Latest News

October 2007: Final Report on Critical Loads and Dynamic Modelling  Added

• This report available on the Contract Reports page

March 2007: Environment Agency Report Added

• A new report from the Environment Agency 'Uncertainty in critical load assessment models. Scientific Report: SC030172/SR' has been published and added to the list of Reports under the page 'Reading'.

January 2007: Exceedance maps added

• Maps showing exceedance of critical loads in individual habitats using the 2002-04 deposition data have been added and are available as a PDF from Maps, along with the 1 km 5th percentile critical load exceedance maps for terrestrial habitats.

September 2006: New pages added

• Information on Site-specific Critical Loads and Uncertainties have been added to the site. These are available from the Public Menu.

August 2006: Website update

November 2005

• Review of model chains for assessing impacts of Nitrogen on biodiversity, soils and water here

August 2005

• Critical load and exceedance maps, available for download here. Saves you cutting them out of the reports...

November 2004: User survey

• Have your say on this website. Click here for details. 

March 2004 update: UK Critical Loads

• March 2004 update to UK Critical Loads - Download Report (updated April 23rd 2004). Download Figures Adobe .pdf files)
• Addendum to the March 2004 Report: Critical Load Exceedances - Download Report and Download Figures (both Adobe .pdf files).

February 2004 Critical Loads data

• The February 2004 UK critical loads data are now available. The national data sets are available free of charge, under a standard CEH data licence agreement, in Ascii or Arc/Info GIS grid export (.e00) formats. A charge may be made for data required in different formats or for specific regions of the country.

  If you are interested in obtaining the data please email: critloads@ceh.ac.uk

  For further information on the 2004 critical loads data please refer to the 2004 Update on the Status of UK Critical Loads.

Ongoing: Key activities of the UK NFC at CEH Monks Wood:

• Running the UK NFC for critical loads modelling and mapping activities.

• Co-ordinating UK critical loads activities.

• Providing advice, data and maps to DEFRA and the devolved administrations.

• Actively participating in workshops and meetings under the UNECE Convention on Long-Range Transboundary Air Pollution.

• Collaborating with other UK experts in the further development of steady-state critical loads.

• Maintaining and updating national critical loads databases.

• Assessing the impacts of current and future deposition scenarios in terms of critical loads exceedance and the areas of ecosystems exceeded.

• Undertaking a formal assessment of uncertainties in critical loads and exceedance calculations.

• Maintaining and updating the UK NFC web site.