The relationship between temperature, CO2, and solar activity.
The geographic distribution of surface warming during the 21st century calculated by the HadCM3 climate model if a business as usual scenario is assumed for economic growth and greenhouse gas emissions. In this figure, the globally averaged warming corresponds to 3.0 °C (5.4 °F).
Sparse records indicate that glaciers have been retreating since the early 1800s. In the 1950s measurements began that allow the monitoring of glacial mass balance, reported to the WGMS and the NSIDC.
Image of the largest Antarctic ozone hole ever recorded (September 2006).
Lowest value of ozone measured by Total Ozone Mapping SpectrometerTOMS
Ozone hole in North America during 1984 (abnormally warm reducing ozone depletion) and 1997 (abnormally cold resulting in increased seasonal depletion). Source: NASA,http://earthobservatory.nasa.gov/IOTD/view.php?id=1771
NASA projections of stratospheric ozone concentrations if chlorofluorocarbons had not been banned.
Posición de los diversos países en 2009 respecto del Protocolo de Kioto. Firmado y ratificado. Firmado pero con ratificación pendiente. Firmado pero con ratificación rechazada. No posicionado.
The reconstructed depth of the Little Ice Age varies between different studies (anomalies shown are from the 1950-80 reference period). *