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

作　　者：李晓玺[1,2] 袁金国[1,2] 刘夏菁 李志勇[3] LI Xiaoxi;YUAN Jinguo;LIU Xiajing;Li Zhiyong(College of Resource and Environmental Sciences, Hebei Normal University, Shijiazhuang 050024, China;Hebei Key Laboratory of Environment Change and Ecological Construction, Shijiazhuang 050024, China;Tourism College, Hebei Normal University, Shijiazhuang 050024, China)

机构地区：[1]河北师范大学资源与环境科学学院,河北石家庄050024 [2]河北省环境演变与生态建设省级重点实验室,河北石家庄050024 [3]河北师范大学旅游学院,河北石家庄050024

出　　处：《生态环境学报》2017年第5期785-793,共9页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(41471091);河北省自然科学基金项目(D2014205159);河北师范大学重点基金项目(130539);河北省高校重点学科建设项目

摘　　要：渤海是中国最大的内海,四周几乎被陆地包围,陆源污染严重。自上世纪90年代中后期,渤海赤潮频发,水体富营养化程度严重。以渤海为研究区,采用Eppley-VGPM垂向归纳模型及一元线性回归分析法,对2003—2016年渤海NPP的时空分布进行研究。结果表明:14年来,渤海NPP年均值存在一定波动性变化且整体呈小幅度上升趋势。NPP月均值以8月最高,为5 265 mg·m^(-2)·d^(-1),1月最低,为677 mg·m^(-2)·d^(-1)。NPP季节性变化明显,表现为夏季>秋季>春季>冬季,夏季NPP最高值出现在2010年,为5 027 mg·m^(-2)·d^(-1)。空间分布上,渤海存在四大NPP高值区,分别为辽东湾、渤海湾、莱州湾和秦皇岛邻近海域,其中莱州湾NPP数值最高。2003—2016年间NPP显著增加的海域面积占50.67%,分布在辽东湾、秦皇岛邻近海域及渤海中部海域;显著减少的海域面积占31.12%,分布在莱州湾及渤海湾;仅有0.28%的海域NPP出现极明显增加;17.93%的海域NPP并无明显变化。渤海NPP空间分布呈由近岸海域向远海岸海域逐步降低的趋势,最低值出现在渤海海峡。2003—2016年渤海海表温度无明显变化,相对稳定,海表温度年平均值为13.11℃。渤海NPP与海表温度以低度相关和负相关为主。研究结果可为渤海海域环境质量监测、渤海资源合理开发利用及环境治理提供依据。Ocean primary productivity significantly affects CO2exchange at ocean-atmospheric interface,and it is an importantparticipant in global carbon cycle,and it plays essential significance in studying global environmental change.Bohai Sea,the largestinland sea in China,almost surrounded by land,terrestrial pollution is serious.Since the1990's,the environment of Bohai Sea hasdeteriorated,red tides have occurred frequently and water eutrophication is serious.According to Eppley Vertically GeneralizedProduction Model(VGPM)inversed MODIS net primary production(NPP)data,spatiotemporal changes of NPP in Bohai Sea from2003to2016are analyzed using remote sensing and GIS technology.Results show that the annual average NPP values showed atrend of slightly increase with some fluctuation from2003to2016.The monthly average NPP values reach the maximum of5136.70mg?m-2?d-1in August,and minimum of677mg?m-2?d-1in January.The seasonal changes of NPP values are obvious.The NPP valuesare the highest in summer,lower in spring and autumn,and the lowest in winter.The highest NPP value in summer appears in2010,with a value of5022.01mg?m-2?d-1.There are four high NPP value areas in Bohai:East Liaoning Bay,Bohai Bay,Laizhou Bay andQinhuangdao Port,of which the NPP values of Laizhou Bay are the highest.The spatial distribution of NPP values in Bohai Seashows a trend of decrease from near shore to far shore areas,and the lowest NPP value appears in Bohai strait.The area of NPPsignificantly increase accounts for50.67%from2003to2016,mainly located in Liaodong bay,Qinhuangdao ocean area and themiddle of Bohai Sea.The area of significantly reduce accounts for31.12%,distributed in Laizhou bay and Bohai bay.NPP in only0.28%of area appears extremely significantly increase.The sea surface temperature in Bohai Sea does not change significantly from2003to2016,and the average sea surface temperature is13.11℃.The correlation between NPP and sea surface temperature inBohai Sea was mainly negative.The research of NPP in Bohai Sea can provide an important s

关 键 词：净初级生产力(NPP) MODIS数据 渤海 时空变化 

分 类 号：X55[环境科学与工程—环境工程] Q178.53[生物学—水生生物学]