Record-breaking aerosol levels explained by smoke injection into the stratosphere

doi:10.1126/science.abe1415

GSTDTAP > 气候变化

DOI	10.1126/science.abe1415
	Record-breaking aerosol levels explained by smoke injection into the stratosphere
	Eitan Hirsch; Ilan Koren
	2021-03-19
发表期刊	Science
出版年	2021
英文摘要	Intense, widespread bushfires in Australia injected huge amounts of smoke into the stratosphere in 2020. Hirsch and Koren found that this smoke caused record-breaking levels of aerosols over the Southern Hemisphere, as much as that from a moderate volcanic eruption. The severity was caused by a combination of the vigor of the fires and their location at a latitude with a shallow tropopause and within the midlatitude cyclones belt. This aerosol increase caused considerable cooling over oceanic cloud-free areas. Science , this issue p. [1269][1] The early months of 2020 showed record-breaking levels of aerosol optical depth (AOD) over the Southern Hemisphere (SH). Apart from the tropics, monthly AOD values over most of the SH exceeded the average by more than three standard deviations. This anomalous AOD is attributed to a combination of the intensity and location of the Australian bushfires. The fires took place south enough, where the tropopause altitude is relatively low, within the mid-latitude cyclone belt. This location allowed for deep convection over and downwind of the fires, which transported the smoke to the stratosphere, where its lifetime is an order of magnitude longer than it would have been in the lower atmosphere. The lower bound of the stratospheric smoke mass in January 2020 was ~2.1 ± 1 teragrams, which lead to cooling by more than 1.0 ± 0.6 watts per square meter over cloud-free oceanic areas. [1]: /lookup/doi/10.1126/science.abe1415
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/319942
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Eitan Hirsch,Ilan Koren. Record-breaking aerosol levels explained by smoke injection into the stratosphere[J]. Science,2021.
APA	Eitan Hirsch,&Ilan Koren.(2021).Record-breaking aerosol levels explained by smoke injection into the stratosphere.Science.
MLA	Eitan Hirsch,et al."Record-breaking aerosol levels explained by smoke injection into the stratosphere".Science (2021).