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Quel est l’état de la couche d’ozone?: Le point sur l’évaluation la plus récente eff ectuée par l’OMM/PNUE
Bulletin, Vol. 64(1). OMM, 2016L’évaluation de l’état de la couche d’ozone réalisée en 2014, la plus récente en date, établit des prévisions concernant le retour aux valeurs d’avant 1980. Sous les latitudes moyennes de l’hémisphère Nord (35-60°N), la concentration d’ozone total est aujourd’hui inférieure d’environ 3,5 % à ce qu’elle était pendant la période 1964-1980. Sous les latitudes moyennes de l’hémisphère Sud (35-60°S), elle est inférieure de 6 % environ. La déperdition plus importante observée dans l’hémisphère Sud est liée au trou qui se forme dans la couche d’ozone au-dessus de l’Antarctique. Après la baisse du tau ...
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Is the Ozone Layer on the Mend? Highlights from the most recent WMO/UNEP Ozone Assessment
Bulletin, Vol. 64(1). WMO, 2015The 2014 Ozone Assessment provides the latest update of the current state of the ozone layer and makes predictions on when the ozone layer will return to 1980 values. In the northern middle latitudes (35-60°N), total ozone is now about 3.5% less than it was in the period from 1964-1980. At southern middle latitudes (35-60°S), it is about 6% less. The larger depletion in the Southern Hemisphere is linked to the Antarctic ozone hole. Following the decline in total ozone during the 1980s and 1990s, the situation has stabilized since 2000. Hidden under the inter-annual variability, there are indic ...
GORMP, 54. Report of the Ninth Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer
WMO, 2014
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Evidence for the effectiveness of the Montreal Protocol to protect the ozone layer
Atmospheric Chemistry and Physics (ACP), Vol. 10. N° 24. Mäder J.A.; Staehelin Johannes; Peter T.; et al. - Copernicus GmbH, 2011The release of man-made ozone depleting substances (ODS, including chlorofluorocarbons and halons) into the atmosphere has led to a near-linear increase in stratospheric halogen loading since the early 1970s, which levelled off after the mid-1990s and then started to decline, in response to the ban of many ODS by the Montreal Protocol (1987). We developed a multiple linear regression model to test whether this already had a measurable effect on total ozone values observed by the global network of ground-based instruments. The model includes explanatory variables describing the influence of var ...
GORMP, 53. Report of the Eighth Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer
WMO, 2011
GORMP, 51. Report of the Seventh Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer
WMO, 2008
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La science de l'ozone 2007 : une contribution canadienne au vingtième anniversaire du Protocole de Montréal
Environnement Canada, 2007Ozone Science 2007: A Canadian contribution to the twentieth anniversary of the Montreal Protocol provides an overview of the Montreal Protocol as a shining example of the power that science and international efforts can have in protecting the environment and changing our behaviour. It provides hope that our response to other serious challenges, such as global warming, will be equally successful. It also provides the lesson that sound science is absolutely necessary to guide the changes needed in societ to safeguard our future. The Protocol demonstrates that the economy, as well as individual ...
Ozone Science 2007 : a canadian contribution to the the twentieth anniversary of the Montreal Protocol
Environment Canada, 2007Ozone Science 2007: A Canadian contribution to the twentieth anniversary of the Montreal Protocol provides an overview of the Montreal Protocol as a shining example of the power that science and international efforts can have in protecting the environment and changing our behaviour. It provides hope that our response to other serious challenges, such as global warming, will be equally successful. It also provides the lesson that sound science is absolutely necessary to guide the changes needed in societ to safeguard our future. The Protocol demonstrates that the economy, as well as individual ...
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Handbook for the Montreal Protocol on substances that deplete the Ozone Layer - seventh edition
UNEP, 2006Since 1991 the publication of the Handbook for the Montreal Protocol on Substances that Deplete the Ozone Layer (1987) has proved to be an invaluable reference source for the decisions the Parties have made in the process of developing the ozone regime. The Handbook itself is published in response to the Parties’ decision (made in 1990) requesting the Secretariat to publish and update regularly a Handbook, setting out the Protocol, as adjusted and amended, together with the decisions of the Parties and other relevant material. Since then, the Protocol has been adjusted on six occasions and ame ...
Capacity building for ozone monitoring in developing countries
WMO, 2006Capacity building for ozone monitoring and research in developing countries and in countries with economies in transition comes from the general commitments anchored in the Vienna Convention. The Parties under the Vienna Convention established the Trust Fund for Research and Systematic Observations for funding activities consistent with the objectives of the Vienna Convention and the recommendations of the Ozone Research Managers’ Meetings. Those aims are also consistent with the Strategy for the Implementation of the Global Atmosphere Watch Programme (GAW) of the World Meteorological Organiza ...
IPCC/TEAP special report on safeguarding the ozone layer and the global climate system, issues related to hydrofluorocarbons and perfluorocarbons: summary for policymakers and technical summary
World Meteorological Organization (WMO) ; United Nations Environment Programme (UNEP); Intergovernmental Panel on Climate Change (IPCC) - IPCC, 2005
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