干旱区生态环境知识资源中心(Arid): Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region

Arid

DOI	10.1177/0959683619875198
	Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region
	Cosentino, Nicolas J.; Gaiero, Diego M.; Torre, Gabriela; Pasquini, Andrea, I; Coppo, Renata; Arce, Juan M.; Velez, Georgina
通讯作者	Cosentino, NJ
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2020
卷号	30 期号:4 页码:575-588
英文摘要	Mineral aerosols profoundly impact global climate. Modeling of the dust cycle is the main tool used to gauge this effect. However, the scarcity of in situ modern dust flux measurements is the main reason why validation of existing models is hampered. We present the first long-term (14-year) record of dust flux in the Pampas, southern South America, home to the largest loess deposit in the Southern Hemisphere. Measured 14-year mean deposition (40 g m(-2) year(-1)) and horizontal (362 g m(-2) year(-1)) fluxes imply that current models underestimate the power of the central Pampas as a dust sink. Based on cross-spectral analysis, both wet and, to a lesser extent, dry deposition are found to play significant roles in atmospheric dust extraction. Dust is sourced regionally from the South American Arid Diagonal and from the shores of Mar Chiquita lake (~260 km), which we find to be the main contributor of dust particles >30 mu m. Cross-spectral and satellite image analyses show that surface wind speed and precipitation at the Puna-Altiplano Plateau are controlling factors for horizontal dust flux in the Pampas. El Nino Southern Oscillation probably plays a role in controlling interannual horizontal dust flux periodicities. Finally, preliminary comparisons between modern vertical dust fluxes and loess accumulation rates point to the Pampas as a more powerful dust sink during the last deglaciation and Antarctic Cold Reversal (18-12.5 ka).
英文关键词	cross-spectral analysis dust flux grain size modern dust Pampas South America
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000532417500008
WOS关键词	AEOLIAN DUST ; SIZE-DISTRIBUTION ; GRAIN-SIZE ; ICE-CORE ; CLIMATE VARIABILITY ; POWER SPECTRA ; CENTRAL ANDES ; EOLIAN DUST ; DEPOSITION ; TRANSPORT
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324441
作者单位	[Cosentino, Nicolas J.; Gaiero, Diego M.; Torre, Gabriela; Pasquini, Andrea, I; Coppo, Renata] Univ Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, Cordoba, Argentina; [Cosentino, Nicolas J.; Gaiero, Diego M.; Torre, Gabriela; Pasquini, Andrea, I; Coppo, Renata] Univ Nacl Cordoba, Consejo Nacl Invest Cient & Tecnol CONICET, Ctr Invest Ciencias Tierra CICTERRA, Ave Velez Sarsfield 1611,Edificio CICTERRA, Cordoba, Argentina; [Arce, Juan M.; Velez, Georgina] INTA, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Cosentino, Nicolas J.,Gaiero, Diego M.,Torre, Gabriela,et al. Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region[J],2020,30(4):575-588.
APA	Cosentino, Nicolas J..,Gaiero, Diego M..,Torre, Gabriela.,Pasquini, Andrea, I.,Coppo, Renata.,...&Velez, Georgina.(2020).Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region.HOLOCENE,30(4),575-588.
MLA	Cosentino, Nicolas J.,et al."Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region".HOLOCENE 30.4(2020):575-588.