Tropospheric Ozone Assessment Report: Database and metrics data of global surface ozone observations
Tropospheric Ozone Assessment Report: Database and metrics data of global surface ozone observations
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对流层臭氧评估报告：全球表面臭氧观测数据库和指标数据
DOI：
10.1525/elementa.244
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发表时间：
2017-10-18
影响因子：
3.9
通讯作者：
Ma Zhiqiang
中科院分区：
文献类型：
--
作者：
Schultz, Martin G.;Schroder, Sabine;Ma Zhiqiang
为支持第一份《对流层臭氧评估报告》，开发了一个全球地表臭氧观测关系数据库，并将每小时的测量数据和增强的元数据填入其中。通过一个共同的数据门户和一个网络界面提供了一套全面的臭氧数据产品，包括标准统计数据、健康和植被影响指标以及趋势信息。这些数据构成了TOAR分析的基础，重点关注人类健康、植被和气候相关的臭氧问题，这些问题是该功能的一部分。全球许多数据中心和研究人员之间的合作使其能够建立世界上最大的现场每小时地面臭氧数据集，涵盖1970年至2015年。通过将来自世界各地近10，000个测量点的数据与全球元数据信息相结合，对地表臭氧进行新的分析成为可能，例如第一次将测量点全球一致地定性为城市或农村/偏远地区。利用这些全球元数据可以对对流层臭氧的全球分布、季节性和长期变化有新的认识，并使TOAR能够对当前臭氧浓度和与健康、农业、为协调和综合来自各种网络和单项数据的数据格式和元数据信息作出了相当大的努力意见书。应用广泛的质量控制来识别可疑和错误的数据，包括明显的仪器偏移或校准的变化。这些数据被排除在TOAR数据产品之外。后验数据质量保证的局限性进行了讨论。由于在此介绍的工作，用于科学分析的地面臭氧数据的全球覆盖范围已大大扩大。然而，在地面观测网络中，无论是在没有监测的地区，还是在有监测方案但公众无法获得数据档案的地区，都存在着巨大的差距。因此，今后对数据库的改进不仅需要改进数据的统一，而且需要扩大数据共享，并在数据稀少的地区加强监测。
In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database of global surface ozone observations has been developed and populated with hourly measurement data and enhanced metadata. A comprehensive suite of ozone data products including standard statistics, health and vegetation impact metrics, and trend information, are made available through a common data portal and a web interface. These data form the basis of the TOAR analyses focusing on human health, vegetation, and climate relevant ozone issues, which are part of this special feature.Cooperation among many data centers and individual researchers worldwide made it possible to build the world's largest collection of in-situ hourly surface ozone data covering the period from 1970 to 2015. By combining the data from almost 10,000 measurement sites around the world with global metadata information, new analyses of surface ozone have become possible, such as the first globally consistent characterisations of measurement sites as either urban or rural/remote. Exploitation of these global metadata allows for new insights into the global distribution, and seasonal and long-term changes of tropospheric ozone and they enable TOAR to perform the first, globally consistent analysis of present-day ozone concentrations and recent ozone changes with relevance to health, agriculture, and climate.Considerable effort was made to harmonize and synthesize data formats and metadata information from various networks and individual data submissions. Extensive quality control was applied to identify questionable and erroneous data, including changes in apparent instrument offsets or calibrations. Such data were excluded from TOAR data products. Limitations of a posteriori data quality assurance are discussed. As a result of the work presented here, global coverage of surface ozone data for scientific analysis has been significantly extended. Yet, large gaps remain in the surface observation network both in terms of regions without monitoring, and in terms of regions that have monitoring programs but no public access to the data archive. Therefore future improvements to the database will require not only improved data harmonization, but also expanded data sharing and increased monitoring in data-sparse regions.