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Assessing the impacts of international emissions reduction scenarioson the acidification of freshwaters in Great Britain with the First-order Acidity Balance (FAB) model and the Hull Acid Rain Model (HARM)

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Title: Assessing the impacts of international emissions reduction scenarioson the acidification of freshwaters in Great Britain with the First-order Acidity Balance (FAB) model and the Hull Acid Rain Model (HARM)
Authors: Allott, Tim, Metcalfe, Sarah, Curtis, Chris, Harriman, Ron, Whyatt, Duncan
Source: Energy & Environment. 1999, Vol. 10 Issue 6, p571. 0p.
Subject Terms: *Modeling (Sculpture), *Fresh water, *Acidification
Geographic Terms: United Kingdom
Abstract: Critical loads models for acidity underpin international negotiations for the reduction of acid deposition through emissions controls. InGreat Britain and Scandinavia, critical loads for freshwater ecosystems are calculated with the First-order Acidity Balance (FAB) model, which can provide a catchment based estimate of deposition reduction requirements of sulphur and nitrogen species in order to protect any aquatic target organism for which a critical chemical threshold is defined. The FAB model is applied to a national freshwaters database for Great Britain using three deposition scenarios generated with the Hull Acid Rain Model (HARM). Critical load exceedance and changes in three important chemical indicators (non-marine sulphate, nitrate and acid neutralising capacity) are assessed for 1990 baseline depositionlevels, planned emissions reductions under existing international commitments (REF scenario), and a potential stringent emission reduction scenario under a multi-pollutant, multi-effect strategy (E10 scenario). Model outputs indicate that the number of sampled sites exceeding their critical load would be reduced by 60% and 73% respectively under the two future deposition scenarios. There is a clear need for a strategy to reduce both S and N deposition from 1990 levels if British freshwaters in sensitive areas are to be protected. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 8438096
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Assessing the impacts of international emissions reduction scenarioson the acidification of freshwaters in Great Britain with the First-order Acidity Balance (FAB) model and the Hull Acid Rain Model (HARM)
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  Data: <searchLink fieldCode="AR" term="%22Allott%2C+Tim%22">Allott, Tim</searchLink><br /><searchLink fieldCode="AR" term="%22Metcalfe%2C+Sarah%22">Metcalfe, Sarah</searchLink><br /><searchLink fieldCode="AR" term="%22Curtis%2C+Chris%22">Curtis, Chris</searchLink><br /><searchLink fieldCode="AR" term="%22Harriman%2C+Ron%22">Harriman, Ron</searchLink><br /><searchLink fieldCode="AR" term="%22Whyatt%2C+Duncan%22">Whyatt, Duncan</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Energy+%26+Environment%22">Energy & Environment</searchLink>. 1999, Vol. 10 Issue 6, p571. 0p.
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  Data: *<searchLink fieldCode="DE" term="%22Modeling+%28Sculpture%29%22">Modeling (Sculpture)</searchLink><br />*<searchLink fieldCode="DE" term="%22Fresh+water%22">Fresh water</searchLink><br />*<searchLink fieldCode="DE" term="%22Acidification%22">Acidification</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22United+Kingdom%22">United Kingdom</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Critical loads models for acidity underpin international negotiations for the reduction of acid deposition through emissions controls. InGreat Britain and Scandinavia, critical loads for freshwater ecosystems are calculated with the First-order Acidity Balance (FAB) model, which can provide a catchment based estimate of deposition reduction requirements of sulphur and nitrogen species in order to protect any aquatic target organism for which a critical chemical threshold is defined. The FAB model is applied to a national freshwaters database for Great Britain using three deposition scenarios generated with the Hull Acid Rain Model (HARM). Critical load exceedance and changes in three important chemical indicators (non-marine sulphate, nitrate and acid neutralising capacity) are assessed for 1990 baseline depositionlevels, planned emissions reductions under existing international commitments (REF scenario), and a potential stringent emission reduction scenario under a multi-pollutant, multi-effect strategy (E10 scenario). Model outputs indicate that the number of sampled sites exceeding their critical load would be reduced by 60% and 73% respectively under the two future deposition scenarios. There is a clear need for a strategy to reduce both S and N deposition from 1990 levels if British freshwaters in sensitive areas are to be protected. [ABSTRACT FROM AUTHOR]
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      – Code: eng
        Text: English
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        StartPage: 571
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      – SubjectFull: Modeling (Sculpture)
        Type: general
      – SubjectFull: Fresh water
        Type: general
      – SubjectFull: Acidification
        Type: general
      – SubjectFull: United Kingdom
        Type: general
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      – TitleFull: Assessing the impacts of international emissions reduction scenarioson the acidification of freshwaters in Great Britain with the First-order Acidity Balance (FAB) model and the Hull Acid Rain Model (HARM)
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            NameFull: Allott, Tim
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            NameFull: Metcalfe, Sarah
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            NameFull: Curtis, Chris
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            NameFull: Harriman, Ron
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            – D: 01
              M: 06
              Text: 1999
              Type: published
              Y: 1999
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              Value: 10
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