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Report on the Unexpected Emissions of CFC-11 (WMO-No. 1268)
The Report was written by the Scientific Assessment Panel to the Montreal Protocol on Substances that Deplete the Ozone Layer. CFC-11 (CCl3F) was reportedly fully controlled under the Montreal Protocol since 2010. However, a 2018 scientific paper revealed that instead of decreasing, CFC-11 emissions were increasing. In reaction, the Protocol parties agreed to Decision XXX/3: Unexpected emissions of trichlorofluoromethane (CFC-11). This Report addresses: current and past observations of CFC-11 atmospheric abundances; information on the CFC-11 global and regional emission increase and subsequent ...
Scientific Assessment of Ozone Depletion: 2018 (GORMP 58)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2018The Assessment documents the advances in scientific understanding of ozone depletion reflecting the thinking of the many international scientific experts who have contributed to its preparation and review. These advances add to the scientific basis for decisions made by the Parties to the Montreal Protocol. It is based on longer observational records, new chemistry- climate model simulations, and new analyses.
Scientific Assessment of Ozone Depletion: 2014 - Twenty Questions and Answers about the Ozone Layer: 2014 update (GORMP 56)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2015To help maintain a broad understanding of the relationship between ozone depletion, ODSs, and the Montreal Protocol, this component of the Scientific Assessment of Ozone Depletion: 2014 presents 20 questions and answers about the often-complex science of ozone depletion. Most questions and answers are updates of those presented in previous Ozone Assessments, and a few have been expanded to address newly emerging issues. The questions address the nature of atmospheric ozone, the chemicals that cause ozone deple tion, how global and polar ozone depletion occur, the extent of ozone depletion, the ...
Scientific Assessment of Ozone Depletion: 2014 - Assessment for Decision-Makers (GORMP 55)
The present document will be part of the information upon which the Parties to the United Nations Montreal Protocol will base their future decisions regarding ozone-depleting substances, their alternatives, and protection of the ozone layer. It is the latest in a long series of scientific assessments that have informed the Parties.
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Ozone-depleting substances 2012
EEA, 2013Aggregated data reported by companies on the import, export, production, destruction and feedstock and process agent use of ozone-depleting substances in the European Union – SUMMARY
Satellite Monitoring of Atmospheric Composition
Satellite monitoring of atmospheric composition provides important information for a number of applications, including stratospheric ozone monitoring, long-range pollutant transport, biomass burning, air quality monitoring and forecasting, and climate change. This module provides an overview of the use of satellites in these application areas, the measurement techniques used, and the development of related operational services. In addition, the module covers a short history of European and U.S. satellite missions, as well as a look at future missions planned for monitoring atmospheric composit ...
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Air & Climate: conversations about molecules and planets, with humans in between
European Commission, 2012This is a collection of conversations with some of the ‘fathers’ of air pollution and climate change science. Through careful observation and a mix of intuition and critical thought, they have uncovered some of the workings of our planet: its atmosphere and climate. They were generally driven by curiosity and gradually by a concern that mankind might indeed have a devastating impact on Earth and the life it hosts. Their findings were so important that they could not stay in the ivory tower of scientific research. They personally reached out to decision makers and the public at large because in ...
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Multi-scale modeling study of the source contributions to near-surface ozone and sulfur oxides levels over California during the ARCTAS-CARB period
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Huang M.; Carmichael Gregory R.; Spak S.N.; et al. - Copernicus GmbH, 2011Chronic high surface ozone (O3) levels and the increasing sulfur oxides (SOx = SO2+SO4) ambient concentrations over South Coast (SC) and other areas of California (CA) are affected by both local emissions and long-range transport. In this paper, multi-scale tracer, full-chemistry and adjoint simulations using the STEM atmospheric chemistry model are conducted to assess the contribution of local emission sourcesto SC O3 and to evaluate the impacts of transported sulfur and local emissions on the SC sulfur budgetduring the ARCTAS-CARB experiment period in 2008. Sensitivity simulations quantify c ...
Scientific Assessment of Ozone Depletion: 2010 - Executive summary (GORMP 52)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2011It has been recognized since the 1970s that a number of compounds emitted by human activities deplete stratospheric ozone. The montreal Protocol on Substances that Deplete the Ozone layer was adopted in 1987 to protect global ozone and, consequently, protect life from increased ultraviolet (UV) radiation at Earth’s surface. Chlorine- and brominecontaining substances that are controlled by the montreal Protocol are known as ozone-depleting substances (ODSs).
ODSs are responsible for the depletion of stratospheric ozone observed in polar regions (for example, the “ozone hole” above An ...
Scientific Assessment of Ozone Depletion: 2010 (GORMP 52)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2011It has been recognized since the 1970s that a number of compounds emitted by human activities deplete stratospheric ozone. The montreal Protocol on Substances that Deplete the Ozone layer was adopted in 1987 to protect global ozone and, consequently, protect life from increased ultraviolet (UV) radiation at Earth’s surface. Chlorine- and brominecontaining substances that are controlled by the montreal Protocol are known as ozone-depleting substances (ODSs).
ODSs are responsible for the depletion of stratospheric ozone observed in polar regions (for example, the “ozone hole” above An ...
Scientific Assessment of Ozone Depletion, 2010: Twenty Questions and Answers about the Ozone Layer: 2010 update (GORMP 52)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2011To help maintain a broad understanding of the relationship between ozone depletion, ODSs, and the Montreal Protocol, this component of the Scientific Assessment of Ozone Depletion: 2010 presents 20 questions and answers about the often-complex science of ozone depletion. Most questions and answers are updates of those presented in previous Ozone Assessments, while others have been added or expanded to address newly emerging issues. The questions address the nature of atmospheric ozone, the chemicals that cause ozone depletion, how global and polar ozone depletion occur, the success of the Mont ...
CAWCR technical report, 43. Exploring the co-benefit of electric vehicle uptake and ozone pollution reduction in Sydney - Final report.
Given the likely pace of change in the electric vehicle market, it is important that the environmental externalities are identified and quantified. In this report we present the results of a modelling study which investigated how ozone pollution in the Greater Metropolitan Region of Sydney NSW, Australia would respond to the replacement of Sydney’s internal combustion engine (ICE) passenger vehicle fleet with a fleet of electric vehicles. A brief description of the modelling methodology is provided in the next section, and a summary of the modelling outcomes is provided in the following sectio ...
Volcanic Ash: Impacts to Aviation, Climate, Maritime Operations, and Society
This module is the third in the four-part Volcanic Ash series. It provides information on the impacts of an explosive volcanic eruption to aviation, climate, maritime operations and society. The threats, or impacts, from an eruption vary depending on the eruption style, duration and proximity--both in distance and altitude--to the volcano. As you learned earlier, an eruption may bring multiple hazards to urban and rural areas through: Lahars (mudflows) and floods Lava-flow inundation Pyroclastic flows and surge Volcanic ash and bomb fallout Volcanic gases In this module, we'll take a closer lo ...
Scientific Assessment of Ozone Depletion: 2006 - Twenty Questions and Answers about the Ozone Layer: 2006 update (GORMP 50)
World Meteorological Organization (WMO) ; National Oceanic and Atmospheric Administration (NOAA); United Nations Environment Programme (UNEP); et al. - WMO, 2007To help maintain a broad understanding of the relationship between ozone depletion, ODSs, and the Montreal Protocol, this component of the Scientific Assessment of Ozone Depletion: 2006 presents 20 questions and answers about the often-complex science of ozone depletion. Most questions and answers are updates of those presented in previous Ozone Assessments, while others have been added or expanded to address newly emerging issues. The questions address the nature of atmospheric ozone, the chemicals that cause ozone depletion, how global and polar ozone depletion occur, the success of the Mont ...
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