摘要
基于OMAERUV数据日产品,对甘肃省2008~2017年吸收性气溶胶指数(UVAI)的时空分布进行了分析,并对其相关因素进行了探讨,结果表明:该省近10a UVAI空间格局为由西北向东南区域逐步递减,UVAI的高值区域一直分布在酒泉市及邻近区域,为吸收性气溶胶污染源中心;甘肃省UVAI的稳定性呈现从东北向西南区域逐渐降低的规律;UVAI月均值呈现出明显的规律性,每年的月变化均呈现“V”型;四季UVAI水平为:冬季>春季>秋季>夏季,四季变化规律基本同步,十年来四季的UVAI呈逐渐上升趋势,且四季中主导的吸收性气溶胶来源不同.基于PM2.5的UVAI指示的空气质量等级分析,甘肃省空气质量以良为主;从气象因素与UVAI相关性分析来看,降水量、气温均与UVAI之间呈现显著正相关,风向也对其空间分布有重要影响;植被覆盖度与UVAI呈现正相关的区域主要分布在甘肃省西北部、武威市中部区域,呈现负相关的甘肃南部天水、陇南等区域为较高的植被覆盖区域.从人类活动因子与UVAI相关性来看,地区生产总值、各产业产值与UVAI有着明显的正相关性,尤其以第二产业与UVAI相关性最高;UVAI与汽车保有量、能源消耗总量及人口密度均存在较强的正相关,说明汽车尾气和工业排放及建筑粉尘也是吸收性气溶胶的重要来源.针对甘肃省UVAI时空分布特点、自然及人类活动因素分析情况,提出了减少人类活动强度等建议.
Based on the OMAERUV data daily product,the spatial and temporal distribution of the ultraviolet aerosol index(UVAI)in Gansu Province from 2008 to 2017 was analyzed,and the related factors were discussed.The results showed that the spatial pattern of UVAI nearly 10 years in the province gradually decreased from northwest to southeast region.The high value area of UVAI distributed in Jiuquan City and its neighboring areas,which was the center of absorbent aerosol pollution.The stability of UVAI in Gansu Province gradually decreased from northeast to southwest region.The monthly average value of UVAI showed an obvious regularity,and the monthly change of UVAI showed a"V"pattern every year;the UVAI level of four seasons was:winter>spring>autumn>summer,the seasons were basically synchronized,the UVAI of the four seasons had risen gradually during past ten years,and the sources of the absorbed aerosol dominated in four seasons were different.The analysis of air quality level Based on UVAI of PM2.5 indicated that the air quality in Gansu Province was mainly good;From the analysis of correlation between meteorological factors and UVAI,precipitation,temperature showed a significant positive correlation to UVAI,and the wind direction also had an important impact on its spatial distribution;the areas where the main distribution of vegetation coverage and UVAI was positively correlated distributed in the northwestern of Gansu Province and the center of Wuwei City,the areas where the main distribution of vegetation coverage and UVAI was negatively correlated distributed in Tianshui and Longnan in the south of Gansu Province,which had a higher vegetation coverage.From the point of the correlation between human activity factors and UVAI,regional GDP,industrial output value and UVAI had a significant positive correlation,especially the secondary industry and UVAI had the highest relevance;UVAI had a strong positive correlation with car ownership,total energy consumption and population density,which indicated that automobile exhaust,industrial emissions and construction dust were important source of absorbing aerosol.Based on the spatial and temporal distribution characteristics of UVAI and the analysis of natural and human activities in Gansu Province,some suggestions of reducing the intensity of human activities were proposed.
作者
李逢帅
巨天珍
马超
咸龙
LI Feng-shuai;JU Tian-zhen;MA Chao;XIAN Long(Geographical and Environmental Department,Northwest Normal University,Lanzhou 730070,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2019年第10期4082-4092,共11页
China Environmental Science
基金
甘肃省重点研发计划(17YF1FA120)
兰州市科技计划项目(2017-RC-69)
