Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-2229-2017 |
Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations | |
Berthet, Gwenael1; Jegou, Fabrice1; Catoire, Valery1; Krysztofiak, Gisele1; Renard, Jean-Baptiste1; Bourassa, Adam E.2; Degenstein, Doug A.2; Brogniez, Colette3; Dorf, Marcel4,9; Kreycy, Sebastian4; Pfeilsticker, Klaus4; Werner, Bodo4; Lefevre, Franck5; Roberts, Tjarda J.1; Lurton, Thibaut1; Vignelles, Damien1; Begue, Nelson6; Bourgeois, Quentin7,8; Daugeron, Daniel1; Chartier, Michel1; Robert, Claude1; Gaubicher, Bertrand1; Guimbaud, Christophe1 | |
2017-02-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Canada; Germany; Sweden |
英文摘要 | The major volcanic eruption of Mount Pinatubo in 1991 has been shown to have significant effects on stratospheric chemistry and ozone depletion even at midlatitudes. Since then, only "moderate" but recurrent volcanic eruptions have modulated the stratospheric aerosol loading and are assumed to be one cause for the reported increase in the global aerosol content over the past 15 years. This particularly enhanced aerosol context raises questions about the effects on stratospheric chemistry which depend on the latitude, altitude and season of injection. In this study, we focus on the midlatitude Sarychev volcano eruption in June 2009, which injected 0.9 Tg of sulfur dioxide (about 20 times less than Pinatubo) into a lower stratosphere mainly governed by high-stratospheric temperatures. Together with in situ measurements of aerosol amounts, we analyse high-resolution in situ and/or remote-sensing observations of NO2, HNO3 and BrO from balloon-borne infrared and UV-visible spectrometers launched in Sweden in August-September 2009. It is shown that differences between observations and three-dimensional (3-D) chemistry-transport model (CTM) outputs are not due to transport calculation issues but rather reflect the chemical impact of the volcanic plume below 19 km altitude. Good measurement-model agreement is obtained when the CTM is driven by volcanic aerosol loadings derived from in situ or space-borne data. As a result of enhanced N2O5 hydrolysis in the Sarychev volcanic aerosol conditions, the model calculates reductions of similar to 45% and increases of similar to 11% in NO2 and HNO3 amounts respectively over the August-September 2009 period. The decrease in NOx abundances is limited due to the expected saturation effect for high aerosol loadings. The links between the various chemical catalytic cycles involving chlorine, bromine, nitrogen and HOx compounds in the lower stratosphere are discussed. The increased BrO amounts (similar to 22 %) compare rather well with the balloon-borne observations when volcanic aerosol levels are accounted for in the CTM and appear to be mainly controlled by the coupling with nitrogen chemistry rather than by enhanced BrONO2 hydrolysis. We show that the chlorine partitioning is significantly controlled by enhanced BrONO2 hydrolysis. However, simulated effects of the Sarychev eruption on chlorine activation are very limited in the high-temperature conditions in the stratosphere in the period considered, inhibiting the effect of ClONO2 hydrolysis. As a consequence, the simulated chemical ozone loss due to the Sarychev aerosols is low with a reduction of -22 ppbv (-1.5 %) of the ozone budget around 16 km. This is at least 10 times lower than the maximum ozone depletion from chemical processes (up to -20 %) reported in the Northern Hemisphere lower stratosphere over the first year following the Pinatubo eruption. This study suggests that moderate volcanic eruptions have limited chemical effects when occurring at midlatitudes (restricted residence times) and outside winter periods (high-temperature conditions). However, it would be of interest to investigate longer-lasting tropical volcanic plumes or sulfur injections in the wintertime low-temperature conditions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395118000002 |
WOS关键词 | IN-SITU MEASUREMENTS ; NEAR-INFRARED DOMAINS ; HETEROGENEOUS BROMINE CHEMISTRY ; SUMMER POLAR STRATOSPHERE ; MOUNT-PINATUBO ERUPTION ; SULFURIC-ACID ; PHYSICAL-PROPERTIES ; OZONE DEPLETION ; SATELLITE MEASUREMENTS ; DIFFERENT LATITUDES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/30805 |
专题 | 地球科学 |
作者单位 | 1.Univ Orleans, CNRS, UMR 7328, Lab Phys & Chim Environm & Espace LPC2E, Orleans, France; 2.Univ Saskatchewan, Inst Space & Atmospher Studies, Saskatoon, SK, Canada; 3.Univ Lille 1 Sci & Technol, CNRS, UMR 8518, Opt Atmospher Lab, Villeneuve Dascq, France; 4.Heidelberg Univ, Inst Environm Phys, Heidelberg, Germany; 5.UPMC, Univ Paris 06, Univ Versailles St Quentin, CNRS,UMR 8190,Lab Atmospheres Milieux Observat Sp, Paris, France; 6.Univ Reunion, CNRS, UMR 8105, Lab Atmosphere & Cyclones, St Denis, France; 7.Stockholm Univ, Dept Meteorol, Stockholm, Sweden; 8.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 9.Max Planck Inst Chem, Dept Atmospher Chem, Mainz, Germany |
推荐引用方式 GB/T 7714 | Berthet, Gwenael,Jegou, Fabrice,Catoire, Valery,et al. Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Berthet, Gwenael.,Jegou, Fabrice.,Catoire, Valery.,Krysztofiak, Gisele.,Renard, Jean-Baptiste.,...&Guimbaud, Christophe.(2017).Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Berthet, Gwenael,et al."Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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