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Author: Rebecca Emerton

Hydrometeorological forecast verification: the detail matters!

Hydrometeorological forecast verification: the detail matters!

Contributed by Seonaid Anderson, CEH.  Spending time and effort developing a novel hydrological ensemble prediction system, demonstrating its value, comparing with existing systems, justifying all that effort… there are many reasons why we verify our ensemble prediction systems. Before we dive into the number crunching, a few obvious questions need to be asked. What period to use for evaluation? This is often as long as possible, while maintaining relevance to the current application and subject to the usual computing constraints. What…

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Data Drought and Data Flood

Data Drought and Data Flood

Contributed by Mark Trigg*.  It’s hot, and very, very dry. The rains have failed, and the animals are dying. Around the table people are concerned that it will be people dying next. The cycle seems to repeat every 10 years and the response is exactly the same, every time – we must do something and save lives. “Drill more boreholes and put in big pumps and generators”, someone cries, “no matter the cost!”. A timid voice rises above the ongoing…

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How model uncertainty, diagnostics & information theory are interconnected in earth sciences – Interview with Hoshin Gupta

How model uncertainty, diagnostics & information theory are interconnected in earth sciences – Interview with Hoshin Gupta

Contributed by Ilias Pechlivanidis.  Hoshin Gupta’s work is among the most highly cited in the hydrological scientific field, and has received a number of awards and medals, including the 2014 EGU Dalton Medal and 2017 AMS RE Horton Lecture award. Hoshin has for many years been interested in a deeper understanding of models and data to be better used to enhance the learning process of how dynamical environmental systems work. In addition, particularly to many young researchers, Hoshin is well…

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Improving Hydro-Met services in developing countries

Improving Hydro-Met services in developing countries

Contributed by Florian Pappenberger, ECMWF.  It is in the DNA of every HEPEX-er to believe that better hydrological forecasts contribute to human wellbeing and economic prosperity. We also know that the forecasts themselves are not enough and need to be accompanied by adequate warnings and receptive civil societies (amongst many other factors). A particularly important role in ensuring that a forecast has impact, falls to the National Hydro-Meteorological Services (NMHSs). A recent guide by the World Bank focuses on the…

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Large ensemble simulations for the study of extreme hydrological events

Large ensemble simulations for the study of extreme hydrological events

Contributed by Karin van der Wiel, KNMI*. The investigation of extreme hydrological events is often limited by the length of observed records or model simulations. For this reason many statistical extrapolation methods have been developed. In a recent GRL paper we advocate a novel method for the study of extreme events, which does not rely on such extrapolations (Van der Wiel et al., 2019). In this blog post I invite you to take a slight step outside the HEPEX world…

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