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. 2017 May 31;1(3):106–121. doi: 10.1002/2017GH000049

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©2017. The Authors.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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R ² value for each in situ measurement site as compared to (a) WRF‐Chem, (b) kriged PM_2.5 measurements, (c) MODIS AOD, (e) Global Ridge Regression, and (f) geo‐weighted ridge regression for 1 June 2012–2031 and October 2012. (d) The mean bias for the WRF‐Chem simulated PM_2.5 at each in situ measurement site (note the different color scale).