYS） based on a high spatial resolution measurement during summer 2006,and investigated their controlling factors in combination with associated physical and biogeochemical parameters.The results indicate that the entire NYS during summer is oversaturated with respect to the atmospheric CO2,with high pCO2 values of（463±41） atm due to high water temperature.This pCO2 pattern in the NYS is similar to that in most of the mid-and high latitude shelves in the world.Surface pCO2 also has significant regional variability,with high values in the Liaonan and Lubei coastal regions,and relatively low values in the central NYS.High pCO2 values in the Liaonan coastal region are related to the aerobic respiration of organic matter delivered by river inputs and aquiculture.And high pCO2 in the Lubei coastal region is caused by the upwelling of bottom cold water around Yantai and the resuspension of inorganic carbon rich mud from the Huanghe River（a.k.a Yellow River）.In contrast,a good relationship between surface pCO2 and the surface temperature existes in the central NYS,indicating the important role of temperature in the pCO2 distribution.Furthermore,we estimate the air-sea CO2 flux during summer 2006 based on the parameterization of gas transfer velocity of Wannikhof（1992）.Results show that NYS is an atmospheric CO2 source during summer,with an average efflux rate of（4.00±0.57） mmol·m-2·d-1,higher than that in the Southern Yellow Sea during summer.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第12期22-29,共8页
Periodical of Ocean University of China
基金
国家908专项(908-01-ST02)资助
