Unified wet deposition data summaries for North America: Data summary procedures and results for 1980–1986

Olsen, A.R.; Voldner, E.C.; Bigelow, David; Chan, Walter H.; Clark, Terry L.; Lusis, M.A.; Misra, P. K.; Vet, Robert

doi:10.1016/0960-1686(90)90021-e

Cited by 31 publications

(17 citation statements)

References 6 publications

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“…For these two sets of analyses the effect of sea salt was not distinguished as a single factor, and the results of factor analysis indicated that soil dust was the most important source of spring aerosols collected in Seoul. It was also confirmed that water-soluble Ca 2+ and Mg 2+ were key indicators of a dust event [Crawley and Sievering, 1986;Olsen et al, 1990], but the contribution of anthropogenic influence could not be ignored. High loadings of K on the factor of secondary aerosol is thought to be the influence of firewood burning in the course of transport [Andreae, 1983].…”

Section: Factor Analysismentioning

confidence: 86%

Chemical composition and source signature of spring aerosol in Seoul, Korea

Choi¹,

Lee²,

Chun³

et al. 2001

J. Geophys. Res.

167

105

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Section: Factor Analysismentioning

confidence: 86%

Chemical composition and source signature of spring aerosol in Seoul, Korea

Choi¹,

Lee²,

Chun³

et al. 2001

J. Geophys. Res.

167

105

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“…Note that the seasonal sulfate concentrations range from a high of 121.7 µeq l −1 at NY08 in 1990 down to 46.8 µeq l −1 at OH71 in 2003, a variation greater than a factor of 2. As with the seasonal data, the data from the five sites in a given year were combined through the standard precipitation-weighting procedure (Olsen et al, 1990) to obtain a smoother representation of the regional chemistry. In this study, we also used daily data for the PA15 site, made available by the Atmospheric Integrated Research Monitoring Network (AIRMoN) via its internet site (see NADP/AIRMoN, 2005), in order to explore the atmospheric conditions controlling the sulfate concentration during isolated extreme events.…”

Section: Methodsmentioning

confidence: 99%

Influences of atmospheric circulation on the variability of wet sulfate deposition

Dayan

Lamb

2007

Intl Journal of Climatology

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Precipitation chemistry data from the National Atmospheric Deposition Program were related to weather data from the Climate Diagnostics Center in order to reveal the influence of large-scale circulation patterns on the wet deposition of sulfate downwind of the Ohio River Valley, where SO 2 emissions were curtailed sharply in the mid-1990s. The chemistry data from five precipitation-sampling sites were combined to provide a regional average for each summer season over the 21-year period from 1984 to 2004. The long-term trend of sulfate concentration is associated to a statistically significant extent by composited flow patterns associated with the East Pacific-North Pacific index. The regional weather pattern for the sulfate-rich years is associated with an intensification of the Bermuda High over the southeastern United States at the surface in tandem with a weakening of the 500-hPa geopotential height (GPH) climatological trough located over the northeastern United States. The highest-sulfate concentration days for the Atmospheric Integrated Research Monitoring Network (AIRMoN) Pennsylvania site occurred during a similar synoptic pattern when intense convection over the eastern United States was favoured thermodynamically. This study suggests that temporal changes in the large-scale circulation pattern over North America need to be considered, in addition to changes in precursor emissions, as an explanation for the decreases in sulfate concentrations observed in summertime rains across the eastern United States.

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“…The data completeness criteria used for the JADS datasets are % TP (the percentage of the total precipitation amount measured during the summary period that is associated with valid samples) and % PCL (the percentage of the summary period for which information on whether precipitation occurred is available) defined by Olsen et al (1990). Following are the JADS data completeness criteria applied to monthly data: a valid monthly volume-weighted mean (VWM) concentration calculated from sample ionic concentration and precipitation amount must meet the following two conditions: (1) % TP is at least 80 % and (2) % PCL is at least 80 % (Ministry of the Environment 2003).…”

Section: Data Completenessmentioning

confidence: 99%

Increases of wet deposition at remote sites in Japan from 1991 to 2009

et al. 2012

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Temporal trends in wet deposition of major ions were explored at nationwide remote sites in Japan from April 1991 to March 2009 by using the seasonal Kendall slope estimator and the nonparametric seasonal Kendall test. For the trend analysis, datasets from eight remote sites (Rishiri, Echizenmisaki, Oki, Ogasawara, Shionomisaki, Goto, Yakushima, and Amami) were selected from the Japanese Acid Deposition Survey (JADS) conducted by the Ministry of the Environment. Deposition of H + has been increasing at remote sites in Japan on a national scale. Significant (p≤0.05) increases in H + deposition were detected with changes of +3-+9 %year −1 at seven sites, while insignificant increases were observed at one site. Depositions of non-sea salt (nss)-SO 4 2− and NO 3 − significantly increased at four and six sites, respectively, with changes of +1-+3 %year −1 . Significant increases in precipitation at four sites would have contributed to the increase in depositions of H + , nss-SO 4 2− , and NO 3 − . The emission trends of SO 2 and NO x did not corresponded to the deposition trends of nss-SO 4 2− and NO 3 − . The different trends indicated that temporal variation of precipitation amount trend dominated the deposition trends.

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Unified wet deposition data summaries for North America: Data summary procedures and results for 1980–1986

Cited by 31 publications

References 6 publications

Chemical composition and source signature of spring aerosol in Seoul, Korea

Chemical composition and source signature of spring aerosol in Seoul, Korea

Influences of atmospheric circulation on the variability of wet sulfate deposition

Increases of wet deposition at remote sites in Japan from 1991 to 2009

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