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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

are the Northern Lights and what causes them? Author: Press Office 30 May 2025 The Northern Lights, or aurora borealis, are one of nature’s most mesmerising displays. This phenomenon can be seen as waves of colour that ripple across the night sky in hues of green, pink, red, and violet. While often

in the rate of species extinctions, while the planet would lose a vital climate regulation mechanism with climate-damaging teleconnections rippling out across the planet. Ten per cent of the world’s biodiversity is thought to exist within this region. How likely is this? But the Amazon basin is already

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

-blown SSW event, these westerly winds need to reverse and become easterly. At the moment, they are close to zero but have not flipped, and forecasts suggest they may remain weak rather than reversing completely. Why does this matter? A weakened polar vortex can ripple down through the atmosphere over

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

and troughs that alter the downstream weather pattern. In this case, Humberto’s transition from a hurricane to an extra-tropical system was expected to create a ripple in the Jetstream, which in turn would affect the development and track of the next low-pressure system approaching the UK. Even subtle

‘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

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

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 - November 2020 WISER knowledge reference number WISER0299 A key component of climate change adaptation urgently needs