期刊
GEOPHYSICAL RESEARCH LETTERS
卷 46, 期 14, 页码 8572-8581出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL083039
关键词
Arctic; ice nucleation; phytoplankton bloom; aerosol-cloud interactions; Arctic aerosol
资金
- National Oceanic and Atmospheric Administration (NOAA)'s Arctic Research Program
- NOAA Experiential Research & Training Opportunities (NERTO) program
- NOAA Earnest F. Hollings Scholarship program
- National Science Foundation [PLR-1303617]
As Arctic temperatures rise at twice the global rate, sea ice is diminishing more quickly than models can predict. Processes that dictate Arctic cloud formation and impacts on the atmospheric energy budget are poorly understood, yet crucial for evaluating the rapidly changing Arctic. In parallel, warmer temperatures afford conditions favorable for productivity of microorganisms that can effectively serve as ice nucleating particles (INPs). Yet the sources of marine biologically derived INPs remain largely unknown due to limited observations. Here we show, for the first time, how biologically derived INPs were likely transported hundreds of kilometers from deep Bering Strait waters and upwelled to the Arctic Ocean surface to become airborne, a process dependent upon a summertime phytoplankton bloom, bacterial respiration, ocean dynamics, and wind-driven mixing. Given projected enhancement in marine productivity, combined oceanic and atmospheric transport mechanisms may play a crucial role in provision of INPs from blooms to the Arctic atmosphere.
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