A new technique for spaceborne detection and quantification of coccolithophore driven changes relevant to the Arctic ecology
|Theme||3. Meteorological Cooperation|
|Session Name||3.1 Opportunities and challenges of remote sensing techniques to meet current and future needs for monitoring the Arctic|
|Author(s)||Dmitry Kondrik (Nansen International Environmental and Remote Sensing Centre, Russian Federation), Dmitry Pozdnyakov (Nansen International Environmental and Remote Sensing Centre, Russian Federation)|
In the world’s oceans blooms of E. huxleyi are considered as the biggest “investors” to the particulate inorganic carbon (PIC) pool in the form of calcite which affects the aquatic ecology. Blooms usually cover hundreds of thousand km2. Thus, it is important to develop the specific algorithms for E. huxleyi blooms identification and estimation of the total amount of PIC produced by them using satellite data. With this tool, series of variations in occurrence, spatial extent, and PIC content within E. huxleyi blooms in the North, Norwegian, Greenland, Barents, and Bering Seas were obtained for the time period 1998–2013. E. huxleyi blooms are found to advance from temperate to higher latitudes starting from North and Norwegian Seas (in early June), and ending in the Barents Sea (in late July–early September). The highest bloom areas in the North Atlantic–Arctic waters were registered in the Barents Sea (up to 250,000 km2). The same pattern holds for the total PIC content within E. huxleyi blooms: e.g. it is ~0.35 Mt in the Barents Sea. In the Bering Sea, the temporal and spatial dynamics of E. huxleyi development were highly irregular: before and after the 1997–2001 period of high intensity, the blooms are sporadic, their extent and PIC production are very low, whereas during 1997–2001, the production was once about ~0.7 Mt. We express our gratitude for the financial support of this study provided by the Russian Science Foundation (RSF) under the project 17-17-01117.