江苏省PM_(2.5)时空变化及土地利用影响研究  

Spatial and Temporal Variation of PM_(2.5) and Influences of Landuse Pattern on PM_(2.5) Concentrations in Jiangsu Province

作　　者：李玉玲[1] 刘红玉[1] 娄彩荣[1,2] 孙一鸣[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210046 [2]南通大学地理科学学院,江苏南通226007

出　　处：《环境科学与技术》2016年第8期10-15,21,共7页Environmental Science & Technology

基　　金：国家自然科学基金项目(41071119);江苏高校优势学科建设工程资助项目(PAPD);江苏省地理信息资源开发与利用协同创新中心

摘　　要：基于江苏省2013年12月-2014年11月期间71个监测点PM_(2.5)日数据以及2014年土地利用数据,以年、季为时间尺度,利用泰森多边形划分研究区域,在系统分析PM_(2.5)时空分异规律基础上,揭示PM_(2.5)浓度变化及其与土地利用的关系。结果表明:(1)PM_(2.5)浓度分布存在明显的时空变化趋势。时间上,冬季浓度最高,达109.72μg/m^3,春季次之,为70.13μg/m^3,秋季最低,仅53.20μg/m^3;空间上,从各监测点一年PM_(2.5)浓度看,南京、泰州和宿迁数个监测点是PM_(2.5)高浓度区域,浓度范围81~85μg/m^3。盐城开发区管委会浓度最低,仅49.75μg/m^3,全省呈现"内陆高,沿海低;内陆南高北低"的趋势。(2)土地利用类型及景观格局对PM_(2.5)浓度分布有一定影响。耕地、草地、水域和未利用地与PM_(2.5)呈负相关,林地和建设用地则呈正相关。景观面积、密度、破碎度和聚散性是影响PM_(2.5)的主要因素,冬夏季较为敏感。Based on PM_（2.5）concentration data of 71 monitoring stations over Jiangsu Province during the period Dec.2013 to Nov.2014 as well as the land-use information of 2014,the relation of PM_（2.5）concentration to the variation of land-use pattern was studied with the time-scale of year and season,and the zoning of the study area by use of Thiessen polygon method;and the spatial and temporal differentiation of PM_（2.5）was systematically analyzed.The results of the study showed that distribution of PM_（2.5）concentration obviously tended changing in terms of time and space,i.e.,in time scale,the concentration of PM_（2.5）was the highest with 109.72 μg/m^3 in winter,followed by spring,70.13 μg/m^3,and the lowest in autumn,only 53.20 μg/m^3;while in space scale,according to the data of annual average PM_（2.5）concentrations in each monitoring point,several sites such as the cities of Nanjing,Taizhou and Suqian had high PM_（2.5）concentrations,ranging between 81 to 85 μg/m^3,while PM_（2.5）concentrations in the Yancheng Development Zone was the lowest：only 49.75 μg/m^3;generally showing PM_（2.5）concentration pattern in the province was ＂higher towards inland,but lower towards coast＂and＂higher in the south,but lower in the north＂.On the other hand,land-use and landscape patterns somewhat affected PM_（2.5）concentration,i.e.,arable land,grassland,water and barren land were negatively correlated with PM_（2.5）,while woodland and construction land were positively correlated with PM_（2.5）;in general,the landscape in terms of area,density,fragmentation and accumulation degree was the main factors affecting the PM_（2.5）.

关 键 词：PM_(2.5) 时空分异 景观格局 泰森多边形 

分 类 号：X144[环境科学与工程—环境科学]