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100			_aHooper, James _958918
245			_aDust deposition tracks late Holocene shifts in monsoon activity and the increasing role of human disturbance in the Puna Altiplano, northwest Argentina/
260			_bSage, _c2020.
300			_aVol. 30, issue 4, 2020 ( 519–536 p.).
520			_aThe Puna-Altiplano plateau represents a regionally significant dust source, which is critically located at the nexus between the tropical and sub-polar synoptic systems that dominate the South American climate. Dust emissions in this region would therefore be expected to be sensitive to changes in these systems, in particular the strength and position of the South American Summer Monsoon (SASM). Here, we present a late-Holocene multi-proxy study where changes in dust flux, reconstructed from a high-altitude peat mire, are examined in light of climate variability and human impacts. Results show that for most the 4300 cal. yr BP record, dust flux sensitively tracked changes in SASM activity. Prior to 2600 cal. yr BP relatively high dust flux implies dry conditions prevailed across the Puna-Altiplao in association with reduced SASM activity. The chemistry of dust deposited at this time matched the large endorheic basins on the Puna, which host ephemeral lakes and terminal fans, indicating these were actively supplying dust to the airstream. After 2600 cal. yr BP, SASM activity increased while dust flux decreased and the dust chemistry changed, collectively implying the shutting down of the Puna-Altiplano as a significant dust source. Dust flux increased after 1000 cal. yr BP during the ‘Medieval Warm Period’, associated with a return to drier conditions and reactivation of dust sources across the endorheic basins of the Puna. Natural variability in dust flux was dwarfed, however, by the very significant increase in flux after 400 cal. yr BP following Spanish Colonisation and associated changing landuse practices. This finding attests to the globally significant role of humans on dust emissions.
700			_aMarx, Samuel K _958919
700			_aMay, Jan-Hendrik _958920
700			_aLupo, Liliana C _958921
700			_aKulemeyer, Julio J _958922
700			_aPereira, Elizabeth De Los A _958923
700			_aSeki, Osamu _958924
700			_aHeijnis, Henk _958925
700			_aChild, David _958926
700			_aGadd, Patricia _958927
700			_aZawadzki, Atun _958928
773	0		_012756 _917200 _dLondon: Sage Publication Ltd, 2019. _tHolocene/ _x09596836
856			_uhttps://doi.org/10.1177/0959683619895814
942			_2ddc _cEJR
999			_c15051 _d15051