ENSO对南海北部初级生产力的影响

The Influence of ENSO on Primary Productivity in the Northern South China Sea

利用2002年7月至2014年12月的卫星遥感数据,研究ENSO期间我国南海北部的海表温度(SST)、风场等环境场变化特征,并探讨其对南海北部初级生产力的影响。结果表明,El Ni?o/La Ni?a期间南海北部初级生产力较正常年份变化显著,很大程度上受到ENSO的调控,其变化与风场、SST等的分布变化密切相关。具体趋势:厄尔尼诺年的冬季风期间,南海北部海域风场强度减小,沿岸海域SST升高,初级生产力降低,南海东北部海域SST降低,初级生产力升高,整个海域的总初级生产力与MEI指数呈负相关关系;拉尼娜年的冬季风期间,相应海域的风场、SST和初级生产力的变化则与厄尔尼诺期间的相反,整个海域的总初级生产力与MEI指数呈正相关关系。

The variation of SST, wind and primary productivity were studied using remote sensing data from 2004 to 2014 in the northern South China Sea. And then the relationships between ENSO and climate/environmental factors were investigated. Results showed that the primary productivity had anomalous change and was closely related to ENSO, wind and SST during El Ni?o/La Ni?a in the study area. The tendency was as follows. During Northeast monsoon season in El Ni?o, wind strength decreased in the whole area, the SST increased and the primary productivity deceased in the coastal area,but the SST deceased and the primary productivity in the northeast area. The primary productivity andMEI index showed negative correlation. On the contrary, the change of primary productivity, wind and SST showed the opposite phenomenon in the Northeast monsoon season during La Ni?a in the corresponding area in the northern South China Sea.