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18 contents match your search.
Addressing atmospheric composition on all scales: from global, regional, to local and urban.
Start date6 January 1989
Publish Date: 18 May 2016
Human activity has increased the direct warming effect of carbon dioxide (CO₂) in the atmosphere by 50 percent above pre-industrial levels during the past 25 years, according to NOAA's 10th Annual Greenhouse Gas Index . In 2015, the global average CO₂ concentration reached 399 parts per million, increasing by a record amount of almost 3 ppm. From the end of the Ice Age to the beginning of the industrial era, atmospheric carbon dioxide remained remarkably stable at 278 ppm.
Date publication: 2016
The latest analysis of observations from the WMO Global Atmosphere Watch (GAW) Programme.
Publish Date: 12 April 2017
Geneva 12 April 2017 (WMO) - The World Meteorological Organization has issued its first annual Airborne Dust Bulletin, giving an overview of atmospheric dust levels and geographical distribution in 2016. The report is part of efforts to improve observations and warnings of sand and dust storms, which pose serious risks to the environment, human health and economy in arid and semi-Arid regions. The global average Aerosol Optical Depth – a measure of the dust burden - for 2016 was similar to previous years, according to the report, which highlighted particularly severe sand and dust storms in...
Publish Date: 16 May 2017
Recognizing that expanded and improved observations now make possible a broader assessment of global atmospheric chemistry, the WMO Global Atmosphere Watch programme has published a new report on global and regional trends in reactive gases. This group of gases includes such chemicals as surface ozone, nitrogen oxides, carbon monoxide, sulfur dioxide, and volatile organic compounds, many of which are considered to be harmful pollutants. The first issue of the Reactive Gases Bulletin reviews long-term observation data on volatile organic compounds (VOCs) and discusses past and recent trends....
Publish Date: 31 May 2018
GENEVA, 31 May 2018 - In the face of growing health impacts from extreme weather, climate change and air pollution, the World Meteorological Organization (WMO) and World Health Organization (WHO) have agreed to step up joint action to tackle environmental health risks that cause an estimated 12.6 million premature deaths every year.
Publish Date: 5 June 2018
World Environment Day is marked on 5 June to mobilize action in favour of protecting the environment. This year’s theme highlights the need to beat plastic pollution as part of a wider global drive towards a cleaner, healthier planet.
Publish Date: 26 October 2018
Air quality regulations and anti-pollution measures in Europe and North America have had very positive impacts on air quality. Since the year 2000, both average and peak surface ozone concentrations have levelled off and even started to fall at some locations after increasing throughout the twentieth century, according to a new report from the World Meteorological Organization.
Publish Date: 20 November 2018
Levels of heat-trapping greenhouse gases in the atmosphere have reached another new record high, according to the World Meteorological Organization (WMO). There is no sign of a reversal in this trend, which is driving long-term climate change, sea level rise, ocean acidification and more extreme weather.
Publish Date: 8 February 2019
The full Scientific Assessment of Ozone Depletion is now available. It shows that actions taken under the Montreal Protocol have led to decreases in the atmospheric abundance of controlled ozone-depleting substances (ODSs) and the start of the recovery of stratospheric ozone.