Habitat: Montane Habitats
Grid Reference: NO252859
Grid Easting: 325500 to the 1km mid point (metres)
Grid Northing: 785500 to the 1km mid point (metres)
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Pollutant: Ammonia
Critical Level:
1.0 - 3 µg m-3
Concentration: 0.32 µg m-3
Data Year: 2018 - 2020
Exceedance: [-0.68] to [-2.68] µg m-3
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Pollutant: N Deposition
Critical Load Range:
Arctic, alpine and subalpine scrub habitats: 5 - 15 Kg N/ha/year
Moss and lichen dominated mountain summits: 5 - 10 Kg N/ha/year
For applying the best indicative critical load values for use in impact assessments please visit the following page.
Deposition: 11.34 Kg N/ha/year
Data Year: 2018 - 2020
Exceedance Ranges:
Arctic, alpine and subalpine scrub habitats [6.34] to [-3.66] Kg N/ha/year
Moss and lichen dominated mountain summits [6.34] to [1.34] Kg N/ha/year
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Pollutant: Nitrogen Oxides
Critical Level: 30 µg NOx (as NO2) m-3
Concentration: 2.21 µg NOx (as NO2) m-3
Data Year: 2018 - 2020
Exceedance: -27.79 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: 900.42 ppb hours
Data Year: 2007 - 2012
Exceedance: -4099.58 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: Montane
CLmaxS: 0.43 CLminN: 0.321 CLmaxN: 0.751 (keq/ha/yr)
Deposition: 0.84 (N: 0.81 | S: 0.14) (keq/ha/yr)
Data Year: 2018 - 2020
Exceedance: