Academic Journal
Underway spectrophotometry in the Fram Strait (European Arctic Ocean): a highly resolved chlorophyll a data source for complementing satellite ocean color
| Title: | Underway spectrophotometry in the Fram Strait (European Arctic Ocean): a highly resolved chlorophyll a data source for complementing satellite ocean color |
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| Authors: | Liu, Yangyang, Röttgers, Rüdiger, Ramírez-Pérez, Marta, Dinter, Tilman, Steinmetz, François, Nöthig, Eva-Maria, Hellmann, Sebastian, Wiegmann, Sonja, Bracher, A. |
| Contributors: | German Research Foundation, China Scholarship Council, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (Germany) |
| Publisher Information: | Optical Society of America |
| Publication Year: | 2018 |
| Collection: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| Description: | 19 pages, 5 figures, 3 tables ; Satellite remote sensing of chlorophyll a concentration (Chl-a) in the Arctic Ocean is spatially and temporally limited and needs to be supplemented and validated with substantial volumes of in situ observations. Here, we evaluated the capability of obtaining highly resolved in situ surface Chl-a using underway spectrophotometry operated during two summer cruises in 2015 and 2016 in the Fram Strait. Results showed that Chl-a measured using high pressure liquid chromatography (HPLC) was well related (R = 0.90) to the collocated particulate absorption line height at 676 nm obtained from the underway spectrophotometry system. This enabled continuous surface Chl-a estimation along the cruise tracks. When used to validate Chl-a operational products as well as to assess the Chl-a algorithms of the aqua moderate resolution imaging spectroradiometer (MODIS-A) and Sentinel-3 Ocean Land Color Imager (OLCI) Level 2 Chl-a operational products, and from OLCI Level 2 products processed with Polymer atmospheric correction algorithm (version 4.1), the underway spectrophotometry based Chl-a data sets proved to be a much more sufficient data source by generating over one order of magnitude more match-ups than those obtained from discrete water samples. Overall, the band ratio (OCI, OC4) Chl-a operational products from MODIS-A and OLCI as well as OLCI C2RCC products showed acceptable results. The OLCI Polymer standard output provided the most reliable Chl-a estimates, and nearly as good results were obtained from the OCI algorithm with Polymer atmospheric correction method. This work confirms the great advantage of the underway spectrophotometry in enlarging in situ Chl-a data sets for the Fram Strait and improving satellite Chl-a validation and Chl-a algorithm assessment over discrete water sample analysis in the laboratory. ; FRontiers in Arctic marine Monitoring (FRAM) project of Helmholtz Association Infrastructure Programme; Transregional Collaborative Research Center (TR 172) “ArctiC ... |
| Document Type: | article in journal/newspaper |
| Language: | English |
| Relation: | Publisher's version; https://doi.org/10.1364/OE.26.00A678; Sí; e-issn: 1094-4087; Optics Express 26(14): A678- A696 (2018); http://hdl.handle.net/10261/175014; http://dx.doi.org/10.13039/501100001659; http://dx.doi.org/10.13039/501100003207; http://dx.doi.org/10.13039/501100004543 |
| DOI: | 10.1364/OE.26.00A678 |
| DOI: | 10.13039/501100001659 |
| DOI: | 10.13039/501100003207 |
| DOI: | 10.13039/501100004543 |
| Availability: | https://doi.org/10.1364/OE.26.00A678 https://doi.org/10.13039/501100001659 https://doi.org/10.13039/501100003207 https://doi.org/10.13039/501100004543 http://hdl.handle.net/10261/175014 |
| Rights: | openAccess ; https://www.osapublishing.org/submit/review/copyright_permissions.cfm#posting |
| Accession Number: | edsbas.83ACB601 |
| Database: | BASE |
| Description not available. |