Search results (680)

Introduction At the heart of the Unified Model (UM) lies its dynamical core, that part of the model responsible for solving the equations of large-scale fluid flow in the atmosphere on the model’s discrete mesh. One component of this dynamical core, which just by itself is computationally very

-27 cm were measured in various locations. Photograph taken in Sutton, Surrey (reproduced by permission of Roger White). Previous snowfall The last time widespread snowfalls affected the UK was in February 1991. From the 8th to the 14th, there was over 20 cm of lying snow over the eastern half

evaporating back to the atmosphere where it can form as clouds and re-fall as rain again. In fact, the behaviour of trees and plants can control the amount of water being evaporated and therefore the amount of rain which can subsequently fall. The reason lies in the tiny openings on the leaves

numerical techniques for ocean modelling beyond NEMO? A: This is unlikely to happen as part of ExCALIBUR as NEMO lies at the heart of the modelling system as it stands. If NEMO proved to be completely unfit for purpose after WP1 activity 2 then there could be an element

, shows deposited snow as white, the same colour as the clouds which are also present in this picture. The lower image shows a composite that makes use of some different near-infrared channels where the solar radiation is absorbed strongly by the lying snow, producing a characteristic red colour

within the tail of the distribution), then the exceedance probability is the empirical fraction of model values lying above the observed threshold. If the observed value of the UK summer mean temperature anomaly can be treated as an extreme value, then a Generalised Pareto Distribution (GPD) is fit

be a greater than 10% chance that the real-world response lies outside this range and this likelihood cannot be accurately quantified. • We cannot rule out substantial additional sea level rise associated primarily with dynamic ice discharge from the West Antarctic Ice Sheet. • The estimate for low

. The 27th began very windy, with blustery showers, wintry at times with rain, sleet and snow, coalescing occasionally into longer spells of precipitation, Middleton Hillside (Derbyshire) recording 17 cm of lying snow; the showers began to die away from western areas with sunny spells developing here

of Wight), while bands of rain and showers, some wintry in the north, and isolated thunderstorms crossed the country through the day, Copley (Durham) reporting 11 cm of lying snow. After a fine start to the 19th, with just a few isolated showers over the north-west, rain, sleet and snow spread quickly

anomaly is then added to the HadISST dataset 1989-2002 climatology to give a prediction for September 2010 of 5.5 million square kilometres. Despite the known model deficiencies, it is encouraging that this estimate lies in the range of the June Outlook report projections. Figure 2: GloSea4 forecast