Emissions changes in 2020 due to Covid19
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<strong>Emissions and climate effects due to the COVID-19 response</strong> Monthly emissions and concentrations for the effects of the Covid-19 pandemic and resulting society response. All scenarios should be compared to the input4MIPS SSP245 baseline https://esgf-node.llnl.gov/search/input4mips/ We provide sector and national emission files as well as the code to create them from mobility data in national_level_lockdown_analysis.zip. Sector csv files have aviation and shipping by nation. National csv files have international aviation and shipping as a separate nation. See https://github.com/Priestley-Centre/COVID19_emissions for more details. The calculations relating these to the emissions netcdf files can be found at https://github.com/rlamboll/2dCOVID19Emissions/ and is detailed in https://gmd.copernicus.org/preprints/gmd-2020-373/. <strong>Description of files</strong> Monthly emissions of aerosols and precursors are saved directly here, zipped folders contain GHG concentrations and NOx emissions from aviation for the effects of the Covid-19 pandemic and resulting society response. All scenarios should be compared to the input4MIPS SSP245 baseline https://esgf-node.llnl.gov/search/input4mips/ Five scenarios are given for departures from the SSP2-4.5 baseline. The baseline is also provided for convenience, with timesteps available corresponding to both the 4-year blip and the 2-year blip. Scenarios depart from baseline after the start of 2020. Monthly concentrations of CO2, CH4 and N2O are provided over 2015-2050. For short-lived species emissions are provided for BC, CO, OC, SO2, NH3, NOx, & NMVOCs. Monthly values for years:2015,2019,2020,2021,2023,2030,2040 and 2050 are provided for the four scenarios and baseline (2-year blip, strong and moderate green recovery and fossil fuel recovery). For the 4-year blip nad 4baseline, the years are 2015,2019,2020,2021,2022, 2023, 2025, 2030,2040 and 2050. The SSP245 baseline is also available from the input4MIPS website. NOx emissions from aviation is provided in a zipped folder, with monthly values for years:2015,2019,2020, 2021, 2022, 2023,2030,2040 and 2050. Two files have these years only, (corresponding to 2-year blip and baseline) and two have data for 2024 too (corresponding to the 4-year blip, or baseline for it). Well-mixed greenhouse gas emissions are provided for North, South and global average concentration of CO2, CH4 and N2O for all months 2015-2050 <strong>For more info</strong> Funding was provided by the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement nos. 820829 (CONSTRAIN) http://constrain-eu.org/ Contact Piers Forster (p.m.forster@leeds.ac.uk) for more details. www.climate.leeds.ac.uk Paper reference is <strong>Forster, P.M., Forster, H.I., Evans, M.J. <em>et al.</em> Current and future global climate impacts resulting from COVID-19. <em>Nat. Clim. Chang.</em> (2020). https://doi.org/10.1038/s41558-020-0883-0</strong>
**新冠疫情防控引发的排放与气候影响** 本数据集涵盖新冠疫情及其引发的社会防控措施所产生的月度排放与浓度数据。所有情景均需与input4MIPS (input4MIPS) 的SSP245基准情景（https://esgf-node.llnl.gov/search/input4mips/）进行对比。我们提供了分部门与分国家的排放文件，以及从`national_level_lockdown_analysis.zip`中的移动出行数据生成这些文件的代码。分部门CSV文件包含按国家分类的航空与航运排放数据；分国家CSV文件则将国际航空与航运作为独立国家进行统计。更多细节可参阅https://github.com/Priestley-Centre/COVID19_emissions。与这些排放NetCDF文件相关的计算方法可在https://github.com/rlamboll/2dCOVID19Emissions/中获取，相关细节已发表于https://gmd.copernicus.org/preprints/gmd-2020-373/。 **文件说明** 本数据集直接存储了气溶胶及其前体物的月度排放数据，压缩文件夹包含新冠疫情及社会防控措施影响下的温室气体（Greenhouse Gas, GHG）浓度与航空氮氧化物（NOₓ）排放数据。所有情景均需与input4MIPS (input4MIPS) 的SSP245基准情景（https://esgf-node.llnl.gov/search/input4mips/）进行对比。本数据集提供了5种偏离SSP2-4.5基准情景的模拟情景，为方便使用，基准情景也同步提供，其时间步长分别对应“2年冲击”与“4年冲击”两种场景。所有情景均自2020年初起偏离基准情景。 数据集提供了2015-2050年的CO₂、CH₄和N₂O月度浓度数据。对于短寿命污染物，提供了黑碳（Black Carbon, BC）、一氧化碳（CO）、有机碳（Organic Carbon, OC）、SO₂、NH₃、NOₓ及非甲烷挥发性有机物（Non-Methane Volatile Organic Compounds, NMVOCs）的排放数据。 针对4种模拟情景与基准情景（包括2年冲击情景、强绿色复苏情景、温和绿色复苏情景以及化石燃料复苏情景），提供了2015、2019、2020、2021、2023、2030、2040及2050年的月度数据。针对4年冲击情景及其基准情景，提供的年份为2015、2019、2020、2021、2022、2023、2025、2030、2040及2050年。SSP245基准情景也可从input4MIPS官网获取。 航空NOₓ排放数据存储于压缩文件夹中，提供的年份为2015、2019、2020、2021、2022、2023、2030、2040及2050年。其中2个文件仅包含上述年份的数据（对应2年冲击情景及其基准情景），另外2个文件额外包含2024年的数据（对应4年冲击情景及其基准情景）。数据集还提供了全球、北半球及南半球平均的CO₂、CH₄和N₂O混合温室气体浓度月度数据，时间跨度为2015-2050年。 **更多信息** 本项目受欧盟地平线2020研究与创新计划资助（资助协议编号：820829，CONSTRAIN项目，http://constrain-eu.org/）。如需更多详情，请联系Piers Forster（邮箱：p.m.forster@leeds.ac.uk），或访问www.climate.leeds.ac.uk。相关论文引用信息如下：**Forster, P.M., Forster, H.I., Evans, M.J. 等. 新冠疫情引发的当前及未来全球气候影响. 《自然·气候变化》(2020). https://doi.org/10.1038/s41558-020-0883-0**
