Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008
Droughts and tropical cyclones (TCs) are climatologically common events in the southeastern United States, yet little research has examined the potential for TCs to ameliorate drought impacts. Here, we identify the frequency of TCs that abruptly end drought conditions (i.e., drought busters, or DB)...
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ftunivnorthcag:oai:libres.uncg.edu/21463 2024-02-11T10:06:33+01:00 Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 NC DOCKS at Appalachian State University Soule', Peter T. 2012 http://libres.uncg.edu/ir/asu/f/Soule_Peter_2012_Drought_Busting_trop_cyclone_orig.pdf.XX.pdf English eng http://libres.uncg.edu/ir/asu/f/Soule_Peter_2012_Drought_Busting_trop_cyclone_orig.pdf.XX.pdf 2012 ftunivnorthcag 2024-01-27T23:46:09Z Droughts and tropical cyclones (TCs) are climatologically common events in the southeastern United States, yet little research has examined the potential for TCs to ameliorate drought impacts. Here, we identify the frequency of TCs that abruptly end drought conditions (i.e., drought busters, or DB) and determine possible influences of coupled ocean–atmosphere teleconnections on the likelihood of a TC-induced DB (TCDB). Using the HURDAT database and Palmer Drought Severity Indexes from 1950 through 2008, we identified every TCDB for thirty-one climate divisions in the southeastern Atlantic United States. We present the spatial patterns of the total number of TCDBs and the percentage of all droughts ended by TCs using choropleth maps. To determine what teleconnections influenced TCDBs, we used logistic regression analysis and included multiple synoptic-scale circulation indexes as predictor variables. In addition, we used a Fisher’s exact test to examine the association between the North Atlantic Oscillation (NAO) and TCDBs. We found that up to 41 percent of all droughts and at least 20 percent of droughts in three fourths of the climate divisions were ended by TCDBs. NAO was a significant predictor (p = 0.005) in the logistic regression model (x2 = 10.91, p = 0.001), and the Fisher’s exact test showed a signi?cant association between NAO and TCDBs (p = 0.003). An odds-ratio calculation showed that TCDBs are 5.8 times more likely to occur during a negative NAO phase than a positive NAO phase. Other/Unknown Material North Atlantic North Atlantic oscillation University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
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University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
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ftunivnorthcag |
language |
English |
description |
Droughts and tropical cyclones (TCs) are climatologically common events in the southeastern United States, yet little research has examined the potential for TCs to ameliorate drought impacts. Here, we identify the frequency of TCs that abruptly end drought conditions (i.e., drought busters, or DB) and determine possible influences of coupled ocean–atmosphere teleconnections on the likelihood of a TC-induced DB (TCDB). Using the HURDAT database and Palmer Drought Severity Indexes from 1950 through 2008, we identified every TCDB for thirty-one climate divisions in the southeastern Atlantic United States. We present the spatial patterns of the total number of TCDBs and the percentage of all droughts ended by TCs using choropleth maps. To determine what teleconnections influenced TCDBs, we used logistic regression analysis and included multiple synoptic-scale circulation indexes as predictor variables. In addition, we used a Fisher’s exact test to examine the association between the North Atlantic Oscillation (NAO) and TCDBs. We found that up to 41 percent of all droughts and at least 20 percent of droughts in three fourths of the climate divisions were ended by TCDBs. NAO was a significant predictor (p = 0.005) in the logistic regression model (x2 = 10.91, p = 0.001), and the Fisher’s exact test showed a signi?cant association between NAO and TCDBs (p = 0.003). An odds-ratio calculation showed that TCDBs are 5.8 times more likely to occur during a negative NAO phase than a positive NAO phase. |
author |
NC DOCKS at Appalachian State University Soule', Peter T. |
spellingShingle |
NC DOCKS at Appalachian State University Soule', Peter T. Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
author_facet |
NC DOCKS at Appalachian State University Soule', Peter T. |
author_sort |
NC DOCKS at Appalachian State University |
title |
Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
title_short |
Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
title_full |
Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
title_fullStr |
Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
title_full_unstemmed |
Drought-Busting Tropical Cyclones in the Southeastern Atlantic United States: 1950–2008 |
title_sort |
drought-busting tropical cyclones in the southeastern atlantic united states: 1950–2008 |
publishDate |
2012 |
url |
http://libres.uncg.edu/ir/asu/f/Soule_Peter_2012_Drought_Busting_trop_cyclone_orig.pdf.XX.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://libres.uncg.edu/ir/asu/f/Soule_Peter_2012_Drought_Busting_trop_cyclone_orig.pdf.XX.pdf |
_version_ |
1790604345719390208 |