NDLI: Seasonal variations of dissolved organic carbon in precipitation over urban and forest sites in central Poland

Content Provider	PubMed Central
Author	Siudek, Patrycja Frankowski, Marcin Siepak, Jerzy
Abstract	Spatial and temporal variability of carbon species in rainwater (bulk deposition) was studied for the first time at two sites located in urban area of Poznań City and protected woodland area (Jeziory), in central Poland, between April and December 2013. The mean concentration of total carbon (TC) for the first site was 5.86 mg L−1, whereas for the second, 5.21 mg L−1. Dissolved organic carbon (DOC) concentration accounted for, on average, 87 and 91 % of total carbon in precipitation at urban and non-urban sites, respectively. Significant changes in TC concentrations in rainwater were observed at both sites, indicating that atmospheric transformation, transport, and removal mechanisms of carbonaceous particles were affected by seasonal fluctuations in biogenic/anthropogenic emission and meteorological conditions (i.e., precipitation height and type, atmospheric transport). During the warm season, the DOC concentration in rainwater was mostly influenced by mixed natural and anthropogenic sources. In contrast, during the cold season, the DOC concentration significantly increased mainly as a result of anthropogenic activities, i.e., intensive coal combustion, domestic wood burning, high-temperature processes, etc. In addition, during the winter measurements, significant differences in mean DOC concentration (Kruskal-Wallis test, p < 0.05) were determined for rain, mixed rain-snow, and snow samples. It was found that rainwater TOC concentration measured in Poznań and Jeziory reflected a combination of local, regional, and distant sources. Backward trajectory analysis showed that air masses advected from polluted regions in western Europe largely affect the DOC amount in rainwater, both at urban and non-urban sites. These data imply that carbonaceous compounds are of crucial importance in atmospheric chemistry and should be considered as an important parameter while considering wet deposition, reactions with different substances, especially over polluted environments.
Related Links	http://dx.doi.org/10.1007/s11356-015-4356-3
Ending Page	11096
Page Count	10
Starting Page	11087
File Format	PDF
ISSN	09441344
e-ISSN	16147499
Journal	Environmental Science and Pollution Research International
Issue Number	14
Volume Number	22
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-07-01
Access Restriction	Open
Rights Holder	Springer Berlin Heidelberg
Subject Keyword	Pollution Health, Toxicology and Mutagenesis Environmental Chemistry Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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