A synthesis of hourly and daily precipitation extremes in different climatic regions

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dc.contributor.author Barbero, Renaud
dc.contributor.author Fowler, Hayley J.
dc.contributor.author Blenkinsop, Stephen
dc.contributor.author Westra, Seth
dc.contributor.author Mishra, Vimal
dc.date.accessioned 2019-09-18T10:12:53Z
dc.date.available 2019-09-18T10:12:53Z
dc.date.issued 2019-12
dc.identifier.citation Barbero, Renaud; Fowler, Hayley J.; Blenkinsop, Stephen; Westra, Seth and Mishra, Vimal, "A synthesis of hourly and daily precipitation extremes in different climatic regions", Weather and Climate Extremes, DOI: 10.1016/j.wace.2019.100219, vol. 26, Dec. 2019. en_US
dc.identifier.issn 2212-0947
dc.identifier.uri http://dx.doi.org/10.1016/j.wace.2019.100219
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/4829
dc.description.abstract Climatological features of observed annual maximum hourly precipitation have not been documented systematically compared to those on daily timescales due to observational limitations. Drawing from a quality-controlled database of hourly records sampling different climatic regions including the United States, Australia, the British Isles, Japan, India and peninsular Malaysia over the 1950�2016 period, we examined climatological features of annual maximum precipitation (AMP) across timescales ranging from 1-hr (AMP1?hr) to 24-hr (AMP24?hr). Our analysis reveals strong relations between the magnitude of AMP and the climatological average annual precipitation (AAP), with geographic variations in the magnitude of AMP24?hr across topographic gradients not evident in AMP1?hr. Most AMP1?hr are found to be embedded within short-duration storms (>70% of AMP1?hr are embedded within 1�5?h storms), especially in regions with low AAP and in the tropical zone. Likewise, most AMP24?hr are found to be the accumulation of a very limited number of wet hours in the 24-h period (>80% of AMP24?hr are due to storms lasting <15?h) across many parts of the sampled regions, highlighting the added-value of hourly data in estimating the actual precipitation intensities. The seasonal distribution of AMP may change across different timescales at a specific location, reflecting the prevalence of different seasonal triggering mechanisms. We also find that most AMP1?hr occur preferentially in late afternoon to late evening, slightly later than the usual mid-to-late afternoon peak in the mean precipitation intensity. Finally, analysis of atmospheric instability, realized through the convection available potential energy (CAPE), reveals that CAPE is higher before AMP1?hr with respect to AMP24?hr, although the response of precipitation intensity seems to saturate at higher CAPE levels, a feature evident both in the tropical and extratropical zones. This study provides insights on climatological features of hourly precipitation extremes and how they contrast with the daily extremes examined in most studies.
dc.description.statementofresponsibility by Renaud Barbero, J. Fowler Hayley, Stephen Blenkinsop, Seth Westra and Vimal Mishra
dc.format.extent vol. 26
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Hourly precipitation en_US
dc.subject Daily precipitation en_US
dc.subject Precipitation intensity en_US
dc.subject Precipitation duration en_US
dc.subject Seasonal cycle en_US
dc.subject Diurnal cycle en_US
dc.subject CAPE en_US
dc.title A synthesis of hourly and daily precipitation extremes in different climatic regions en_US
dc.type Article en_US
dc.relation.journal Weather and Climate Extremes

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