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Black carbon aerosol and its radiative impact at a high-altitude remote site on the southeastern Tibet Plateau
Zhao, ZZ (Zhao, Zhuzi)1; Wang, QY (Wang, Qiyuan)1; Xu, BQ (Xu, Baiqing)2; Shen, ZX (Shen, Zhenxing)3; Huang, RJ (Huang, Rujin)1; Zhu, CS (Zhu, Chongshu)1; Su, XL (Su, Xiaoli)1; Zhao, SY (Zhao, Shuyu)1; Long, X (Long, Xin)1; Liu, SX (Liu, Suixin)1; Cao, JJ (Cao, Junji)1,4; Cao, JJ
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2017
Volume122Issue:10Pages:5515-5530
DOI10.1002/2016JD026032
AbstractAerosol black carbon (BC) was measured with an Aethalometer (TM) at Lulang, a high-altitude station in southeastern Tibetan Plateau (TP), from July 2008 to August 2009. Daily mean BC loadings varied from 57.7 to 5368.9 ng m(-3) (grand average +/- standard deviation = 496.5 +/- 521.2 ng m(-3)), indicating a significant BC burden even at free tropospheric altitudes. BC loadings were highest during the premonsoon and lowest during the monsoon, and peaks in BC were coincident with high atmospheric boundary layers. Daily peaks in BC occurred from 08: 00 to 10: 00 local time with minor fluctuations at other times. The BC mass absorption efficiency (MAE) was calculated from elemental carbon concentrations obtained from a thermal/optical reflectance method and absorption coefficients from the Aethalometer T, and values ranged from 6.1 to 31.7 m(2) g(-1) (average = 16.6 +/- 5.7 m(2) g(-1)). Strong variations in the MAEs during the monsoon can be ascribed to large uncertainties due to low BC and babs and possibly coatings on the BC. High MAEs during premonsoon pollution events were likely due to internal mixing during transport. The mean direct surface radiative forcing (DRF) estimated from a radiation model was -19.9 (+/- 7.4) W m(-2) for the full aerosol population and -3.9 (+/- 1.8) W m(-2) for a BC only scenario. The BC DRF during a case study (-36.0 W m(-2)) was much stronger than the typical, and the BC contribution to the forcing was higher (-50%) than usual (-20%). These results show that BC can at times account for a relatively large fraction of the aerosol surface heating over the southeast TP, which may affect both climate and hydrological cycles.
Subject Area自然地理学
WOS IDWOS:000404131500028
Language英语
Indexed BySCI
KeywordNAM CO REGION OPTICAL-PROPERTIES LIGHT-ABSORPTION LONG-TERM ATMOSPHERIC AEROSOLS SOOT AEROSOLS CROSS-SECTION MIXING STATE SOUTH-ASIA M A.S.L.
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences
Cooperation Status国内
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8238
Collection图书馆
Corresponding AuthorCao, JJ
Affiliation1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian, Peoples R China.
2.Chinese Acad Sci, Inst Tibetan Plateau, Lab Tibetan Environm Changes & Land Surface Proc, Beijing, Peoples R China.
3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Peoples R China.
4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China.
Recommended Citation
GB/T 7714
Zhao, ZZ ,Wang, QY ,Xu, BQ ,et al. Black carbon aerosol and its radiative impact at a high-altitude remote site on the southeastern Tibet Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(10):5515-5530.
APA Zhao, ZZ .,Wang, QY .,Xu, BQ .,Shen, ZX .,Huang, RJ .,...&Cao, JJ.(2017).Black carbon aerosol and its radiative impact at a high-altitude remote site on the southeastern Tibet Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(10),5515-5530.
MLA Zhao, ZZ ,et al."Black carbon aerosol and its radiative impact at a high-altitude remote site on the southeastern Tibet Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.10(2017):5515-5530.
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