• WDCGG: http://www.wmo.int/pages/prog/arep/gaw/reactive_gases.html (one-stop shop for greenhouse gas data)
• ACCENT Metadatabase: http://www.accent-network.org/farcry_accent/metadatabase/index.cfm?fuseaction=view.workpackages
• NABEL data online: http://www.bafu.admin.ch/luft/index.html?lang=en
• CDIAC (Carbon Dioxide Information Analysis Center), World Data Centers: http://cdiac.esd.ornl.gov/wdca/wdcinfo.html
• EMEP Webdab: http://www.ceip.at/emission-data-webdab/
• British Atmospheric Data Centre: http://badc.nerc.ac.uk/home/index.html
• EDGAR: http://www.mnp.nl/edgar/
• GAWSIS: http://gaw.empa.ch/gawsis/
• Chemical Kinetic Database on oxygenated VOCs gas-phase reactions: http://www.era-orleans.org/eradb/

• EMEP emission inventory: http://www.ceip.at/emission-data-webdab/ (European emission inventory)
• GEIA: http://geiacenter.org/(Global emission inventory)
• AFEAS (Alternative Fluorocarbons Environmental Acceptability Study): http://www.afeas.org/

• Web Fire Mapper: http://maps.geog.umd.edu/
• soil moisture maps: http://desert.jrc.ec.europa.eu/action/php/index.php?action=view&id=19
• Sahara Dust Forecasts, University of Athens: http://forecast.uoa.gr/dustindx.php
• FLEXTRA Trajectories: http://tarantula.nilu.no/trajectories/index.cfm
• GSE-Promote (PROtocol MOniToring for the GMES Service Element: Atmosphere): http://www.gse-promote.org/

Networks

• AGAGE: http://agage.eas.gatech.edu/ (Advanced Global Atmospheric Gases Experiment – Global observations of non-CO2 trace gases)
• NOAA/GMD: http://www.cmdl.noaa.gov/ (Global observations of non-CO2 trace gases)
  

Stations

• Jungfraujoch (Switzerland) http://www.ifjungo.ch/
• Monte Cimone (Italy) http://www.isac.cnr.it/cimone/
• Ny Alesund (Spitsbergen, Norway) http://www.nilu.no/zeppelin/
• Mace Head (Ireland) http://macehead.nuigalway.ie/mace1.html
• Cape Grim (Tasmania, Austraila) http://www.csiro.au/places/Cape-Grim.html
  

• Hy-Care: http://www.fz-juelich.de/hycare
• EUROHYDROS: http://www.meteor.uni-frankfurt.de/eurohydros/ (European Network for Atmospheric Hydrogen observations and studies)
• HyWeb: http://www.netinform.net/h2/Aktuelles.aspx

• http://tarantula.nilu.no/projects/ccc/emepdata.html

• University of Bristol: http://www.chm.bris.ac.uk/acrg/ (The Atmospheric Chemistry Research Group at the University of Bristol – Friends)
• PSI-LAC:  http://lac.web.psi.ch/ (Laboratory of Atmospheric Chemistry)
• IACETH: http://www.iac.ethz.ch/ (Institute for Atmospheric and Climate Science at ETH)
• NILU: http://www.nilu.no/index.cfm?lan_id=3 (Nowegian Institute for Air Research)

• ACCENT: http://www.accent-network.org/ (Atmospheric Composition Change – The  European Network)
• SOGE: http://tarantula.nilu.no/soge/ (European Network for Observation of Atmospheric  Halocarbons)
• EUROHDYROS: http://www.meteor.uni-frankfurt.de/eurohydros/ (European Network for Atmospheric Hydrogen observations and studies)
• ACTRIS: http://www.actris.net/Project/WorkPackages/WP4/tabid/4428/Default.aspx (Work package 4. Trace gases networking: Volatile organic carbon and nitrogen oxides)

• FOEN: http://www.bafu.admin.ch/index.html?lang=en (Swiss Federal Office for the Environment)
• MeteoSwiss: http://www.meteoschweiz.ch/web/en/weather.html (Federal Office of Meteorology and Climatology)
• WMO: http://www.wmo.ch/index-en.html (World Meteorological Organization)
• UNEP ozone secretary: http://ozone.unep.org/ (Overview on the stratospheric ozone decline and the Montreal Protocol and its amendments)
• IPCC: http://www.ipcc.ch/ (The science of greenhouse warming )
• UNFCCC: http://unfccc.int/ (Kyoto Protocol and related activities)