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or deposition processes were modelled, this is realistic given the long atmospheric lifetimes of the vast majority of gases considered. By dividing the dosage (gs/m 3 ) by the total mass emitted (3600s/hr x 2hr x 1g/s) and multiplying by the geographical area of each grid box (m 2 ), the model output

of future changes in UK-average winter and summer mean temperature and precipitation in the original UKCP Regional ensemble (12 members) and the augmented UKCP Regional ensemble with four additional members driven by CMIP5 GCMs (16 members in total). Future changes are defined as differences between

the region. The average contribution of the rainfall for each season to the annual total is displayed in Figure 2. Figure 1. Left panel: topographic map of South Asia. Source: Adapted from World Maps online 1 . Right panel: Köppen-Geiger climate classifications of South Asia. Source: Peel et al., (2007). 1

a considerable amount of study. Heavy precipitation has been found to contribute an increasing fraction of total precipitation over many of the regions for which good instrumental records are available (Groisman et al. 2005; Alexander et al. 2006; Karl and Knight 1998; Kunkel et al. 2007; Peterson et

climate change signal resulting from increased atmospheric moisture is an important secondary factor. Rainfall totals on the wettest days have increased, this is more strongly linked to climate change. In the future, climate projections for the UK indicate there being a greater risk of heavy

for meteorological purposes. By measuring the delay in signal arrival caused by water vapour in the atmosphere, we can estimate the total water vapour content along the signal’s path. This information is particularly valuable for identifying areas of deep moisture that can trigger thunderstorms

progressed and new airfields and sites opened this number surged and, by 1945, totalled 552. Gathering data from outside the British Isles was far more challenging. Observations were received from neutral and allied nations including Spain, Portugal, the Azores, Iceland, Canada, the US

are also presented for two outer quintile categories (representing rainfall totals above and below the outer quintiles respectively) and are also referred to as the well-above-normal and well-below-normal quintile categories. @ Crown copyright 2015 6 3.1 Forecast Skill The skill of the combined forecasts

were due to the wind, it also brought some very wet weather with over 50mm of rain falling across western upland areas. From 23 to 24 January, 2-day totals (mostly from storm Éowyn) included for example 82.4mm at Achnagart (West Highlands), 62.5mm at Holne (Devon - Dartmoor), 57.0mm at Mickleden

for these figures to change significantly. At this point in the season you’d expect to have seen 68% of the season’s total seasonal average rainfall. At the conclusion of January, the UK has so far seen 89% of the average rainfall for the whole of the season, although much of north-east England