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235 contents match your search.
Publish Date: 17 January 2019
The year 2019 has started where 2018 left off – with extreme weather causing disruption, damage and loss of life. The high impact of these events – some of which are consistent from what we expect as a result of climate change - underline why extreme weather, climate change and environmental risks dominated the World Economic Forum’s annual Global Risks Perception Survey .
Bulletin nº Vol 65 (1) - 2016
Publish Date: 21 March 2016
In pitch dark at 40 below, a research expedition set out to the icy Arctic Ocean in January 2015.Their goal: to better understand ongoing changes in the Arctic due to a shift from an older and thicker ice cover that would survive the summer melt to a younger and thinner one that, to a larger degree, melts away in the summer.
Sand and dust storms are common meteorological hazards in arid and semi-arid regions. They are usually caused by thunderstorms – or strong pressure gradients associated with cyclones – which increase wind speed over a wide area. These strong winds lift large amounts of sand and dust from bare, dry soils into the atmosphere, transporting them hundreds to thousands of kilometres away. Some 40% of aerosols in the troposphere (the lowest layer of Earth’s atmosphere) are dust particles from wind erosion.
Bulletin nº Vol 64 (1) - 2015
Theme: Environmental challenges
Publish Date: 2 March 2015
As atmospheric CO 2 continues to increase, more and more CO 2 enters the ocean, which reduces pH (pH is a measure of acidity, the lower the pH, the more acidic the liquid) in a process referred to as ocean acidification. Declines in surface ocean pH due to ocean acidification are already detectable and accelerating.
WMO coordinates and organizes international research programmes to enhance the ability of its Members to improve weather, climate, water and environmental observations, prediction, service delivery and scientific assessments of regional and global environmental conditions.