Application of MODIS on monitoring dissolved inorganic nitrogen and dissolved inorganic phosphorus in Haizhou Gulf
Red tides have been increasingly observed in the gulf of Haizhou and considered a serious environmental problem from the beginning of the new century.Eutrophication of water is an important reason of red tide occurrence.This paper used the observation data of the concentration of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) in Haizhou Gulf from 2004 to 2006 and selected synchronous MODIS Terra 1B data with 500m spatial resolution in this period of time.We established factors with single band and multi-bands,and then calculated the correlation of each factor with DIN concentration,DIP concentration,and their logarithm respectively.The factors with stronger correlation were used to establish regression models of DIN and DIPs concentration.After comparing these models,we chose the linear model of DIN concentration established by factor ) 4 ,3 ( 11 F and inverse model of the logarithm of DIP concentration established by factor ) 5 ,6 ( 7 F as their final regression model.The relative accuracy of DIN concentration model achieved about 70％;the retrieving results of DIN concentration were consistent well with real conditions.The relative accuracy of the logarithm of DIP concentration achieved about 90％.The results prove the feasibility of monitoring DIN concentration and the exponential order of DIP concentration in offshore of Jiangsu Province.
Dissolved inorganic nitrogen (DIN) dissolved inorganic phosphorus (DIP) MODIS Haizhou Gulf
Yong Xu Ying Zhang Dong Zhang Jitang Liu
College of Geography,Nanjing Normal University,Nanjing,China,210046;Urban and Resource Environment I College of Geography,Nanjing Normal University,Nanjing,China,210046 Ocean Environmental Monitoring Station of State Oceanic Administration,Lian yungang,China,222042
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）