Recent increase in black carbon concentrations from a Mt. Everest ice core spanning 1860-2000 AD
Recent increase in black carbon concentrations from a Mt. Everest ice core spanning 1860-2000 AD
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DOI：
10.1029/2010gl046096
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发表时间：
2011-02-18
影响因子：
5.2
通讯作者：
Mayewski, P. A.
中科院分区：
文献类型：
--
作者：
Kaspari, S. D.;Schwikowski, M.;Mayewski, P. A.
A Mt.珠峰冰芯跨越1860-2000 AD和黑碳（BC）的高分辨率分析使用单粒子烟尘光度计（SP2）表现出强烈的季节性，在冬季和春季的峰值浓度，和低浓度在夏季季风季节。与1860-1975年相比，1975-2000年的BC浓度增加了大约三倍，这表明来自人为来源的BC正在被输送到喜马拉雅山的高海拔地区。BC增加的时间与南亚和中东的BC排放清单数据一致，但自1990年以来，冰芯BC记录并未显示BC浓度持续增加。珠峰的公元前和尘埃记录提供了有关吸收杂质的信息，这些杂质可以通过减少冰雪的吸收来促进冰川融化。自1860年以来，沙尘浓度没有增加的趋势，雪中BC引起的地表辐射强迫估计超过了雪中沙尘的辐射强迫。这表明，减少BC排放量可能是减少吸收杂质对雪融化和融化的影响的有效手段，这影响了喜马拉雅冰川和亚洲主要河流的水资源可用性。引文：Kaspari，S. D.生M. Schwikowski，M. Gysel，M. G. Flanner，S.康，S. Hou和P.A. Mayewski（2011），最近从一个山的黑碳浓度增加。珠峰冰芯跨越公元1860-2000年，地球物理学。保留信函：38，L04703，doi：10.1029/2010GL046096。
A Mt. Everest ice core spanning 1860-2000 AD and analyzed at high resolution for black carbon (BC) using a Single Particle Soot Photometer (SP2) demonstrates strong seasonality, with peak concentrations during the winter-spring, and low concentrations during the summer monsoon season. BC concentrations from 1975-2000 relative to 1860-1975 have increased approximately threefold, indicating that BC from anthropogenic sources is being transported to high elevation regions of the Himalaya. The timing of the increase in BC is consistent with BC emission inventory data from South Asia and the Middle East, however since 1990 the ice core BC record does not indicate continually increasing BC concentrations. The Everest BC and dust records provide information about absorbing impurities that can contribute to glacier melt by reducing the albedo of snow and ice. There is no increasing trend in dust concentrations since 1860, and estimated surface radiative forcing due to BC in snow exceeds that of dust in snow. This suggests that a reduction in BC emissions may be an effective means to reduce the effect of absorbing impurities on snow albedo and melt, which affects Himalayan glaciers and the availability of water resources in major Asian rivers. Citation: Kaspari, S. D., M. Schwikowski, M. Gysel, M. G. Flanner, S. Kang, S. Hou, and P. A. Mayewski (2011), Recent increase in black carbon concentrations from a Mt. Everest ice core spanning 1860-2000 AD, Geophys. Res. Lett., 38, L04703, doi: 10.1029/2010GL046096.