摘要
二甲基硫(dimethyl sulfide,DMS)海气交换对全球气候和环境变化有重要贡献。本文利用已发表的2005-2017年文献数据,结合ERA-interim(European Centre for Medium-Range Weather Forecasts Interim Re-Analysis)风速数据,估算了黄、东海DMS海气通量,并分析了其季节变化和空间差异。结果表明:南黄海和东海DMS年平均海气通量分别为(8.63±4.90)μmol/(m^(2)·d)和(12.77±8.42)μmol/(m^(2)·d),除秋季外,东海海气通量高于南黄海;DMS海气通量季节变化显著,夏季最大,冬季最小,南黄海秋季高于春季,东海春季高于秋季。基于方差分解,本文讨论了各因子方差对DMS海气通量方差的贡献,在南黄海,春季表层DMS浓度和交换速率均对海气通量有主要影响,夏季和冬季交换速率对海气通量影响较大;在东海,春季海气通量受到交换速率和DMS浓度交互作用的影响较大,夏季海气通量主要由DMS浓度控制,秋季和冬季交换速率对海气通量的影响较大。南黄海和东海占全球海洋面积的0.30%,其DMS排放量为0.1461 TgS/a,占全球海洋DMS排放量的0.52%。
Dimethyl sulfide(DMS)sea-to-air exchange has an important contribution to global climate and environmental changes.This paper estimated the DMS fluxes in the Yellow and East China Seas,and analyzed their spatial and temporal distribution based on the published data from 2005 to 2017,combined with ERAinterim(European Centre for Medium-Range Weather Forecasts Interim Re-Analysis)wind speed data.The results show that the average annual sea-to-air fluxes of the South Yellow and the East China seas are(8.63±4.90)μmol/(m^(2)·d)and(12.77±8.42)μmol/(m^(2)·d),respectively.Except for autumn,the East China Sea DMS flux is higher than that of the South Yellow Sea.The seasonal variations of sea-to-air flux are significant,with the largest in summer and the smallest in winter.The DMS flux of the South Yellow Sea in autumn is higher than that in spring,and the flux of the East China Sea is higher in spring than that in autumn.Based on the variance decomposition,the contribution of each factor to the sea-to-air flux is further discussed.In the South Yellow Sea,the DMS sea-to-air flux in spring is controlled by both the surface DMS concentration and transfer coefficient.The transfer coefficient has a greater impact on the flux in summer and winter.In the East China Sea,the sea-to-air flux in spring is mainly affected by the interaction between the transfer coefficient and the DMS concentration.Moreover,the flux in summer is controlled by the surface DMS concentration,and the transfer coefficient in autumn and winter has a greater impact on the flux.The South Yellow and the East China seas account for approximately 0.30%of the global ocean area,with DMS emissions of 0.1461 TgS/a,accounting for 0.52%of the global ocean DMS emissions.
作者
李亚贤
沈家葳
赵亮
李菲
LI Ya-xian;SHEN Jia-wei;ZHAO Liang;LI Fei(College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin 300457,China;School of Marine Science and Technology,Tianjin University,Tianjin 300072,China)
出处
《海洋环境科学》
CAS
CSCD
北大核心
2022年第2期293-302,共10页
Marine Environmental Science
基金
国家自然科学基金项目(41876018)
国家重点研发计划项目(2016YFA0601301)
天津市自然科学基金项目(19JCZDJC40600)。
关键词
二甲基硫
海气通量
交换速率
方差分解
黄、东海
dimethyl sulfide
sea-to-air flux
transfer coefficient
variance decomposition
Yellow and East China seas
