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Yan F, Li C, Kang S, Hu Z, Zhang C, Yang C, Chen P, Yang J, Xu Y, Li Y, Gao S, He C. Dust dominates glacier darkening across majority of the Tibetan Plateau based on new measurements. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 891:164661. [PMID: 37277041 DOI: 10.1016/j.scitotenv.2023.164661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/15/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
Rapid retreat and darkening of most glaciers in the Tibetan Plateau (TP) are enhanced by the deposition of light-absorbing particles (LAPs). Here, we provided new knowledge on the estimation of albedo reduction caused by black carbon (BC), water-insoluble organic carbon (WIOC), and mineral dust (MD), based on a comprehensive study of snowpit samples from ten glaciers across the TP collected in the spring of 2020. According to the albedo reductions caused by the three LAPs, the TP was divided into three sub-regions: the eastern and northern margins, Himalayas and southeastern TP, and western to inner TP. Our findings indicated that MD had a dominant role in causing snow albedo reductions across the western to inner TP, with comparable effects to WIOC but stronger effects than BC in the Himalayas and southeastern TP. BC played a more important role in the eastern and northern margins of the TP. In conclusion, the findings of this study emphasize not only the important role of MD in glacier darkening across majority of the TP but also the influence of the WIOC in enhancing glacier melting which indicates the dominant contribution of non-BC components in the LAP-related glacier melting of the TP.
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Affiliation(s)
- Fangping Yan
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chaoliu Li
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Shichang Kang
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaofu Hu
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chao Zhang
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chengde Yang
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pengfei Chen
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Junhua Yang
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yinbo Xu
- School of Geographical Sciences, Southwest University, Chongqing 400045, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yang Li
- Institute of International Rivers and Eco-security, Yunnan University, Kunming, Yunnan 650500, China
| | - Shaopeng Gao
- State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Cenlin He
- Research Applications Laboratory, National Center for Atmospheric Research, Boulder, CO 80301, USA
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Das S, Miller BV, Prospero JM, Gaston CJ, Royer HM, Blades E, Sealy P, Chellam S. Coupling Sr-Nd-Hf Isotope Ratios and Elemental Analysis to Accurately Quantify North African Dust Contributions to PM 2.5 in a Complex Urban Atmosphere by Reducing Mineral Dust Collinearity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:7729-7740. [PMID: 35670821 PMCID: PMC10069281 DOI: 10.1021/acs.est.2c01233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Tracking Saharan-Sahelian dust across the globe is essential to elucidate its effects on Earth's climate, radiation budget, hydrologic cycle, nutrient cycling, and also human health when it seasonally enters populated/industrialized regions of Africa, Europe, and North America. However, the elemental composition of mineral dust arising locally from construction activities and aeolian soil resuspension overlaps with African dust. Therefore, we derived a novel "isotope-resolved chemical mass balance" (IRCMB) method by employing radiogenic strontium, neodymium, and hafnium isotopes to accurately differentiate and quantitatively apportion collinear proximal and synoptic-scale crustal and anthropogenic mineral dust sources. IRCMB was applied to two air masses that transported African dust to Barbados and Texas to track particulate matter (PM) spikes at both locations. During Saharan-Sahelian intrusions, the radiogenic content of urban PM2.5 increased with respect to 87Sr/86Sr and 176Hf/177Hf but decreased in terms of 143Nd/144Nd, demonstrating the ability of these isotopes to sensitively track African dust intrusions even in complex metropolitan atmospheres. The principal aerosol strontium, neodymium, and hafnium end members were concrete dust and soil, soil and motor vehicles, and motor vehicles and North African dust, respectively. IRCMB separated and quantified local soil and distal crustal dust even when PM2.5 concentrations were low, opening a promising source apportionment avenue for urbanized/industrialized atmospheres.
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Affiliation(s)
- Sourav Das
- Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Brent V Miller
- Department of Geology and Geophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Joseph M Prospero
- Department of Atmospheric Sciences, University of Miami, Miami, Florida 33149, United States
| | - Cassandra J Gaston
- Department of Atmospheric Sciences, University of Miami, Miami, Florida 33149, United States
| | - Haley M Royer
- Department of Atmospheric Sciences, University of Miami, Miami, Florida 33149, United States
| | - Edmund Blades
- Department of Atmospheric Sciences, University of Miami, Miami, Florida 33149, United States
| | - Peter Sealy
- Department of Atmospheric Sciences, University of Miami, Miami, Florida 33149, United States
| | - Shankararaman Chellam
- Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
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Jiao X, Dong Z, Brahney J, Parteli EJ, Li F, Marcelli A, Wei T. Uranium isotopes of aeolian dust deposited in northern Tibetan Plateau glaciers: Implications for tracing aeolian dust provenance. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.01.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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