【摘 要】
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The North Pacific Ocean is one of the important CO2 sinks in the world,with high primary production.Recently,the variation of phytoplankton species and their distributions have been frequently reporte
【机 构】
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Graduate School of Science and Engineering,University of Toyama,Japan
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The North Pacific Ocean is one of the important CO2 sinks in the world,with high primary production.Recently,the variation of phytoplankton species and their distributions have been frequently reported and linked to changes in the marine environment associated with advancing global warming.In 2003 and 2004,the distribution of the coccolith and its seasonal variation were observed in the subarctic North Pacific area where diatoms have historically had the most dominant distribution.However,the coccolith affects the variation of atmospheric CO2 concentration and its increasing tendency,and it seems to influence climatic variation.Further,backward trajectory methods show the air mass above this extend region mainly (~70%) come from the desert regions of China.In the other words,it suggests that one of the possible factors that affect the seasonal changes of the phytoplankton distribution on the western North Pacific is the components and fluxes of aerosol depositions transported long-distance from the Asian continent.The aerosol geochemistry from our on board observations during 2001-2006 suggests that the dust and anthropogenic components adsorbed on aerosols during long distance travel over China,Russia,and Japan is subsequently deposited on the surface of the North Pacific,together with the continental dust events.
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