Quantification of changes in lakewater chemistry in response to acidic deposition

Nature ◽  
1990 ◽  
Vol 345 (6270) ◽  
pp. 54-58 ◽  
Author(s):  
T. J. Sullivan ◽  
D. F. Charles ◽  
J. P. Smol ◽  
B. F. Cumming ◽  
A. R. Selle ◽  
...  
Keyword(s):  
Acidic Deposition ◽  
Lakewater Chemistry

scholarly journals Modelling regional response of lakewater chemistry to changes in acidic deposition: the MAGIC model applied to lake surveys in southernmost Norway 1974-1986-1995

1998 ◽  
Vol 2 (4) ◽  
pp. 563-576 ◽  
Author(s):  
B. J. Cosby ◽  
R. F. Wright
Keyword(s):  
Monte Carlo ◽  
Acidic Deposition ◽  
Acid Neutralizing Capacity ◽  
Specific Method ◽  
Site Specific ◽  
Magic Model ◽  
Regional Responses ◽  
The Mean ◽  
Lakewater Chemistry ◽  
Modelling Approaches

Abstract. Two methods for modelling regional responses of lake water quality to changes in acidic deposition in southernmost Norway were examined. Both methods are based upon the MAGIC model but differ in mode of regional application; one uses site-specific while the other uses Monte-Carlo methods for model calibration. The simulations of regional responses from both methods were compared with observed responses based on data from three lake surveys in southernmost Norway conducted in 1974, 1986 and 1995. The regional responses of the two modelling approaches were quite similar and agreed well with the observed regional distributions of lakewater chemistry variables. From 1974 to 1986 the observed data indicated that despite a decline of approximately 10% in sulphate (SO4) deposition, the mean acid neutralizing capacity (ANC) of lakes in southernmost Norway declined by approximately 6 μeq l-1. Both modelling approaches simulated no change or a very small decline in mean ANC for that period. From 1986 to 1995 the observed data indicated that, in response to an approximate 40% decline in SO4 deposition, the mean ANC of lakes in southernmost Norway increased by 11-16 μeq l-1. The modelling approaches simulated increases of 9-10 μeq l-1 in mean ANC for the same period. Both simulations and observations indicate that > 65% of lakes in southernmost Norway were acidic in 1974 and 1995. Both simulation methods predict that >65% of the lakes in southernmost Norway will have positive ANC values within 10 years of reductions of SO4 deposition to 20% of 1974 levels. Of the two regionalization methods the site-specific method appears preferable, because whereas the Monte-Carlo method gives results for a region as a whole, the site-specific method also reveals patterns within the region. The maintenance of a one-to-one correspondence between simulated and observed systems means that simulation results can be mapped for a geographically explicit presentation of model results. The ability to examine geographic patterns of response is becoming increasingly important in regional assessments.

MONITORING FOREST SOILS OVER TIME TO UNDERSTAND ACIDIC DEPOSITION EFFECTS AND RECOVERY

2018 ◽  
Author(s):  
Gregory B. Lawrence ◽  
◽  
Paul W. Hazlett ◽  
Ivan J. Fernandez ◽  
Rock Ouimet ◽  
...  
Keyword(s):  
Forest Soils ◽  
Acidic Deposition ◽  
Over Time

Assessing the Chemical and Biological Resilience of Lakes in the Cascade Range to Acidic Deposition

2016 ◽  
Vol 227 (12) ◽  
Author(s):  
Joseph Eilers ◽  
Kellie Vache ◽  
Benn Eilers ◽  
Roger Sweets ◽  
Jack Cornett
Keyword(s):  
Acidic Deposition ◽  
Cascade Range

scholarly journals Acidic Deposition in the Northeastern United States: Sources and Inputs, Ecosystem Effects, and Management Strategies

BioScience ◽  
2001 ◽  
Vol 51 (3) ◽  
pp. 180 ◽  
Author(s):  
CHARLES T. DRISCOLL ◽  
GREGORY B. LAWRENCE ◽  
ARTHUR J. BULGER ◽  
THOMAS J. BUTLER ◽  
CHRISTOPHER S. CRONAN ◽  
...  
Keyword(s):  
United States ◽  
Acidic Deposition ◽  
Management Strategies ◽  
Northeastern United States ◽  
Ecosystem Effects

scholarly journals Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils

2004 ◽  
Vol 76 (1) ◽  
pp. 139-145 ◽  
Author(s):  
Adolpho J. Melfi ◽  
Celia R. Montes ◽  
Adilson Carvalho ◽  
Maria Cristina Forti
Keyword(s):  
Spatial Distribution ◽  
Clay Minerals ◽  
Acidic Deposition ◽  
Clay Fraction ◽  
Terrestrial Ecosystem ◽  
Environmental Studies ◽  
Saline Soils ◽  
Variable Amount ◽  
Brazilian Soils ◽  
Soil Distribution

The pedogeochemical maps present the spatial distribution of soils according to crystalochemical parameters (clay fraction) and physic-chemical aspects of the sorting complex (CEC and BS). These maps are adequate tool for environmental studies and particularly, for the analysis of the terrestrial ecosystem sensibility to acidic deposition. The pedogeochemical maps of the Brazilian soils, elaborated using FAO SoilWorld Map, allowed establishing the soil distribution according to 5 classes of vulnerability to acidic deposition, as defined by Stockholm Environmental Institute (SEI). From these maps, it is observed that about 50% of the Brazilian soils are high vulnerable to acidic deposition and can be included within the most sensitive class. This group is formed by well-developed and mature soils, constituted by clay minerals of kaolinite type associated with variable amount of gibbsite. About 8% of the soils can be considered as the least sensitive class. They correspond to Topomorphic Vertisols (Vertissolo, Embrapa 1999), Planosols (Planossolo, Embrapa 1999) and saline soils. Finally, the remaining soils represent the balanced media that dominate the northeastern semiarid zones and the south and northeastern subtropical zones.

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