Thirteen-year satellite-derived data are used to investigate the temporal variability of net primary production （NPP） in the Oman upwelling zone and its potential forcing mechanisms. The NPP in the Oman upwelling zo...Thirteen-year satellite-derived data are used to investigate the temporal variability of net primary production （NPP） in the Oman upwelling zone and its potential forcing mechanisms. The NPP in the Oman upwelling zone is characterized by an abnormal decrease during E1 Nifio events. Such an NPP decrease may be related to E1 Nifio-driven anomalous summertime weak wind. During the summer following E1 Nifio, the anomalous northeasterly wind forced by southwest Indian Ocean warming weakens the southwest monsoon and warms the Arabian Sea. The abnormal wind weakens the coastal Ekman transport, offshore Ekman pumping and horizontal advection, resulting in reduced upward nutrient supply to the euphotic zone. A slightly declining trend in NPP after 2000 associated with a gradual decrease in surface monsoon winds is discussed.展开更多
基金International Partnership Program of Chinese Acadewy of Sciences No. 1331551KYSB20160002 the Strategic Priority Research Program of Chinese Academy of Sciences under contract No. XDA20060502+1 种基金the National Natural Science Foundation of China under contract Nos.41676013,41521005,41731173the Independent Research Project Program of State Key Laboratory of Tropical Oceanography under contract No. LTOZZ1702~~
基金Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (Nos. KZCX2-YW-Q11-02, LYQY200807)the National Natural Science Foundation of China (Nos. 40876093, 41176162)
文摘Thirteen-year satellite-derived data are used to investigate the temporal variability of net primary production （NPP） in the Oman upwelling zone and its potential forcing mechanisms. The NPP in the Oman upwelling zone is characterized by an abnormal decrease during E1 Nifio events. Such an NPP decrease may be related to E1 Nifio-driven anomalous summertime weak wind. During the summer following E1 Nifio, the anomalous northeasterly wind forced by southwest Indian Ocean warming weakens the southwest monsoon and warms the Arabian Sea. The abnormal wind weakens the coastal Ekman transport, offshore Ekman pumping and horizontal advection, resulting in reduced upward nutrient supply to the euphotic zone. A slightly declining trend in NPP after 2000 associated with a gradual decrease in surface monsoon winds is discussed.
