Nitrogen Deposition, Critical Loads and Biodiversity: Introduction

2014 ◽  
pp. 1-4 ◽  
Author(s):  
W. Kevin Hicks ◽  
Richard Haeuber ◽  
Mark A. Sutton
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads

Choice of control of sulfur and/or nitrogen deposition based on critical loads

2010 ◽  
Vol 55 (6) ◽  
pp. 493-498 ◽  
Author(s):  
YiHua Zhang ◽  
ShaoDong Xie
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads

Critical loads for nitrogen deposition and their exceedance at European scale

1998 ◽  
pp. 591-598 ◽  
Author(s):  
J.C.I. Kuylenstierna ◽  
W.K. Hicks ◽  
S. Cinderby ◽  
H. Cambridge
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads

Critical loads for nitrogen deposition and their exceedance at European scale

1998 ◽  
Vol 102 (1) ◽  
pp. 591-598 ◽  
Author(s):  
J.C.I. Kuylenstierna ◽  
W.K. Hicks ◽  
S. Cinderby ◽  
H. Cambridge
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads

scholarly journals Short-term effects of nitrogen deposition on soil microbial biomass in Calluna heathlands NW Spain: critical loads

2014 ◽  
Vol 21 ◽  
pp. 65
Author(s):  
Javier Calvo-Fernández ◽  
Elena Marcos ◽  
Leonor Calvo
Keyword(s):  
Microbial Biomass ◽  
Nitrogen Deposition ◽  
Critical Loads ◽  
Soil Microbial Biomass ◽  
Nw Spain ◽  
Short Term ◽  
Soil Microbial ◽  
Short Term Effects

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.

Nitrogen Deposition in the UK: The Influence of Grid-Space and Time on the Exceedance of Critical Loads and Levels

2011 ◽  
pp. 669-673
Author(s):  
Anthony James Dore ◽  
Małgorzata Werner ◽  
Stephen Hallsworth ◽  
Jane Hall ◽  
Christopher Dore ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads ◽  
Space And Time ◽  
The Uk

Ecological ranges for the pH and NO3 of syntaxa: a new basis for the estimation of critical loads for acid and nitrogen deposition

2011 ◽  
Vol 22 (4) ◽  
pp. 741-749 ◽  
Author(s):  
G.W.W. Wamelink ◽  
P.W. Goedhart ◽  
A.H. Malinowska ◽  
J.Y. Frissel ◽  
R.J.M. Wegman ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads

scholarly journals Quantification of nitrate leaching from forest soils on a national scale in The Netherlands

2004 ◽  
Vol 8 (4) ◽  
pp. 813-822 ◽  
Author(s):  
J. Kros ◽  
A. Tietema ◽  
J. P. Mol-Dijkstra ◽  
W. de Vries
Keyword(s):  
Steady State ◽  
Regression Model ◽  
Nitrogen Deposition ◽  
Dynamic Model ◽  
Critical Loads ◽  
Forest Ecosystems ◽  
Dynamic Models ◽  
National Scale ◽  
Regional Variability ◽  
Nitrate Concentrations

Abstract. To evaluate the effects of nitrogen (N) emission policies, reliable information on nitrate concentrations and leaching fluxes from forest ecosystems is necessary. Insight into the regional variability of nitrate concentrations, to support local policy on emission abatement strategies is especially desirable. In this paper, three methods for the calculation of a spatial distribution of soil nitrate concentrations in Dutch forest ecosystems are compared. These are (i) a regression model based on observed nitrate concentrations and additional data on explanatory variables such as soil type, tree species and nitrogen deposition (ii) a semi-empirical dynamic model WANDA, and (iii) a process-oriented dynamic model SMART2. These two dynamic models are frequently used to evaluate the effects of reductions in nitrogen deposition at scales ranging from regional to countrywide. The results of the regression model evaluated the performance of the two dynamic models. Furthermore, the results of the three methods are compared with the steady-state approach currently used for the derivation of nitrogen critical loads. Both dynamic models, in the form of cumulative distribution functions, give similar results on a national scale. Regional variability is predicted differently by both models. Discrepancies are caused mainly by a difference in handling forest filtering and denitrification. All three methods show that, despite the high nitrogen inputs, Dutch forests still accumulate more N than they release. This implies that, in respect of groundwater quality, presently acceptable nitrogen deposition is higher than the (long-term) critical loads. However, in areas with high atmospheric nitrogen input, all three methods indicate that the EU standard for nitrate in groundwater (50 mg NO3 l–1) is exceeded. Steady-state with nitrogen deposition seems to have been reached in about 10% of the forested area, with a nitrate concentration greater than 50 mg NO3–1. Keywords: soil modelling, up-scaling, model validation, critical load

Mapping critical loads of nitrogen deposition for aquatic ecosystems in the Rocky Mountains, USA

2012 ◽  
Vol 166 ◽  
pp. 125-135 ◽  
Author(s):  
Leora Nanus ◽  
David W. Clow ◽  
Jasmine E. Saros ◽  
Verlin C. Stephens ◽  
Donald H. Campbell
Keyword(s):  
Nitrogen Deposition ◽  
Rocky Mountains ◽  
Critical Loads ◽  
Aquatic Ecosystems

Critical loads for nitrogen deposition on forest ecosystems

1989 ◽  
Vol 48 (3-4) ◽  
pp. 451-456 ◽  
Author(s):  
E. - D. Schulze ◽  
W. De Vries ◽  
M. Hauhs ◽  
K. Rosén ◽  
L. Rasmussen ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Critical Loads ◽  
Forest Ecosystems
Sign in / Sign up

Export Citation Format

Share Document