Dmitry V. Pozdnyakov
Nansen Centre
Russia
Title: Inorganic carbon production within E. huxleyi blooms in subpolar and polar seas: A satellite time series study (1998-2013)
Biography
Biography: Dmitry V. Pozdnyakov
Abstract
Owing to developed original algorithms, multi-year time series of variations in the E. huxleyi blooming occurrence, surficial extent as well as the content of particulate inorganic carbon (PIC) and partial pressure of CO2 (DCO2) in the North, Norwegian, Greenland, Barents and Bering Seas were obtained from OC CCI data for the time period 1998-2013.
The bloom areas in the North Atlantic-Arctic water are the lowest in the Greenland Sea (10000 -3000 km2) and by an order of magnitude higher in the Barents Sea. The same pattern holds for total PIC within blooms: 400-14000 t in the Greenland Sea and ~350 000 t in the Barents Sea.
Annually invariable spatio-temporal pattern of E. huxleyi blooming advancement across the North Atlantic and Arctic Oceans is revealed. Starting from the southern Great Britain, blooms eventually appear firstly in the North and Norwegian Seas (in early June), then in the Greenland Sea (in late June), and finally in the Barents Sea (in late July-early September). In the Bering Sea the counter pattern is highly irregular: before and after the 1997-2013 period of high intensity of this phenomenon, the blooms are sporadic and their extent is insignificant. The bloom area extents and PIC contents in the Barents and Bering Sea are very similar. The assessed values of (DCO2) indicate that within E. huxleyi blooms the ocean CO2 absorption capacity is appreciably decreased.