Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031246 |
Enhanced Light-Absorption of Black Carbon in Rainwater Compared With Aerosols Over the Northern Indian Ocean | |
Budhavant, Krishnakant1,2,3,4,5; Andersson, August1,2; Holmstrand, Henry1,2; Bikkina, Poonam1,2,6; Bikkina, Srinivas1,2; Satheesh, S. K.4,5; Gustafsson, Orjan1,2 | |
2020-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Maldives; India |
英文摘要 | Black carbon (BC) aerosols affect climate, especially in high aerosol loading regions such as South Asia. A key uncertainty for the climate effects of BC is the evolution of light-absorbing properties in the atmosphere. Here, we present a year-round comparison of the mass absorption cross section (MAC; 678 nm) of BC in air (PM10) and rain, for samples collected at the Maldives Climate Observatory at Hanimaadhoo. We develop a filter-loading correction scheme for estimating BC absorption on filters used in high-volume samplers. The year-round average MAC(678) of BC in the rain is almost twice (13.3 +/- 4.2 m(2)/g) compared to the PM10 aerosol (7.2 +/- 2.6 m(2)/g). A possible explanation is the elevated ratio of organic carbon (OC) to BC observed in rain particulate matter (9.4 +/- 6.3) compared to in the aerosols (OC/BC 2.6 +/- 1.4 and water-insoluble organic carbon/BC 1.2 +/- 0.8), indicating a coating-enhancement effect. In addition to BC, we also investigated the MAC(365) of water-soluble brown carbon in PM10 (0.4 +/- 0.4 m(2)/g, at 365 nm). In contrast to BC, MAC(365)brown carbon relates to air mass history, showing higher values for samples from air originating over the South Asian landmass. Furthermore, calculated washout ratios are much lower for BC compared to OC and inorganic ions such as sulfate, implying a longer atmospheric lifetime for BC. The wet deposition flux for BC during the high loading winter was 3 times higher than during the wet summer, despite much less precipitation in the winter. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521080000004 |
WOS关键词 | SOLUBLE ORGANIC-CARBON ; ATMOSPHERIC LIFETIME ; PARTICULATE CARBON ; BROWN CARBON ; SOUTH-ASIA ; URBAN AREA ; BIOMASS ; WATER ; PARTICLES ; DEPOSITION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280016 |
专题 | 气候变化 |
作者单位 | 1.Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Stockholm, Sweden; 2.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 3.Mald Climate Observ Hanimaadhoo, Hanimaadhoo, Maldives; 4.Indian Inst Sci IISc, Ctr Atmospher & Ocean Sci, Bangalore, Karnataka, India; 5.Indian Inst Sci IISc, Divecha Ctr Climate Change, Bangalore, Karnataka, India; 6.CSIR, Natl Inst Oceanog, Visakhapatnam, Andhra Pradesh, India |
推荐引用方式 GB/T 7714 | Budhavant, Krishnakant,Andersson, August,Holmstrand, Henry,et al. Enhanced Light-Absorption of Black Carbon in Rainwater Compared With Aerosols Over the Northern Indian Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(2). |
APA | Budhavant, Krishnakant.,Andersson, August.,Holmstrand, Henry.,Bikkina, Poonam.,Bikkina, Srinivas.,...&Gustafsson, Orjan.(2020).Enhanced Light-Absorption of Black Carbon in Rainwater Compared With Aerosols Over the Northern Indian Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(2). |
MLA | Budhavant, Krishnakant,et al."Enhanced Light-Absorption of Black Carbon in Rainwater Compared With Aerosols Over the Northern Indian Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.2(2020). |
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