A 16-year record of eolian dust in Southern Nevada and California, USA: Controls on dust generation and accumulation

Reheis, Marith C.

doi:10.1016/j.jaridenv.2006.03.006

Cited by 137 publications

(124 citation statements)

References 58 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…Mass fluxes of dust in the SJM measured from the snowpack are approximately 10 g m −2 yr −1 (Lawrence et al, 2010), which is roughly 3 times estimates of bedrock weathering (3 g m −2 yr −1 ) for the SJM (Caine, 1979). Although there is considerable inter-annual variability in our estimates of dust loading, this variability is primarily due to ENSO variability (Reheis, 2006) and thus our estimates of dust loading spanning 5 yr are probably representative of the mean annual dust loading. Moreover our estimates of total annual dust loading are probably fairly conservative as we only measured discrete events in the snowpack during winter months (Lawrence et al, 2010).…”

Section: Nutrient Mass Balance For Alpine Watershedsmentioning

confidence: 81%

Biogeochemical response of alpine lakes to a recent increase in dust deposition in the Southwestern, US

et al. 2011

View full text Add to dashboard Cite

Abstract. The deposition of dust has recently increased significantly over some regions of the western US. Here we explore how changes in dust deposition have affected the biogeochemistry of two alpine watersheds in Colorado, US. We first reconstruct recent changes in the mass accumulation rate of sediments and then we use isotopic measurements in conjunction with a Bayesian mixing model to infer that approximately 95 % of the inorganic fraction of lake sediments is derived from dust. Elemental analyses of modern dust indicate that dust is enriched in Ca, Cr, Cu, Mg, Ni, and in one watershed, Fe and P relative to bedrock. The increase in dust deposition combined with its enrichment in certain elements has altered the biogeochemisty of these systems. Both lakes showed an increase in primary productivity as evidenced by a decrease in carbon isotopic discrimination; however, the cause of increased primary productivity varies due to differences in watershed characteristic. The lake in the larger watershed experienced greater atmospheric N loading and less P loading from the bedrock leading to a greater N:P flux ratio. In contrast, the lake in the smaller watershed experienced less atmospheric N loading and greater P loading from the bedrock, leading to a reduced N:P flux ratio. As a result, primary productivity was more constrained by N availability in the smaller watershed. N-limited primary productivity in the smaller watershed was partly ameliorated by an increase in nitrogen fixation as indicated by reduced nitrogen isotopic values in more contemporary sediments. This study illustrates that alpine watersheds are excellent integrators of changes in atmospheric deposition, but that the biogeochemical response of these watersheds may be mediated by their physical (i.e. watershed area) and chemical (i.e. underlying geology) properties.

show abstract

Section: Nutrient Mass Balance For Alpine Watershedsmentioning

confidence: 81%

Biogeochemical response of alpine lakes to a recent increase in dust deposition in the Southwestern, US

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Continuous multi-year data of deposition flux have been reported for dusts transported from desert areas such as central and eastern Asia (Inoue and Naruse, 1987;Yabuki et al, 2005;Hsu et al, 2009;Sun et al, 2003;Ta et al, 2004;Zhang et al, 1993), North America (Reheis, 2006), and the Middle East and Sahara (Ganor et al, 2003;Offer and Goossens, 2004;Pye, 1992;Nihlén et al, 1995;Loye-Pilot and Martin, 1996). Data of shorter (nearly 1 yr or event basis) periods have been reported much more (e.g.…”

Section: Introductionmentioning

confidence: 99%

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

et al. 2014

View full text Add to dashboard Cite

Abstract. Recent ground networks and satellite remotesensing observations have provided useful data related to spatial and vertical distributions of mineral dust particles in the atmosphere. However, measurements of temporal variations and spatial distributions of mineral dust deposition fluxes are limited in terms of their duration, location, and processes of deposition. To ascertain temporal variations and spatial distributions of mineral dust deposition using wet and dry processes, weekly deposition samples were obtained at Sapporo, Toyama, Nagoya, Tottori, Fukuoka, and Cape Hedo (Okinawa) in Japan during October 2008-December 2010 using automatic wet and dry separating samplers. Mineral dust weights in water-insoluble residue were estimated from Fe contents measured using an X-ray fluorescence analyser. Wet and dry deposition fluxes of mineral dusts were both high in spring and low in summer, showing similar seasonal variations to frequency of aeolian dust events (Kosa) in Japan. For wet deposition, highest and lowest annual dust fluxes were found at Toyama (9.6 g m −2 yr −1 ) and at Cape Hedo (1.7 g m −2 yr −1 ) as average values in 2009 and 2010. Higher wet deposition fluxes were observed at Toyama and Tottori, where frequent precipitation (> 60 % days per month) was observed during dusty seasons. For dry deposition among Toyama, Tottori, Fukuoka, and Cape Hedo, the highest and lowest annual dust fluxes were found respectively at Fukuoka (5.2 g m −2 yr −1 ) and at Cape Hedo (2.0 g m −2 yr −1 ) as average values in 2009 and 2010. The average ratio of wet and dry deposition fluxes was the highest at Toyama (3.3) and the lowest at Hedo (0.82), showing a larger contribution of the dry process at western sites, probably because of the distance from desert source regions and because of the effectiveness of the wet process in the dusty season.Size distributions of refractory dust particles were obtained using four-stage filtration: > 20, > 10, > 5, and > 1 µm diameter. Weight fractions of the sum of > 20 µ m and 10-20 µm (giant fraction) were higher than 50 % for most of the event samples. Irrespective of the deposition type, the giant dust fractions generally decreased with increasing distance from the source area, suggesting the selective depletion of larger giant particles during atmospheric transport. Based on temporal variations of PM c (2.5 < D < 10 µm), ground-based lidar, backward air trajectories, and vertical profiles of potential temperatures, transport processes of dust particles are discussed for events with high-deposition and low-deposition flux with high PM c . Low dry dust depositions with high PM c concentrations were observed under stronger (5 K km −1

show abstract

“…At least for these three units the climate-and overspill-controlled lake level probably was more important. According to Reheis (2006), modern dust fluxes (< 50 m, corresponding to EM 3 to 7) in the arid southwestern United States are between 2 and 20 g/m 2 /a. Assuming a mean raw density for the deposited material of 2 g/cm 3 this relates to a deposition rate of 2.2 mm/ka, which is one order of magnitude lower than the estimates based on the OSL-dated samples.…”

Section: Discussionmentioning

confidence: 99%

Environmental history recorded in aeolian deposits under stone pavements, Mojave Desert, USA

Dietze

Lomax

et al. 2016

Quat. res.

View full text Add to dashboard Cite

Reconstructing the evolution of arid landscapes is challenged by limited availability of appropriate environmental archives. A wide-spread surface feature -stone pavement -traps aeolian fines and forms a special accretionary archive. Seven stone pavement-covered sections on basalt flows in the eastern Mojave Desert are condensed to a composite section, comprising five sedimentological units, supported by an OSL-based chronology. Three of the units are of accretionary nature and each is covered by a stone pavement. They were deposited >50.9-36.6 ka, <36.6-14.2 ka and <14.2 ka and are intimately coupled with the history of nearby Lake Mojave, which advances the current picture of regional aeolian activity. End-member modelling analysis of grain-size distributions yielded seven sediment transport regimes. The accretionary system operates in two modes: A) episodic formation of a stone pavement by lateral processes once a vesicular horizon has formed on a barren surface and B) accretion of dust and eventually burial of the clast layer. These findings improve current concepts about stone pavement evolution and their environmental proxy function in arid landscapes. Stone pavement-covered accretionary deposits are a new key archive that allows quantifying the relative importance of dust accretion, slope processes, soil formation and vegetation cover.

show abstract

A 16-year record of eolian dust in Southern Nevada and California, USA: Controls on dust generation and accumulation

Cited by 137 publications

References 58 publications

Biogeochemical response of alpine lakes to a recent increase in dust deposition in the Southwestern, US

Biogeochemical response of alpine lakes to a recent increase in dust deposition in the Southwestern, US

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

Environmental history recorded in aeolian deposits under stone pavements, Mojave Desert, USA

Contact Info

Product

Resources

About