海洋气象学报2025，Vol.45Issue(2)：118-126,9.DOI:10.19513/j.cnki.hyqxxb.20240526001
全球海洋叶绿素a浓度时空演变及其与气候变化因子的相关分析
Spatiotemporal variability of global ocean Chlorophyll-a concentration and its correlation with climate change factors
摘要
Abstract
Chlorophyll-a(Chl-a)concentration serves as a crucial indicator of marine phytoplankton biomass,reflecting the richness and diversity of marine ecosystems.Satellite remote sensing technology offers significant advantages in monitoring the spatiotemporal distribution of large-scale Chl-a concentrations across global ocean waters.Using MODIS(Moderate Resolution Imaging Spectroradiometer)Chl-a concentration data from 2003 to 2022,this study analyzes the spatiotemporal variability and trends of the Chl-a concentrations in global oceans,and their relationships with the global sea surface temperature(SST),El Niño-Southern Oscillation(ENSO)and the Indian Ocean Dipole(IOD)are examined.The results are outlined below.(1)Spatially,the Chl-a concentrations in coastal waters are generally higher than those in offshore waters,with the lowest concentrations observed in pelagic waters(less than 0.03 mg·m-3).Seasonally,Chl-a concentrations exhibit significant variations,with nearshore waters showing more pronounced seasonal changes than pelagic waters.(2)In the open waters of the Pacific,Indian and Atlantic oceans,the trend of the Chl-a concentrations remains mildly changes.However,Chl-a concentrations show an increasing trend in the majority of nearshore waters.(3)The months with the highest Chl-a concentrations across global ocean waters vary in a band-like pattern with latitude.(4)Generally,the Chl-a concentrations exhibit significant negative correlations with SST(p＜0.05)between 40 °S and 40° N,while positive correlations are observed in other latitudes.The correlations between Chl-a concentrations and ENSO/IOD also display significant seasonal variations,indicating that ENSO and IOD have different impacts on the variations of Chl-a concentrations in different sea regions.关键词
全球海域/Chl-a浓度/MODIS/ENSO/时空变化Key words
global ocean/Chl-a concentration/MODIS/ENSO/spatiotemporal variability分类
海洋学引用本文复制引用
翁清鹏,秦泉,李峰,冯冬含,韩东枫,王晗,卢辰,刘峻成..全球海洋叶绿素a浓度时空演变及其与气候变化因子的相关分析[J].海洋气象学报,2025,45(2):118-126,9.基金项目
华东区域气象科技协同创新基金合作项目(QYHZ202307) （QYHZ202307）
山东省气象局科研项目(2022sdqxm01) （2022sdqxm01）
