Habitat: Acid grassland
Grid Reference: IH640885
Grid Easting: 79500 to the 1km mid point (metres)
Grid Northing: 550500 to the 1km mid point (metres)
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Pollutant: Ammonia
Critical Level:
1.0 - 3 µg m-3
Concentration: 1.6 µg m-3
Data Year: 2018 - 2020
Exceedance: [0.6] to [-1.4] µg m-3
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Pollutant: N Deposition
Critical Load Range:
Alpine and subalpine grasslands: 5 - 10 Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards: 10 - 20 Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows: 15 - 25 Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland: 10 - 15 Kg N/ha/year
Alpine and subalpine grasslands: 5 - 10 Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards: 10 - 20 Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows: 15 - 25 Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland: 10 - 15 Kg N/ha/year
For applying the best indicative critical load values for use in impact assessments please visit the following page.
Deposition: 18.8 Kg N/ha/year
Data Year: 2018 - 2020
Exceedance Ranges:
Alpine and subalpine grasslands [13.8] to [8.8] Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards [8.8] to [-1.2] Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows [3.8] to [-6.2] Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland [8.8] to [3.8] Kg N/ha/year
Alpine and subalpine grasslands [13.8] to [8.8] Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards [8.8] to [-1.2] Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows [3.8] to [-6.2] Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland [8.8] to [3.8] Kg N/ha/year
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Pollutant: Nitrogen Oxides
Critical Level: 30 µg NOx (as NO2) m-3
Concentration: 3.5 µg NOx (as NO2) m-3
Data Year: 2018 - 2020
Exceedance: -26.5 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: 562.5 ppb hours
Data Year: 2007 - 2012
Exceedance: -4437.5 ppb hours
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Pollutant: Sulphur Dioxide
Critical Level: 20 µg m-3
Concentration: 0.34 µg m-3
Data Year: 2018 - 2020
Exceedance: -19.66 µg m-3
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Pollutant: Acid Deposition
Critical Load Class & Values:
Class: Acid grassland
CLmaxS: 0.592 CLminN: 0.367 CLmaxN: 0.959 (keq/ha/yr)
Deposition: 1.33 (N: 1.34 | S: 0.14) (keq/ha/yr)
Data Year: 2018 - 2020
Exceedance: