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首页> 外文期刊>Atmospheric chemistry and physics >Particulate absorption of solar radiation: Anthropogenic aerosols vs. dust
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Particulate absorption of solar radiation: Anthropogenic aerosols vs. dust

机译：太阳辐射的颗粒吸收：人为气溶胶与粉尘

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摘要

Particulate solar absorption is a critical factor in determining the value and even sign of the direct radiative forcing of aerosols. The heating to the atmosphere and cooling to the Earth's surface caused by this absorption are hypothesized to have significant climate impacts. We find that anthropogenic aerosols play an important role around the globe in total particulate absorption of solar radiation. The global-average anthropogenic fraction in total aerosol absorbing optical depth exceeds 65% in all seasons. Combining the potentially highest dust absorption with the lowest anthropogenic absorption within our model range, this fraction would still exceed 47% in most seasons except for boreal spring (36%) when dust abundance reaches its peak. Nevertheless, dust aerosol is still a critical absorbing constituent over places including North Africa, the entire tropical Atlantic, and during boreal spring in most part of Eurasian continent. The equality in absorbing solar radiation of dust and anthropogenic aerosols appears to be particularly important over Indian subcontinent and nearby regions as well as North Africa.
机译：颗粒的太阳吸收是确定气溶胶直接辐射强迫的值甚至征兆的关键因素。据推测，由这种吸收引起的对大气的加热和对地球表面的冷却会对气候产生重大影响。我们发现，人为的气溶胶在全球总吸收太阳辐射中起着重要作用。在所有季节中，总的人为吸收气溶胶光学深度的全球平均比例超过65％。在我们的模型范围内，将潜在的最高粉尘吸收量与最低的人为吸收量相结合，在大部分季节中，该比例仍将超过47％，但当粉尘丰度达到峰值时，北方春季（36％）除外。尽管如此，在包括北非，整个热带大西洋以及欧亚大陆大部分地区的寒冬期间，粉尘气溶胶仍然是重要的吸收成分。在印度次大陆和附近地区以及北非，吸收灰尘和人为气溶胶的太阳辐射的平等性显得尤为重要。

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