基于Aqua/MODIS数据研究黄海暖流的强度及其时空变化  

Study on the intensity and temporal and spatial variation of Yellow Sea Warm Current based on Aqua/MODIS data

作　　者：曹友华 朱乾坤 CAO You-hua;ZHU Qian-kun(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306 China;State Key Laboratory of Satellite Ocean Environment Dynamics,the Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012 China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]自然资源部第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012

出　　处：《海洋预报》2021年第6期93-102,共10页Marine Forecasts

基　　金：国家重点研发计划(2017YFA0603004)。

摘　　要：基于Aqua卫星的中分辨率成像光谱仪获取2003—2019年的海表温度遥感数据,利用各月的特征等温线表征黄海暖舌,研究黄海暖流的强度和时空变化,探讨黄海暖流的年际变化对ENSO事件的响应。结果表明:月际变化中,黄海暖流只出现在11月—翌年4月,其余月份不存在,1月黄海暖流的强度和势力最大,影响最北可至38.83°N;年际变化中,区域A(34°~36°N,123°~126°E)的平均温度和黄海暖流7℃等温线到达的最北位置密切相关,相关系数r=0.8362(p<0.05),两者均可用于分析黄海暖流强度的年际变化,线性关系N=0.7596T+30.3618,即区域A的平均海表温度可以很好地预测1—3月黄海暖流影响的最北位置;黄海暖流的年际变化可能受ENSO事件的影响,且受拉尼娜事件的影响更为明显。Based on the remote sensing data of Sea Surface Temperature(SST)from 2003 to 2019 obtained by the MODerate resolution Imaging Spectroradiometer(MODIS)of Aqua satellite,this paper analyzes the intensity and temporal and spatial variations of the Yellow Sea Warm Current(YSWC)and discusses the response of its annual variation to ENSO events using monthly characteristic isotherms to indicate the warm tongue of the Yellow Sea.The results show that the YSWC only appears between November and April of the following year with the maximum intensity in January and the influence reaching as far as 38.83°N.In terms of interannual variation,the average SST of area A(34°~36°N,123°~126°E)is closely related to the northernmost position of 7℃isotherm of the YWSC with a correlation coefficient of 0.8362(P<0.05),which can be used to analyze of interannual intensity variability of the YSWC.The northernmost position affected by Yellow Sea Warm Current from January to March can be well predicted by using the linear relationship N=0.7596T+30.3618 and the average SST of region A.The interannual variation of the YSWC might be influenced by ENSO events and is more significantly affected by La Nina events.

关 键 词：MODIS 海表温度 黄海暖流 强度 时空变化 

分 类 号：P731.21[天文地球—海洋科学]