Spatial Compound Event Spells in Present and Future Climates -Weather Generator vs. Regional Climate Models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F18%3A00493368" target="_blank" >RIV/68378289:_____/18:00493368 - isvavai.cz</a>

Alternative codes found

RIV/86652079:_____/18:00493368

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Spatial Compound Event Spells in Present and Future Climates -Weather Generator vs. Regional Climate Models

Original language description

Weather generators (WGs) are often used to produce input weather data for climate change impact studies.nWhile the single-site generators are commonly used in agriculture, the multi-site generators are preferred fornhydrological experiments. To justify the use of WG in the impact studies, WGs should be validated for theirnability to represent various features of statistical structure of the real-world weather data, especially the featuresnwhich may significantly affect outputs from the impact models. The validation indices may include characteristicsnof (a) probability distribution functions of individual weather variables (mean, variability, quantiles, extremes),n(b) temporal structure (persistence, occurrence of spells of specific weather type), (c) spatial structure (onlynfor the spatial WGs), and (d) relationships between variables. Having been validated, the WG may be used tonproduce arbitrarily long weather series representing the baseline climate for use in the impact studies. To produce weather series representing the future climate, the generators parameters are typically modified by climate change scenarios.nThis contribution focuses on the results obtained by the parametric spatial weather generator SPAGETTA andncompares its performance with the results based on the ensemble of RCM simulations available from the CORDEX database. In the first part, the WG and RCMs are validated for their ability to reproduce spatial temperature and precipitation patterns focusing on compound temperature-precipitation event spells: spells of spatially extensive hot-dry, hot-wet, cold-dry and cold-wet weather.In the second part, the spells are analysed from both WG-based synthetic series (WG parameters are modified by RCM-based climate change scenarios) and RCM future climate simulations. The experiment is made within the frame of projects 16-04676S and 18-15958S sponsored by the Czech Science Foundation.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10510 - Climatic research

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů