中文摘要：

基于1998-2013年SeaWiFS和MODIS传感器的叶绿素浓度资料，本文分析了夏季南海西部叶绿素浓度高值带的年际变化规律。夏季，叶绿素及营养盐在海流的作用下离岸输送，从而在南海西部形成叶绿素浓度高值带，其分布与东向急流的流向一致。分析结果显示，高值带分布主要受13°N以南海域风场的调控，且滞后风场1周。当13°N以南海域受异常东北风（西南风）控制时，高值带位于其多年平均位置以北（南）。

英文摘要：

Based on the SeaWiFS and MODIS chlorophyll a （Chl a） concentration data from 1998 to 2013, the interannual variability of the high Chl a concentration strip in the western South China Sea（SCS） during summer is investigated. In summer,under the effect of the eastward current, the Chl a and the nutrients are advected offshore into the open SCS, which contributes to forming the high Chl a concentration strip, whose distribution pattern seems in accord with the direction of the eastward current. Our analysis shows that in the study region,monsoon in the south of 13°N plays a significant role in determining the distribution of the chlorophyll with 1 week delay, and the interannual variability of wind anomaly results in the variability of the high chlorophyll concentration strip. When the area is controlled by anomalous northeast （southwest） monsoon, the strip moves northward （southward）.