Evidence for climate modulation of the 10 Be solar activity proxy
We used a snow pit record in conjunction with detailed snow accumulation data and oxygen isotope records to examine atmospheric transport and deposition effects on 10 Be at Law Dome, Antarctica. Data from an adjacent automatic weather station was used to date the record at snowfall event-scale resol...
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Online Access: | https://doi.org/10.1029/2005JD006764 http://ecite.utas.edu.au/42052 |
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ftunivtasecite:oai:ecite.utas.edu.au:42052 2023-05-15T13:40:51+02:00 Evidence for climate modulation of the 10 Be solar activity proxy Pedro, JB van Ommen, TD Curran, MAJ Morgan, VI Smith, A McMorrow, AJ 2006 application/pdf https://doi.org/10.1029/2005JD006764 http://ecite.utas.edu.au/42052 en eng American Geophysical Union http://ecite.utas.edu.au/42052/1/Pedro2005JD006764.pdf http://dx.doi.org/10.1029/2005JD006764 Pedro, JB and van Ommen, TD and Curran, MAJ and Morgan, VI and Smith, A and McMorrow, AJ, Evidence for climate modulation of the 10 Be solar activity proxy, Journal of Geophysical Research, 111, (21) pp. 1-6. ISSN 0148-0227 (2006) [Refereed Article] http://ecite.utas.edu.au/42052 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2006 ftunivtasecite https://doi.org/10.1029/2005JD006764 2019-12-13T21:18:46Z We used a snow pit record in conjunction with detailed snow accumulation data and oxygen isotope records to examine atmospheric transport and deposition effects on 10 Be at Law Dome, Antarctica. Data from an adjacent automatic weather station was used to date the record at snowfall event-scale resolution. In contrast to prior ice core studies in Antarctica, the snow pit record is of a sufficiently short duration (∼1 year) that 10 Be fluctuations reflect mainly atmospheric transport processes rather than solar modulation of production. Elevated concentrations of 10 Be were found in the late austral summer and early autumn snow, synchronous with the seasonal increase in stratospheric aerosols at Antarctic stations. A significant (P < 0.01) anticorrelation of 10 Be with δ 18 O occurs at the snowfall event scale. Fractionation of water isotopes at Law Dome is controlled by local and regional processes, specifically transport and local temperature. The anticorrelation seen here implies that 10 Be concentration was reduced in snow from warmer air masses (characterized by less negative δ 18 O). There is potential for confounding solar modulation with climatic modulation if at sites such as this one, warmer meteorological influences may be associated with reduced 10 Be concentrations. Quantification of the significance of this effect for the longer-term 10 Be record will require analysis of longer 10 Be records from different sites. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core eCite UTAS (University of Tasmania) Antarctic Austral Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Journal of Geophysical Research 111 D21 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Pedro, JB van Ommen, TD Curran, MAJ Morgan, VI Smith, A McMorrow, AJ Evidence for climate modulation of the 10 Be solar activity proxy |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
We used a snow pit record in conjunction with detailed snow accumulation data and oxygen isotope records to examine atmospheric transport and deposition effects on 10 Be at Law Dome, Antarctica. Data from an adjacent automatic weather station was used to date the record at snowfall event-scale resolution. In contrast to prior ice core studies in Antarctica, the snow pit record is of a sufficiently short duration (∼1 year) that 10 Be fluctuations reflect mainly atmospheric transport processes rather than solar modulation of production. Elevated concentrations of 10 Be were found in the late austral summer and early autumn snow, synchronous with the seasonal increase in stratospheric aerosols at Antarctic stations. A significant (P < 0.01) anticorrelation of 10 Be with δ 18 O occurs at the snowfall event scale. Fractionation of water isotopes at Law Dome is controlled by local and regional processes, specifically transport and local temperature. The anticorrelation seen here implies that 10 Be concentration was reduced in snow from warmer air masses (characterized by less negative δ 18 O). There is potential for confounding solar modulation with climatic modulation if at sites such as this one, warmer meteorological influences may be associated with reduced 10 Be concentrations. Quantification of the significance of this effect for the longer-term 10 Be record will require analysis of longer 10 Be records from different sites. |
format |
Article in Journal/Newspaper |
author |
Pedro, JB van Ommen, TD Curran, MAJ Morgan, VI Smith, A McMorrow, AJ |
author_facet |
Pedro, JB van Ommen, TD Curran, MAJ Morgan, VI Smith, A McMorrow, AJ |
author_sort |
Pedro, JB |
title |
Evidence for climate modulation of the 10 Be solar activity proxy |
title_short |
Evidence for climate modulation of the 10 Be solar activity proxy |
title_full |
Evidence for climate modulation of the 10 Be solar activity proxy |
title_fullStr |
Evidence for climate modulation of the 10 Be solar activity proxy |
title_full_unstemmed |
Evidence for climate modulation of the 10 Be solar activity proxy |
title_sort |
evidence for climate modulation of the 10 be solar activity proxy |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
https://doi.org/10.1029/2005JD006764 http://ecite.utas.edu.au/42052 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic Austral Law Dome |
geographic_facet |
Antarctic Austral Law Dome |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
http://ecite.utas.edu.au/42052/1/Pedro2005JD006764.pdf http://dx.doi.org/10.1029/2005JD006764 Pedro, JB and van Ommen, TD and Curran, MAJ and Morgan, VI and Smith, A and McMorrow, AJ, Evidence for climate modulation of the 10 Be solar activity proxy, Journal of Geophysical Research, 111, (21) pp. 1-6. ISSN 0148-0227 (2006) [Refereed Article] http://ecite.utas.edu.au/42052 |
op_doi |
https://doi.org/10.1029/2005JD006764 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D21 |
_version_ |
1766141185542324224 |