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. 2019 Nov 18;9:16998. doi: 10.1038/s41598-019-53103-7

Figure 2.

Figure 2

The distribution of correlation coefficients between monthly mean MAD8 O3 in Shanghai and the 500 hPa geo-potential height over Eastern Asia during late-summer from 2013 to 2017 (Black box represents the key region of WPSH. Values of red and orange shades have passed positive 95% and 99% confidence levels based on student-t test, respectively). NCEP Reanalysis data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at https://www.esrl.noaa.gov/psd/. The map was generated by NCL software [The NCAR Command Language (Version 6.3.0) [Software]. (2015). Boulder, Colorado: UCAR/NCAR/CISL/TDD. 10.5065/D6WD3XH5].