这是mass-calculation。我们将考虑一个列的大气与1 m×1 m的足迹。这一列重约10000公斤(每平方米)。在这些天的气候变化我们将假定当前平均有限公司<子> < /订阅>浓度400 ppm,产生的总质量有限公司<子> 2本专栏的< /订阅> 4公斤。雨不洗掉整个大气层的厚度只有(一般)对流层的最低。慷慨,我们将假设一些2.5公斤4公斤的CO 2 <子> < /订阅>是由雨滴可以回收。现在考虑一个cloudburst的雨滴,相当于大约100毫米在地上。我们有0.1立方米,或100公斤,雨滴在我们平方米空气柱的下降。的溶解度有限公司<子> 2 < /订阅>空气强烈依赖于温度,每公斤2.5 g在10度C,但在如此低的温度下我们无法达到100毫米的降雨,所以我们会妥协约1.5克每公斤25°C。因此,假设2完成有限公司<子> < /订阅>饱和雨滴内(不太可能)我们的100公斤的雨将包含0.15千克的CO 2 <子> < /订阅>,回收约2.5千克的CO 2 <子> < /订阅>“下雨了”列的空气,或大约6%的低大气CO 2 <子> < /订阅>。 Bear in mind that this assumes an enormous rainfall intensity, 100% CO2 saturation of the water and equilibrium chemical dynamics. After the raindrops hit the ground at least half of it will immediately re-evaporate back into the air, leaving, at absolute most, about 3% of the atmospheric CO2 leached out of the atmosphere that will be available to react with the soil, rock or biosphere. Also consider that this is but one of several important processes affecting CO2 transience, such as photosynthesis, respiration, volcanism, industrial pollution, etc. So the CO2 estimates that you read about are average values. Advection and turbulent air mixing should ensure that the CO2 regains approximately normal concentration within an hour or two after rainfall.