全球海洋初级生产力与海洋环境要素时空关联模式挖掘分析

全球海洋初级生产力在海洋环境要素的驱动下呈现不同的时空分布特征，但在不同的海域两者之间的关联模式并不清晰。本文从地理时空规则挖掘的角度，利用1998年1月—2016年12月之间的序列多源遥感产品数据，探讨了全球海洋初级生产力和海洋表面温度、海面高度异常、海面降雨、混合层深度和ENSO（El Ni?o-Southern Oscillation）事件的时空关联模式。研究结果表明:1）在西赤道太平洋，海面高度异常降低、海面降雨异常降低和混合层深度异常升高会提升真光层营养盐供应，致使海洋初级生产力的异常升高。2）在中赤道太平洋，海面高度异常升高、海面降雨异常升高和混合层深度异常降低会抑制真光层营养盐供应，致使海洋初级生产力的异常降低。3）在东赤道太平洋，海面高度异常升高和海面降雨异常升高会抑制真光层营养盐供应、混合层深度异常升高降低了铁元素含量，从而导致海洋初级生产力的异常降低。4）在南太平洋，浮游植物丰度与营养盐呈负相关，海洋表面温度异常升高/异常降低会提升/抑制微生物光合作用效率、海面高度的异常升高/异常降低会抑制/提升真光层营养盐供应，致使海洋初级生产力的异常升高/异常降低。5）厄尔尼诺事件相较于拉尼娜事件更容易引起海洋初级生产力的异常变化。

Spatiotemporal association patterns between marine net primary production and environmental parameters in a view of data mining

Global marine net primary production (NPP) shows different spatiotemporal distributions driven by marine environmental parameters, however, the spatiotemporal association patterns among the marine environmental parameters and NPP are still unclear.Thus, this paper explores the spatiotemporal association patterns among NPP and sea surface temperature (SST), sea level anomalies (SLA), sea surface precipitation (SSP), mixed layer depth (MLD), El Ni?o-Southern Oscillation (ENSO) events, using the remote sensing products covering a 19-year period from Jan 1998 to Dec 2016.The main results are as followings:1) In the western equatorial Pacific Ocean (PO), an abnormal decrease of SLA, an abnormal decrease of SSP, or an abnormal increase of MLD increases the supply of nutrients to phytoplankton in the euphotic zone, which results in an abnormal increase of NPP.2) In the middle equatorial PO, an abnormal increase of SLA, an abnormal increase of SSP or an abnormal decrease of MLD reduces the supply of nutrients to phytoplankton in the euphotic zone, which results in an abnormal decrease of NPP.3) In the eastern equatorial PO, an abnormal increase of SLA or an abnormal increase of SSP reduces the supply of nutrients, and an abnormal increase of MLD lower the micronutrient iron in the surface oceans, all of them could lead to an abnormal decrease of NPP.4) In the south PO, the abundance of phytoplankton cell is a negative correlation with the nutrition concentration, thus, an abnormal increase/decrease of SST could improve/reduce the photosynthetic efficiency of phytoplankton, an abnormal increase/decrease of SLA reduces/ improves the supply of nutrients to phytoplankton, and those abnormal changes causes an abnormal increase/decrease of NPP.5) El Ni?o events are more likely to result in the anomalous variations of NPP compared to the La Ni?a events.