Isotope records from Mongolian and Alpine ice cores as climate indicators

Schotterer, U.; Fröhlich, K.; Gäggeler, H. W.; Sandjordj, S.; Stichler, W. (1997). Isotope records from Mongolian and Alpine ice cores as climate indicators. Climatic change, 36(3-4), pp. 519-530. Kluwer Academic Publishers 10.1023/A:1005338427567

[img]
Preview
Text
SCHOTTERER1997_Article_ISOTOPERECORDSFROMMONGOLIANAND.pdf - Published Version
Available under License Publisher holds Copyright.

Download (231kB) | Preview

The link between long term changes in the isotopic composition of precipitation and surface air temperature at a given location is of exceptional importance for paleoclimatic studies, as ahs been demonstrated by many recent publications based on the isotope records from polar ice cores. By means of direct comparison with instrumental data, this paper evaluates the potential of the deuterium and oxygen-18 records from two continental glaciers for monitoring climatic trends. The isotopic data presented characterize climatically contrasted enviroments. The records from the Swiss glacier show distinct seasonal variations. Oxygen-18 is fairly well correlated with the instrumental record of atmospheric temperature; the seasonal differences in deuterium excess reflect nearness to the oceanic moisture source. By contrast, the isotope data from the Mongolian site show poor correlation with atmospheric temperature. The seasonal variations in deuterium excess, with higher values during summer time, indicate that precipitation largely originates from re-evaporated continental moisture sources. In both cases however, the correlation with temperature is significantly improved by the elimination of values derived from years where major changes in seasonal distribution and/or snow loss obviously have occurred, thereby distoring the isotopic ratios for that particular year. Depending on the site selected for study, the stable isotope composition of ice cores should therefore be viewed not only as a proxy for atmospheric temperature, but also as an additional hydrometeorological parameter and source indicator for atmospheric moisture.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics

UniBE Contributor:

Schotterer, Ulrich Hermann

Subjects:

500 Science > 530 Physics

ISSN:

0165-0009

Publisher:

Kluwer Academic Publishers

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

31 Aug 2021 17:18

Last Modified:

31 Aug 2021 17:24

Publisher DOI:

10.1023/A:1005338427567

BORIS DOI:

10.48350/158504

URI:

https://boris.unibe.ch/id/eprint/158504

Actions (login required)

Edit item Edit item
Provide Feedback