生态环境学报2017，Vol.26Issue(5)：785-793,9.DOI:10.16258/j.cnki.1674-5906.2017.05.009
基于MODIS数据的渤海净初级生产力时空变化
Study on Spatiotemporal Changes of Net Primary Productivity in Bohai Sea Using MODIS Data
摘要
Abstract
Ocean primary productivity significantly affects CO2 exchange at ocean-atmospheric interface, and it is an important participant in global carbon cycle, and it plays essential significance in studying global environmental change. Bohai Sea, the largest inland sea in China, almost surrounded by land, terrestrial pollution is serious. Since the 1990's, the environment of Bohai Sea has deteriorated, red tides have occurred frequently and water eutrophication is serious. According to Eppley Vertically Generalized Production Model (VGPM) inversed MODIS net primary production (NPP) data, spatiotemporal changes of NPP in Bohai Sea from 2003 to 2016 are analyzed using remote sensing and GIS technology. Results show that the annual average NPP values showed a trend of slightly increase with some fluctuation from 2003 to 2016. The monthly average NPP values reach the maximum of 5136.70 mg·m-2·d-1 in August, and minimum of 677 mg·m-2·d-1 in January. The seasonal changes of NPP values are obvious. The NPP values are the highest in summer, lower in spring and autumn, and the lowest in winter. The highest NPP value in summer appears in 2010, with a value of 5022.01 mg·m-2·d-1.There are four high NPP value areas in Bohai: East Liaoning Bay, Bohai Bay, Laizhou Bay and Qinhuangdao Port, of which the NPP values of Laizhou Bay are the highest. The spatial distribution of NPP values in Bohai Sea shows a trend of decrease from near shore to far shore areas, and the lowest NPP value appears in Bohai strait. The area of NPP significantly increase accounts for 50.67% from 2003 to 2016, mainly located in Liaodong bay, Qinhuangdao ocean area and the middle of Bohai Sea. The area of significantly reduce accounts for 31.12%, distributed in Laizhou bay and Bohai bay. NPP in only 0.28% of area appears extremely significantly increase. The sea surface temperature in Bohai Sea does not change significantly from 2003 to 2016, and the average sea surface temperature is 13.11 ℃. The correlation between NPP and sea surface temperature in Bohai Sea was mainly negative. The research of NPP in Bohai Sea can provide an important scientific basis for the environment monitoring and oceanic resources development.关键词
净初级生产力(NPP)/MODIS数据/渤海/时空变化Key words
net primary production (NPP)/MODIS data/Bohai Sea/spatiotemporal change分类
资源环境引用本文复制引用
李晓玺,袁金国,刘夏菁,李志勇..基于MODIS数据的渤海净初级生产力时空变化[J].生态环境学报,2017,26(5):785-793,9.基金项目
国家自然科学基金项目(41471091) （41471091）
河北省自然科学基金项目(D2014205159) （D2014205159）
河北师范大学重点基金项目(130539) （130539）
河北省高校重点学科建设项目 （）
