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The impact of aerosols on the atmosphere is widely acknowledged as one of the most significant and uncertain aspects of climate change projections. The observed global warming trend is considerably less than expected from the increase in greenhouse gases, and much of the difference can be explained by aerosol effects. Aerosols impact climate through direct scattering and absorption of incoming solar radiation and trapping of outgoing long-wave radiation as well as through alteration of cloud optical properties and the formation of clouds and precipitation.
Publish Date: 5 May 2021
The U.S. National Oceanic and Atmospheric Administration has updated the U.S. Climate Normals to the 1991-2020 baseline period to provide a most recent baseline for climate information and services to climate-sensitive sectors and a standard reference to compare variations in temperature, precipitation etc to the 30-year average.
Start date10 May 2021
End date14 May 2021
Bulletin nº Vol 69 (2) - 2020
Theme: Education and training
Publish Date: 18 November 2020
The urgent response to the COVID-19 pandemic, with the need to reduce in-person events, has required rapid conversion to distance learning delivery options to maintain capacity development goals. However, the WMO Education and Training Office (ETR) recognized the value of distance learning long before the recent dramatic changes to workplaces.
Date6 May 2021
This meeting will be held online
Date28 June 2021
This meeting will be held online.
Global-scale seasonal forecasts, including those of precipitation and surface temperature, are routinely produced by WMO-accredited centres using sophisticated atmosphere-ocean coupled models, which take into account ENSO as well as other...
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Date28 April 2021