Physics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3618813e&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 18, CiteID L18813
Physics
6
Cryosphere: Ice Cores (4932), Cryosphere: Biogeochemistry (0412, 0414, 1615, 4805, 4912), Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906)
Scientific paper
Emissions from forests represent an important source of gaseous precursors of aerosols that can significantly alter the regional radiation balance. Long-term records of biogenic emissions are available for Northern America and the Amazon Basin, whereas the historical development of emissions from Siberian forests, comprising about 20% of the world's forested area, is unknown so far. Here we investigate ice core ammonium and formate records for the last 750 years, representing biogenic emissions from boreal Siberian forests in the pre-industrial era. Biogenic emissions were found to be closely related to changes in temperature following variations in solar activity. In addition, anthropogenic emissions have caused a strong increase of the ammonium concentrations and a drop of the formate concentrations in the last 60 years.
Brütsch Sabina
Eichler Anja
Olivier Susanne
Papina Tatyana
Schwikowski Margit
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