POSTER Session 4
Thursday, October 10
11:10–13:00
Poster Session | 1 | 2 | 3 | 4 | Instructions | Schedule at a Glance
ABSTRACT 980 | POSTER TH-046
ASSESSING GLOBCOLOUR-S3 CHLOROPHYLL-A RETRIEVALS IN WEST GREENLAND
The MarineBasis Monitoring Programmes in Nuuk and Disko Bay in Greenland have performed monthly sampling of hydrography, water chemistry and phytoplankton for over 15 years as part of the Greenland Ecosystem Monitoring Programme (GEM). Such spatial-temporal resolution, however, may not capture changes in phytoplankton communities occurring at shorter time windows. Likewise, the sampling location is mostly limited to a single station which may not cover the patchy phytoplankton distribution. Here, we investigate the performance of GlobColour Sentinel-3 (S3) Chlorophyll-a (Chl-a) estimates (2016-2022) in relation to in situ data collected in Nuup Kangerlua (Nuuk Fjord) and Disko Bay with the aim to use GlobColour S3 data to increase both spatial and temporal coverage. Overall, the S3 estimates were significantly correlated with the in situ measurements and can reproduce the seasonal variability. However, a few exceptions were observed: during spring, when in situ measurements report the highest Chl-a values that are underestimated by S3; and during late-summer and autumn, when Chl-a values are low but with an overestimation by S3, likely due to the presence of glacier flour (fine silt particles) in the water.
Rafael Goncalves-Araujo, Technical University of Denmark, National Institute of Aquatic Resources, Denmark, [email protected], https://orcid.org/0000-0001-8344-8326
Colin A. Stedmon, National Institute of Aquatic Resources, Technical University of Denmark (DTU Aqua), Denmark, [email protected], https://orcid.org/0000-0001-6642-9692
Tobias R. Vonnahme, Greenland Institute of Natural Resources (GINR), Greenland, [email protected]
Efrén López-Blanco, Greenland Institute of Natural Resources (GINR), Greenland, [email protected]
Per Juel Hansen, Department of Biology, University of Copenhagen (KU), Denmark, [email protected]
Thomas Juul-Pedersen, Greenland Institute of Natural Resources (GINR), Greenland, [email protected]
Poster Session | 1 | 2 | 3 | 4 |
Instructions | Schedule at a Glance
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