Open AccessDeposition of anthropogenic aerosols in a southeastern Tibetan glacier
Author(s) -
Xu BaiQing,
Wang Mo,
Joswiak Daniel R.,
Cao JunJi,
Yao TanDong,
Wu GuangJian,
Yang Wei,
Zhao HuaBiao
Publication year - 2009
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2008jd011510
Subject(s) - glacier , snow , environmental science , plateau (mathematics) , radiative forcing , deposition (geology) , precipitation , firn , atmospheric sciences , snowmelt , mineral dust , monsoon , total organic carbon , climatology , aerosol , environmental chemistry , physical geography , geology , climate change , chemistry , meteorology , oceanography , geomorphology , geography , mathematical analysis , mathematics , sediment
Measurements of elemental carbon (EC), water‐insoluble organic carbon (WIOC), and inorganic ions from a very high resolution snow/firn core retrieved from a glacier on the southeastern Tibetan Plateau reveal increasing concentrations associated with deposition of anthropogenic aerosols during the period 1998–2005. EC, WIOC, and SO 4 2− concentrations in the core were 4.7, 56.0, and 4.2 ng g −1 in 1998, but increased to 16.8, 144.4, and 162.1 ng g −1 in 2005, respectively. Comparison of EC to SO 4 2− and K + concentrations indicates a relatively greater impact of fossil fuel burning on EC deposition compared to biomass burning. Significant contribution of secondary OC production is apparent from the low EC/WIOC ratios. EC concentrations show large seasonal variability, with nonmonsoon precipitation containing more than double the concentrations found in monsoon snowfall. Since snow cover on the Tibetan Plateau extends to its maximum aerial extent during the nonmonsoon season, the high EC concentrations in snowfall during this time can cause advanced snowmelt and enhanced radiative forcing.