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

Schüpbach, S. ; Fischer, H. ; Bigler, M. ; Erhardt, T. ; Gfeller, G. ; Leuenberger, D. ; Mini, O. ; Mulvaney, R. ; Abram, N. J. and Fleet, L. , et al. (2018) In Nature Communications 9(1).
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... (More)

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 activity in East Asian deserts. Glacial sea salt aerosol emissions in the North Atlantic region increase only moderately (50%), likely due to sea ice expansion. Lower aerosol concentrations in Eemian ice compared to the Holocene are mainly due to shortened atmospheric residence time, while emissions changed little.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
9
issue
1
article number
1476
publisher
Nature Publishing Group
external identifiers
  • pmid:29662058
  • scopus:85045555413
ISSN
2041-1723
DOI
10.1038/s41467-018-03924-3
language
English
LU publication?
yes
id
e66baed7-b4e2-40d5-9e86-d8d323307daa
date added to LUP
2018-04-26 08:26:03
date last changed
2024-04-29 07:50:17
@article{e66baed7-b4e2-40d5-9e86-d8d323307daa,
  abstract     = {{<p>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 activity in East Asian deserts. Glacial sea salt aerosol emissions in the North Atlantic region increase only moderately (50%), likely due to sea ice expansion. Lower aerosol concentrations in Eemian ice compared to the Holocene are mainly due to shortened atmospheric residence time, while emissions changed little.</p>}},
  author       = {{Schüpbach, S. and Fischer, H. and Bigler, M. and Erhardt, T. and Gfeller, G. and Leuenberger, D. and Mini, O. and Mulvaney, R. and Abram, N. J. and Fleet, L. and Frey, M. M. and Thomas, E. and Svensson, A. and Dahl-Jensen, D. and Kettner, E. and Kjaer, H. and Seierstad, I. and Steffensen, J. P. and Rasmussen, S. O. and Vallelonga, P. and Winstrup, M. and Wegner, A. and Twarloh, B. and Wolff, K. and Schmidt, K. and Goto-Azuma, K. and Kuramoto, T. and Hirabayashi, M. and Uetake, J. and Zheng, J. and Bourgeois, J. and Fisher, D. and Zhiheng, D. and Xiao, C. and Legrand, M. and Spolaor, A. and Gabrieli, J. and Barbante, C. and Kang, J. H. and Hur, S. D. and Hong, S. B. and Hwang, H. J. and Hong, S. and Hansson, M. and Iizuka, Y. and Oyabu, I. and Muscheler, R. and Adolphi, F. and Maselli, O. and McConnell, J. and Wolff, E. W.}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Greenland records of aerosol source and atmospheric lifetime changes from the Eemian to the Holocene}},
  url          = {{http://dx.doi.org/10.1038/s41467-018-03924-3}},
  doi          = {{10.1038/s41467-018-03924-3}},
  volume       = {{9}},
  year         = {{2018}},
}