Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models
Despite the importance of interdecadal climate variability, we have a limited understanding of which geographic regions are associated with global temperature variability at these timescales. The instrumental record tends to be too short to develop sample statistics to study interdecadal climate var...
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ftdukeunivdsp:oai:localhost:10161/26195 2023-11-12T04:22:20+01:00 Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models Parsons, LA Hakim, GJ 2022-11-02T13:21:33Z application/pdf https://hdl.handle.net/10161/26195 en eng American Geophysical Union (AGU) Journal of Geophysical Research: Atmospheres 10.1029/2019JD030426 2169-897X 2169-8996 https://hdl.handle.net/10161/26195 Journal article 2022 ftdukeunivdsp 2023-10-17T09:36:58Z Despite the importance of interdecadal climate variability, we have a limited understanding of which geographic regions are associated with global temperature variability at these timescales. The instrumental record tends to be too short to develop sample statistics to study interdecadal climate variability, and Coupled Model Intercomparison Project, Phase 5 (CMIP5) climate models tend to disagree about which locations most strongly influence global mean interdecadal temperature variability. Here we use a new paleoclimate data assimilation product, the Last Millennium Reanalysis (LMR), to examine where local variability is associated with global mean temperature variability at interdecadal timescales. The LMR framework uses an ensemble Kalman filter data assimilation approach to combine the latest paleoclimate data and state-of-the-art model data to generate annually resolved field reconstructions of surface temperature, which allow us to explore the timing and dynamics of preinstrumental climate variability in new ways. The LMR consistently shows that the middle- to high-latitude north Pacific and the high-latitude North Atlantic tend to lead global temperature variability on interdecadal timescales. These findings have important implications for understanding the dynamics of low-frequency climate variability in the preindustrial era. Article in Journal/Newspaper North Atlantic Duke University Libraries: DukeSpace Pacific |
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Open Polar |
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Duke University Libraries: DukeSpace |
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ftdukeunivdsp |
language |
English |
description |
Despite the importance of interdecadal climate variability, we have a limited understanding of which geographic regions are associated with global temperature variability at these timescales. The instrumental record tends to be too short to develop sample statistics to study interdecadal climate variability, and Coupled Model Intercomparison Project, Phase 5 (CMIP5) climate models tend to disagree about which locations most strongly influence global mean interdecadal temperature variability. Here we use a new paleoclimate data assimilation product, the Last Millennium Reanalysis (LMR), to examine where local variability is associated with global mean temperature variability at interdecadal timescales. The LMR framework uses an ensemble Kalman filter data assimilation approach to combine the latest paleoclimate data and state-of-the-art model data to generate annually resolved field reconstructions of surface temperature, which allow us to explore the timing and dynamics of preinstrumental climate variability in new ways. The LMR consistently shows that the middle- to high-latitude north Pacific and the high-latitude North Atlantic tend to lead global temperature variability on interdecadal timescales. These findings have important implications for understanding the dynamics of low-frequency climate variability in the preindustrial era. |
format |
Article in Journal/Newspaper |
author |
Parsons, LA Hakim, GJ |
spellingShingle |
Parsons, LA Hakim, GJ Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
author_facet |
Parsons, LA Hakim, GJ |
author_sort |
Parsons, LA |
title |
Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
title_short |
Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
title_full |
Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
title_fullStr |
Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
title_full_unstemmed |
Local Regions Associated With Interdecadal Global Temperature Variability in the Last Millennium Reanalysis and CMIP5 Models |
title_sort |
local regions associated with interdecadal global temperature variability in the last millennium reanalysis and cmip5 models |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://hdl.handle.net/10161/26195 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Geophysical Research: Atmospheres 10.1029/2019JD030426 2169-897X 2169-8996 https://hdl.handle.net/10161/26195 |
_version_ |
1782337401837846528 |