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Modifications to fix the discrepancies between observed baseline climatology and future change in sunshine and vapour pressure

Stephens, Ag and Jones, Phil (2011) Modifications to fix the discrepancies between observed baseline climatology and future change in sunshine and vapour pressure. Technical Report. UKCP09.

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Abstract

In September 2010, a UKCP09 user brought to our attention that the outputs from the Weather Generator showed unrealistic changes in future sunshine hours when compared to changes in future cloud cover. The University of East Anglia (UEA), British Atmospheric Data Centre (BADC) and the Met Office Hadley Centre have investigated the issue and this document explains where the problem comes from and how it can be rectified. It is important to note that the problem does not stem from errors in either the probabilistic data or the Weather Generator (WG). It is due to the choice of observed baseline climatology used in generating change factors from the probabilistic projections to drive the Weather Generator. A related issue also occurs with vapour pressure, but the effect is smaller.

Item Type: Monograph (Technical Report)
Subjects: Atmospheric Sciences
Meteorology and Climatology
Depositing User: Miss Kate Winfield
Date Deposited: 15 Sep 2017 12:06
Last Modified: 15 Sep 2017 14:16
URI: http://cedadocs.ceda.ac.uk/id/eprint/1342

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