For understanding the changes of atmospheric pollutants during the dust weather in Lanzhou, The hourly monitoring data of the national atmospheric environment monitoring network system from 2016 to 2017 were selected to analyze the interannual variation trend of particulate matter. Combination with the ground meteorological parameters, using Hysplit model calculation, analysis the process of particulate matter sources and transmission, potential source area. The results show that the dust weather is mainly affected by three types of air masses, namely, The northwest, East by north short range transmission and Northern Inner Mongolia masses. Among them, the northwest air mass has a long duration, the highest extinction coefficient and significant deterioration of ambient air quality. The other two types of air masses affect the dust weather for a short duration, which facilitates the diffusion of pollution Before the occurrence of dust weather, PM10 is positively correlated with gaseous pollutants; during the process of dust weather, PM10 is negatively correlated; after sand dust weather, PM10 becomes positively correlated again. In spring, the potential distribution of particulate matter is relatively concentrated, mainly from the Hexi corridor in the northwest of Lanzhou, and the PSCF value is greater than 0.7. In the winter, the potential source areas are widely distributed, and the PSCF value is mainly concentrated in the range of 0.7-0.9. The large contribution area to PM10 is concentrated in the southeast of Xinjiang, and the contribution value is 240-320 μg·m-3.
Yang Yanping
,
Yang Lili
,
Wang Lina
,
Tao Huijie
,
Jiang Lin
. Air pollution characteristics and potential sources in Lanzhou during dust weather[J]. Journal of Desert Research, 2020
, 40(3)
: 60
-66
.
DOI: 10.7522/j.issn.1000-694X.2019.00045
[1] 邱玉珺,牛生杰,岳平,等.半干旱区春季沙尘气溶胶谱分布的观测研究[J].中国环境科学,2009,29(10):1021-1028.
[2] 奚晓霞,李杰,权建农.兰州市春季沙尘气溶胶质量浓度的若干研究[J].干旱区研究,2004,21(2):112-116.
[3] 雷洋,袁九毅,奚晓霞,等.兰州市春季沙尘气溶胶的监测与分析[J].干旱区资源与环境,2008,22(9):65-70.
[4] 奚晓霞,邓张胤.兰州市城关区冬季春季大气气溶胶与大气污染[J].兰州大学学报(自然科学版),1994(3):145-149.
[5] 赵敬国,王式功,张天宇,等.兰州市大气重污染气象成因分析[J].环境科学学报,2015,35(5):1547-1555.
[6] Kim H S,Chung Y S,Yoon M B.An analysis on the impact of large-scale transports of dust pollution on air quality in East Asia as observed in central Korea in 2014[J]. Air Quality,Atmosphere&Health,2016,9(1):83-93.
[7] Giannadaki D,Pozzer A,Lelieveld J.Modeled global effects of airborne desert dust on air quality and premature mortality[J].Atmospheric Chemistry and Physics,2014,14(2):957-968.
[8] 孟紫强,卢彬,周义,等.沙尘天气对呼吸系统疾病日入院人数影响的时间序列研究(1995~2003年)[J].环境科学学报,2006,26(11):1900-1908.
[9] 曹贤洁,张镭,李霞,等.张掖地区气溶胶吸收和散射特性分析[J].高原气象,2010,29(5):1246-1253.
[10] Duce R A,Unni C K,Ray B J,et al.Long-range atmospheric transport of soil dust from Asia to the Tropical North Pacific:temporal variability[J].Science,1980,209(4464):1522-1524.
[11] Tratt D M,Frouin R J,Westphal D L.April 1998 Asian dust event:a southern California perspective[J].Journal of Geophysical Research Atmospheres,2001,106(D16):18371-18379.
[12] 申彦波,沈志宝,汪万福.2001年春季中国北方大气气溶胶光学厚度与沙尘天气[J].高原气象,2003,22(2):185-190.
[13] 江灏,吴虹,尹宪志,等.河西走廊沙尘暴的时空变化特征与其环流背景[J].高原气象,2004,23(4):548-552.
[14] 刘娜,余晔,陈晋北,等.兰州春季沙尘过程PM10输送路径及其潜在源区[J].大气科学学报,2012,35(4):477-486.
[15] 陶健红,黄玉霞,陆登荣,等.河西走廊沙尘活动对兰州PM10浓度的影响及其评估[J].中国沙漠,2007,27(4):672-676.
[16] 刘筱冉,王金艳,邱继勇,等.沙尘天气对兰州市大气污染物置换和叠加作用[J].中国环境科学,2018,38(5):48-54.
[17] Jeong U,Kim J,Lee H,et al.Estimation of the contributions of long range transported aerosol in East Asia to carbonaceous aerosol and PM concentrations in Seoul,Korea using highly time resolved measurements:a PSCF model approach[J].Journal of Environmental Monitoring,2011,13(7):1905-1921.
[18] 唐顺仙,吕达仁,何建新,等.天气雷达技术研究进展及其在我国天气探测中的应用[J].遥感技术与应用,2017(1):1-13.
[19] 汤玉明,邓孺孺,刘永明,等.大气气溶胶遥感反演研究综述[J].遥感技术与应用,2018(1):25-34.
[20] Sugimoto N,Lee C H.Characteristics of dust aerosols inferred from lidar depolarization measurements at two wavelengths[J].Applied Optics,2006,45(28):7468-7474.
[21] 樊璠,陈义珍,陆建刚,等.北京春季强沙尘过程前后的激光雷达观测[J].环境科学研究,2013,26(11):1155-1161.
[22] Dorling S R,Davies T D,Pierce C E.Cluster analysis:A technique for estimating the synoptic meteorological controls on air and precipitation chemistry-Method and applications[J].Atmospheric Environment,1992,26(14):2575-2581.
[23] Polissar A V,Hopke P K,Paatero P,et al.The aerosol at Barrow,Alaska:long-term trends and source locations[J].Atmospheric Environment,1999,33(16):2441-2458.
[24] 杜朋,李德平,刘建国,等.APEC前后北京郊区大气颗粒物变化特征及其潜在源区分析[J].环境科学学报,2018,38(10):3846-3855.
