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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >A modeling study on the climate impacts of black carbon aerosols - art. no. D03106
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A modeling study on the climate impacts of black carbon aerosols - art. no. D03106

机译：炭黑气溶胶对气候影响的模型研究-艺术。没有。 D03106

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A three-dimensional interactive aerosol-climate model has been developed and used to study the climatic impact of black carbon (BC) aerosols. When compared with the model's natural variability, significant global-scale changes caused by BC aerosols occurred in surface latent and sensible heat flux, surface net long-wave radiative flux, planetary boundary layer height, convective precipitation (all negative), and low-cloud coverage (positive), all closely related to the hydrological cycle. The most significant regional change caused by BC revealed in this study is in precipitation that occurs in the tropics (shift of precipitation center in the ITCZ) and in the middle and high latitudes of the Northern Hemisphere (change in snow depth). Influenced by BC caused changes in cloud cover and surface albedo, the interactive model provides smaller positive all-sky forcing at the top of atmosphere (TOA) and larger negative forcing at the surface than the offline diagnostics (the direct forcings). The actual solar radiative forcings by BC derived from the interactive model also exhibit significant interannual variations that are up to 4 times as large as their means. Based on the revealed changes in cloud radiative forcing by BC, a non-Twomey-Albrecht indirect forcing by BC that alters radiative budgets by changing cloud cover via thermodynamics rather than microphysics is also defined. It has been demonstrated that with an absolute amount more than 2 times higher than that of the TOA forcing, the surface forcing by BC is a very important factor in analyzing the climatic impact of BC. The result of this study suggests that with a constant annual emission of 14 TgC, BC aerosols do not cause a significant change in global-mean surface temperature. The calculated surface temperature change is determined by a subtle balance among changes in surface energy budget as well as in the hydrological cycle, all caused by BC forcing and often compensate each other. The result of this study shows that the influences of BC aerosols on climate and environment are more significant in regional scale than in global scale. Important feedbacks between BC radiative effects and climate dynamics revealed in this study suggest the importance of using interactive aerosol-climate models to address the issues related to the climate impacts of aerosols. [References: 57]
机译：已经开发了三维交互式气溶胶-气候模型，并用于研究黑碳（BC）气溶胶的气候影响。与模型的自然变异性相比，由BC气溶胶引起的全球尺度变化发生在表面潜热和显热通量，表面净长波辐射通量，行星边界层高度，对流降水（全为负）和低云覆盖（正），都与水文循环密切相关。这项研究揭示的由BC引起的最显着的区域变化是在热带地区（ITCZ的降水中心转移）和北半球中高纬度地区（雪深的变化）发生的降水。受到BC影响，云模型和地表反照率发生了变化，与离线诊断（直接强迫）相比，交互式模型在大气层顶部（TOA）提供了较小的正全天强迫，在地面提供了较大的负强迫。 BC从交互模型得出的实际太阳辐射强迫也表现出明显的年际变化，其最大变化幅度是其均值的4倍。基于BC揭示的云辐射强迫的变化，还定义了BC的非Twomey-Albrecht间接强迫，它通过通过热力学而不是微观物理学来改变云层，从而改变了辐射预算。已经证明，绝对量比TOA强迫的绝对量高2倍以上，BC的表面强迫是分析BC的气候影响的一个非常重要的因素。这项研究的结果表明，以每年14 TgC的恒定排放量，BC气溶胶不会引起全球平均表面温度的显着变化。计算得出的地表温度变化是由地表能量收支和水文循环中微妙的平衡所决定的，这些平衡都是由卑诗省强迫造成的，并且常常相互补偿。研究结果表明，BC气溶胶对气候和环境的影响在区域范围内比在全球范围内更为显着。在这项研究中揭示的不列颠哥伦比亚省辐射效应与气候动力学之间的重要反馈表明，使用交互式气溶胶-气候模型来解决与气溶胶的气候影响有关的问题非常重要。 [参考：57]

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