SCIENTIA GEOGRAPHICA SINICA ›› 2022, Vol. 42 ›› Issue (11): 1943-1953.doi: 10.13249/j.cnki.sgs.2022.11.009
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Wan Qing1(), Luo Xiang2, Pan Fangjie1, Jin Gui3(
)
Received:
2021-08-07
Revised:
2021-12-25
Online:
2022-11-30
Published:
2022-11-20
Contact:
Jin Gui
E-mail:wanqing1989@126.com;jingui@igsnrr.ac.cn
CLC Number:
Wan Qing, Luo Xiang, Pan Fangjie, Jin Gui. Spatial-temporal Evolution and Convergence Trend of Air Quality in China’s Urban Agglomerations[J].SCIENTIA GEOGRAPHICA SINICA, 2022, 42(11): 1943-1953.
Table 1
The annual average AQI in China’s urban agglomerations from 2015 to 2020
城市群 | 2015年 | 2016年 | 2017年 | 2018年 | 2019年 | 2020年 |
京津冀城市群 | 100 | 96 | 97 | 92 | 86 | 78 |
长三角城市群 | 85 | 78 | 80 | 75 | 74 | 66 |
珠三角城市群 | 60 | 61 | 67 | 64 | 65 | 53 |
长江中游城市群 | 79 | 76 | 77 | 72 | 75 | 63 |
成渝城市群 | 80 | 79 | 80 | 72 | 68 | 63 |
辽中南城市群 | 90 | 81 | 80 | 71 | 76 | 71 |
山东半岛城市群 | 106 | 98 | 97 | 92 | 96 | 85 |
海峡西岸城市群 | 48 | 46 | 58 | 59 | 55 | 52 |
哈长城市群 | 81 | 68 | 74 | 61 | 65 | 66 |
中原城市群 | 116 | 117 | 115 | 110 | 109 | 95 |
江淮城市群 | 79 | 80 | 87 | 82 | 82 | 69 |
关中城市群 | 82 | 87 | 88 | 82 | 79 | 72 |
北部湾城市群 | 60 | 55 | 57 | 55 | 53 | 49 |
天山北坡城市群 | 84 | 91 | 101 | 100 | 93 | 94 |
晋中城市群 | 89 | 97 | 111 | 101 | 99 | 90 |
呼包鄂榆城市群 | 79 | 74 | 77 | 82 | 74 | 72 |
滇中城市群 | 47 | 50 | 51 | 50 | 52 | 45 |
黔中城市群 | 52 | 53 | 52 | 50 | 44 | 43 |
兰西城市群 | 81 | 77 | 85 | 86 | 70 | 67 |
宁夏沿黄城市群 | 88 | 88 | 92 | 92 | 80 | 80 |
平均 | 79 | 78 | 81 | 77 | 75 | 69 |
Table 2
Days of primary pollutants in China’s urban agglomerations in 2015 and 2020
城市群名称 | 2015年 | 2020年 | |||||
PM2.5 | O3 | PM10 | PM2.5 | O3 | PM10 | ||
京津冀城市群 | 139 | 86 | 94 | 77 | 136 | 70 | |
长三角城市群 | 152 | 114 | 42 | 51 | 142 | 22 | |
珠三角城市群 | 81 | 86 | 23 | 21 | 113 | 17 | |
长江中游城市群 | 204 | 38 | 80 | 102 | 87 | 32 | |
成渝城市群 | 199 | 39 | 66 | 99 | 99 | 31 | |
辽中南城市群 | 149 | 106 | 62 | 104 | 105 | 72 | |
山东半岛城市群 | 171 | 91 | 94 | 93 | 150 | 82 | |
海峡西岸城市群 | 43 | 24 | 79 | 25 | 121 | 29 | |
哈长城市群 | 148 | 45 | 69 | 104 | 52 | 35 | |
中原城市群 | 223 | 33 | 87 | 124 | 143 | 72 | |
江淮城市群 | 235 | 0 | 82 | 89 | 144 | 31 | |
关中城市群 | 97 | 64 | 177 | 91 | 106 | 93 | |
北部湾城市群 | 106 | 33 | 57 | 50 | 40 | 53 | |
天山北坡城市群 | 85 | 20 | 213 | 95 | 127 | 94 | |
晋中城市群 | 159 | 35 | 115 | 96 | 153 | 83 | |
呼包鄂榆城市群 | 66 | 124 | 137 | 55 | 136 | 91 | |
滇中城市群 | 29 | 32 | 85 | 12 | 104 | 7 | |
黔中城市群 | 84 | 27 | 64 | 36 | 51 | 7 | |
兰西城市群 | 72 | 54 | 215 | 66 | 110 | 133 | |
宁夏沿黄城市群 | 82 | 62 | 191 | 68 | 119 | 142 |
Table 3
The Dagum Gini Coefficient and its composition of annual average AQI in China’s urban agglomerations
年份 | 总体 | 群内 | 贡献率/% | 群间 | 贡献率/% | 超变密度 | 贡献率/% | ||
2015 | 0.130 | 0.005 | 3.8 | 0.101 | 77.2 | 0.025 | 19.0 | ||
2016 | 0.128 | 0.004 | 3.2 | 0.105 | 81.9 | 0.019 | 14.8 | ||
2017 | 0.121 | 0.004 | 3.1 | 0.099 | 82.2 | 0.018 | 14.7 | ||
2018 | 0.123 | 0.004 | 3.3 | 0.103 | 83.7 | 0.016 | 13.0 | ||
2019 | 0.122 | 0.004 | 3.3 | 0.101 | 83.0 | 0.017 | 13.7 | ||
2020 | 0.118 | 0.004 | 3.1 | 0.099 | 84.2 | 0.015 | 12.7 |
Table 4
The coefficient variations of annual average AQI in China’s urban agglomerations
城市群 | 2015年 | 2016年 | 2017年 | 2018年 | 2019年 | 2020年 |
总体 | 0.235 | 0.229 | 0.216 | 0.218 | 0.216 | 0.209 |
京津冀城市群 | 0.207 | 0.186 | 0.184 | 0.144 | 0.163 | 0.141 |
长三角城市群 | 0.101 | 0.113 | 0.106 | 0.140 | 0.124 | 0.097 |
珠三角城市群 | 0.112 | 0.101 | 0.120 | 0.104 | 0.106 | 0.113 |
长江中游城市群 | 0.180 | 0.119 | 0.093 | 0.127 | 0.139 | 0.117 |
成渝城市群 | 0.119 | 0.097 | 0.104 | 0.087 | 0.084 | 0.093 |
辽中南城市群 | 0.098 | 0.087 | 0.109 | 0.108 | 0.086 | 0.093 |
山东半岛城市群 | 0.205 | 0.192 | 0.164 | 0.166 | 0.132 | 0.144 |
海峡西岸城市群 | 0.129 | 0.100 | 0.085 | 0.073 | 0.053 | 0.052 |
哈长城市群 | 0.169 | 0.124 | 0.132 | 0.101 | 0.104 | 0.114 |
中原城市群 | 0.079 | 0.055 | 0.054 | 0.030 | 0.039 | 0.046 |
江淮城市群 | 0.119 | 0.059 | 0.077 | 0.092 | 0.078 | 0.098 |
关中城市群 | 0.084 | 0.203 | 0.226 | 0.201 | 0.199 | 0.178 |
北部湾城市群 | 0.097 | 0.072 | 0.059 | 0.063 | 0.040 | 0.052 |
天山北坡城市群 | 0.219 | 0.216 | 0.183 | 0.184 | 0.171 | 0.172 |
晋中城市群 | 0.035 | 0.060 | 0.080 | 0.088 | 0.086 | 0.065 |
呼包鄂榆城市群 | 0.083 | 0.092 | 0.070 | 0.072 | 0.069 | 0.105 |
滇中城市群 | 0.147 | 0.134 | 0.084 | 0.059 | 0.058 | 0.068 |
黔中城市群 | 0.090 | 0.115 | 0.056 | 0.066 | 0.064 | 0.072 |
兰西城市群 | 0.055 | 0.115 | 0.079 | 0.081 | 0.084 | 0.074 |
宁夏沿黄城市群 | 0.058 | 0.043 | 0.042 | 0.022 | 0.041 | 0.048 |
Table 5
The result of β convergence test
绝对β收敛 | 条件β收敛 | ||||
传统收敛模型 | 空间杜宾模型 | 传统收敛模型 | 空间杜宾模型 | ||
注:括号中的值为估计系数的t统计量或z统计量,***表示估计系数在1%统计水平上显著,空白为无此项。 | |||||
β | −0.837*** (−29.70) | −0.802*** (−31.97) | −0.855*** (−30.31) | −0.825*** (−32.74) | |
ρ | 0.593*** (24.54) | 0.573*** (21.38) | |||
γ | 0.444*** (12.25) | 0.437*** (11.03) | |||
控制变量 | 否 | 否 | 是 | 是 | |
空间固定效应 | 是 | 是 | 是 | 是 | |
时间固定效应 | 是 | 是 | 是 | 是 | |
R2 | 0.63 | 0.20 | 0.67 | 0.50 | |
样本数 | 975 | 975 | 945 | 945 |
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