A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica
A mass balance program was initiated in the Vestfjella-Heimefrontfjella area of western Dronning Maud Land during the austral summer of 1988–1989. As a part of this program, spatial and temporal variations in snow accumulation and temperature/stable isotopes are measured using shallow firn cores. In...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1247 2023-05-15T13:46:24+02:00 A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica Isaksson, Elisabeth Karlén, Wibjörn Gundestrup, Niels Mayewski, Paul Andrew Whitlow, Sallie Twickler, Mark 1996-03-20T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/242 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1247&context=ers_facpub unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/242 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1247&context=ers_facpub This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Global warming Climate Change Antarctic warming Glaciology Atmospheric Sciences Climate Earth Sciences Geochemistry Hydrology text 1996 ftmaineuniv 2023-03-12T18:54:40Z A mass balance program was initiated in the Vestfjella-Heimefrontfjella area of western Dronning Maud Land during the austral summer of 1988–1989. As a part of this program, spatial and temporal variations in snow accumulation and temperature/stable isotopes are measured using shallow firn cores. In this paper we present surface accumulation data and discuss the climatic implications of the stable isotope records from two shallow firn cores. One 30-m-deep core, obtained about 200 km from the coast at 700 m asl (73°36′S, 12°26′W), covers the period 1932–1991. The other core was drilled at about 500 km from the coast at 2900 m asl (75°00′S, 2°00′E) and covers the period 1865–1991. The recent accumulation increase that has been reported from several areas of the Antarctic continent is not present in either of these records. Instead, our coastal record suggests a significant decrease in accumulation, with the strongest trend from about 1975. There is a positive trend in the oxygen isotope signal in both cores, which in the coastal core corresponds to a temperature increase of about 1.8°C since the early 1930s, and in the high-altitude core to about 0.8°C since 1865. However, it is likely that part of this increase in δ 18O is due to a change of moisture source. Text Antarc* Antarctic Antarctica Dronning Maud Land The University of Maine: DigitalCommons@UMaine Antarctic The Antarctic Austral Dronning Maud Land Heimefrontfjella ENVELOPE(-11.000,-11.000,-74.667,-74.667) Vestfjella ENVELOPE(-14.000,-14.000,-73.167,-73.167) |
institution |
Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Global warming Climate Change Antarctic warming Glaciology Atmospheric Sciences Climate Earth Sciences Geochemistry Hydrology |
spellingShingle |
Global warming Climate Change Antarctic warming Glaciology Atmospheric Sciences Climate Earth Sciences Geochemistry Hydrology Isaksson, Elisabeth Karlén, Wibjörn Gundestrup, Niels Mayewski, Paul Andrew Whitlow, Sallie Twickler, Mark A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
topic_facet |
Global warming Climate Change Antarctic warming Glaciology Atmospheric Sciences Climate Earth Sciences Geochemistry Hydrology |
description |
A mass balance program was initiated in the Vestfjella-Heimefrontfjella area of western Dronning Maud Land during the austral summer of 1988–1989. As a part of this program, spatial and temporal variations in snow accumulation and temperature/stable isotopes are measured using shallow firn cores. In this paper we present surface accumulation data and discuss the climatic implications of the stable isotope records from two shallow firn cores. One 30-m-deep core, obtained about 200 km from the coast at 700 m asl (73°36′S, 12°26′W), covers the period 1932–1991. The other core was drilled at about 500 km from the coast at 2900 m asl (75°00′S, 2°00′E) and covers the period 1865–1991. The recent accumulation increase that has been reported from several areas of the Antarctic continent is not present in either of these records. Instead, our coastal record suggests a significant decrease in accumulation, with the strongest trend from about 1975. There is a positive trend in the oxygen isotope signal in both cores, which in the coastal core corresponds to a temperature increase of about 1.8°C since the early 1930s, and in the high-altitude core to about 0.8°C since 1865. However, it is likely that part of this increase in δ 18O is due to a change of moisture source. |
format |
Text |
author |
Isaksson, Elisabeth Karlén, Wibjörn Gundestrup, Niels Mayewski, Paul Andrew Whitlow, Sallie Twickler, Mark |
author_facet |
Isaksson, Elisabeth Karlén, Wibjörn Gundestrup, Niels Mayewski, Paul Andrew Whitlow, Sallie Twickler, Mark |
author_sort |
Isaksson, Elisabeth |
title |
A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
title_short |
A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
title_full |
A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
title_fullStr |
A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
title_full_unstemmed |
A Century of Accumulation and Temperature Changes in Dronning Maud Land, Antarctica |
title_sort |
century of accumulation and temperature changes in dronning maud land, antarctica |
publisher |
DigitalCommons@UMaine |
publishDate |
1996 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/242 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1247&context=ers_facpub |
long_lat |
ENVELOPE(-11.000,-11.000,-74.667,-74.667) ENVELOPE(-14.000,-14.000,-73.167,-73.167) |
geographic |
Antarctic The Antarctic Austral Dronning Maud Land Heimefrontfjella Vestfjella |
geographic_facet |
Antarctic The Antarctic Austral Dronning Maud Land Heimefrontfjella Vestfjella |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/242 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1247&context=ers_facpub |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
_version_ |
1766241781077245952 |