ORCID Profile
0000-0003-3139-0438
Current Organisation
University of South Australia
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Publisher: IEEE
Date: 2008
Publisher: Elsevier BV
Date: 07-2020
Publisher: IEEE
Date: 02-2007
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 12-2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2011
Publisher: Elsevier BV
Date: 03-2008
Publisher: Springer Science and Business Media LLC
Date: 05-11-2020
Publisher: Elsevier BV
Date: 09-2015
Publisher: IEEE
Date: 12-2007
Publisher: SPIE-Intl Soc Optical Eng
Date: 12-05-2018
Publisher: IEEE
Date: 09-2008
Publisher: IEEE
Date: 12-2018
Publisher: Elsevier BV
Date: 12-2019
Publisher: The Royal Society
Date: 03-2021
Abstract: A large number of recent studies have aimed at understanding short-duration rainfall extremes, due to their impacts on flash floods, landslides and debris flows and potential for these to worsen with global warming. This has been led in a concerted international effort by the INTENSE Crosscutting Project of the GEWEX (Global Energy and Water Exchanges) Hydroclimatology Panel. Here, we summarize the main findings so far and suggest future directions for research, including: the benefits of convection-permitting climate modelling towards understanding mechanisms of change the usefulness of temperature-scaling relations towards detecting and attributing extreme rainfall change and the need for international coordination and collaboration. Evidence suggests that the intensity of long-duration (1 day+) heavy precipitation increases with climate warming close to the Clausius–Clapeyron (CC) rate (6–7% K −1 ), although large-scale circulation changes affect this response regionally. However, rare events can scale at higher rates, and localized heavy short-duration (hourly and sub-hourly) intensities can respond more strongly (e.g. 2 × CC instead of CC). Day-to-day scaling of short-duration intensities supports a higher scaling, with mechanisms proposed for this related to local-scale dynamics of convective storms, but its relevance to climate change is not clear. Uncertainty in changes to precipitation extremes remains and is influenced by many factors, including large-scale circulation, convective storm dynamics andstratification. Despite this, recent research has increased confidence in both the detectability and understanding of changes in various aspects of intense short-duration rainfall. To make further progress, the international coordination of datasets, model experiments and evaluations will be required, with consistent and standardized comparison methods and metrics, and recommendations are made for these frameworks. This article is part of a discussion meeting issue ‘Intensification of short-duration rainfall extremes and implications for flash flood risks’.
Publisher: IEEE
Date: 09-2015
Publisher: IEEE
Date: 04-2007
Publisher: University of Oslo Library
Date: 21-12-2015
Publisher: Elsevier BV
Date: 11-2012
Publisher: IEEE
Date: 2007
Publisher: IEEE
Date: 08-2018
Publisher: No publisher found
Date: 2016
Publisher: IEEE
Date: 04-2015
Publisher: Elsevier BV
Date: 07-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2014
Publisher: World Scientific Pub Co Pte Lt
Date: 23-12-2015
Publisher: Elsevier BV
Date: 04-2014
Publisher: IEEE
Date: 09-2008
Publisher: SPIE-Intl Soc Optical Eng
Date: 17-12-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2015
Publisher: IEEE
Date: 07-2016
Publisher: Wiley
Date: 26-10-2015
DOI: 10.1002/ACS.2640
Publisher: Springer Science and Business Media LLC
Date: 30-04-2020
DOI: 10.1007/S00382-020-05258-7
Abstract: We investigate the global distribution of hourly precipitation and its connections with the El Niño–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.
Publisher: IEEE
Date: 09-2015
Publisher: IEEE
Date: 12-2010
Publisher: IEEE
Date: 11-2015
No related grants have been discovered for Hugh Kennedy.