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. 2018 Jan 17;8:934. doi: 10.1038/s41598-018-19481-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Triple nesting domains for computational implementation of the CMAQ model: d01 covers most of China and part of East Asia with the resolution of 36 × 36 km; d02 covers the Northern China Plain (NCP) with the resolution of 12 × 12 km; d03 covers the Beijing-Tianjin-Hebei (BTH) region with the resolution of 4× 4 km. Green, orange, and blue colors represent Heibei, Beijing, and Tianjin, respectively. The maps were created by NCAR Command Language (NCL) (http://www.ncl.ucar.edu/).