Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea
The data of the sea reflectance coefficient were obtained during the cruise of the R/V “Akademik Ioffe” (10 August–8 September 2021) in the Kara Sea beyond the Arctic Circle. A total of 28 measurements of sea reflectance were performed in different conditions ranging from estuarine zones to open oce...
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2022
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ftdoajarticles:oai:doaj.org/article:e5504baba62c44de8864e0c8e6e7b35a 2023-05-15T15:10:44+02:00 Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea Elena Korchemkina Dmitriy Deryagin Mariia Pavlova Anna Kostyleva Igor E. Kozlov Svetlana Vazyulya 2022-10-01T00:00:00Z https://doi.org/10.3390/jmse10111587 https://doaj.org/article/e5504baba62c44de8864e0c8e6e7b35a EN eng MDPI AG https://www.mdpi.com/2077-1312/10/11/1587 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10111587 2077-1312 https://doaj.org/article/e5504baba62c44de8864e0c8e6e7b35a Journal of Marine Science and Engineering, Vol 10, Iss 1587, p 1587 (2022) remote sensed reflectance OC4 GIOP OLCI MODIS VIIRS Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.3390/jmse10111587 2022-12-30T20:13:25Z The data of the sea reflectance coefficient were obtained during the cruise of the R/V “Akademik Ioffe” (10 August–8 September 2021) in the Kara Sea beyond the Arctic Circle. A total of 28 measurements of sea reflectance were performed in different conditions ranging from estuarine zones to open ocean. In addition, at 10 stations, water samples were taken, and chlorophyll-a concentrations were determined using the fluorometric method. In situ reflectance data were compared to satellite data (MODIS Aqua/Terra, Sentinel OLCI 3A/B, VIIRS SNPP) obtained within 24 h before and after the measurement. It was shown that, in general, an overestimation of remote sensing reflectance is observed in short-wave channels (412, 443, 469 nm for MODIS; 410, 412.5, 442.5 for OLCI) and underestimation in long-wave channels (708.75, 753.75 nm for OLCI). The obtained in situ chlorophyll-a concentrations were compared with the results of standard models (GIOP, OC2, OC3, OC4), and regional algorithms (semi-analytical MHI, empirical K17) were applied to the in situ and remotely sensed reflectances. In the cases of GIOP and OC4, unrealistic concentrations of chlorophyll-a were obtained. Regional algorithms developed earlier, specifically for the Kara Sea, showed good correlation (0.6 and 0.76) with in situ measurements. Despite the approximately 20% overestimation of chlorophyll-a by both regional algorithms, they can be used to obtain chlorophyll-a concentrations in the Kara Sea in a concentration range of <1 mg/m 3 . Article in Journal/Newspaper Arctic Kara Sea Directory of Open Access Journals: DOAJ Articles Arctic Kara Sea Journal of Marine Science and Engineering 10 11 1587 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
remote sensed reflectance OC4 GIOP OLCI MODIS VIIRS Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
spellingShingle |
remote sensed reflectance OC4 GIOP OLCI MODIS VIIRS Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Elena Korchemkina Dmitriy Deryagin Mariia Pavlova Anna Kostyleva Igor E. Kozlov Svetlana Vazyulya Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
topic_facet |
remote sensed reflectance OC4 GIOP OLCI MODIS VIIRS Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
The data of the sea reflectance coefficient were obtained during the cruise of the R/V “Akademik Ioffe” (10 August–8 September 2021) in the Kara Sea beyond the Arctic Circle. A total of 28 measurements of sea reflectance were performed in different conditions ranging from estuarine zones to open ocean. In addition, at 10 stations, water samples were taken, and chlorophyll-a concentrations were determined using the fluorometric method. In situ reflectance data were compared to satellite data (MODIS Aqua/Terra, Sentinel OLCI 3A/B, VIIRS SNPP) obtained within 24 h before and after the measurement. It was shown that, in general, an overestimation of remote sensing reflectance is observed in short-wave channels (412, 443, 469 nm for MODIS; 410, 412.5, 442.5 for OLCI) and underestimation in long-wave channels (708.75, 753.75 nm for OLCI). The obtained in situ chlorophyll-a concentrations were compared with the results of standard models (GIOP, OC2, OC3, OC4), and regional algorithms (semi-analytical MHI, empirical K17) were applied to the in situ and remotely sensed reflectances. In the cases of GIOP and OC4, unrealistic concentrations of chlorophyll-a were obtained. Regional algorithms developed earlier, specifically for the Kara Sea, showed good correlation (0.6 and 0.76) with in situ measurements. Despite the approximately 20% overestimation of chlorophyll-a by both regional algorithms, they can be used to obtain chlorophyll-a concentrations in the Kara Sea in a concentration range of <1 mg/m 3 . |
format |
Article in Journal/Newspaper |
author |
Elena Korchemkina Dmitriy Deryagin Mariia Pavlova Anna Kostyleva Igor E. Kozlov Svetlana Vazyulya |
author_facet |
Elena Korchemkina Dmitriy Deryagin Mariia Pavlova Anna Kostyleva Igor E. Kozlov Svetlana Vazyulya |
author_sort |
Elena Korchemkina |
title |
Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
title_short |
Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
title_full |
Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
title_fullStr |
Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
title_full_unstemmed |
Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea |
title_sort |
advantage of regional algorithms for the chlorophyll-a concentration retrieval from in situ optical measurements in the kara sea |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10111587 https://doaj.org/article/e5504baba62c44de8864e0c8e6e7b35a |
geographic |
Arctic Kara Sea |
geographic_facet |
Arctic Kara Sea |
genre |
Arctic Kara Sea |
genre_facet |
Arctic Kara Sea |
op_source |
Journal of Marine Science and Engineering, Vol 10, Iss 1587, p 1587 (2022) |
op_relation |
https://www.mdpi.com/2077-1312/10/11/1587 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10111587 2077-1312 https://doaj.org/article/e5504baba62c44de8864e0c8e6e7b35a |
op_doi |
https://doi.org/10.3390/jmse10111587 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
11 |
container_start_page |
1587 |
_version_ |
1766341702137675776 |