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There is a formidable literature on the use of data and scenarios in VIA assessments, and this guidance does not seek to repeat earlier extensive reviews (e.g. see Carter et al., 2001; Carter et al., 2007; Mearns et al., 2001; Rounsevell and Metzger, 2010). In 1996 the IPCC formed TGICA, a special cross-Working Group committee charged with making relevant data and scenarios assessed by the IPCC accessible to the climate change research community worldwide. TGICA has prepared a number of guidance documents on data and scenarios (e.g. IPCC-TGICA, 2007; Nicholls et al., 2011), regional workshops have been arranged on the topic (e.g. Leary et al., 2009) and the IPCC Data Distribution Centre (http://www.ipcc-data.org/) was established to facilitate the timely distribution of consistent data and scenarios for use in VIA and mitigation assessments that can ultimately feed into the IPCC assessment process.

Aside from the DDC, many governments, national and international agencies are now investing heavily in the provision of data and scenario support for climate change research. Such provision of information is increasingly being referred to as "climate services", associated with an initiative launched in 2009 by the World Meteorological Organization (Global Framework for Climate Services, see: http://www.wmo.int/hlt-gfcs/).

Examples of portals offering data and information include:

  • Global: The World Bank Climate Change Data Portal (http://sdwebx.worldbank.org/climateportal/index.cfm) provides information on climate and impacts, an adaptation-screening tool and some limited coverage of mitigation.
  • Global (developing countries): UNDP Climate Change Country Profiles (http://country-profiles.geog.ox.ac.uk/), posted at the University of Oxford, UK, offer information on observed and projected climate for 52 developing countries.
  • Africa: Climate Information Portal (http://cip.csag.uct.ac.za/webclient/introduction) of the Climate Systems Analysis Group, University of Cape Town, provides climate information and scenarios for Africa, Asia and globally (in English)
  • Asia and the Pacific: Climate Change Adaptation in Asia and the Pacific (http://www.asiapacificadapt.net/) is a collaborative portal co-ordinated by the Adaptation Knowledge Forum and the Asia Pacific Adaptation Network, offering information to support climate change adaptation in the Asia and Pacific region (in English).
  • Europe: The European Climate Adaptation Platform, CLIMATE-ADAPT (http://climate-adapt.eea.europa.eu/), is a portal operating under the auspices of the European Environment Agency and offers links to European and national climate, impacts and adaptation information (in English).
  • Australia: OzClim (http://www.csiro.au/ozclim/home.do) is a tool for generating climate change scenarios for Australia (in English).
  • Canada: The public funded national Canadian Climate Change Scenarios Network (http://cccsn.ca/) offers a mapping tool for  providing climate projections; the Pacific Climate Impacts Consortium (http://www.pacificclimate.org/) is a regional climate services centre providing information on climate and impacts for the Pacific and Yukon regions; the private, non-profit consortium, Ouranus (http://www.ouranos.ca/en/), co-ordinates projects and information provision on regional climate and adaptation for Quebec and other regions of Canada (in English and French).
  • Caribbean: The Caribbean Community Climate Change Centre (http://www.caribbeanclimate.bz/) provides regional climate data and projections and information and advice on adaptation responses.
  • Central America: The SERVE (www.servir.net/cambio_climatico) project for Mesoamerica provides regional climate change
  • Denmark: Climate data and scenarios supplied by the Danish Meteorological Institute through the Climate Change Adaptation portal (http://www.klimatilpasning.dk/en-US/Sider/ClimateChangeAdaptation.aspx) (in Danish and English).
  • Finland: The national portal Climateguide.fi (http://climateguide.fi/), co-ordinated by the Finnish Meteorological Institute, Finnish Environment Institute and Aalto University provides data and information on climate, impacts, adaptation and mitigation (in Finnish, Swedish and English).
  • Germany: The Federal Environment Agency (Umweltbundesamt) web portal KomPass (Kompetenzzentrum, Klimafolgen und Anpassung) (http://www.anpassung.net/cln_115/nn_700712/DE/Home/) and the government-funded Climate Service Center – Germany (http://www.climate-service-center.de/) (in German with limited coverage in English).
  • Netherlands: Climate services, including climate scenarios, provided by the Royal Netherlands Meteorological Institute (KNMI) (http://www.knmi.nl/research/climate_services/) and accessible from the Dutch climate change portal Platform Communication on Climate Change (PCCC) (http://www.klimaatportaal.nl/pro1/general/home.asp) (in Dutch and English).
  • Norway: Climate scenarios provided by the Norwegian Meteorological Institute (http://senorge.no/) and accessible from the Norwegian Climate Change Adaptation Programme web portal hosted by the Norwegian Ministry of the Environment (http://www.regjeringen.no/en/dep/md/kampanjer/engelsk-forside-for-klimatilpasning.html?id=539980) (in Norwegian and English).
  • Spain: Climate scenarios prepared by the State Meteorological Agency of Spain  (http://www.aemet.es/es/elclima/cambio_climat/proyeccione) in support of the Spanish National Climate Change Adaptation Plan (in Spanish). 
  • United Kingdom: The UK Government has produced five sets of official climate projections since 1991, the most recent being UKCP09 (Murphy et al., 2009), and one set of socio-economic scenarios in 2001 (UKCIP, 2001). These are distributed by UKCIP (http://www.ukcip.org.uk/tools/) (in English). There have also been critical reviews of the effectiveness of both the climate scenarios (Hulme and Dessai, 2008)  and socio-economic scenarios (Hughes et al., 2009).
  • USA: Nationally NOAA has a prototype Climate Services Portal (http://www.climate.gov/) offering observed climate data; the Nature Conservancy offers climate information for the USA and world, available through a Climate Wizard (http://www.climatewizard.org/index.html); the Climate Impacts Group (http://www.climatewizard.org/index.html) is an example of a regional provider of climate information and projections for the Pacific Northwest (all in English).
  • Global: WorldClim (http://www.worldclim.org/) is a set of global climate layers (grids) with spatial resolution
    of approximately 1 square kilometre for mapping, spatial modelling and use in GIS
    (Hijmans et al, 2005 )


The following sub-sections describe a number of issues to consider in identifying data, developing scenarios and presenting such information for use in assessments, along with supporting literature offering additional explanation and examples.

Pathfinder

Related decision tree of the Pathfinder:

Decision tree: Impact analysis