Greenland records of aerosol source and atmospheric lifetime changes from the Eemian to the Holocene.

ABSTRACT: The Northern Hemisphere experienced dramatic changes during the last glacial, featuring vast ice sheets and abrupt climate events, while high northern latitudes during the last interglacial (Eemian) were warmer than today. Here we use high-resolution aerosol records from the Greenland NEEM ice core to reconstruct the environmental alterations in aerosol source regions accompanying these changes. Separating source and transport effects, we find strongly reduced terrestrial biogenic emissions during glacial times reflecting net loss of vegetated area in North America. Rapid climate changes during the glacial have little effect on terrestrial biogenic aerosol emissions. A strong increase in terrestrial dust emissions during the coldest intervals indicates higher aridity and dust storm activit

SUBMITTER: Schupbach S 

PROVIDER: S-EPMC5902614 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature