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Copernicus contributed to research showing reduced ozone values in the free troposphere due to COVID-19 crisis | |
admin | |
2021-02-16 | |
发布年 | 2021 |
语种 | 英语 |
国家 | 欧洲 |
领域 | 气候变化 |
正文(中文) | The Copernicus Atmosphere Monitoring Service (CAMS) has contributed to the newly-released study led by the German Meteorological Service Deutscher Wetterdienst. The study sheds light on highly unusual low ozone values in the free troposphere in the Northern Hemisphere and suggests that reduced emission due to COVID-19 restrictions have caused ozone reductions between 1 and 8 kilometres altitude. CAMS is implemented by the European Centre for Medium-Range Weather Forecasts on behalf of the European Commission. Richard Engelen, Deputy Director of the Copernicus Atmosphere Monitoring Service, comments: “The COVID-19 pandemic led to lockdown measures around the globe, which had a significant effect on our emissions. For example, less transport and aviation meant less fuel was burnt and less emission were released into the atmosphere. This caused lower concentration of nitrogen oxides, which are main drivers for photochemical reactions in the atmosphere. Low concentrations of nitrogen oxides in the free troposphere meant low photochemical production, which resulted in less ozone.” “Our CAMS reanalysis data contributed to the study by showing that the low ozone values, as observed by the balloon sonde observations, could not be explained by year-to-year changes in the meteorological conditions, which led to the conclusion that reduced emissions are likely the main cause”, he adds. Whereas in the stratosphere ozone plays a key role to protect life on the Earth’s surface from harmful and dangerous UV-radiation, ozone in the troposphere is a pollutant as well as a major greenhouse gas. Ideally, there should be a lot of ozone in the stratosphere, and just a little in the troposphere. Human activities, however, have resulted in a decrease of stratospheric ozone over the last century, and in increases of tropospheric ozone. ![]() You can access the DWD press release here: https://www.dwd.de/presse You can access the study by DWD here: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL091987 CAMS microsite with information air quality in support of the COVID-19 crisis: https://atmosphere.copernicus.eu/european-air-quality-information-support-covid-19-crisis * This image has been corrected since the Press Statement was sent out. Notes to EditorsCopernicus is the European Union’s flagship Earth observation which operates through six thematic services: Atmosphere, Marine, Land, Climate Change, Security and Emergency. It delivers freely accessible operational data and services providing users with reliable and up-to-date information related to our planet and its environment. The Programme is coordinated and managed by the European Commission and implemented in partnership with the Member States, the European Space Agency (ESA), the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), the European Centre for Medium-Range Weather Forecasts (ECMWF), EU Agencies and Mercator Océan, amongst others. ECMWF operates two services from the EU’s Copernicus Earth observation programme: the Copernicus Atmosphere Monitoring Service (CAMS) and the Copernicus Climate Change Service (C3S). They also contribute to the Copernicus Emergency Management Service (CEMS). The European Centre for Medium-Range Weather Forecasts (ECMWF) is an independent intergovernmental organisation supported by 34 states. It is both a research institute and a 24/7 operational service, producing and disseminating numerical weather predictions to its Member States. This data is fully available to the national meteorological services in the Member States. The supercomputer facility (and associated data archive) at ECMWF is one of the largest of its type in Europe and Member States can use 25 % of its capacity for their own purposes. ECMWF is expanding its location across its Member States for some activities. In addition to an HQ in the UK and Computing Centre in Italy, new offices with a focus on activities conducted in partnership with the EU, such as Copernicus, will be located in Bonn, Germany from Summer 2021. The Copernicus Atmosphere Monitoring Service website can be found at http://atmosphere.copernicus.eu/ |
URL | 查看原文 |
来源平台 | The Copernicus Programme - Atmosphere Monitoring Service |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/315280 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | admin. Copernicus contributed to research showing reduced ozone values in the free troposphere due to COVID-19 crisis. 2021. |
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