Global climatology of rainfall rates and lifetime accumulated rainfall in tropical cyclones: Influence of cyclone basin, cyclone intensity and cyclone size

Article


Lavender, Sally L. and McBride, John L.. 2021. "Global climatology of rainfall rates and lifetime accumulated rainfall in tropical cyclones: Influence of cyclone basin, cyclone intensity and cyclone size." International Journal of Climatology. 41 (S1), pp. E1217-E1235. https://doi.org/10.1002/joc.6763
Article Title

Global climatology of rainfall rates and lifetime accumulated rainfall in tropical cyclones: Influence of cyclone basin, cyclone intensity and cyclone size

ERA Journal ID1969
Article CategoryArticle
AuthorsLavender, Sally L. (Author) and McBride, John L. (Author)
Journal TitleInternational Journal of Climatology
Journal Citation41 (S1), pp. E1217-E1235
Number of Pages19
Year2021
PublisherJohn Wiley & Sons
Place of PublicationUnited Kingdom
ISSN0899-8418
1097-0088
Digital Object Identifier (DOI)https://doi.org/10.1002/joc.6763
Web Address (URL)https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/joc.6763
Abstract

Seventeen years of 3-hr, 0.25° resolution, precipitation data from the Tropical Rainfall Measurement Mission (TRMM) multi-satellite precipitation analysis (TMPA) product are used to develop a global climatology of precipitation in tropical cyclones (TCs). Due to very large SDs for rainfall in each stratification by intensity class or cyclone basin, our methodology concentrates on frequency distributions and percentage representation in different rainfall rate categories. The stratifications reveal that the TC rainfall climatologies are dependent on three inter-related factors: TC intensity, TC size and TC basin. The interdependence of the three is examined. The distributions of TC intensity classes in the different basins are not a significant contributor to the fact that certain basins (Northwest Pacific, North Atlantic) have higher TC rainfall rates than other basins (Northeast Pacific, South Indian). In contrast to this, the distributions of TC size classes between basins are a significant contributor to why some basins are wetter than others. A climatology is also presented of lifetime accumulated rainfall (LAR) in TCs. The record LAR belongs to hurricane Ivan in 2004, with 300 km3 of rain over the 0–350 km radius, and 432 km3 over 0–500 km. The largest LAR values occur almost exclusively in two cyclone basins: The Northwest Pacific and the North Atlantic. Not unexpectedly, LAR is determined primarily by TC duration, which accounts for around 70% of the variance. Examination of the full 17-year dataset reveals a decreasing trend in both median and extreme TC rainfall rates in all basins except the Northeast Pacific. However, mechanisms responsible for this decrease are yet to be identified and may be primarily due to the sample size or data inhomogeneities. The difference between the trends and those expected from physical principles is a concern which we hope will be taken up by other investigators.

Keywordsclimatology, cyclone intensity, cyclone size, rainfall, trends, tropical cyclone
ANZSRC Field of Research 2020370202. Climatology
Byline AffiliationsCentre for Applied Climate Sciences
University of Melbourne
Institution of OriginUniversity of Southern Queensland
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https://research.usq.edu.au/item/q5x61/global-climatology-of-rainfall-rates-and-lifetime-accumulated-rainfall-in-tropical-cyclones-influence-of-cyclone-basin-cyclone-intensity-and-cyclone-size

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