ISSN:
1573-2932
Schlagwort(e):
Sulfate
;
nitrate
;
wet deposition
;
rainfall amount
;
precipitation scavenging
;
lognormal distribution
;
Japan
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Energietechnik
Notizen:
Abstract A regression model of wet deposition on rainfall amount for non-seasalt sulfate (nss-SO4 2−) and nitrate (NO3 −) was applied to a data set obtained through a nationwide survey from April 1989 to March 1993. Wet-only samples on a biweekly basis were collected at 29 sites over Japan. Reparameterized bivariate lognormal distribution was employed to describe the joint distribution of concentration (C) and rainfall amount (R) for each site. Ranges of geometric mean (μD) of biweekly deposition (D = C. R) for each site were 0.54–2.90 meq m−2 for nss-SU4 2−, and 0.21–1.36 meq m−22 for NO3 −; that of biweekly rainfall amount (μR) was 24.1–78.0 mm. Urban or industrialized areas had high values of μD for these ions. Ranges of estimates of the slope of the regression equation of log(D/μD) on log(R/μR), were 0.45–0.99 for nss-SO4 2−, and 0.35–0.86 for NO3 −; thus estimates of the slope for nss-SO4 2− tend to be larger than those for NO3 −. The present analysis, consequently, statistically clarified some differences between the two ions in deposition processes which is understood in the light of current knowledge of atmospheric chemistry.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01186155
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