首页|Global distribution of the intensity and frequency of hourly precipitation and their responses to ENSO

Global distribution of the intensity and frequency of hourly precipitation and their responses to ENSO

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  • Springer Nature
We investigate the global distribution of hourly precipitation and its connections with the El Nino-Southern Oscillation (ENSO) using both satellite precipitation estimates and the global sub-daily rainfall gauge dataset. Despite limited moisture availability over continental surfaces, we find that the highest mean and extreme hourly precipitation intensity (HPI) values are mainly located over continents rather than over oceans, a feature that is not evident in daily or coarser resolution data. After decomposing the total precipitation into the product of the number of wet hours (NWH) and HPI, we find that ENSO modulates total precipitation mainly through the NWH, while its effects on HPI are more limited. The contrasting responses to ENSO in NWH and HPI is particularly apparent at the rising branches of the Pacific and Atlantic Walker Circulations, and is also notable over land-based gauges in Australia, Malaysia, the USA, Japan and Europe across the whole distribution of hourly precipitation (i.e. extreme, moderate and light precipitation). These results provide new insights into the global precipitation distribution and its response to ENSO forcing.

ENSOPrecipitation totalNumber of wet hoursHourly precipitation intensityHourly precipitation frequencyWalker circulationHourly precipitation extreme

Li, Xiao-Feng、Blenkinsop, Stephen、Barbero, Renaud、Yu, Jingjing、Lewis, Elizabeth、Lenderink, Geert、Guerreiro, Selma、Chan, Steven、Li, Yafei、Ali, Haider、Herrera, Roberto Villalobos、Kendon, Elizabeth、Fowler, Hayley J.

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Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England|RECOVER, French Natl Res Inst Agr Food & Environm, Aix En Provence, France

Royal Netherlands Meteorol Inst, De Bilt, Netherlands

Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England|Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China

Hadley Ctr, Met Off, FitzRoy Rd, Exeter, Devon, England

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2020

10.1007/s00382-020-05258-7

Climate dynamics: Observational, theoretical and computational research on the climate system

Climate dynamics: Observational, theoretical and computational research on the climate system

SCI
ISSN：0930-7575
年,卷(期)：2020.54(11/12)
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