Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-8083-2020 |
Seasonal impact of biogenic very short-lived bromocarbons on lowermost stratospheric ozone between 60 degrees N and 60 degrees S during the 21st century | |
Alejandro Barrera, Javier1; Pedro Fernandez, Rafael1,2,3; Iglesias-Suarez, Fernando2; Alberto Cuevas, Carlos2; Lamarque, Jean-Francois4; Saiz-Lopez, Alfonso2 | |
2020-07-13 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:13页码:8083-8102 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina; Spain; USA |
英文摘要 | Biogenic very short-lived bromocarbons (VSLBr) currently represent similar to 25 % of the total stratospheric bromine loading. Owing to their much shorter lifetime compared to anthropogenic long-lived bromine (e.g. halons) and chlorine (e.g. chlorofluorocarbons), the impact of VSLBr on ozone peaks in the lowermost stratosphere, which is a key climatic and radiative atmospheric region. Here we present a modelling study of the evolution of stratospheric ozone and its chemical loss within the tropics and at mid-latitudes during the 21st century. Two different experiments are explored: considering and neglecting the additional stratospheric injection of 5 ppt biogenic bromine naturally released from the ocean. Our analysis shows that the inclusion of VSLBr results in a realistic stratospheric bromine loading and improves the agreement between the model and satellite observations of the total ozone column (TOC) for the 1980-2015 period at mid-latitudes. We show that the overall ozone response to VSLBr at mid-latitudes follows the stratospheric evolution of long-lived inorganic chlorine and bromine throughout the 21st century. Additional ozone loss due to VSLBr is maximized during the present-day period (1990-2010), with TOC differences of -8 DU (-3 %) and -5.5 DU (-2 %) for the Southern Hemisphere and Northern Hemisphere midlatitudes (SH-MLs and NH-MLs), respectively. Moreover, the projected TOC differences at the end of the 21st century are similar to 50 % lower than the values found for the present-day period. We find that seasonal VSLBr impact on lowermost stratospheric ozone at mid-latitude is influenced by the seasonality of the heterogeneous inorganic-chlorine reactivation processes on ice crystals. Indeed, due to the more efficient reactivation of chlorine reservoirs (mainly ClONO2 and HCl) within the colder SH-ML lowermost stratosphere, the seasonal VSLBr impact shows a small but persistent hemispheric asymmetry through the whole modelled period. Our results indicate that, although the overall VSLBr -driven ozone destruction is greatest during spring, the halogen-mediated (Halog(x-Loss)) ozone loss cycle in the mid-latitude lower-most stratosphere during winter is comparatively more efficient than the HOx cycle with respect to other seasons. Indeed, when VSLBr are considered, Halog(x-Loss) dominates wintertime lowermost stratospheric ozone loss at SH-MLs between 1985 and 2020, with a contribution of inter-halogen ClOx-BrOx cycles to Halog(x-Loss) of similar to 50 %. Within the tropics, a small (< -2.5 DU) and relatively constant (similar to -1 %) ozone depletion mediated by VSLBr is closely related to their fixed emissions throughout the modelled period. By including the VSLBr sources, the seasonal Halog(x-Loss) contribution to lowermost stratospheric ozone loss is practically dominated by the BrOx cycle, reflecting the low sensitivity of very short-lived (VSL) bromine to background halogen abundances to drive tropical stratospheric ozone depletion. We conclude that the link between biogenic bromine sources and seasonal changes in heterogeneous chlorine reactivation is a key feature for future projections of mid-latitude lowermost stratospheric ozone during the 21st century. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000550800600001 |
WOS关键词 | ANTARCTIC OZONE ; CIRRUS CLOUDS ; CHLORINE ACTIVATION ; IODINE CHEMISTRY ; RETURN DATES ; BROMINE ; DEPLETION ; CLIMATE ; TROPOPAUSE ; EMISSIONS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/284220 |
专题 | 地球科学 |
作者单位 | 1.FCEN UNCuyo, Natl Res Council ICB CONICET, Inst Interdisciplinary Sci, RA-5500 Mendoza, Argentina; 2.CSIC, Dept Atmospher Chem & Climate, Inst Phys Chem Rocasolano, Madrid 28006, Spain; 3.UTN FRM, Atmospher & Environm Studies Grp GEAA, RA-5500 Mendoza, Argentina; 4.Natl Ctr Atmospher Res, Atmospher Chem Observat & Modelling Lab, Boulder, CO 80301 USA |
推荐引用方式 GB/T 7714 | Alejandro Barrera, Javier,Pedro Fernandez, Rafael,Iglesias-Suarez, Fernando,et al. Seasonal impact of biogenic very short-lived bromocarbons on lowermost stratospheric ozone between 60 degrees N and 60 degrees S during the 21st century[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(13):8083-8102. |
APA | Alejandro Barrera, Javier,Pedro Fernandez, Rafael,Iglesias-Suarez, Fernando,Alberto Cuevas, Carlos,Lamarque, Jean-Francois,&Saiz-Lopez, Alfonso.(2020).Seasonal impact of biogenic very short-lived bromocarbons on lowermost stratospheric ozone between 60 degrees N and 60 degrees S during the 21st century.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(13),8083-8102. |
MLA | Alejandro Barrera, Javier,et al."Seasonal impact of biogenic very short-lived bromocarbons on lowermost stratospheric ozone between 60 degrees N and 60 degrees S during the 21st century".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.13(2020):8083-8102. |
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