Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-6759-2017 |
Numerical simulations of windblown dust over complex terrain: the Fiambala Basin episode in June 2015 | |
Mingari, Leonardo A.1,6,7; Collini, Estela A.2,6; Folch, Arnau3; Baez, Walter4; Bustos, Emilce4; Soledad Osores, Maria1,5,6; Reckziegel, Florencia4; Alexander, Peter1,7; Viramonte, Jose G.4 | |
2017-06-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina; Spain |
英文摘要 | On 13 June 2015, the London Volcanic Ash Advisory Centre (VAAC) warned the Buenos Aires VAAC about a possible volcanic eruption from the Nevados Ojos del Salado volcano (6879 m), located in the Andes mountain range on the border between Chile and Argentina. A volcanic ash cloud was detected by the SEVIRI instrument on board the Meteosat Second Generation (MSG) satellites from 14: 00 UTC on 13 June. In this paper, we provide the first comprehensive description of this event through observations and numerical simulations. Our results support the hypothesis that the phenomenon was caused by wind remobilization of ancient pyroclastic deposits (ca. 4.5 ka Cerro Blanco eruption) from the Bolson de Fiambala (Fiambala Basin) in northwestern Argentina. We have investigated the spatiotemporal distribution of aerosols and the emission process over complex terrain to gain insight into the key role played by the orography and the condition that triggered the long-range transport episode. Numerical simulations of windblown dust were performed using the ARW(Advanced Research WRF) core of the WRF (Weather Research and Forecasting) model (WRF-ARW) and FALL3D modeling system with meteorological fields downscaled to a spatial resolution of 2 km in order to resolve the complex orography of the area. Results indicate that favorable conditions to generate dust uplifting occurred in northern Fiambala Basin, where orographic effects caused strong surface winds. According to short-range numerical simulations, dust particles were confined to near-ground layers around the emission areas. In contrast, dust aerosols were injected up to 5-6 km high in central and southern regions of the Fiambala Basin, where intense ascending airflows are driven by horizontal convergence. Long-range transport numerical simulations were also performed to model the dust cloud spreading over northern Argentina. Results of simulated vertical particle column mass were compared with the MSG-SEVIRI retrieval product. We tested two numerical schemes: with the default configuration of the FALL3D model, we found difficulties to simulate transport through orographic barriers, whereas an alternative configuration, using a numerical scheme to more accurately compute the horizontal advection in abrupt terrains, substantially improved the model performance. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403213700001 |
WOS关键词 | VOLCANIC ASH ; MINERAL DUST ; SAHARAN DUST ; SOUTH-AMERICA ; MODEL ; CYCLE ; RESUSPENSION ; PREDICTION ; DYNAMICS ; SYSTEM |
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/30723 |
专题 | 地球科学 |
作者单位 | 1.Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina; 2.SHN, Buenos Aires, DF, Argentina; 3.BSC, Barcelona, Spain; 4.INENCO GEONORTE UNSa CONICET, Salta, Argentina; 5.Comis Nacl Actividades Espaciales CONAE, Buenos Aires, DF, Argentina; 6.SMN, Buenos Aires, DF, Argentina; 7.Inst Fis Buenos Aires IFIBA, Buenos Aires, DF, Argentina |
推荐引用方式 GB/T 7714 | Mingari, Leonardo A.,Collini, Estela A.,Folch, Arnau,et al. Numerical simulations of windblown dust over complex terrain: the Fiambala Basin episode in June 2015[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11). |
APA | Mingari, Leonardo A..,Collini, Estela A..,Folch, Arnau.,Baez, Walter.,Bustos, Emilce.,...&Viramonte, Jose G..(2017).Numerical simulations of windblown dust over complex terrain: the Fiambala Basin episode in June 2015.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11). |
MLA | Mingari, Leonardo A.,et al."Numerical simulations of windblown dust over complex terrain: the Fiambala Basin episode in June 2015".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017). |
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