Impacts of changing weather patterns due to the global warming on black carbon transport and deposition to the Arctic
By modifying the albedo of the sea ice, black carbon (BC) deposited during the winter in the Arctic might contribute to the observed reduction of the sea ice cover in the recent years. This study attempts to estimate how the modification of large scale weather patterns due to the climate change impacts the transport of BC to the Arctic and its deposition on the sea ice. A new statistical algorithm has been developed to combine reanalysis estimates of three atmospheric patterns that govern the near-surface warming of the Northern Hemisphere in the winter with model estimates of transport and deposition of BC over the arctic sea ice. It was found that two atmospheric patterns have an impact on high latitudes and are closely linked to the sea ice melting tendency, while the third is limited to the lower latitudes. The combined impact of the three independent atmospheric patterns on winter deposition trends of BC between 1980 and 2015 indicates a decreasing tendency over the first-year sea ice cover in the eastern Arctic that melts each summer. On the other hand, the deposition over the multiyear sea ice cover in the central and western Arctic increases. During the last decades the increased BC deposition in the winter could eventually contribute to the enhanced melting of the multiyear sea ice.
DOBRICIC Srdan;
POZZOLI Luca;
VIGNATI Elisabetta;
RUSSO Simone;
2020-11-06
Publications Office of the European Union
JRC99865
978-92-79-54639-6 (online),
1831-9424 (online),
EUR 27711 EN,
OP LB-NA-27711-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC99865,
10.2788/879160 (online),
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