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  Borehole versus isotope temperatures on Greenland: Seasonality does matter

Werner, M., Mikolajewicz, U., Heimann, M., & Hoffmann, G. (2000). Borehole versus isotope temperatures on Greenland: Seasonality does matter. Geophysical Research Letters, 27(5), 723-726. doi:10.1029/1999GL006075.

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Werner, M., Author
Mikolajewicz, U., Author
Heimann, Martin1, Author           
Hoffmann, G., Author
Affiliations:
1Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497755              

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Free keywords: Ice core records Precipitation Climate Sheet Model
 Abstract: New simulation results obtained with the Hamburg Atmosphere General Circulation Model ECHAM-4 under maximum glacial boundary (LGM) conditions confirm the paleotemperatures on Greenland determined by borehole thermometry. The disagreement between delta(18)O isotope based temperatures and the borehole temperatures of the LGM is not only reproduced by the model, but the simulation results provide a plausible explanation: Paleotemperatures inferred from delta(18)O measurements in ice cores are biased by a substantially increased seasonality of precipitation over Greenland during the LGM. During the glacial winter a much mote zonal circulation prevents the effective transport of moisture to the Greenland ice sheet, and therefore reduces the contribution of isotopically strongly depleted winter snow to the annual mean isotope signal. [References: 21]

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 Dates: 2000
 Publication Status: Issued
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 Identifiers: Other: BGC0307
DOI: 10.1029/1999GL006075
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Title: Geophysical Research Letters
  Abbreviation : GRL
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 27 (5) Sequence Number: - Start / End Page: 723 - 726 Identifier: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217