Query by Location - Results

Data Update 17/05/2022: The pollution concentration and deposition data in the Site Relevant Critical Load Tool has been updated to use the 3-year mean for the years 2018-20.

Habitat: Acid grassland

Grid Reference: SN824853

Grid Easting: 282500 to the 1km mid point (metres)

Grid Northing: 285500 to the 1km mid point (metres)

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Pollutant: Ammonia

Critical Level: 1.0 - 3 µg m-3

Concentration: 0.95 µg m-3

Data Year: 2018 - 2020

Exceedance: [-0.05] to [-2.05] 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: 19.18 Kg N/ha/year

Data Year: 2018 - 2020

Exceedance Ranges:
Alpine and subalpine grasslands [14.18] to [9.18] Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards [9.18] to [-0.82] Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows [4.18] to [-5.82] Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland [9.18] to [4.18] Kg N/ha/year
Alpine and subalpine grasslands [14.18] to [9.18] Kg N/ha/year
Moist and wet oligotrophic grasslands: Heath (Juncus) meadows and humid (Nardus stricta) swards [9.18] to [-0.82] Kg N/ha/year
Moist and wet oligotrophic grasslands: Molinia caerulea meadows [4.18] to [-5.82] Kg N/ha/year
Non-mediterranean dry acid and neutral closed grassland [9.18] to [4.18] Kg N/ha/year

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Pollutant: Nitrogen Oxides

Critical Level: 30 µg NOx (as NO2) m-3

Concentration: 3.53 µg NOx (as NO2) m-3

Data Year: 2018 - 2020

Exceedance: -26.47 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: 1208.04 ppb hours

Data Year: 2007 - 2012

Exceedance: -3791.96 ppb hours

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Pollutant: Sulphur Dioxide

Critical Level: 20 µg m-3

Concentration: 0.37 µg m-3

Data Year: 2018 - 2020

Exceedance: -19.63 µg m-3

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Pollutant: Acid Deposition

Critical Load Class & Values:
Class: Acid grassland
CLmaxS: 0.47 CLminN: 0.366 CLmaxN: 0.836 (keq/ha/yr)

Deposition: 1.4 (N: 1.37 | S: 0.21) (keq/ha/yr)

Data Year: 2018 - 2020

Exceedance: