Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins
In this study, we use Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Climatology Project (GPCP) rainfall data together with historical storm track records to examine the trend of tropical cyclone (TC) rainfall in major ocean basins during recent decades (1980-2007). We find that...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20110022533 2023-05-15T17:29:46+02:00 Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins Lau, K. M. Zhou, Y. P. Unclassified, Unlimited, Publicly available July 2011 application/pdf http://hdl.handle.net/2060/20110022533 unknown Document ID: 20110022533 http://hdl.handle.net/2060/20110022533 Copyright, Distribution as joint owner in the copyright CASI Meteorology and Climatology GSFC.JA.4801.2011 2011 ftnasantrs 2019-07-21T06:25:35Z In this study, we use Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Climatology Project (GPCP) rainfall data together with historical storm track records to examine the trend of tropical cyclone (TC) rainfall in major ocean basins during recent decades (1980-2007). We find that accumulated total rainfall along storm tracks for all tropical cyclones shows a weak positive trend over the whole tropics. However, total rainfall associated with weak storms, and intense storms (Category 4-5) both show significant positive trends, while total rainfall associated with intermediate storms (Category1-3) show a significant negative trend. Storm intensity defined as total rain produced per unit storm also shows increasing trend for all storm types. Basin-wide, from the first half (1980-1993) to the second half (1994-2007) of the data period, the North Atlantic shows the pronounced increase in TC number and TC rainfall while the Northeast Pacific shows a significant decrease in all storm types. Except for the Northeast Pacific, all other major basins (North Atlantic, Northwest Pacific, Southern Oceans, and Northern Indian Ocean) show a significant increase in total number and rainfall amount in Category 4-5 storms. Overall, trends in TC rainfall in different ocean basins are consistent with long-term changes in the ambient large-scale environment, including SST, vertical wind shear, sea level pressure, mid-tropospheric humidity, and Maximum Potential Intensity (MPI). Notably the pronounced positive (negative) trend of TC rainfall in the North Atlantic (Northeast Pacific) appears to be related to the most (least) rapid increase in SST and MPI, and the largest decrease (increase) in vertical wind shear in the region, relative to other ocean basins. Other/Unknown Material North Atlantic NASA Technical Reports Server (NTRS) Indian Pacific |
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NASA Technical Reports Server (NTRS) |
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topic |
Meteorology and Climatology |
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Meteorology and Climatology Lau, K. M. Zhou, Y. P. Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
topic_facet |
Meteorology and Climatology |
description |
In this study, we use Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Climatology Project (GPCP) rainfall data together with historical storm track records to examine the trend of tropical cyclone (TC) rainfall in major ocean basins during recent decades (1980-2007). We find that accumulated total rainfall along storm tracks for all tropical cyclones shows a weak positive trend over the whole tropics. However, total rainfall associated with weak storms, and intense storms (Category 4-5) both show significant positive trends, while total rainfall associated with intermediate storms (Category1-3) show a significant negative trend. Storm intensity defined as total rain produced per unit storm also shows increasing trend for all storm types. Basin-wide, from the first half (1980-1993) to the second half (1994-2007) of the data period, the North Atlantic shows the pronounced increase in TC number and TC rainfall while the Northeast Pacific shows a significant decrease in all storm types. Except for the Northeast Pacific, all other major basins (North Atlantic, Northwest Pacific, Southern Oceans, and Northern Indian Ocean) show a significant increase in total number and rainfall amount in Category 4-5 storms. Overall, trends in TC rainfall in different ocean basins are consistent with long-term changes in the ambient large-scale environment, including SST, vertical wind shear, sea level pressure, mid-tropospheric humidity, and Maximum Potential Intensity (MPI). Notably the pronounced positive (negative) trend of TC rainfall in the North Atlantic (Northeast Pacific) appears to be related to the most (least) rapid increase in SST and MPI, and the largest decrease (increase) in vertical wind shear in the region, relative to other ocean basins. |
format |
Other/Unknown Material |
author |
Lau, K. M. Zhou, Y. P. |
author_facet |
Lau, K. M. Zhou, Y. P. |
author_sort |
Lau, K. M. |
title |
Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
title_short |
Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
title_full |
Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
title_fullStr |
Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
title_full_unstemmed |
Observed Recent Trends in Tropical Cyclone Rainfall Over Major Ocean Basins |
title_sort |
observed recent trends in tropical cyclone rainfall over major ocean basins |
publishDate |
2011 |
url |
http://hdl.handle.net/2060/20110022533 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
CASI |
op_relation |
Document ID: 20110022533 http://hdl.handle.net/2060/20110022533 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766124579353264128 |