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An Encyclopedia on Climate Change

Global warming is a complicated issue. It’s easy to get confused by all the scientific arguments and conflicting claims. We created this site to help everyone from high school students to scientists working in the field to quickly find the latest and most reliable information on this important topic.

ClimateWiki is an encyclopedia of climate change research organized by topic. If you are new to the issue, consider reading the Introduction to Global Warming. If you are already well versed in the issue, search the Featured Categories in the search box to the right or use some of the other navigation tools on this page.

ClimateWiki is moderated and edited by The Heartland Institute, a free-market think tank with offices in Chicago and Washington, DC. Interested in becoming a contributor? Contact us.

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Past 1,000 years in South America

Working with 22 climate proxies, Neukom et al. (2011) reconstructed a mean austral summer (December-February) temperature history for the period AD 900-1995 for the terrestrial area of the planet located between 20°S and 55°S and between 30°W and 80°W -- a region they call Southern South America (SSA). The international research team -- composed of scientists from Argentina, Chile, Germany, Switzerland, The Netherlands, the United Kingdom, and the United States -- write that their summer temperature reconstruction suggests that "a warm period extended in SSA from 900 (or even earlier) to the mid-fourteenth century," which coincided with the end of the Medieval Warm Period in the Northern Hemisphere. This warm period was about 0.17°C warmer than the peak warmth of the Current Warm Period, despite the far lower atmospheric CO2 content of the Medieval Warm Period. This indicates that the planet's current -- but not unprecedented -- degree of warmth need not be CO2-induced.

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Parasitic Infestation and Temperature Change

Sea ice

Forests

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List of Climate Change Websites