Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation
The decadal covariability of northern wintertime land surface temperature and 500-hPa geopotential anomalies is examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research and the Twentieth-Century Reanalyses over the twentieth century and a 996-yr prein...
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ftosti:oai:osti.gov:1565237 2023-07-30T04:03:55+02:00 Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation Yu, B. Wang, X. L. Zhang, X. B. Cole, J. Feng, Y. 2021-08-02 application/pdf http://www.osti.gov/servlets/purl/1565237 https://www.osti.gov/biblio/1565237 https://doi.org/10.1175/jcli-d-13-00266.1 unknown http://www.osti.gov/servlets/purl/1565237 https://www.osti.gov/biblio/1565237 https://doi.org/10.1175/jcli-d-13-00266.1 doi:10.1175/jcli-d-13-00266.1 54 ENVIRONMENTAL SCIENCES 2021 ftosti https://doi.org/10.1175/jcli-d-13-00266.1 2023-07-11T09:37:06Z The decadal covariability of northern wintertime land surface temperature and 500-hPa geopotential anomalies is examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research and the Twentieth-Century Reanalyses over the twentieth century and a 996-yr preindustrial climate simulation from the Canadian Earth System Model. Based on the reanalysis data, the covariability is dominated by two leading maximum covariance analysis (MCA) modes. MCA1 is characterized by temperature anomalies over most of Canada, the eastern United States, Mexico, and Eurasian mid- to high latitudes, accompanied by anomalies of opposite sign elsewhere over northern landmasses. MCA2 features temperature anomalies over most of North America, Eurasia, and Greenland with opposite anomalies elsewhere. In the upper troposphere the synoptic vorticity fluxes reinforce the anomalous circulation, while in the lower troposphere advection by the anomalous mean flow offsets the eddy forcing and maintains the decadal temperature perturbation. The MCA1-associated variability has a broad spectrum over decadal–interdecadal time scales, while the MCA2-related variability has a significant power peak around 20 yr. The change of temperature and geopotential trends around 1990 tends to be a decadal-scale shift in winter and has significant features of the leading mode of the decadal covariability. The climate model has broadly similar decadal covariability, including the leading MCA patterns as well as the temporal evolution of the patterns. The decadal temperature and geopotential anomalies primarily covary with the North Atlantic Oscillation but also with the variability of the North Pacific index, while the Southern Oscillation index variability tends to be the least important predictor for the northern decadal temperature and geopotential anomalies. Other/Unknown Material Greenland North Atlantic North Atlantic oscillation SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Canada Greenland Pacific Journal of Climate 27 2 633 651 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
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topic |
54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Yu, B. Wang, X. L. Zhang, X. B. Cole, J. Feng, Y. Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
The decadal covariability of northern wintertime land surface temperature and 500-hPa geopotential anomalies is examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research and the Twentieth-Century Reanalyses over the twentieth century and a 996-yr preindustrial climate simulation from the Canadian Earth System Model. Based on the reanalysis data, the covariability is dominated by two leading maximum covariance analysis (MCA) modes. MCA1 is characterized by temperature anomalies over most of Canada, the eastern United States, Mexico, and Eurasian mid- to high latitudes, accompanied by anomalies of opposite sign elsewhere over northern landmasses. MCA2 features temperature anomalies over most of North America, Eurasia, and Greenland with opposite anomalies elsewhere. In the upper troposphere the synoptic vorticity fluxes reinforce the anomalous circulation, while in the lower troposphere advection by the anomalous mean flow offsets the eddy forcing and maintains the decadal temperature perturbation. The MCA1-associated variability has a broad spectrum over decadal–interdecadal time scales, while the MCA2-related variability has a significant power peak around 20 yr. The change of temperature and geopotential trends around 1990 tends to be a decadal-scale shift in winter and has significant features of the leading mode of the decadal covariability. The climate model has broadly similar decadal covariability, including the leading MCA patterns as well as the temporal evolution of the patterns. The decadal temperature and geopotential anomalies primarily covary with the North Atlantic Oscillation but also with the variability of the North Pacific index, while the Southern Oscillation index variability tends to be the least important predictor for the northern decadal temperature and geopotential anomalies. |
author |
Yu, B. Wang, X. L. Zhang, X. B. Cole, J. Feng, Y. |
author_facet |
Yu, B. Wang, X. L. Zhang, X. B. Cole, J. Feng, Y. |
author_sort |
Yu, B. |
title |
Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
title_short |
Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
title_full |
Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
title_fullStr |
Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
title_full_unstemmed |
Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation |
title_sort |
decadal covariability of the northern wintertime land surface temperature and atmospheric circulation |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1565237 https://www.osti.gov/biblio/1565237 https://doi.org/10.1175/jcli-d-13-00266.1 |
geographic |
Canada Greenland Pacific |
geographic_facet |
Canada Greenland Pacific |
genre |
Greenland North Atlantic North Atlantic oscillation |
genre_facet |
Greenland North Atlantic North Atlantic oscillation |
op_relation |
http://www.osti.gov/servlets/purl/1565237 https://www.osti.gov/biblio/1565237 https://doi.org/10.1175/jcli-d-13-00266.1 doi:10.1175/jcli-d-13-00266.1 |
op_doi |
https://doi.org/10.1175/jcli-d-13-00266.1 |
container_title |
Journal of Climate |
container_volume |
27 |
container_issue |
2 |
container_start_page |
633 |
op_container_end_page |
651 |
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1772815046315868160 |