An improved MODIS standard chlorophyll-a algorithm for Malacca Straits Water

8th International Symposium of the Digital Earth

地球科学;计算机科学

Lah, N.Z. Ab^1 ; Reba, M.N.M.^1 ; Siswanto, Eko^2

Institute of Geospatial Science and Technology (INSTeG), UniversitiTeknologi Malaysia, 81300 Skudai, Johor, Malaysia^1

Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15, Natsushima-cho, Yokosuka-city, Kanagawa, 237-0061, Japan^2

关键词: Chlorophyll a;    Fourth order polynomial;    High productivity;    Iterative regression;    Malacca Strait;    Moderate resolution imaging spectroradiometer;    Primary production;    Statistical performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/18/1/012113/pdf
DOI  :  10.1088/1755-1315/18/1/012113

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The Malacca Straits has high productivity of nutrients as a result to potential primary production. Yet, the Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua has shown an overestimation of Chl-a retrieval in the case-2 water of Malacca Straits. In an update to the previous study, this paper presents the second validation exercise of MODIS OC3M algorithm using the reprocessed MODIS data (R2013) and locally tuned the algorithm with respect to two in-sit stations located at northern and southern part of Malacca Straits. The result shows the OC3M retrieved in the case-2 (south station) water remarkably overestimated in-situ Chl-a, but it is underestimated in the case-1 (north station). Local tuning was employed by iterative regression at the fourth-order polynomial to improve the accuracy of Chl-a retrieval. As a result, locally tuned OC3M algorithm give robust statistical performance and can be applied best for both case-1 and case-2 water in Malacca Straits.