Habitat: Dwarf Shrub Heath
Grid Reference: NG945498
Grid Easting: 194500 to the 1km mid point (metres)
Grid Northing: 849500 to the 1km mid point (metres)
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Pollutant: Ammonia
Critical Level:
1.0 - 3 µg m-3
Concentration: 0.22 µg m-3
Data Year: 2018 - 2020
Exceedance: [-0.78] to [-2.78] µg m-3
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Pollutant: N Deposition
Critical Load Range:
Dry heaths: 10 - 20 Kg N/ha/year
Northern wet heath: Calluna-dominated wet heath (upland moorland): 10 - 20 Kg N/ha/year
Northern wet heath: Erica tetralix dominated wet heath: 10 - 20 Kg N/ha/year
For applying the best indicative critical load values for use in impact assessments please visit the following page.
Deposition: 8.44 Kg N/ha/year
Data Year: 2018 - 2020
Exceedance Ranges:
Dry heaths [-1.56] to [-11.56] Kg N/ha/year
Northern wet heath: Calluna-dominated wet heath (upland moorland) [-1.56] to [-11.56] Kg N/ha/year
Northern wet heath: Erica tetralix dominated wet heath [-1.56] to [-11.56] Kg N/ha/year
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Pollutant: Nitrogen Oxides
Critical Level: 30 µg NOx (as NO2) m-3
Concentration: 1.41 µg NOx (as NO2) m-3
Data Year: 2018 - 2020
Exceedance: -28.59 µg NOx (as NO2) m-3
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Pollutant: Ozone
Critical Level: 5000 ppb hours (based on(Semi-)natural vegetation communities dominated by perennials, 6 month growing season mid April- mid October)
Exposure: 768.37 ppb hours
Data Year: 2007 - 2012
Exceedance: -4231.63 ppb hours
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Pollutant: Sulphur Dioxide
Critical Level: 20 µg m-3
Concentration: 0.26 µg m-3
Data Year: 2018 - 2020
Exceedance: -19.74 µg m-3
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Pollutant: Acid Deposition
Critical Load Class & Values:
Class: Dwarf shrub heath
CLmaxS: 0.45 CLminN: 0.642 CLmaxN: 1.092 (keq/ha/yr)
Deposition: 0.58 (N: 0.6 | S: 0.17) (keq/ha/yr)
Data Year: 2018 - 2020
Exceedance: