Satellite evidence of ecosystem changes in the White Sea: A semi-enclosed arctic marginal shelf sea

Details Satellite evidence of ecosystem changes in the White Sea: A semi-enclosed arctic marginal shelf sea Satellite evidence of ecosystem changes in the White Sea: A semi-enclosed arctic marginal shelf sea

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3408604p&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 8, CiteID L08604

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Biogeosciences: Marine Systems (4800), Global Change: Impacts Of Global Change (1225), Global Change: Remote Sensing (1855), Oceanography: General: Marginal And Semi-Enclosed Seas, Geographic Location: Arctic Region (0718, 4207)

Scientific paper

Recent observations suggest an arctic climate system in broad transformation, yet the regional marine-ecosystem response is poorly known. Here, we develop and analyze a comprehensive biogeophysical dataset of key water constituents - chlorophyll (chl), suspended sediments (sm) and dissolved organic matter (doc) - using satellite ocean-color data from the White Sea in the Russian Arctic, for the period 1998-2004. The revealed changes in chl, sm and doc are more pronounced in the bays (e.g., the southeastern bay trends are -20%, +18% and +11%, respectively) than in the central basin (-5%, +5% and +3%, respectively). The chlorophyll decreases reflect the impact of enhanced runoff on sm and doc, which make the water more turbid and less favourable for phytoplankton growth, in contrast to other arctic seas where increased phytoplankton is expected. This case study supports our hypothesis that the marine ecosystems of semi-enclosed arctic shelf seas respond rapidly to climate change and are thus particularly vulnerable to future global warming.

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