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Year-Round Atmospheric Wet and Dry Deposition of Nitrogen and Phosphorus on Water and Land Surfaces in Nanjing, China

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The dry deposition of ammonium, nitrate, and total phosphorus (TP) to both water (DW) and land (DD) surfaces, along with wet deposition, were simultaneously monitored from March 2009 to February 2011 in Nanjing, China. Results showed that wet deposition of total phosphorus was 1.1 kg phosphorus ha −1yr−1, and inorganic nitrogen was 28.7 kg nitrogen ha −1yr−1, with 43% being ammonium nitrogen. Dry deposition of ammonium, nitrate, and total phosphorus, measured by the DW/DD method, was 7.5/2.2 kg nitrogen ha −1yr−1, 6.3/4.9 kg nitrogen ha −1yr−1, and 1.9/0.4 kg phosphorus ha −1yr−1, respectively. Significant differences between the DW and DD methods indicated that both methods should be employed simultaneously when analyzing deposition to aquatic and terrestrial ecosystems in watershed areas. The dry deposition of ammonium, nitrate, and total phosphorus contributed 38%, 28%, and 63%, respectively, to the total deposition in the simulated aquatic ecosystem; this has significance for the field of water eutrophication control.
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Keywords: atmospheric dry deposition; atmospheric wet deposition; methods comparison; nitrogen; phosphorus; watershed

Document Type: Regular Article

Publication date: 2013-06-01

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