Similarities and Differences of Oceanic Primary Productivity Product Estimated by Three Models Based on MODIS for the Open South China Sea
| Autor: | Shi-jian Ji, Weifeng Zhou, Anzhou Li, Hongyun Xu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Ecology Primary production Global change Inversion (meteorology) Seasonality medicine.disease 01 natural sciences 010601 ecology Climatology medicine Environmental science Submarine pipeline Data pre-processing Oceanic carbon cycle Cropping 0105 earth and related environmental sciences |
| Zdroj: | Communications in Computer and Information Science ISBN: 9789811039652 GRMSE (1) |
| Popis: | It’s critical to carry out comparison among remotely sensed data products and choose appropriate oceanic primary productivity product to apply to evaluation of fishery resources, ocean carbon cycle and global change research. This paper mainly gives an intercomparison of three ocean net primary productivity (NPP) products for the open South China Sea (SCS) estimated by Standard VGPM, Eppley-VGPM and CbPM models from MODIS. Data preprocessing and intercomparison work including image reading, cropping, invalid values removing and calculating average were solved by MATLAB. There are significant differences among the annual ocean NPP averages estimated by the three models within one year. The differences of seasonal variation among the three products are different, the values estimated by Standard-VGPM are highest in winter and lowest in spring. The ocean NPP values estimated by the three models are all highest in 23°N. The NPP values are high in shallow offshore area and then decreasing with the increasing distance away from the coast, and the maximum and the minimum values of the three models are different. According to previous researches, NPP products estimated by Standard-VGPM compared with other two models are more suitable as the application data in the open SCS. In general, it’s necessary to consider and improve the precision problem of the ocean NPP estimated by the algorithms based on inversion data from remote sensing. |
| Databáze: | OpenAIRE |
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