Recently, Anderson et al. (2012, https://doi.org/10.1126/science.1222978, 2017, https://doi.org/10.1073/pnas.1619318114) and Anderson and Clapp (2018, https://doi.org/10.1039/C7CP08331A) proposed that summertime convectively injected water vapor over North America could lead to stratospheric ozone depletion through halogenic catalytic reactions. Such ozone loss would reduce the ozone column and increase erythemal daily dose (EDD). Using 10 years of observations over the North American monsoon region from the Aura Ozone Monitoring Instrument, we find that the column ozone and EDD has a ~0.8–0.9 spatial correlation with lower stratospheric water vapor measured by the Aura Microwave Limb Sounder. We show that this correlation appears to be due to the elevation of the monsoonal tropopause and associated monsoonal convection. The increase in tropopause altitude reduces the ozone column and increases EDD. We see no apparent evidence of substantial heterogeneous chemical ozone loss in lower stratospheric ozone coincident with the stratospheric monsoonal water vapor enhancement.

中文翻译：

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红斑辐射，臭氧柱和北美季风

最近，安德森等。（2012，https://doi.org/10.1126/science.1222978，2017，https://doi.org/10.1073/pnas.1619318114）和Anderson和Clapp（2018，https://doi.org/10.1039/ C7CP08331A）提出，夏季通过北美对流注入的水蒸气可通过卤素催化反应导致平流层臭氧消耗。这样的臭氧损失将减少臭氧柱并增加红斑日剂量（EDD）。通过使用Aura臭氧监测仪在北美季风地区进行的10年观察，我们发现，臭氧和EDD柱与Aura微波测温仪测得的低平流层水汽具有约0.8-0.9的空间相关性。我们显示出这种相关性似乎是由于季风对流层顶升高和相关的季风对流。对流层顶高度的增加会减少臭氧柱并增加EDD。我们没有看到明显的证据表明平流层下层臭氧与平流层季风水蒸气增强同时发生大量的非均质化学臭氧损失。