Evidence of sulphur and nitrogen deposition signals at the United Kingdom Acid Waters Monitoring Network sites.

Some recent studies of trends in sulphate in surface waters have alluded to possible lag effects imposed by catchment soils, resulting in discrepancies between trends in deposition and run-off. To assess the extent of these possible effects in the UK, sulphate concentration data from the United Kingdom Acid Waters Monitoring Network (AWMN) sites are compared with estimates of sulphur deposition at each site. From these data, input-output budgets are computed at an annual time scale. The estimated budgets suggest a close association between catchment sulphur inputs and outputs at an annual scale, with well-balanced annual budgets at most sites, indicative of only minor lag effects. A similar analysis of the AWMN site nitrogen budget shows little evidence of an association between nitrogen inputs and outputs at this time scale.

[1]  P. Whitehead,et al.  Nitrous oxide emission from a range of land uses across Europe , 2002 .

[2]  M. Field,et al.  The meteorological office rainfall and evaporation calculation system -- MORECS , 1983 .

[3]  B. Cosby,et al.  Recovery from acidification of lochs in Galloway, south-west Scotland, UK: 1979-1998 , 2001 .

[4]  D. Monteith,et al.  The United Kingdom Acid Waters Monitoring Network: a review of the first 15 years and introduction to the special issue. , 2005, Environmental pollution.

[5]  Don Monteith,et al.  Chemical trends at lakes and streams in the UK Acid Waters Monitoring Network, 1988-2000: Evidence for recent recovery at a national scale , 2001 .

[6]  R. Wright,et al.  Trends in nitrogen deposition and leaching in acid-sensitive streams in Europe , 2001 .

[7]  J. Fölster,et al.  Recovery from acidification in Swedish forest streams. , 2002, Environmental pollution.

[8]  K. Somers,et al.  Coherent responses of sulphate concentration in Norwegian lakes: relationships with sulphur deposition and climate indices , 2003 .

[9]  K. E. Webster,et al.  Regional trends in aquatic recovery from acidification in North America and Europe , 1999, Nature.

[10]  T. Andersen,et al.  Recovery from acidification of lakes in Finland, Norway and Sweden 1990–1999 , 2001 .

[11]  R. Harriman,et al.  Interpretation of trends in acidic deposition and surface water chemistry in Scotland during the past three decades , 2001 .

[12]  A. Jenkins,et al.  Response of acid lakes in the UK to reductions in atmospheric deposition of sulfur. , 2003, The Science of the total environment.

[13]  R. Wright,et al.  Surface water acidification in the South Pennines I. Current status and spatial variability. , 2000, Environmental pollution.

[14]  Suzanne Couture,et al.  Assessing the Recovery of Lakes in Southeastern Canada from the Effects of Acidic Deposition , 2003 .

[15]  D. Fowler,et al.  Changes in the atmospheric deposition of acidifying compounds in the UK between 1986 and 2001. , 2005, Environmental pollution.

[16]  P. Dillon,et al.  The use of mass balance investigations in the study of the biogeochemical cycle of sulfur , 1997 .

[17]  R. Wright,et al.  Recovery from acidification in European surface waters , 2001 .

[18]  R. Ferrier,et al.  Modelling nitrogen dynamics at Lochnagar, N.E. Scotland. , 2001 .

[19]  Chris D. Evans,et al.  Response of sulphur dynamics in European catchments to decreasing sulphate deposition , 2001 .