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ORM11 GAW 271, 271. Report of Part II of the Eleventh Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer (Online Meeting, 19-23 July 2021)
World Meteorological Organization (WMO) ; United Nations Environment Programme (UNEP); Part II of the Eleventh Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer (Online Meeting, 19-23 July 2021) - WMO, 2021
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.
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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 ...
SatFC-G: IR Bands, Excluding Water Vapor
This lesson introduces seven of the ten infrared imager bands on the GOES R-U ABI (Advanced Baseline Imager). It examines the spectral characteristics of each band to facilitate a better understanding of band selection and what each band observes, and to shed light on some of the many potential applications. This lesson is a part of the NWS Satellite Foundation GOES-R Course.
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Vol. 53 No. 1 - February/ Février 2015 - Special issue: Proceedings of the Twenty-Second Quadrennial Ozone Symposium = Numéro spécial: Comptes-rendus du vingt-deuxième Symposium quadriennal sur l'ozone
is an issue of Atmosphere-ocean. Canadian Meteorological and Oceanographic Society, 2015
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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 ...
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.
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
GOES-R ABI: Next Generation Satellite Imaging
This extension of the COMET lesson “GOES-R: Benefits of Next Generation Environmental Monitoring” focuses on the ABI instrument, the satellite's 16-channel imager. With increased spectral coverage, greater spatial resolution, more frequent imaging, and improved image pixel geolocation and radiometric performance, the ABI will bring significant advancements to forecasting, numerical weather prediction, and climate and environmental monitoring. The first part of the lesson introduces the ABI's key features and improvements over earlier GOES imagers. The second section lets users interactively ex ...
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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
Monitoring the Climate System with Satellites
The international science community has identified a set of Essential Climate Variables (ECVs) that should be monitored for measuring the climate system, how it is changing, and its likely impact on future climate. Environmental satellites play an important role in this effort. They are uniquely positioned to provide broad, spatially consistent, and continuous global sampling of many of the ECVs. This module explores the benefits of monitoring the climate system with satellites. We begin by reviewing how satellites observe key atmospheric elements and features that are found in a variety of cl ...
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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Have primary emission reduction measures reduced ozone across Europe?: An analysis of European rural background ozone trends 1996–2005
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 6. Wilson R.C.; Fleming Z.L.; Monks P.S.; et al. - Copernicus GmbH, 2011National and European legislation over the past 20 years, and the modernisation or removal of industrial sources, have significantly reduced European ozone precursor emissions. This study quantifies observed and modelled European ozone annual and seasonal linear trends from 158 harmonised rural background monitoring stations over a constant time period of a decade (1996–2005). Mean ozone concentrations are investigated, in addition to the ozone 5th percentiles as a measure of the baseline or background conditions, and the 95th percentiles that are representative of the peak concentration level ...
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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 ...
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