Do you think we’ve got any evidence for climate change? Well, of course we have! Hum, evidences for climate change are taken for a variety of sources that can be used to reconstruct climate. Most of these evidences are indirect and climate changes are inferred form changes in indicators that reflect climate, such as vegetation, ice cores, dendrochronology, glacial geology, sea level change or mosquitoes.

Any change in the climate can produce a change in the type, distribution and coverage of vegetation. In any given scenario a wild change in the climate may result in increased precipitation and warmth, resulting in improved plant growth and the subsequent sequestration of airborne CO2. More radical changes, however, may result can result in vegetation stress, plants loss or, in certain circumstances, desertification.

Analysis of ice cores drilled from a permafrost area, as the Antarctic, can show a link between the temperature and the global sea level variation. The air trapped in bubbles can show the variation of the carbon dioxide of the atmosphere from the distant past. The study of this ice cores has been a significant indicator of the changes in CO2 and provides important information to show the differences between ancient and modern atmospheric conditions. Here you can see the link between temperature and the CO2 concentration.

Dendrochronology is the analysis of the tree ring patterns to determine the age of a tree. It can also determine the climatic conditions for a given number of years. Wide and thick rings determine fertile and well-watered growing conditions, while narrow and thin rings determine less than ideal conditions and a time of lower rainfall.

Glaciers are the most sensitive indicators of climate change, advancing during time cooling and retreating during climate warming on moderate time scales. Glaciers grow and shrink; both contributing to natural variability and amplifying externally forced changes. And now, if you’ve got any question, we’ll try to answer it.