Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability
We consider monthly anomalies of zonally averaged sea level pressure (SLP) in the Northern Hemisphere (NH) from two reanalysis products. A measure of synchronization utilizing correlation coefficient in a five-year sliding window across all latitude pairs is computed over this data. It is found that...
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ftunivwisconmil:oai:dc.uwm.edu:etd-1438 2023-07-02T03:33:42+02:00 Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability Verbeten, Joshua Daniel 2014-05-01T07:00:00Z application/pdf https://dc.uwm.edu/etd/433 https://dc.uwm.edu/context/etd/article/1438/viewcontent/Verbeten_uwm_0263m_10595.pdf unknown UWM Digital Commons https://dc.uwm.edu/etd/433 https://dc.uwm.edu/context/etd/article/1438/viewcontent/Verbeten_uwm_0263m_10595.pdf Theses and Dissertations Climate Decadal Sea Level Pressure Synchronization Temperature Variability Atmospheric Sciences text 2014 ftunivwisconmil 2023-06-13T18:28:53Z We consider monthly anomalies of zonally averaged sea level pressure (SLP) in the Northern Hemisphere (NH) from two reanalysis products. A measure of synchronization utilizing correlation coefficient in a five-year sliding window across all latitude pairs is computed over this data. It is found that there have been two NH SLP synchronization episodes since the 1890s, which are significant to approximately three standard deviations. Similar statistically significant synchronization events are seen in simulations of 42 global climate models (GCM) with the dominant synchronization pattern in GCMs proving dynamically consistent with observations. Furthermore, a GCM-based NH temperature anomaly composite shows a flattening of temperature time series in a decade prior to the synchronization episodes, a brief warming trend just after episodes, and a cooling trend thereafter, all of which agrees with the temperature structure around the observed synchronization episode seen in the 1890s. NH sea ice concentration anomalies are also composited from global climate models and show a decrease in ice concentration approximately one to two years after the maximum increase in temperature and an increase in ice concentration one to two years after the maximum decrease in temperature. These results have substantial implications for climate prediction up to a decade in advance. Text Sea ice University of Wisconsin-Milwaukee: UWM Digital Commons |
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University of Wisconsin-Milwaukee: UWM Digital Commons |
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ftunivwisconmil |
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Climate Decadal Sea Level Pressure Synchronization Temperature Variability Atmospheric Sciences |
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Climate Decadal Sea Level Pressure Synchronization Temperature Variability Atmospheric Sciences Verbeten, Joshua Daniel Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
topic_facet |
Climate Decadal Sea Level Pressure Synchronization Temperature Variability Atmospheric Sciences |
description |
We consider monthly anomalies of zonally averaged sea level pressure (SLP) in the Northern Hemisphere (NH) from two reanalysis products. A measure of synchronization utilizing correlation coefficient in a five-year sliding window across all latitude pairs is computed over this data. It is found that there have been two NH SLP synchronization episodes since the 1890s, which are significant to approximately three standard deviations. Similar statistically significant synchronization events are seen in simulations of 42 global climate models (GCM) with the dominant synchronization pattern in GCMs proving dynamically consistent with observations. Furthermore, a GCM-based NH temperature anomaly composite shows a flattening of temperature time series in a decade prior to the synchronization episodes, a brief warming trend just after episodes, and a cooling trend thereafter, all of which agrees with the temperature structure around the observed synchronization episode seen in the 1890s. NH sea ice concentration anomalies are also composited from global climate models and show a decrease in ice concentration approximately one to two years after the maximum increase in temperature and an increase in ice concentration one to two years after the maximum decrease in temperature. These results have substantial implications for climate prediction up to a decade in advance. |
format |
Text |
author |
Verbeten, Joshua Daniel |
author_facet |
Verbeten, Joshua Daniel |
author_sort |
Verbeten, Joshua Daniel |
title |
Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
title_short |
Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
title_full |
Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
title_fullStr |
Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
title_full_unstemmed |
Northern Hemisphere Sea Level Pressure Synchronization and Its Effect on Northern Hemisphere Temperature Variability |
title_sort |
northern hemisphere sea level pressure synchronization and its effect on northern hemisphere temperature variability |
publisher |
UWM Digital Commons |
publishDate |
2014 |
url |
https://dc.uwm.edu/etd/433 https://dc.uwm.edu/context/etd/article/1438/viewcontent/Verbeten_uwm_0263m_10595.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Theses and Dissertations |
op_relation |
https://dc.uwm.edu/etd/433 https://dc.uwm.edu/context/etd/article/1438/viewcontent/Verbeten_uwm_0263m_10595.pdf |
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1770273749885517824 |