Reconstructing the climate variation of eastern Peru over the last millennium ...
The ?^18 O of two speleothems from northeastern Peru provides a 1000 year history of precipitation variability at subannual to decadal resolution. The speleothem ?^18 O varies in response to shifting North Atlantic SSTs that bring about a southward or northward bias in the Intertropical Convergence...
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University of Southern California Digital Library (USC.DL)
2008
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ftdatacite:10.25549/usctheses-m1703 2024-03-31T07:54:17+00:00 Reconstructing the climate variation of eastern Peru over the last millennium ... Reuter, Justin Michael author 2008 https://dx.doi.org/10.25549/usctheses-m1703 https://digitallibrary.usc.edu/asset-management/2A3BF1QAKL5G en eng University of Southern California Digital Library (USC.DL) Geological Sciences degree program Master of Science degree College of Letters, Arts and Sciences school thesis Dissertation Thesis 2008 ftdatacite https://doi.org/10.25549/usctheses-m1703 2024-03-04T12:33:26Z The ?^18 O of two speleothems from northeastern Peru provides a 1000 year history of precipitation variability at subannual to decadal resolution. The speleothem ?^18 O varies in response to shifting North Atlantic SSTs that bring about a southward or northward bias in the Intertropical Convergence Zone. A southward bias in the ITCZ leads to increased precipitation over eastern Peru. Wetter periods cause lower speleothem ?^18 O due to the 'amount effect'. The 1000 year speleothem reconstruction documents a multicentury increase in the amount of precipitation during the "Little Ice Age". There has been a progressive decrease in precipitation over the past two centuries. These observations do not agree with earlier reconstructions of rainfall variability that relied upon river runoff proxies from northern South America. It is proposed that this discrepancy is a result of decreased river runoff in wetter periods because precipitation is stored at higher elevations as ice. ... Thesis North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
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Geological Sciences degree program Master of Science degree College of Letters, Arts and Sciences school |
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Geological Sciences degree program Master of Science degree College of Letters, Arts and Sciences school Reuter, Justin Michael author Reconstructing the climate variation of eastern Peru over the last millennium ... |
topic_facet |
Geological Sciences degree program Master of Science degree College of Letters, Arts and Sciences school |
description |
The ?^18 O of two speleothems from northeastern Peru provides a 1000 year history of precipitation variability at subannual to decadal resolution. The speleothem ?^18 O varies in response to shifting North Atlantic SSTs that bring about a southward or northward bias in the Intertropical Convergence Zone. A southward bias in the ITCZ leads to increased precipitation over eastern Peru. Wetter periods cause lower speleothem ?^18 O due to the 'amount effect'. The 1000 year speleothem reconstruction documents a multicentury increase in the amount of precipitation during the "Little Ice Age". There has been a progressive decrease in precipitation over the past two centuries. These observations do not agree with earlier reconstructions of rainfall variability that relied upon river runoff proxies from northern South America. It is proposed that this discrepancy is a result of decreased river runoff in wetter periods because precipitation is stored at higher elevations as ice. ... |
format |
Thesis |
author |
Reuter, Justin Michael author |
author_facet |
Reuter, Justin Michael author |
author_sort |
Reuter, Justin Michael author |
title |
Reconstructing the climate variation of eastern Peru over the last millennium ... |
title_short |
Reconstructing the climate variation of eastern Peru over the last millennium ... |
title_full |
Reconstructing the climate variation of eastern Peru over the last millennium ... |
title_fullStr |
Reconstructing the climate variation of eastern Peru over the last millennium ... |
title_full_unstemmed |
Reconstructing the climate variation of eastern Peru over the last millennium ... |
title_sort |
reconstructing the climate variation of eastern peru over the last millennium ... |
publisher |
University of Southern California Digital Library (USC.DL) |
publishDate |
2008 |
url |
https://dx.doi.org/10.25549/usctheses-m1703 https://digitallibrary.usc.edu/asset-management/2A3BF1QAKL5G |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.25549/usctheses-m1703 |
_version_ |
1795035056080683008 |