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New Climate Research Findings from University of Liverpool Outlined (Combined use of satellite estimates and rain gauge observations to generate...

July 21, 2014



New Climate Research Findings from University of Liverpool Outlined (Combined use of satellite estimates and rain gauge observations to generate high-quality historical rainfall time series over Ethiopia)

By a News Reporter-Staff News Editor at Global Warming Focus -- Researchers detail new data in Climate Research. According to news reporting out of Liverpool, United Kingdom, by VerticalNews editors, research stated, "Climate data are used in a number of applications including climate risk management and adaptation to climate change. However, the availability of climate data, particularly throughout rural Africa, is very limited."

Our news journalists obtained a quote from the research from the University of Liverpool, "Available weather stations are unevenly distributed and mainly located along main roads in cities and towns. This imposes severe limitations to the availability of climate information and services for the rural community where, arguably, these services are needed most. Weather station data also suffer from gaps in the time series. Satellite proxies, particularly satellite rainfall estimate, have been used as alternatives because of their availability even over remote parts of the world. However, satellite rainfall estimates also suffer from a number of critical shortcomings that include heterogeneous time series, short time period of observation, and poor accuracy particularly at higher temporal and spatial resolutions. An attempt is made here to alleviate these problems by combining station measurements with the complete spatial coverage of satellite rainfall estimates. Rain gauge observations are merged with a locally calibrated version of the TAMSAT satellite rainfall estimates to produce over 30-years (1983-todate) of rainfall estimates over Ethiopia at a spatial resolution of 10km and a ten-daily time scale. This involves quality control of rain gauge data, generating locally calibrated version of the TAMSAT rainfall estimates, and combining these with rain gauge observations from national station network. The infrared-only satellite rainfall estimates produced using a relatively simple TAMSAT algorithm performed as good as or even better than other satellite rainfall products that use passive microwave inputs and more sophisticated algorithms."

According to the news editors, the research concluded: "There is no substantial difference between the gridded-gauge and combined gauge-satellite products over the test area in Ethiopia having a dense station network; however, the combined product exhibits better quality over parts of the country where stations are sparsely distributed."

For more information on this research see: Combined use of satellite estimates and rain gauge observations to generate high-quality historical rainfall time series over Ethiopia. International Journal of Climatology, 2014;34(7):2489-2504. International Journal of Climatology can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; International Journal of Climatology - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1097-0088)

Our news journalists report that additional information may be obtained by contacting T. Dinku, University of Liverpool, Sch Environm Sci, Liverpool L69 3BX, Merseyside, United Kingdom. Additional authors for this research include K. Hailemariam, R. Maidment, E. Tarnavsky and S. Connor.

Keywords for this news article include: Europe, Liverpool, United Kingdom, Climate Research

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Global Warming Focus


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