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Re-examining an air mass-based appro...

Larsen, Joseph.

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Re-examining an air mass-based approach to detecting structural climate change, 1948-2011.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Re-examining an air mass-based approach to detecting structural climate change, 1948-2011./
作者:	Larsen, Joseph.
面頁冊數:	106 p.
附註:	Source: Masters Abstracts International, Volume: 53-03.
Contained By:	Masters Abstracts International53-03(E).
標題:	Geography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1557877
ISBN:	9781303963087

Re-examining an air mass-based approach to detecting structural climate change, 1948-2011.
Larsen, Joseph.

Re-examining an air mass-based approach to detecting structural climate change, 1948-2011. - 106 p.

Source: Masters Abstracts International, Volume: 53-03.

Thesis (M.S.)--The University of Wisconsin - Milwaukee, 2014.

This item must not be sold to any third party vendors.

Air mass-based approaches to observing changes in climate can have considerable value beyond simple trends of temperature and moisture, providing more thorough understanding of structural climate patterns. Few methodologies have adequately characterized recent air mass modification, however. This research seeks to update and improve upon the methods of a prior study, providing new data from 1948-2011, as well as more rigorous statistical analyses. Air mass types were created, and monthly averages of temperature, dewpoint, and relative frequency were calculated for each of the air masses in all four seasons; then the time series were submitted to regression analysis. The results of this re-analysis show an increase in warm air masses at the expense of cool air masses coinciding with the patterns of surface temperature and air mass warming seen in other recent studies. Some changes in the behavior of these air masses were noted, however, along with new variations in the character of others. These air mass trends have conceivable ties to prior general circulation patterns. Assuming that previous patterns have continued a possible increase in troughs, with a simultaneous decrease in ridges, in the western United States may be occurring, while new patterns of air mass source region modification and air mass mixing could also exist. Systematic warming of air masses also has conceivable, though rather modest relationships with large scale circulation patterns, including positive phases of the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO), as well as contraction of the circumpolar vortex.

ISBN: 9781303963087Subjects--Topical Terms:

524010
Geography.

Re-examining an air mass-based approach to detecting structural climate change, 1948-2011.
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520 $a Air mass-based approaches to observing changes in climate can have considerable value beyond simple trends of temperature and moisture, providing more thorough understanding of structural climate patterns. Few methodologies have adequately characterized recent air mass modification, however. This research seeks to update and improve upon the methods of a prior study, providing new data from 1948-2011, as well as more rigorous statistical analyses. Air mass types were created, and monthly averages of temperature, dewpoint, and relative frequency were calculated for each of the air masses in all four seasons; then the time series were submitted to regression analysis. The results of this re-analysis show an increase in warm air masses at the expense of cool air masses coinciding with the patterns of surface temperature and air mass warming seen in other recent studies. Some changes in the behavior of these air masses were noted, however, along with new variations in the character of others. These air mass trends have conceivable ties to prior general circulation patterns. Assuming that previous patterns have continued a possible increase in troughs, with a simultaneous decrease in ridges, in the western United States may be occurring, while new patterns of air mass source region modification and air mass mixing could also exist. Systematic warming of air masses also has conceivable, though rather modest relationships with large scale circulation patterns, including positive phases of the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO), as well as contraction of the circumpolar vortex.
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