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Schroeder, Roy A.; Orem, William H.; Kharaka, Yousif K.

doi:10.1023/a:1016557012305

Cited by 56 publications

(10 citation statements)

References 29 publications

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“…The circumstances of this lake's origin have given rise to a singular hydrological environment, since its endorheic character in concert with the resultant cycle of evaporation and continued inflow has meant that mineral salts have accumulated over the decades and led to the currently prevalent hypersaline conditions [Cook et al, 2002]. Additional materials, derived from agricultural runoff, have also reached high concentrations both in the lake water and the lake floor sediments and have produced a eutrophic lacustrine ecosystem [Schroeder et al, 2002;de Vlaming et al, 2004] that itself releases an estimated 5700 Mg/year of ammonia into the atmosphere [Amrhein et al, 2007].…”

Section: Introductionmentioning

confidence: 99%

Remotely sensed ammonia emission from fumarolic vents associated with a hydrothermally active fault in the Salton Sea Geothermal Field, California

et al. 2011

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Airborne hyperspectral imaging surveys were conducted over a geothermally active region straddling the southeastern shore of the Salton Sea in Southern California. The imagery was acquired across the 7.6–13.5 μm longwave‐infrared region with a ground sample distance of approximately 1 m. Prominent thermal hot spots associated with fumaroles along a known fault line were observed to coincide with emission of free ammonia, presumed to originate from geothermally induced pyrolytic decomposition of nitrogenous compounds that permeate the lake water, sediment, and adjacent agricultural terrain. It is shown that the inferred fluxes of ammonia constitute a significant fraction (0.8–2.5%) of the total atmospheric ammonia burden assessed for the Salton Sea environs and represent a previously unreported source for that locale.

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Section: Introductionmentioning

confidence: 99%

Remotely sensed ammonia emission from fumarolic vents associated with a hydrothermally active fault in the Salton Sea Geothermal Field, California

et al. 2011

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“…Selenium is also associated with anthropogenic emissions, but microbial Se volatilization could occur in Salton Sea sediments and playas and increase Se content of ambient PM after atmospheric oxidation. ,, These processes would be most important during hot months and near the Salton Sea, as is observed in this data set (Figure S11). Selenium EFs were highest at WI, which is closest to the sea.…”

Section: Resultsmentioning

confidence: 62%

“…The elements Na, Ca, K, Mg, Sr, Se, and U displayed strong decreasing EF trends from south to north, with the highest enrichments occurring at WI or SB (Figure ). Notably, these elements are commonly associated with evaporite minerals (Na, Ca, K, Mg, Sr), have been observed at high concentrations in Salton Sea subaqueous sediments or waters (Se, U, Ca, Na), , or have been observed in the Salton Sea playa (Na, Ca, Se). , This trend likely reflects the importance of playa and sea spray emissions (from the Salton Sea, Sea Spray) to PM composition within the southern sections of the Salton Sea Basin.…”

Section: Resultsmentioning

confidence: 97%

Dust Sources in the Salton Sea Basin: A Clear Case of an Anthropogenically Impacted Dust Budget

Frie

Garrison

Schaefer

et al. 2019

Environ. Sci. Technol.

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The Salton Sea Basin in California suffers from poor air quality, and an expanding dry lakebed (playa) presents a new potential dust source. In 2017−18, depositing dust was collected approximately monthly at five sites in the Salton Sea Basin and analyzed for total elemental and soluble anion content. These data were analyzed with Positive Matrix Factorization (PMF). The PMF method resolved seven dust sources with distinct compositional markers: Playa (Mg, SO 4 2− , Na, Ca, Sr), Colorado Alluvium (U, Ca), Local Alluvium (Al, Fe, Ti), Agricultural Burning (K, PO 4 3− ), Sea Spray (Na, Cl − , Se), Anthropogenic Trace Metals (Sb, As, Zn, Cd, Pb, Na), and Anthropogenic Copper (Cu). All sources except Local Alluvium are influenced or caused by current or historic anthropogenic activities. PMF attributed 55 to 80% of the measured dust flux to these six sources. The dust fluxes at the site where the playa source was dominant (89 g m −2 yr −1 ) were less than, but approaching the scale of, those observed at Owens Lake playas in the late 20th century. Playa emissions in the Salton Sea region were most intense during the late spring to early summer and contain high concentrations of evaporite mineral tracers, particularly Mg, Ca, and SO 4 2− .

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“…Playa soils were significantly ( p ≤ 0.05) more enriched in Na, Ca, Se than desert soils. Increased concentrations of these elements have previously been observed within Salton Sea sediments and waters; ,, these elements were likely deposited during the playa formation.…”

Section: Results and Discussionmentioning

confidence: 71%

“…Summer median Se EFs were 7 times greater than winter, suggesting that Se volatilization from the sediments/soil and condensation onto PM is an important process at the Salton Sea. Previous investigations of Se volatilization at the Salton Sea by Schroeder et al (2002) reported gradients of volatile Se species occurring within the water column, providing evidence that volatilization within sediments was occurring . Despite this, Se volatilization from sediments was not previously thought to play a large role in the Salton Sea Se budget and mass balanced was achieved accounting for Se only within the aqueous phase, sediments, and biomass.…”

Section: Results and Discussionmentioning

confidence: 99%

The Effect of a Receding Saline Lake (The Salton Sea) on Airborne Particulate Matter Composition

Frie

Dingle

Ying

et al. 2017

Environ. Sci. Technol.

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The composition of ambient particulate matter (PM) and its sources were investigated at the Salton Sea, a shrinking saline lake in California. To investigate the influence of playa exposure on PM composition, PM samples were collected during two seasons and at two sites around the Salton Sea. To characterize source composition, soil samples were collected from local playa and desert surfaces. PM and soil samples were analyzed for 15 elements using mass spectrometry and X-ray diffraction. The contribution of sources to PM mass and composition was investigated using Al-referenced enrichment factors (EFs) and source factors resolved from positive matrix factorization (PMF). Playa soils were found to be significantly enriched in Ca, Na, and Se relative to desert soils. PMF analysis resolved the PM data with four source factors, identified as Playa-like, Desert-like, Ca-rich, and Se. Playa-like and desert-like sources were estimated to contribute to a daily average of 8.9% and 45% of PM mass, respectively. Additionally, playa sources were estimated to contribute to 38-68% of PM Na. PM Se concentrations showed strong seasonal variations, suggesting a seasonal cycle of Se volatilization and recondensation. These results support the importance of playas as a source of PM mass and a controlling factor of PM composition.

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Cited by 56 publications

References 29 publications

Remotely sensed ammonia emission from fumarolic vents associated with a hydrothermally active fault in the Salton Sea Geothermal Field, California

Remotely sensed ammonia emission from fumarolic vents associated with a hydrothermally active fault in the Salton Sea Geothermal Field, California

Dust Sources in the Salton Sea Basin: A Clear Case of an Anthropogenically Impacted Dust Budget

The Effect of a Receding Saline Lake (The Salton Sea) on Airborne Particulate Matter Composition

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