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Atmospheric dry deposition in the vicinity of the Salton Sea, California-I: Air pollution and deposition in a desert environment [An article from: Atmospheric Environment]
Book Details
PublisherElsevier
ISBN / ASINB000RR7VMQ
ISBN-13978B000RR7VM1
AvailabilityAvailable for download now
Sales Rank12,186,370
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Air pollutant concentrations and atmospheric dry deposition were monitored seasonally at the Salton Sea, southern California. Measurements of ozone (O"3), nitric acid vapor (HNO"3), ammonia (NH"3), nitric oxide (NO), nitrogen dioxide (NO"2) and sulfur dioxide (SO"2) were performed using passive samplers. Deposition rates of NO"3^-, NH"4^+, Cl^-, SO"4^2^-, Na^+, K^+ and Ca^2^+ to creosote bush branches and nylon filters as surrogate surfaces were determined for one-week long exposure periods. Maximum O"3 values were recorded in spring with 24-h average values of 108.8@mgm^-^3. Concentrations of NO and NO"2 were low and within ranges of the non-urban areas in California (0.4-5.6 and 3.3-16.2@mgm^-^3 ranges, respectively). Concentrations of HNO"3 (2.0-6.7@mgm^-^3) and NH"3 (6.4-15.7@mgm^-^3) were elevated and above the levels typical for remote locations in California. Deposition rates of Cl^-, SO"4^2^-, Na^+, K^+ and Ca^2^+ were related to the influence of sea spray or to suspended soil particles, and no strong enrichments caused by ions originated by human activities were detected. Dry deposition rates of NO"3^- and NH"4^+ were similar to values registered in areas where symptoms of nitrogen saturation and changes in species composition have been described. Deposition of nitrogenous compounds might be contributing to eutrophication processes at the Salton Sea.
Description:
Air pollutant concentrations and atmospheric dry deposition were monitored seasonally at the Salton Sea, southern California. Measurements of ozone (O"3), nitric acid vapor (HNO"3), ammonia (NH"3), nitric oxide (NO), nitrogen dioxide (NO"2) and sulfur dioxide (SO"2) were performed using passive samplers. Deposition rates of NO"3^-, NH"4^+, Cl^-, SO"4^2^-, Na^+, K^+ and Ca^2^+ to creosote bush branches and nylon filters as surrogate surfaces were determined for one-week long exposure periods. Maximum O"3 values were recorded in spring with 24-h average values of 108.8@mgm^-^3. Concentrations of NO and NO"2 were low and within ranges of the non-urban areas in California (0.4-5.6 and 3.3-16.2@mgm^-^3 ranges, respectively). Concentrations of HNO"3 (2.0-6.7@mgm^-^3) and NH"3 (6.4-15.7@mgm^-^3) were elevated and above the levels typical for remote locations in California. Deposition rates of Cl^-, SO"4^2^-, Na^+, K^+ and Ca^2^+ were related to the influence of sea spray or to suspended soil particles, and no strong enrichments caused by ions originated by human activities were detected. Dry deposition rates of NO"3^- and NH"4^+ were similar to values registered in areas where symptoms of nitrogen saturation and changes in species composition have been described. Deposition of nitrogenous compounds might be contributing to eutrophication processes at the Salton Sea.
