Correlation of Asian dust with chlorophyll and primary productivity in the coastal seas of China during the period from 1998 to 2008
Correlation of Asian dust with chlorophyll and primary productivity in the coastal seas of China during the period from 1998 to 2008
复制标题
1998-2008年亚洲沙尘与中国近海叶绿素及初级生产力的相关性
DOI：
10.1029/2010jg001456
复制
发表时间：
2011-06-30
影响因子：
3.7
通讯作者：
Yao, Xiaohong
中科院分区：
文献类型：
--
作者：
Tan, Sai-Chun;Shi, Guang-Yu;Yao, Xiaohong
利用1998-2008年中国近海叶绿素a卫星浓度和初级生产力估算值与亚洲沙尘暴事件进行相关分析。沙尘事件是通过两种方法确定的，即，历史记录和卫星气溶胶指数（AI）。在黄海南部和东海，重度和极重度沙尘天气与叶绿素a浓度和初级生产力有较好的正相关关系，而在渤海和黄海北部，相关性不显著。在南黄海，Chl a浓度和初级生产力在16次沙尘暴发生后1-21天增加并最终开花。格兰杰因果关系检验表明，黄海初级生产力与AI、光合有效辐射（PAR）和海表温度（SST）的格兰杰因果关系密切，表明上述3个变量的历史值包含了初级生产力当前值的统计学意义信息。采用逐步多元线性回归分析这三个因素的相对重要性。北黄海初级生产力的变化主要由PAR和SST决定，而AI的作用不大。在南黄海，PAR和AI占了所有风暴的初级生产力的变化的大部分;此外，春季藻华是由于在5公里）的沙尘输送，主要来自塔克拉玛干沙漠，蒙古，和/或内蒙古西部，没有影响。
Satellite chlorophyll a (Chl a) concentrations and estimated primary production in the coastal seas of China were correlated with Asian dust events during 1998-2008. Dust events were identified using two approaches, i.e., historical record and satellite aerosol index (AI). Severe and very severe dust events correlated well and positively with Chl a concentrations and primary production in the south Yellow Sea and East China Sea, but it was not statistically significant in the Bohai Sea and the north Yellow Sea. In the south Yellow Sea, Chl a concentration and primary production increased and eventually bloomed 1-21 days after the occurrence of the 16 out of 22 dust storms. Granger causality test showed that AI, photosynthetically available radiation (PAR) and sea surface temperature (SST) did Granger cause primary production in the Yellow Sea, suggesting that past values of the above three variables contain statistically meaningful information about current values of primary production. A stepwise multiple linear regression was used to examine the relative importance of the three factors. PAR and SST accounted for most of the variability of primary production in the north Yellow Sea, while AI was not quite as useful. In the south Yellow Sea, PAR and AI accounted for most of the variability of primary production for all storms; in addition, spring algae blooms were due to dust particles transported in the 5 km) dusts, originated mainly from the Taklimakan Desert, Mongolia, and/or west of Inner Mongolia, had no impact.