File:Fluctuations in temperature and in the atmospheric concentration of carbon dioxide over the past 649,000 years.gif
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Fluctuations_in_temperature_and_in_the_atmospheric_concentration_of_carbon_dioxide_over_the_past_649,000_years.gif (680 × 320 pixel, dimensione del file: 20 KB, tipo MIME: image/gif)
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| Descrizione |
English: This graph shows fluctuations in temperature and atmospheric concentration of carbon dioxide over the past 649,000 years. Temperature changes for Vostok in Antarctica are shown as a red line. Antarctic temperature is plotted from 421,000 BC to 2000 AD. Temperature is measured as the change from average conditions for the period 1850 AD to 2000 AD. The atmospheric concentration of carbon dioxide measured in Antarctica is shown on the graph as a yellow shaded area. Carbon dioxide concentrations from Antarctica are plotted from 647,000 BC to 1975 AD. A red vertical bar is shown towards the right hand side of the graph. This indicates the recent rise in the atmospheric concentration of carbon dioxide over the past two centuries, measured at Mauna Loa on the island of Hawaii. Carbon dioxide concentrations from Mauna Loa are plotted from 1958 AD to 2006 AD. The graph shows that during at least the last 650,000 years, carbon dioxide levels have tended to track the glacial cycles. During warm interglacial periods, carbon dioxide levels have been high, and during cool periods, carbon dioxide levels have been low. |
| Data | |
| Fonte | "Figure 1: Changes in Carbon Dioxide and Temperature," U.S. Environmental Protection Agency website: http://www.epa.gov/climatechange/science/pastcc.html |
| Autore | Environmental Protection Agency. Headquarters: Washington, D.C., U.S.A. |
| Licenza (Riusare questo file) |
"Information and graphics produced by U.S. federal agencies such as EPA are typically considered to be in the public domain. This material can therefore be used and reproduced without having to obtain permission." http://www.epa.gov/climatechange/kids/resources/tips.html |
Licenza
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Quest'immagine (o altro file multimediale) è un lavoro di un dipendente dell'Agenzia Statunitense per la Protezione dell'Ambiente, creato durante il suo servizio. Come lavoro del Governo federale degli Stati Uniti, tutte le immagini prodotte dall'EPA sono in pubblico dominio.
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| Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
|---|---|---|---|---|---|
| attuale | 07:01, 18 giu 2011 | | 680 × 320 (20 KB) | Enescot | {{Information |Description ={{en|1=This graph shows fluctuations in temperature and atmospheric concentration of carbon dioxide over the past 649,000 years. Temperature changes for Vostok in Antarctica are shown as a red line. Antarctic temperature is |
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