2020年天津市不同功能区空气负氧离子浓度时空分布及其与气象条件的关系

doi:10.3969/j.issn.1673-503X.2024.02.008

Abstract

Abstract:

Utilizing hourly air negative oxygen ion and meteorological observation data from Tianjin city in 2020, the variations in air negative oxygen ion concentrations (ANOIC) across different seasons and weather conditions within three typical functional areas, i. e. forests, wetlands, and urban zones and their relationships with meteorological elements were investigated. The results indicate that the ANOIC is highest in forests, followed by wetlands, and lowest in urban areas, with the ranking for seasons being summer > spring > autumn > winter. The ANOIC is highest on rainy days and lowest on snowy days. The ANOIC in forests on clear days is slightly higher than on foggy days, whereas those in wetlands and urban areas are slightly lower on clear days compared to foggy days. The diurnal variation of ANOIC is bimodal, with the amplitude of variation following the sequences of forests>wetlands>urban areas, and summer > spring > autumn > winter. Overall, ANOIC shows a positive correlation with temperature, relative humidity, vapor pressure, and the amount of precipitation in the past 24 hours, but a negative correlation with atmospheric pressure. The relationship between ANOIC and visibility differs across the different functional areas, while the correlation with wind speed is not significant. The relationship between ANOIC and meteorological elements varies across different seasons and weather conditions. In urban areas, the ANOIC is significantly influenced by human activities, making its variability more complex compared to forests and wetlands, and its correlation with meteorological elements is weaker on the whole.

Key words: Air negative oxygen ions, Meteorological elements, Ecological functional areas

CLC Number:

Xueyan MA,Meiling SUN,Ling GUO,Xiaojia WANG. Spatio-temporal distribution of negative oxygen ion concentration in different functional areas of Tianjin city in 2022 and their relationships with meteorological conditions[J]. Journal of Meteorology and Environment, 2024, 40(2): 59-68.

Figures/Tables 10

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Table 1

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References 32

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气象要素	森林	湿地	城区
相对湿度/(%)	0.155^**	0.225^**	0.168^**
气压/hPa	-0.165^**	-0.238^**	-0.291^**
气温/℃	0.148^**	0.247^**	0.302^**
水汽压/hPa	0.138^**	0.347^**	0.296^**
降水量/mm	0.080^**	0.106^**	0.031^**
风速/(m·s^-1)	0.014	-0.015	0.008
能见度/km	0.030^**	-0.062^**	0.011

气象要素	春季			夏季			秋季			冬季
气象要素	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区
相对湿度/(%)	0.327^**	0.237^**	-0.059^**	0.232^**	0.374^**	0.263^**	-0.154^**	0.032	-0.337^**	-0.612^**	-0.029	0.016
气压/hPa	-0.241^**	-0.150^**	-0.004	0.166^**	-0.062^**	-0.102^**	-0.015	0.163^**	-0.106^**	0.270^**	0.031	0.010
气温/℃	0.172^**	0.149^**	0.061^**	0.030	0.160^**	-0.014	-0.014	-0.210^**	0.125^**	-0.206^**	-0.050^*	0.091^**
水汽压/hPa	0.225^**	0.284^**	-0.016	0.059^**	0.391^**	-0.048^*	0.003	-0.169^**	-0.052^*	-0.521^**	-0.049^*	0.058^**
降水量/mm	0.131^**	0.104^**	-0.012	0.081^**	0.066^**	-0.040	0.012	-0.041	-0.051^*	-0.081^**	0.010	0.089^**
风速/(m·s^-1)	-0.030	-0.033	0.039	-0.026	-0.086^**	-0.018	0.020	0.030	-0.060^**	0.087^**	-0.011	0.054^*
能见度/km	0.027	-0.133^**	0.066^**	-0.004	-0.083^**	-0.071^**	0.093^**	0.092^**	0.291^**	0.442^**	0.016	0.091^**

相对湿度/(%)	春季			夏季			秋季			冬季
相对湿度/(%)	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区
(0, 30]	0.027	-0.174^**	-0.104^**	-0.308	0.656	-0.019	-0.173^**	-0.196	-0.031	0.061	0.045	-0.015
(30, 60]	-0.124^**	0.214^**	0.087^**	0.158^**	0.161^**	0.323^**	-0.361^**	0.029	-0.230^**	-0.392^**	0.004	0.024
(60, 80]	0.392^**	0.218^**	-0.147^**	0.063	0.156^**	0.071^*	-0.152^**	0.009	0.015	-0.395^**	-0.162^**	-0.245^**
(80, 100]	-0.158^*	-0.459^**	-0.103	0.160^**	0.085^*	0.035	-0.125^*	0.087^**	0.325^**	0.135	0.136^**	0.116

降水量级	春季			夏季			秋季			冬季
降水量级	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区
小雨	-0.024	0.192^**	-0.107	-0.106^*	-0.174	0.008	-0.144^*	-0.172^*	-0.390^**	0.136	0.134	0.174
中雨	0.407^**	0.260^*	-0.173	0.099	0.387^**	-0.307^**	-0.025	0.159	0.232	0.422	0.598^**	0.259
大雨	—	0.496^**	0.640	0.218^*	0.415^**	-0.423^**	0.528^**	0.054	0.016	—	—	—
暴雨	—	—	—	0.504^**	0.221	0.132	—	—	0.591^**	—	—	—

气象要素	晴天			雾天			雨天			雪天
气象要素	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区	森林	湿地	城区
相对湿度/(%)	0.160^**	0.238^**	0.173^**	0.223^**	0.203^**	0.187^**	0.173^**	0.185^**	-0.588	-0.511^**	0.270^**	-0.158
气压/hPa	-0.140^**	-0.181^**	-0.266^**	-0.246^**	-0.332^**	-0.370^**	-0.098^*	-0.180^**	0.563	-0.347^**	-0.304^**	0.872^**
气温/℃	0.110^**	0.195^**	0.280^**	0.213^**	0.350^**	0.367^**	0.136^**	0.194^**	0.687	0.592^**	0.337^**	-0.037
水汽压/hPa	0.115^**	0.283^**	0.267^**	0.236^**	0.440^**	0.367^**	0.013	0.276^**	-0.309	0.570^**	0.432^**	-0.179
降水量/mm	0.119^**	0.116^**	0.021	0.123^**	0.063^**	0.048^*	-0.053	0.050	0.013	-0.116	0.046	0.126
风速/(m·s^-1)	-0.013	-0.036^*	0.007	0.069^**	0.026	0.024	-0.066	0.076	-0.444	-0.367^**	-0.038	-0.567
能见度/km	0.008	-0.051^**	0.014	0.013	-0.017	0.086^**	0.334^**	-0.063	0.447	-0.077	0.070	0.646^*

Spatio-temporal distribution of negative oxygen ion concentration in different functional areas of Tianjin city in 2022 and their relationships with meteorological conditions

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