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rainbow effect. They are commonly associated with Cirrus clouds where ice crystals readily form. Circumzenithal arcs are actually quite common as these types of clouds occur throughout the year, however we only sometimes see them as they are usually obscured by clouds underneath. Circumzenithal arc

, the increase in the resolution leads to a loss of compensating errors and thus increases the temperature bias compared to the lower resolution version. We reformulate some of the sub–grid scale physics parameterisations and model chemistry which produces an improved representation of cloud cover

cloud amount Hourly 75 22. Medium cloud amount Hourly 74 23. Low cloud amount Hourly 73 24. Total cloud Hourly 71 25. Convective cloud amount Hourly 72 26. Convective cloud base (hPa) Hourly 153 27. Convective cloud top (hPa) Hourly 154 28. Cloud fraction (below 1000ft ASL) Hourly 207 29. Height lowest

region. From this viewpoint at 35,000 km above the Equator the extent of the fog can clearly be seen. Using data from channels detecting radiation at visible and near infra-red wavelengths we can produce an image that is close to true colour, however ice clouds and snow on the ground appear

We know that fog is essentially a very low-lying cloud, and that for clouds to form the air must be cooled to a point where its moisture condenses out into a visible cloud. The cooling normally occurs as air rises, but in the case of fog we have to wait for the air to cool down to its fog point

Leader pack Sessions 1-3 What is temperature? What is wind? What are clouds? Measuring the weather VIRTUAL Science Camp 2021 Thank you for joining us for the first Virtual Science Camp 2021! Since 2013 we have welcomed over 1,500 young people to Met Office HQ for our Science Camps. However, due

-colour image highlights where snow is lying on the ground. They are created using five channels in the near-infra-red part of the spectrum so things look a little different to what the human eye would see. Snow can be easily differentiated from the white cloud as it now appears in a bright orange

was northeasterly Force 45. 3. From the evening of the 18th the overcast cloud thickened and the height of its base was under 500 feet throughout the 19th till late in the evening of that day. Winds were Northeasterly Force but increased to Force 6 and .5 7 during the afternoon and evening of the 19th

Its primary uses are for the modelling of clouds and atmospheric flows. The results of these simulations help us to develop the physics parametrizations in the Unified Model. LEM use and collaboration A number of process studies have been carried out using the LEM, including those within the GASS

2024 2024-11-27 Weather: Any overnight fog in the valleys will be slow to clear, forming again from dusk. Otherwise a dry day with some good spells of sunshine. Chance of cloud-free hill tops above 700m: 90% Low cloud and visibility: Good visibility on the tops with little in the way of summit cloud