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Table 2 Spearman correlation coefficients between air pollutants and meteorological parameters in Jinan, China, 2012–2016

From: The impact of outdoor air pollutants on outpatient visits for respiratory diseases during 2012–2016 in Jinan, China

  PM2.5 PM10 SO2 NO2 CO O3 Temperature Humidity Pressure Wind speed
PM2.5 1 0.863** 0.606** 0.642** 0.781** −0.182** −0.269** 0.131** 0.238** −0.236**
PM10   1 0.613** 0.683** 0.670** −0.125** −0.235** −0.116** 0.223** −0.127**
SO2    1 0.702** 0.674** − 0.344** − 0.588** − 0.293** 0.532** − 0.036
NO2     1 0.782** −0.459** −0.524** − 0.069** 0.557** − 0.391**
CO      1 −0.435** −0.455** 0.172** 0.414** −0.385**
O3       1 0.794** −0.099** − 0.679** 0.199**
Temperature        1 0.179** −0.885** 0.067**
Humidity         1 −0.239** −0.354**
Pressure          1 −0.119**
Wind speed           1
  1. **P < 0.01