North Pacific tropical cyclones and teleconnections
Approved for public release, distribution is unlimited === This thesis investigated the hypothesis that variations in tropical cyclone (TC) activity in the western North Pacific (WNP) may affect the teleconnection between the tropical WNP and North America. The teleconnection patterns of the 500 hPa...
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ndltd-nps.edu-oai-calhoun.nps.edu-10945-21912017-05-24T16:07:35Z North Pacific tropical cyclones and teleconnections Budzko, David C. Chang, C.-P. Harr, Patrick A. Naval Postgraduate School (U.S.) Department of Meteorology Tropical meteorology North Pacific Ocean Cyclones Tropics Cyclone forecasting Climatology Tropical cyclones Summertime telecommunications Approved for public release, distribution is unlimited This thesis investigated the hypothesis that variations in tropical cyclone (TC) activity in the western North Pacific (WNP) may affect the teleconnection between the tropical WNP and North America. The teleconnection patterns of the 500 hPa geopotential height between a base point in the WNP (20 N 115 E) and a domain over North America (30 - 45 N, 70 -90 W) from 1951-2001 were examined. The 25 most active and the 25 least active TC years for two regions with the highest climatological average of TC activity, near the Philippines and Taiwan, respectively, were compared to determine if stronger teleconnection patterns occur during the more active years. For both regions, the correlation pattern is significant during active years and insignificant during inactive years, with the results based on TC activity in the Philippines region showing a larger difference. An analysis of 500 hPa mean winds showed weaker winds in the midlatitudes during active TC years when the teleconnection is stronger, which suggests that the teleconnection may consist mainly of Lau and Weng's (2000) zonally-elongated mode (Mode 1). Further cross correlations of the geopotential height and TC frequency parameters with the tropical eastern and western Pacific sea-surface temperatures (SST's) showed a significant correlation between TC activity and tropical eastern Pacific SST's, but the North America-WNP correlation is unlikely to be a result of a direct influence of SST's on the two regions. Captain, United States Air Force March 2005 2012-03-14T17:34:26Z 2012-03-14T17:34:26Z 2005-03 Thesis http://hdl.handle.net/10945/2191 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted. xiv, 54 p. : ill. (some col.), col. maps application/pdf Monterey, California. Naval Postgraduate School |
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Tropical meteorology North Pacific Ocean Cyclones Tropics Cyclone forecasting Climatology Tropical cyclones Summertime telecommunications |
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Tropical meteorology North Pacific Ocean Cyclones Tropics Cyclone forecasting Climatology Tropical cyclones Summertime telecommunications Budzko, David C. North Pacific tropical cyclones and teleconnections |
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Approved for public release, distribution is unlimited === This thesis investigated the hypothesis that variations in tropical cyclone (TC) activity in the western North Pacific (WNP) may affect the teleconnection between the tropical WNP and North America. The teleconnection patterns of the 500 hPa geopotential height between a base point in the WNP (20 N 115 E) and a domain over North America (30 - 45 N, 70 -90 W) from 1951-2001 were examined. The 25 most active and the 25 least active TC years for two regions with the highest climatological average of TC activity, near the Philippines and Taiwan, respectively, were compared to determine if stronger teleconnection patterns occur during the more active years. For both regions, the correlation pattern is significant during active years and insignificant during inactive years, with the results based on TC activity in the Philippines region showing a larger difference. An analysis of 500 hPa mean winds showed weaker winds in the midlatitudes during active TC years when the teleconnection is stronger, which suggests that the teleconnection may consist mainly of Lau and Weng's (2000) zonally-elongated mode (Mode 1). Further cross correlations of the geopotential height and TC frequency parameters with the tropical eastern and western Pacific sea-surface temperatures (SST's) showed a significant correlation between TC activity and tropical eastern Pacific SST's, but the North America-WNP correlation is unlikely to be a result of a direct influence of SST's on the two regions. === Captain, United States Air Force |
author2 |
Chang, C.-P. |
author_facet |
Chang, C.-P. Budzko, David C. |
author |
Budzko, David C. |
author_sort |
Budzko, David C. |
title |
North Pacific tropical cyclones and teleconnections |
title_short |
North Pacific tropical cyclones and teleconnections |
title_full |
North Pacific tropical cyclones and teleconnections |
title_fullStr |
North Pacific tropical cyclones and teleconnections |
title_full_unstemmed |
North Pacific tropical cyclones and teleconnections |
title_sort |
north pacific tropical cyclones and teleconnections |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
Marc |
url |
http://hdl.handle.net/10945/2191 |
work_keys_str_mv |
AT budzkodavidc northpacifictropicalcyclonesandteleconnections |
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