Calculation of photosynthetically available radiation using multispectral data in the Arctic
Photosynthetically Available Radiation (PAR) is an important bio-optical parameter related to marine primary production. PAR is usually measured by a broadband sensor and can also be calculated by multispectral data. When the PAR is calculated by multispectral data in polar region, four factors are...
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ftarcticportal:oai:generic.eprints.org:2397 2023-10-09T21:44:09+02:00 Calculation of photosynthetically available radiation using multispectral data in the Arctic Jinping, Zhao Weibo, Wang Lee, Cooper 2010-12 application/pdf http://library.arcticportal.org/2397/ http://library.arcticportal.org/2397/1/A2010-011.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2397/1/A2010-011.pdf Jinping, Zhao and Weibo, Wang and Lee, Cooper (2010) Calculation of photosynthetically available radiation using multispectral data in the Arctic. Advances in Polar Science, 21 (2). pp. 113-126. Oceans Energy Article PeerReviewed 2010 ftarcticportal 2023-09-13T22:54:14Z Photosynthetically Available Radiation (PAR) is an important bio-optical parameter related to marine primary production. PAR is usually measured by a broadband sensor and can also be calculated by multispectral data. When the PAR is calculated by multispectral data in polar region, four factors are possible error sources. PAR could be overestimated as the wavelengths of multispectral instrument are usually chosen to evade main absorption zones of atmosphere. However, both PARs calculated by hyperspectral and multispectral data are consistent with an error less than 1%. By the fitting function proposed here, the PAR calculated by multispectral data could attain the same accuracy with that by hyperspectral data. To calculate the attenuation rate of the PAR needs PAR0, the PAR just under the surface. Here, an approach is proposed to calculate PAR0 by the best fit of their radiance profile of 1-5m with a content attenuation coefficient under surface. It is demonstrated by theory and observed data in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation. But under sea ice, the attenuation coefficient of PAR is a little bit different, as the spectrum of the light has been changed by selective absorption by the sea ice. Therefore, the difference of inclusions inside the sea ice will result in different PAR, and impact on the attenuation of PAR. By the results of this paper, PAR can be calculated reliably by multispectral data. Article in Journal/Newspaper Advances in Polar Science Arctic Arctic Polar Science Polar Science Sea ice Arctic Portal Library Arctic |
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Arctic Portal Library |
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English |
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Oceans Energy |
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Oceans Energy Jinping, Zhao Weibo, Wang Lee, Cooper Calculation of photosynthetically available radiation using multispectral data in the Arctic |
topic_facet |
Oceans Energy |
description |
Photosynthetically Available Radiation (PAR) is an important bio-optical parameter related to marine primary production. PAR is usually measured by a broadband sensor and can also be calculated by multispectral data. When the PAR is calculated by multispectral data in polar region, four factors are possible error sources. PAR could be overestimated as the wavelengths of multispectral instrument are usually chosen to evade main absorption zones of atmosphere. However, both PARs calculated by hyperspectral and multispectral data are consistent with an error less than 1%. By the fitting function proposed here, the PAR calculated by multispectral data could attain the same accuracy with that by hyperspectral data. To calculate the attenuation rate of the PAR needs PAR0, the PAR just under the surface. Here, an approach is proposed to calculate PAR0 by the best fit of their radiance profile of 1-5m with a content attenuation coefficient under surface. It is demonstrated by theory and observed data in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation. But under sea ice, the attenuation coefficient of PAR is a little bit different, as the spectrum of the light has been changed by selective absorption by the sea ice. Therefore, the difference of inclusions inside the sea ice will result in different PAR, and impact on the attenuation of PAR. By the results of this paper, PAR can be calculated reliably by multispectral data. |
format |
Article in Journal/Newspaper |
author |
Jinping, Zhao Weibo, Wang Lee, Cooper |
author_facet |
Jinping, Zhao Weibo, Wang Lee, Cooper |
author_sort |
Jinping, Zhao |
title |
Calculation of photosynthetically available radiation using multispectral data in the Arctic |
title_short |
Calculation of photosynthetically available radiation using multispectral data in the Arctic |
title_full |
Calculation of photosynthetically available radiation using multispectral data in the Arctic |
title_fullStr |
Calculation of photosynthetically available radiation using multispectral data in the Arctic |
title_full_unstemmed |
Calculation of photosynthetically available radiation using multispectral data in the Arctic |
title_sort |
calculation of photosynthetically available radiation using multispectral data in the arctic |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2010 |
url |
http://library.arcticportal.org/2397/ http://library.arcticportal.org/2397/1/A2010-011.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Advances in Polar Science Arctic Arctic Polar Science Polar Science Sea ice |
genre_facet |
Advances in Polar Science Arctic Arctic Polar Science Polar Science Sea ice |
op_relation |
http://library.arcticportal.org/2397/1/A2010-011.pdf Jinping, Zhao and Weibo, Wang and Lee, Cooper (2010) Calculation of photosynthetically available radiation using multispectral data in the Arctic. Advances in Polar Science, 21 (2). pp. 113-126. |
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1779318176942653440 |