English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Emissions of reactive nitrogen (N) species can affect surrounding ecosystemsvia atmospheric deposition. However, few long-term and multi-sitemeasurements have focused on both the wet and the dry deposition ofindividual N species in large areas of Northern China. Thus, the magnitudeof atmospheric deposition of various N species in Northern China remainsuncertain. In this study, the wet and dry atmospheric deposition ofdifferent N species was investigated during a three-year observationcampaign at ten selected sites in Northern China. The results indicate thatN deposition levels in Northern China were high with a ten-site, three-yearaverage of 60.6 kg N ha−1 yr−1. The deposition levels showedspatial and temporal variation in the range of 28.5–100.4 kg N ha−1 yr−1.Of the annual total deposition, 40% was deposited viaprecipitation, and the remaining 60% was comprised of dry-depositedforms. Compared with gaseous N species, particulate N species were not themajor contributor of dry-deposited N; they contributed approximately 10%to the total flux. On an annual basis, oxidized species accounted for 21%of total N deposition, thereby implying that other forms of gaseous N, suchas NH3, comprised a dominant portion of the total flux. Thecontribution of NO3− to N deposition was enhanced in certain urbanand industrial areas, possibly due to the fossil fuse combustion. Asexpected, the total N deposition in Northern China was significantly largerthan the values reported by national scale monitoring networks in Europe,North America and East Asia because of high rates of wet deposition andgaseous NH3 dry deposition. Taken together, these findings show thatNH3 emissions should be abated to mitigate high N deposition andassociated potential impacts on ecosystems in Northern China. The presentresults improve our understanding of spatio-temporal variations ofmagnitudes, pathways and species of deposited N in the target areas, and areimportant not only to inform conservation and regulatory bodies but also toinitiate further detailed studies. Uncertainties among current observationsunderscore the need to quantify the impact of vegetation on dry depositionand to refine the simulation of dry deposition velocity

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China