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, England and Wales in one day? It's met with raucous ripples of approval. Let's do it in June. It'll be a laugh. And why not raise some money for charity into the bargain? Sorted - now whose round was it... Let's hit the pause button here. The Three Peaks Challenge is Britain's most well-known mountain

away then returning to a level of neutral buoyancy, forms ripples like those in a pond These are known as gravity waves and can be seen here as ripples in the low cloud. The fog evaporated rapidly and was gone by mid-morning so that the UK went on to experience an almost completely cloud-free day

. These are not the large waves that make ships heave up and down, rather, they are the much smaller ripples on the sea surface of wave length 5-20 cm that tend to lie at right angles to the wind direction. By measuring the backscatter at two or more angles of incidence, it is possible to derive the wind

of this ‘dust front’ new clouds form as air is pushed upwards. These in turn can sometimes develop into storms and generate new haboobs in a chain reaction. In the left image ripples, known as gravity waves, can be seen in the airborne dust. Credits:  Image: © Crown copyright, Met Office, Data: EUMETSAT   April

of the dust, and atmospheric gravity waves, appearing as ripples within the dust. This image is created to enable the easy identification of dust that has been lifted into the atmosphere. This is achieved by taking the difference of and combining satellite measurements from different infra-red

or silky appearance with no cloud elements, grains or ripples which distinguishes it from cirrocumulus. Cirrus is of a discontinuous structure and of limited horizontal extent which is the distinction between it and cirrostratus. Dense cirrus patches or tufts of cirrus may contain ice crystals large

‘spider’. Also in this image, near the top edge, there are some ripples in the cloud which are atmospheric gravity waves. Credits: NASA (data), Met Office (image). October 2018: Satellite image of Hurricane Michael shortly after landfall in Florida 10 October 2018 On 10 October 2018 a Major Hurricane

on these colours too and the lower clouds become dark or grey. The reverse is true at dawn when the cirrus is the first to show colouration. It is of a mainly fibrous or silky appearance with no cloud elements, grains or ripples which distinguishes it from cirrocumulus. Cirrus is of a discontinuous

Calm 0.0 1 Light air Ripples with the appearance of scales are formed, but without foam crests 2 0.8 1 to 3 0.3 to 1.5 Light Calm 0.1 (0.1) 2 Light breeze Small wavelets, still short but more pronounced. Crests have a glassy appearance and do not break 5 2.4 4 to 6 1.6 to 3.3 Light Smooth 0.2 (0.3) 3

WISER knowledge reference number WISER0306 Africa: A Key Component Of Climate Change Adaptation Urgently Needs A More Sustainable Approach – New ODI Report - January 2021 WISER knowledge reference number WISER0300 ENACTS Climate Services Initiative Ripples Across East Africa with WISER Support