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Sources, characteristics and climate impact of light-absorbing aerosols over the Tibetan Plateau
Earth-Science Reviews ( IF 10.8 ) Pub Date : 2022-07-08 , DOI: 10.1016/j.earscirev.2022.104111
Siyu Chen , Renhe Zhang , Rui Mao , Yulan Zhang , Yu Chen , Zhenming Ji , Yongqi Gong , Yawen Guan

Known as the "third pole" and "water tower of Asia", the Tibetan Plateau (TP) is the home to the largest number of glaciers in the mid-latitudes and one of the most sensitive areas to global climate change due to its special geographical location and powerful thermodynamic effects. In recent years, the TP has been affected by exogenous pollutants and the concentrations of some pollutants have shown an increasing trend, especially light-absorbing aerosols (LAAs), when ice core records, ground- and aircraft-based field campaigns and satellite technology enabled synthesized monitoring. The enhanced warming of the vast majority of regions in TP, together with Arctic warming, and snow/ice decline, represents credible evidence of anthropogenic climate change. This paper provides a comprehensive review of studies on the sources, characteristics and climate impacts of LAAs over the TP. Adjacent to the two major emission sources of LAAs in East Asia and South Asia, the unique geographical location and climatic characteristics of the TP make it possible for TP LAAs to cause atmospheric warming and accelerated glacier melting, affecting the hydrological cycle in South Asia, East Asia and even the Northern Hemisphere, thus causing a series of serious environmental and social problems. LAAs, such as black carbon and dust, can strongly absorb solar radiation and and have significantly influence on climate change. Moreover, light-absorbing impurities (LAIs) on snow/ice can reduce the snow/ice albedo and further accelerate the snow/ice melting. Both LAAs and LAIs over the TP can induce thermodynamic feedback processes, cause significant warming of the TP and then lead to a strengthening of the early monsoon and affect the subsequent evolution of the monsoon. Many mechanisms have been proposed forth regarding how TP LAAs modulate the phase, intensity, and amplitude of the Asian climate system. A wide range of theoretical, observational, and modeling findings on TP LAAs and their climate impacts are synthesized, in which dust aerosols from drylands and black carbon from biomass burning are considered leading components. By coupling an integrated approach with state-of-the-art modeling, high temporal and fine spatial resolution remote sensing observations with increasing sampling over the TP will provide further insights into TP aerosols.



中文翻译:

青藏高原吸光气溶胶的来源、特征及气候影响

青藏高原被誉为“亚洲第三极”和“水塔”,是中纬度地区冰川数量最多的地区,也是全球气候变化最敏感的地区之一。地理位置和强大的热力学效应。近年来,青藏高原受到外源污染物的影响,在冰芯记录、地基和机载野外活动以及卫星技术的支持下,一些污染物的浓度呈上升趋势,尤其是吸光气溶胶(LAA)综合监测。青藏高原绝大多数地区变暖加剧,加上北极变暖和冰雪减少,是人为气候变化的可靠证据。本文全面回顾了有关来源的研究,青藏高原上LAAs的特征和气候影响。青藏高原毗邻东亚和南亚两大LAA排放源,独特的地理位置和气候特征使得TP LAAs有可能引起大气变暖和冰川加速融化,影响南亚、东亚地区的水文循环。亚洲乃至北半球,从而引发了一系列严重的环境和社会问题。LAAs,如黑碳和尘埃,可以强烈吸收太阳辐射,并对气候变化产生重大影响。此外,雪/冰上的光吸收杂质(LAI)可以减少雪/冰 青藏高原独特的地理位置和气候特征使得青藏高原LAA有可能引起大气变暖和冰川加速融化,影响南亚、东亚乃至北半球的水文循环,从而造成一系列严重的环境和社会问题。问题。LAAs,如黑碳和尘埃,可以强烈吸收太阳辐射,并对气候变化产生重大影响。此外,雪/冰上的光吸收杂质(LAI)可以减少雪/冰 青藏高原独特的地理位置和气候特征使得青藏高原LAA有可能引起大气变暖和冰川加速融化,影响南亚、东亚乃至北半球的水文循环,从而造成一系列严重的环境和社会问题。问题。LAAs,如黑碳和尘埃,可以强烈吸收太阳辐射,并对气候变化产生重大影响。此外,雪/冰上的光吸收杂质(LAI)可以减少雪/冰 能强烈吸收太阳辐射,并对气候变化产生显着影响。此外,雪/冰上的光吸收杂质(LAI)可以减少雪/冰 能强烈吸收太阳辐射,并对气候变化产生显着影响。此外,雪/冰上的光吸收杂质(LAI)可以减少雪/冰反照率并进一步加速冰雪融化。青藏高原上的LAA和LAI均能诱发热力学反馈过程,引起青藏高原显着增温,进而导致早期季风增强,影响随后的季风演化。关于 TP LAAs 如何调节亚洲气候系统的相位、强度和振幅,已经提出了许多机制。综合了关于 TP LAA 及其气候影响的广泛的理论、观测和建模结果,其中来自旱地的尘埃气溶胶和来自生物质燃烧的黑碳被认为是主要组件。通过将综合方法与最先进的建模相结合,高时间和精细空间分辨率的遥感观测以及增加对 TP 的采样将提供对 TP 气溶胶的进一步见解。

更新日期:2022-07-08
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