April 2011

In the news

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South Asian Climate Outlook Forum Statement on south-west monsoon / Record stratospheric ozone loss in the Arctic in Spring of 2011 / WMO Hurricane Committee retires Igor and Tomas from list of Atlantic storms / Gabon National Meteorological Service launches new Website

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South Asian Climate Outlook Forum Statement on south-west monsoon

The South Asian Climate Outlook Forum has issued a consensus outlook for the 2011 south-west monsoon rainfall through an expert assessment of the available indications at a meeting 13-15 April in Pune, India.

The outlook, based on the various prevailing global climate conditions and forecasts from different empirical and dynamical climate models, indicates large uncertainty partly because La Niña conditions are expected to weaken to a neutral state over the course of the coming monsoon season. However, the large-scale summer monsoon rainfall over South Asia, for the season as a whole, would most likely be within the normal range.

The outlook indicates slightly enhanced likelihood for below normal rainfall conditions over the northwestern parts and some northeastern parts of South Asia. There is slightly enhanced likelihood of above normal rainfall over the southern parts of South Asia including the islands. Rainfall conditions close to the normal are more likely over the remaining parts of South Asia.

Asia is a large continent with large differences in the climatological settings on a subregional scale. Therefore WMO's Regional Association for Asia recommended sub-regional climate outlook forums devoted to countries having similar climatic characteristics. The South Asian Climate Outlook Forum was established in 2010 is a step in that direction with specific focus on the climate information needs of nations affected by the Asian summer monsoon climate.

Full statement

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Record stratospheric ozone loss in the Arctic in Spring of 2011

Depletion of the ozone layer - the shield that protects life on Earth from harmful levels of ultraviolet rays - has reached an unprecedented level over the Arctic this spring because of the continuing presence of ozone-depleting substances in the atmosphere and a very cold winter in the stratosphere. The stratosphere is the second major layer of the Earth’s atmosphere, just above the troposphere.

The record loss is despite an international agreement which has been very successful in cutting production and consumption of ozone destroying chemicals. Because of the long atmospheric lifetimes of these compounds it will take several decades before their concentrations are back down to pre-1980 levels, the target agreed in the Montreal Protocol on Substances that Deplete the Ozone Layer.

Press release

 

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WMO Hurricane Committee retires Igor and Tomas from list of Atlantic storms

The World Meteorological Organization Hurricane Committee has retired two tropical cyclone names in the Atlantic from the official name rotation because of the deaths and damage they caused in 2010.

The names Igor and Tomas in the Atlantic would have appeared again in 2016 but will no longer be used. In their places will be Ian and Tobias.

The decision was taken at the WMO’s Regional Association for North America, Central America and the Caribbean’s Hurricane Committee meeting in the Cayman Islands 8-12 March 2011. The committee issues the list of potential names for tropical cyclones to be used every six years for both the Atlantic and eastern North Pacific basins.

More on storm naming

 

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Gabon National Meteorological Service launches new Website

The Gabon National Meteorological Service has launched a new Website, Meteo Gabon, at www.meteogabon.maswurong.com

The site, available in French, contains official forecasts for the capital and provinces, as well as maps, photos and background information on agrometeorology, geography and hydrology in Gabon. The site content continues to grow, and plans are underway to add climatology information shortly.

 

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