| Gustavo Souto Fontes Molleri,Milton Kampel,Evlyn Márcia Leão de Moraes Novo. 2010. Spectral classification of water masses under the influence of the Amazon River plume. Acta Oceanologica Sinica, (3):1－8 |
| Spectral classification of water masses under the influence of the Amazon River plume |
| Spectral classification of water masses under the influence of the Amazon River plume |
| Received:July 15, 2009 Revised:December 06, 2009 |
| DOI：10.1007/s13131-010-0031-1 |
| Key words:ocean color remote sensing amazon river plume spectral behavior cluster analysis |
| 中文关键词: ocean color remote sensing amazon river plume spectral behavior cluster analysis |
| 基金项目: |
| Author Name | Affiliation | E-mail | | Gustavo Souto Fontes Molleri | National Institute for Space Research-INPE, Remote Sensing Division, Sã
o José
dos Campos, SP, 12227010, Brazil | molleri@dsr.inpe.br | | Milton Kampel | National Institute for Space Research-INPE, Remote Sensing Division, Sã
o José
dos Campos, SP, 12227010, Brazil | | | Evlyn Márcia Leão de Moraes Novo | National Institute for Space Research-INPE, Remote Sensing Division, Sã
o José
dos Campos, SP, 12227010, Brazil | |
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| Abstract: |
| The large amount of dissolved and particulate material discharged by the Amazon River into the Equatorial Atlantic Ocean cause distinct spectral response of its waters as compared to the nearby ocean waters. This paper shows the application of K-means clustering algorithm for classifying water masses in the region under the Amazon River plume influence according to their spectral behavior. Salinity and temperature data from 67 oceanographic stations were related to Sea-viewing Wide Field-of-view Sensor (SeaWiFS) remote sensing reflectances values and the following bio-optical products:(i) chlorophyll-a concentration, (ii) water attenuation coefficient and (iii) absorption coefficient for dissolved and detrital material. Four different water masses were identified such as:(1) oceanic water, (2) intermediate oceanic water, (3) intermediate river plume water and (4) Amazon River plume water. The spectral behavior of these water masses allowed concluding that the main active optical component of the waters in the region is the colored dissolved organic matter originated mostly from the Amazon River. |
| 中文摘要: |
| The large amount of dissolved and particulate material discharged by the Amazon River into the Equatorial Atlantic Ocean cause distinct spectral response of its waters as compared to the nearby ocean waters. This paper shows the application of K-means clustering algorithm for classifying water masses in the region under the Amazon River plume influence according to their spectral behavior. Salinity and temperature data from 67 oceanographic stations were related to Sea-viewing Wide Field-of-view Sensor (SeaWiFS) remote sensing reflectances values and the following bio-optical products:(i) chlorophyll-a concentration, (ii) water attenuation coefficient and (iii) absorption coefficient for dissolved and detrital material. Four different water masses were identified such as:(1) oceanic water, (2) intermediate oceanic water, (3) intermediate river plume water and (4) Amazon River plume water. The spectral behavior of these water masses allowed concluding that the main active optical component of the waters in the region is the colored dissolved organic matter originated mostly from the Amazon River. |
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