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Climatology and variability of Northern Hemisphere seasons
Descriptive
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Title
Climatology and variability of Northern Hemisphere seasons
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Choi
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Gwangyong
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Gwangyong Choi
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author
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Robinson
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David
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Advisory Committee
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David A. Robinson
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chair
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Schneider
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Laura
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Advisory Committee
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Laura C. Schneider
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internal member
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Xu
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Ming
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Advisory Committee
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Ming Xu
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internal member
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Leathers
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Daniel
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Advisory Committee
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Daniel J. Leathers
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outside member
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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theses
OriginInfo
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2007
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2007
Language
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English
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electronic
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xxiii, 227 pages
Abstract
This dissertation is the first comprehensive study to define climatological seasons for temperature, snow, vegetation, and carbon dioxide on a hemispheric scale. The spatial propagation of climatological seasonal onsets and offsets as defined in this study differentiates the dynamical characteristics of empirical floating seasons from conventional static seasons such as the three month interval meteorological seasons. Spatial patterns of dynamical seasonal progression and its association with static and dynamic geographical factors are examined. Long-term trends and spatial patterns of identified changes in the dynamical floating onsets/offsets and durations are also discussed based on the past 40 years of observational data. The coherences and/or differences amongst various floating seasons and their potential linkages with large scale atmospheric circulation patterns are examined to develop seasonal prediction models. Finally, directions of future changes in seasonal onset/offset and duration are predicted by comparing current (1981-2000) and future (2081-2100) seasons derived from climate models.
Various temporal and spatial patterns of floating climatological seasons - thermal, snow, vegetation, and carbon dioxide - show significant associations with dynamic factors such as oceanic and atmospheric circulation, as well as static factors such as latitude, elevation, topography, surface condition, and proximity to water bodies. Various floating seasonal onsets/offsets and durations show coherences at mid-latitudes but differences in the circumpolar regions or in lower mid-latitude regions. A consistent temporal trend exhibited in time series analyses of various floating seasons is the reduction of winter duration, primarily due to an earlier spring onset. In particular, the earlier spring onset observed in Europe, East Asia, and the southwestern United States shows significant associations with the hemispheric circulation pattern driven by a positive winter AO phase. Observed and modeled seasonal data suggest that the reduction of thermal winter duration is predicted to continue in the future over continents mainly due to an earlier winter offset. It is also predicted that, primarily due to an earlier summer onset, thermal summer duration will continue to increase along 30° N over oceans, suggesting potential changes in low latitude atmospheric circulation.
Various temporal and spatial patterns of floating climatological seasons - thermal, snow, vegetation, and carbon dioxide - show significant associations with dynamic factors such as oceanic and atmospheric circulation, as well as static factors such as latitude, elevation, topography, surface condition, and proximity to water bodies. Various floating seasonal onsets/offsets and durations show coherences at mid-latitudes but differences in the circumpolar regions or in lower mid-latitude regions. A consistent temporal trend exhibited in time series analyses of various floating seasons is the reduction of winter duration, primarily due to an earlier spring onset. In particular, the earlier spring onset observed in Europe, East Asia, and the southwestern United States shows significant associations with the hemispheric circulation pattern driven by a positive winter AO phase. Observed and modeled seasonal data suggest that the reduction of thermal winter duration is predicted to continue in the future over continents mainly due to an earlier winter offset. It is also predicted that, primarily due to an earlier summer onset, thermal summer duration will continue to increase along 30° N over oceans, suggesting potential changes in low latitude atmospheric circulation.
Note
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Ph.D.
Note
(type = bibliography)
Includes bibliographical references (p. 208-225).
Subject
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Topic
Geography
Subject
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Topic
Climatology
Subject
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Topic
Seasons
Subject
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Topic
Northern Hemisphere--Climate
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.15802
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ETD_472
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NjNbRU
Identifier
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doi:10.7282/T3C53M9V
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ETD doctoral
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Rights
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The author owns the copyright to this work.
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Copyright protected
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Open
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Gwangyong Choi
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Rutgers University. Graduate School - New Brunswick
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Non-exclusive ETD license
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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