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  • Recent Gallery Photos

    St Ives

    A short break from the very unsettled weather last week

    knocker
    knocker | 
    Non-weather related photos

    IMG_0807.JPG

    mike57
    mike57 | 
    Cloud images 2

    20200209_131518.jpg

    mike57
    mike57 | 
    Cloud images 1

    Moonset 8th February 2020

    Weather-history
    Weather-history | 
    Non-weather related photos

    Moonset 8th February 2020

    Weather-history
    Weather-history | 
    Non-weather related photos

  • Popular learning topics

    Gwo And Global Angular Momentum

    Ok I will start a new thread for dicussions along this line and perhaps I will draw on some ideas expressed in the stratospheric thread and artic sea ice thread. I guess you would be the best person to explain all this GP but for those who don't know this thread is about global angular momentum and how it oscialltes up and down (Global Wind Oscillation) along the lines discussed by Ed Berry. Angular momentum is of course a measure of the turning force in the winds, so could perhaps be consi

    BrickFielder
    BrickFielder | 
    Teleconnections 76

    UK Winter Setups

    A revised version of the earlier "Winter Snow Setups/Non-Snow Setups" topics, this goes through the range of winter setups we can get. As in summer, the main determining factors in what sort of winter weather we get are the positioning and strength of the jet stream. A strong jet stream means that depressions will frequently move from west to east, giving a "zonal" pattern over the UK. Because the Atlantic is relatively warm and moist, assisted by the warm North Atlantic Drift, zonal types

    Thundery wintry showers
    Thundery wintry showers | 
    The Basics

    The Arctic Oscillation (AO)

    The Arctic Oscillation Arctic Oscillation is an important lead on expected winter conditions in the Northern Hemisphere, loosely described as negative ( colder ) positive ( milder).  The image below gives you a great contrast of a winter we will all easily recall with an extremely negative AO and a little further back a winter at the opposite end of the scale.   When considering the overall forecast for Winter it is important to note any variables which provide clues as to which

    lorenzo
    lorenzo | 
    The Basics

    INDEX OF RESEARCH TOPICS (each topic follows below)

    The Research Section provides easy access to numerous research papers and articles. These are organised into topic headings. Just click on the topic heading below to go straight to the list of Papers & Articles under that topic.  African Easterly Waves (AEW) Arctic; Antarctic; Arctic Warming/Amplification Arctic Oscillation (AO) Atlantic Meridional Overturning Circulation (AMOC) Atlantic Meridional Mode (AMM) / Atlantic Multidecadal Oscillation (AMO) / Atlantic Multidecadal Vari

    Blessed Weather
    Blessed Weather | 
    Research

    MJO, Rossby and Kelvin Waves

    The MJO is a major contributor to the global weather patterns, so for those who want to understand a little bit more about it here is a brief overview of my current understanding of the MJO and Rossby and Kelvin Waves. First lets talk a little bit about waves or more specifically Rossby and Kelvin waves. These can occur both in the Atmosphere and in the Ocean and it is important to be clear about the difference between the two. Oceanic Rossby waves take the form of slight height change

    BrickFielder
    BrickFielder | 
    Teleconnections

    What are Noctilucent Clouds?

    Noctilucent clouds are visible in June but rare enough to cause excitement. These high ice crystal clouds can only be seen in the midsummer twilight. Once the sun comes out the light is too strong for these delicate, pale threads to be seen, they need the semi-darkness. Usually, cloud viewed in high latitudes, they were seen in mid-June 2018 in Norfolk and the Netherlands with brilliant displays over northern Britan and Northern Ireland.  Read the full article here: https://www.netweather.t

    Paul
    Paul | 
    The Basics 2

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