scholarly journals Chemical footprints of anthropogenic nitrogen deposition on recent soil C : N ratios in Europe

2015 ◽  
Vol 12 (5) ◽  
pp. 4315-4330 ◽  
Author(s):  
C. Mulder ◽  
J.-P. Hettelingh ◽  
L. Montanarella ◽  
M. R. Pasimeni ◽  
M. Posch ◽  
...  
Keyword(s):  
Land Use ◽  
Atmospheric Deposition ◽  
Nitrogen Deposition ◽  
Industrial Revolution ◽  
Terrestrial Ecosystems ◽  
Soil C ◽  
Human Interactions ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

Abstract. Long-term human interactions with landscape and nature produced a plethora of trends and patterns of environmental disturbances in time and space. Nitrogen deposition, closely tracking energy and land use, is known to be among the main pollution drivers, affecting both freshwater as terrestrial ecosystems. We investigated the geographical distribution of nitrogen deposition and the impacts of accumulation on recent soil carbon to nitrogen ratios over Europe. After the Second Industrial Revolution (1880–2010), large landscape stretches characterized by different atmospheric deposition caused either by industrialized areas or by intensive agriculture emerged. Nitrogen deposition affects in a still recognizable way recent soil C : N ratios despite the emission abatement of oxidized and reduced nitrogen during the last two decades. Given the seemingly disparate land-use history, we focused on ~ 10 000 unmanaged ecosystems, providing evidence for a rapid response of nature to chronic nitrogen supply by atmospheric deposition.

scholarly journals Chemical footprints of anthropogenic nitrogen deposition on recent soil C : N ratios in Europe

2015 ◽  
Vol 12 (13) ◽  
pp. 4113-4119 ◽  
Author(s):  
C. Mulder ◽  
J.-P. Hettelingh ◽  
L. Montanarella ◽  
M. R. Pasimeni ◽  
M. Posch ◽  
...  
Keyword(s):  
Land Use ◽  
Atmospheric Deposition ◽  
Nitrogen Deposition ◽  
Industrial Revolution ◽  
Terrestrial Ecosystems ◽  
Nitrogen Emissions ◽  
Soil C ◽  
Human Interactions ◽  
Anthropogenic Nitrogen

Abstract. Long-term human interactions with the natural landscape have produced a plethora of trends and patterns of environmental disturbances across time and space. Nitrogen deposition, closely tracking energy and land use, is known to be among the main drivers of pollution, affecting both freshwater and terrestrial ecosystems. We present a statistical approach for investigating the historical and geographical distribution of nitrogen deposition and the impacts of accumulation on recent soil carbon-to-nitrogen ratios in Europe. After the second Industrial Revolution, large swaths of land emerged characterized by different atmospheric deposition patterns caused by industrial activities or intensive agriculture. Nitrogen deposition affects soil C : N ratios in a still recognizable way despite the abatement of oxidized and reduced nitrogen emissions during the last 2 decades. Given a seemingly disparate land-use history, we focused on ~ 10 000 unmanaged ecosystems, providing statistical evidence for a rapid response of nature to the chronic nitrogen supply through atmospheric deposition.

scholarly journals Responses of surface ozone air quality to anthropogenic nitrogen deposition in the Northern Hemisphere

2017 ◽  
Vol 17 (16) ◽  
pp. 9781-9796 ◽  
Author(s):  
Yuanhong Zhao ◽  
Lin Zhang ◽  
Amos P. K. Tai ◽  
Youfan Chen ◽  
Yuepeng Pan
Keyword(s):  
Land Use ◽  
Air Quality ◽  
Nitrogen Deposition ◽  
Northern Hemisphere ◽  
Dry Deposition ◽  
Surface Ozone ◽  
Land Use Changes ◽  
Nox Emissions ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

Abstract. Human activities have substantially increased atmospheric deposition of reactive nitrogen to the Earth's surface, inducing unintentional effects on ecosystems with complex environmental and climate consequences. One consequence remaining unexplored is how surface air quality might respond to the enhanced nitrogen deposition through surface–atmosphere exchange. Here we combine a chemical transport model (GEOS-Chem) and a global land model (Community Land Model, CLM) to address this issue with a focus on ozone pollution in the Northern Hemisphere. We consider three processes that are important for surface ozone and can be perturbed by the addition of atmospheric deposited nitrogen – namely, emissions of biogenic volatile organic compounds (VOCs), ozone dry deposition, and soil nitrogen oxide (NOx) emissions. We find that present-day anthropogenic nitrogen deposition (65 Tg N a−1 to the land), through enhancing plant growth (represented as increases in vegetation leaf area index, LAI, in the model), could increase surface ozone from increased biogenic VOC emissions (e.g., a 6.6 Tg increase in isoprene emission), but it could also decrease ozone due to higher ozone dry deposition velocities (up to 0.02–0.04 cm s−1 increases). Meanwhile, deposited anthropogenic nitrogen to soil enhances soil NOx emissions. The overall effect on summer mean surface ozone concentrations shows general increases over the globe (up to 1.5–2.3 ppbv over the western US and South Asia), except for some regions with high anthropogenic NOx emissions (0.5–1.0 ppbv decreases over the eastern US, western Europe, and North China). We compare the surface ozone changes with those driven by the past 20-year climate and historical land use changes. We find that the impacts from anthropogenic nitrogen deposition can be comparable to the climate- and land-use-driven surface ozone changes at regional scales and partly offset the surface ozone reductions due to land use changes reported in previous studies. Our study emphasizes the complexity of biosphere–atmosphere interactions, which can have important implications for future air quality prediction.

scholarly journals Responses of surface ozone air quality to anthropogenic nitrogen deposition in the Northern Hemisphere

2017 ◽  
Author(s):  
Yuanhong Zhao ◽  
Lin Zhang ◽  
Amos P. K. Tai ◽  
Youfan Chen ◽  
Yuepeng Pan
Keyword(s):  
Land Use ◽  
Air Quality ◽  
Nitrogen Deposition ◽  
Northern Hemisphere ◽  
Dry Deposition ◽  
Surface Ozone ◽  
Land Use Changes ◽  
Nox Emissions ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

Abstract. Human activities have substantially increased atmospheric deposition of reactive nitrogen to the Earth’s surface, inducing unintentional effects on ecosystems with complex environmental and climate consequences. One consequence remaining unexplored is how surface air quality might respond to the enhanced nitrogen deposition through surface-atmosphere exchange. Here we combine a chemical transport model (GEOS-Chem) and a global land model (Community Land Model) to address this issue with a focus on ozone pollution in the Northern Hemisphere. We consider three processes that are important for surface ozone and can be perturbed by addition of atmospheric deposited nitrogen, namely, emissions of biogenic volatile organic compounds (VOCs), ozone dry deposition, and soil nitrogen oxide (NOx) emissions. We find that present-day anthropogenic nitrogen deposition (65 Tg N a−1 to the land), through enhancing plant growth (represented as increases in vegetation leaf area index (LAI) in the model), could increase surface ozone from increased biogenic VOC emissions (e.g., a 6.6 Tg increase in isoprene emission), but could also decrease ozone due to higher ozone dry deposition velocities (up to 0.02–0.04 cm s−1 increases). Meanwhile, deposited anthropogenic nitrogen to soil enhances soil NOx emissions. The overall effect on summer mean surface ozone concentrations show general increases over the globe (up to 1.5–2.3 ppbv over the western US and South Asia), except for some regions with high anthropogenic NOx emissions (0.5–1.0 ppbv decreases over the eastern US, Western Europe, and North China). We compare the surface ozone changes with those driven by the past 20-year climate and historical land use changes. We find that the impacts from anthropogenic nitrogen deposition can be comparable to the climate and land use driven surface ozone changes at regional scales, and partly offset the surface ozone reductions due to land use changes reported in previous studies. Our study emphasizes the complexity of biosphere-atmosphere interactions, which can have important implications for future air quality prediction.

21st-century rise in anthropogenic nitrogen deposition on a remote coral reef

Science ◽  
2017 ◽  
Vol 356 (6339) ◽  
pp. 749-752 ◽  
Author(s):  
Haojia Ren ◽  
Yi-Chi Chen ◽  
Xingchen T. Wang ◽  
George T. F. Wong ◽  
Anne L. Cohen ◽  
...  
Keyword(s):  
Coral Reef ◽  
Nitrogen Deposition ◽  
21St Century ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

Anthropogenic Nitrogen Deposition Increases Soil Carbon by Enhancing New Carbon of the Soil Aggregate Formation

2019 ◽  
Vol 124 (3) ◽  
pp. 572-584 ◽  
Author(s):  
Ruiying Chang ◽  
Wenjun Zhou ◽  
Yunting Fang ◽  
Haijian Bing ◽  
Xiangyang Sun ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Nitrogen Deposition ◽  
Soil Aggregate ◽  
Aggregate Formation ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

scholarly journals Separating the influences of diagenesis, productivity and anthropogenic nitrogen deposition on sedimentary δ15N variations

2014 ◽  
Vol 75 ◽  
pp. 140-150 ◽  
Author(s):  
J. Brahney ◽  
A.P. Ballantyne ◽  
B.L. Turner ◽  
S.A. Spaulding ◽  
M. Otu ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

Anthropogenic nitrogen deposition alters growth responses of European beech (Fagus sylvativa L.) to climate change

2018 ◽  
Vol 233 ◽  
pp. 92-98 ◽  
Author(s):  
Carsten Hess ◽  
Thomas Niemeyer ◽  
Andreas Fichtner ◽  
Kirstin Jansen ◽  
Matthias Kunz ◽  
...  
Keyword(s):  
Climate Change ◽  
Nitrogen Deposition ◽  
European Beech ◽  
Growth Responses ◽  
Anthropogenic Nitrogen ◽  
Anthropogenic Nitrogen Deposition

scholarly journals Nitrogen Deposition on Danish Nature

Atmosphere ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 447 ◽  
Author(s):  
Thomas Ellermann ◽  
Jesper Nygaard ◽  
Jesper Christensen ◽  
Per Løfstrøm ◽  
Camilla Geels ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads ◽  
Temporal Trends ◽  
Monitoring Program ◽  
Terrestrial Ecosystems ◽  
Marine Waters ◽  
Model Calculations ◽  
Nitrogen Loads ◽  
Long Term Trends

Eutrophication events are frequent in Inner Danish waters and critical loads are exceeded for much of the Danish sensitive terrestrial ecosystems. The Danish air quality monitoring program combines measurements and model calculations to benefit from the complementarities in data from these two sources. Measurements describe actual status, seasonal variation, and temporal trends. Model calculations extrapolate the results to the entire country and determine depositions to specific ecosystems. Measurements in 2016 show annual depositions between 7.5 and 11 kg N/ha to terrestrial ecosystems, and a load to marine waters of 5.3 kg N/ha. The deposition on Danish marine waters in 2016 was calculated to be 73,000 tons N with an average deposition of 6.9 kg N/ha. For terrestrial areas, the deposition was calculated to be 57,000 tons N with an average deposition of 13 kg N/ha. This is above critical loads for sensitive ecosystems. Long-term trends show a 35% decrease since 1990 in measured annual nitrogen deposition. At two out of four stations in nature areas, measured ammonia levels exceeded critical levels for lichens and mosses. Conclusions: Nitrogen loads and levels to Danish nature is decreasing, but critical loads and levels are still exceeded for sensitive ecosystems. Combining measurements and model calculations is a strong tool in monitoring.

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