| 穆述鑫,刘语瑶,徐赞超,刘迎云.衡阳市PM2.5质量浓度时空分布特征及影响因素分析[J].南华大学学报(自然科学版),2023,(4):18~24, 40.[MU Shuxin,LIU Yuyao,XU Zanchao,LIU Yingyun.Spatial and Temporal Distribution Characteristics and Influencing Factors of PM2.5 Mass Concentration in Hengyang City[J].Journal of University of South China(Science and Technology),2023,(4):18~24, 40.] |
| 衡阳市PM2.5质量浓度时空分布特征及影响因素分析 |
| Spatial and Temporal Distribution Characteristics and Influencing Factors of PM2.5 Mass Concentration in Hengyang City |
| 投稿时间：2023-02-28 |
| DOI： |
| 中文关键词: PM2.5质量浓度 普通克里金插值 时空分布 相关性分析〖PS23-04穆述鑫OSID码.tif Y4*4,Y#〗 |
| 英文关键词:PM2.5 mass concentration ordinary Kriging interpolation spatiotemporal distribution correlation analysis |
| 基金项目:湖南省教育厅科学研究重点项目(17A180);湖南省自然科学基金项目(2020JJ5487) |
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| 中文摘要: |
| 基于PM2.5与其他五种大气污染物浓度数据以及气象资料,选用普通克里金插值与Spearman相关性分析方法,研究了衡阳市PM2.5质量浓度的时空分布特征及其影响因素。结果表明:1)PM2.5质量浓度年均值总体呈下降趋势,季均值具有冬高夏低的特征,月均值变化趋近于“U”型,PM2.5质量浓度小时变化在春冬两季均呈“W”型,夏季为“双峰双谷型”,秋季为“单峰单谷型”。2)PM2.5质量浓度季均值空间分布表现出季节性差异,高值区多集中于衡阳市主城区、衡阳县、衡东县北部、祁东县西北部等地。3)在春、秋、冬三季中,PM2.5与气温、日照时数呈正相关,与相对湿度、风速、降水量呈负相关,但在夏季仅有风速与PM2.5质量浓度具有负相关关系;PM10、SO2、NO2、CO等污染物与PM2.5在四个季节中均呈正相关,O3与PM2.5除在冬季无相关性外,在其他季节二者之间也具有正相关性。 |
| 英文摘要: |
| Based on the concentration data of PM2.5 and other five atmospheric pollutants and meteorological data, the spatial and temporal distribution characteristics and influencing factors of PM2.5 mass concentration in Hengyang City were studied by Kriging interpolation and Spearman correlation analysis. The results showed that:(1) the annual mean value of PM2.5 mass concentration showed a downward trend, the seasonal mean value was high in winter and low in summer, and the variation of monthly mean value tended to be “U” shaped.The hourly variation of PM2.5 mass concentration showed a “W” shaped pattern in spring and winter, with “double peak and double valley type” in summer and “single peak and single valley type” in autumn. (2) The seasonal mean spatial distribution of PM2.5 mass concentration showed seasonal differences.The high value area was mainly concentrated in Hengyang City, Hengyang County, the north of Hengdong County, the northwest of Qidong County and other places. (3) In spring, autumn and winter, PM2.5 was positively correlated with temperature and sunshine duration, and negatively correlated with relative humidity, wind speed and precipitation. However, only wind speed has a negative correlation with PM2.5 concentration in summer. PM10, SO2, NO2, CO and other pollutants are positively correlated with PM2.5 in the four seasons, and O3 and PM2.5 are positively correlated in other seasons except in winter. |
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