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Table 2 Pearson correlation coefficient between air pollutants and meteorological factors (2018–2021)

From: Spatiotemporal characterization of aerosols and trace gases over the Yangtze River Delta region, China: impact of trans-boundary pollution and meteorology

Pollutant

Temperature[°C]

Relative humidity [%]

Wind speed [m/s]

Shanghai

Spring

Summer

Winter

Autumn

Spring

Summer

Winter

Autumn

Spring

Summer

Winter

Autumn

 PM2.5

0.110

− 0.110

− 0.084

− 0.225

− 0.003

− 0.159

− 0.115

0.005

− 0.242

− 0.450

− 0.218

− 0.264

 PM10

0.171

0.299

− 0.191

− 0.146

− 0.403

− 0.511

− 0.415

− 0.260

− 0.125

− 0.220

− 0.174

− 0.258

 NO2

− 0.013

− 0.224

0.031

− 0.346

− 0.063

0.097

− 0.086

0.083

− 0.439

− 0.675

− 0.429

− 0.575

 SO2

0.251

0.116

− 0.327

− 0.032

− 0.307

− 0.548

− 0.458

− 0.313

− 0.107

− 0.042

− 0.145

− 0.211

 O3

0.551

0.162

0.226

0.365

− 0.550

− 0.525

− 0.173

− 0.425

− 0.005

− 0.283

0.069

− 0.164

Hefei

 PM2.5

− 0.138

0.071

0.02

− 0.211

0.059

− 0.330

0.13

− 0.047

− 0.068

− 0.311

− 0.25

− 0.224

 PM10

0.138

0.336

0.09

− 0.028

− 0.472

− 0.635

− 0.27

− 0.427

− 0.051

− 0.266

− 0.26

− 0.302

 NO2

0.037

− 0.070

0.02

− 0.260

− 0.382

− 0.245

− 0.23

− 0.333

− 0.298

− 0.524

− 0.38

− 0.547

 SO2

0.117

0.248

0.04

− 0.049

− 0.512

− 0.475

− 0.59

− 0.464

− 0.070

− 0.059

− 0.24

− 0.248

 O3

0.652

0.266

0.19

0.692

− 0.590

− 0.744

− 0.43

− 0.463

− 0.177

− 0.224

0.19

− 0.176

Nanjing

 PM2.5

0.05

− 0.006

0.002

− 0.23

0.02

− 0.20

0.05

0.01

− 0.19

− 0.20

− 0.25

− 0.12

 PM10

0.43

0.15

0.016

− 0.19

− 0.32

− 0.46

− 0.17

− 0.34

− 0.21

− 0.15

− 0.23

0.02

 NO2

0.19

− 0.03

0.071

− 0.28

− 0.33

− 0.11

− 0.13

− 0.31

− 0.36

− 0.45

− 0.40

− 0.33

 SO2

0.0016

0.25

− 0.08

0.12

− 0.40

− 0.60

− 0.41

− 0.45

− 0.32

− 0.05

− 0.22

− 0.20

 O3

0.26

0.26

0.17

0.67

− 0.61

− 0.70

− 0.43

− 0.42

− 0.08

− 0.09

0.17

− 0.05

Hangzhou

 PM2.5

0.056

0.003

− 0.015

− 0.022

− 0.110

− 0.154

− 0.093

− 0.097

− 0.165

− 0.349

− 0.246

− 0.39

 PM10

0.108

0.112

0.078

− 0.048

− 0.375

− 0.295

− 0.242

− 0.290

− 0.134

− 0.284

− 0.228

− 0.40

 NO2

− 0.013

− 0.382

0.076

− 0.269

− 0.091

0.252

− 0.021

− 0.106

− 0.340

− 0.587

− 0.264

− 0.57

 SO2

0.078

0.160

− 0.306

− 0.053

− 0.454

− 0.420

− 0.239

− 0.368

− 0.032

0.080

− 0.074

− 0.27

 O3

0.554

0.302

0.146

0.633

− 0.690

− 0.567

− 0.487

− 0.622

− 0.011

− 0.174

0.076

− 0.08