Air mass origin signals in δ 18 O of tree-ring cellulose revealed by back-trajectory modeling at the monsoonal Tibetan plateau
A profound consideration of stable oxygen isotope source water origins is a precondition for an unambiguous palaeoenvironmental interpretation of terrestrial δ O archives. To stress the influence of air mass origins on widely used δ O tree-ring chronologies, we conducted correlation analyses between...
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Published in | International journal of biometeorology Vol. 61; no. 6; pp. 1109 - 1124 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.06.2017
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Subjects | |
Online Access | Get full text |
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Summary: | A profound consideration of stable oxygen isotope source water origins is a precondition for an unambiguous palaeoenvironmental interpretation of terrestrial δ
O archives. To stress the influence of air mass origins on widely used δ
O tree-ring chronologies, we conducted correlation analyses between six annually resolved δ
O tree-ring cellulose ([Formula: see text]) chronologies and mean annual air package origins obtained from backward trajectory modeling. This novel approach has been tested for a transect at the southeastern Tibetan plateau (TP), where air masses with different isotopic composition overlap. Detailed examinations of daily precipitation amounts and monthly precipitation δ
O values ([Formula: see text]) were conducted with the ERA Interim and Laboratoire de Météorologie Dynamique General Circulation Model (LMDZiso) data, respectively. Particularly the southernmost study sites are influenced by a distinct amount effect. Here, air package origin [Formula: see text] relations are generally weaker in contrast to our northern located study sites. We found that tree-ring isotope signatures at dry sites with less rain days per year tend to be influenced stronger by air mass origin than tree-ring isotope values at semi-humid sites. That implies that the local hydroclimate history inferred from [Formula: see text] archives is better recorded at semi-humid sites. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0020-7128 1432-1254 |
DOI: | 10.1007/s00484-016-1292-y |