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Impact of aerosol indirect effect on surface temperature over East Asia

机译：气溶胶间接效应对东亚地区地表温度的影响

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摘要

A regional coupled climate-chemistry-aerosol model is developed to examine the impacts of anthropogenic aerosols on surface temperature and precipitation over East Asia. Besides their direct and indirect reduction of short-wave solar radiation, the increased cloudiness and cloud liquid water generate a substantial downward positive long-wave surface forcing; consequently, nighttime temperature in winter increases by +0.7℃, and the diurnal temperature range decreases by -0.7℃ averaged over the industrialized parts of China. Confidence in the simulated results is limited by uncertainties in model cloud physics. However, they are broadly consistent with the observed diurnal temperature range decrease as reported in China, suggesting that changes in downward longwave radiation at the surface are important in understanding temperature changes from aerosols.
机译：建立了区域耦合的气候-化学-气溶胶模型，以研究人为气溶胶对东亚地区地表温度和降水的影响。除了直接和间接减少短波太阳辐射外，增加的混浊和云状液态水还会产生大量向下的正长波表面强迫。因此，冬季的夜间温度在中国工业化地区平均升高了+0.7℃，而昼间温度范围平均降低了-0.7℃。对模型结果的信心受到模型云物理不确定性的限制。但是，它们与中国报道的观测到的昼夜温度范围下降大致一致，这表明在地面的向下长波辐射变化对于理解气溶胶的温度变化非常重要。

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