7246d837-004e-4f6e-9c6c-268533ef78aa eng; CAN Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca 2022-04-08T13:00:27 North American Profile of ISO 19115:2003 2009-01-01 https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=9819 Phytoplankton light absorption properties in Southern Beaufort Sea and the Amundsen Gulf 2010-02-01 Atsushi Matsuoka Hiroshi Hattori Michel Poulin Pierre Larouche Warwick Vincent Matsuoka, A., Larouche, P., Poulin, M., Vincent, W. and Hattori, H. 2009. Phytoplankton community adaptation to changing light levels in the southern Beaufort Sea, Canadian Arctic, Estuarine, Coastal and Shelf Sciences 82: 537-546. Field observations were made in the southern Beaufort Sea and the Amundsen Gulf as part of CASES 2003 expedition. Samples were collected during the first two legs of the expedition from 13 September to 14 October 2003 (open water) and from 15 October to 25 November 2003 (newly formed sea ice) onboard the Canadian icebreaker CCGS Amundsen. Temperature and salinity profiles were obtained using a SeaBird 911 Conductivity¿Temperature¿Depth (CTD) probe. Nutrient concentrations (nitrate plus nitrite, phosphate, and silicate) were determined on fresh samples (within 1 h of sampling) using standard colorimetric methodologies adapted for use on an Auto-Analyzer 3 (Bran þ Luebbe). A RAMSES ASC scalar hyperspectral irradiance sensor (TriOS) was mounted on the flight bridge to measure downwelling irradiance with 1 nm intervals during the day. A total of 50 and 102 discrete water samples were collected over the euphotic zone at 13 and 20 stations for legs 1 and 2, respectively for fluorometrically chlorophyll a measurements and absorption analysis of phytoplankton, non-algal particules (NAP) and colored dissolved organic matter (CDOM). Water samples (preserved in acidic Lugol solution) were enumerated and identified to the lowest possible taxonomic rank using an inverted microscope. Concentrations of chlorophyll a and chlorophyll b were obtained by HPLC measurements and these two pigments were used for the calculation of the ratios of chl b to chl a. The objective of this study is to clarify the variability of phytoplankton light absorption properties with light, temperature, and nutrients in a polar environment. To completely describe the light absorption properties by all optical components, absorption coefficients of non-algal particles (NAP) and colored dissolved organic matter (CDOM) are also examined. This study focuses on the optical properties variability during the early winter transition period when sea ice cover is formed and should allow us to understand the behavior of absorption properties of phytoplankton for polar waters that are covered by sea ice for a great part of the year. Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://metadata.arice-h2020.eu/geonetwork/srv/api/records/7246d837-004e-4f6e-9c6c-268533ef78aa/attachments/map.png Arctic Ocean Canadian High Arctic Chlorophyll Nutrients Photosynthetically available radiation (PAR) Phytoplankton Sea ice Water temperature Polar Data Catalogue Thesaurus (Canada) 2021-06-02 Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://www.polardata.ca/pdcinput/public/keywordlibrary Southern Beaufort Sea and the Amundsen Gulf Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse eng; CAN environment -139 -120.8 69.8 72.4 Time period can be either covered by the content of the dataset or the date when the data has been collected. 2003-09-13 2003-11-25 Summary: Not Applicable Research Program(s): ArcticNet,CASES. For further information: atsushi.matsuoka@obs-vlfr.fr false Digital file 1.0 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca This metadata was generated from the PDC metadata database at 2021-06-02 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca