Simulations using the CCSM3 comprehensive AOGCM: Mechanisms of abrupt climate change and natural variability during the last centuries ...

• Main Author: Renold, Manuel
• Format: Thesis
• Language: unknown
• Published: :unas 2007
• Subjects: 530 Physics; Greenland; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.48350/192513; https://boris.unibe.ch/192513/

Proxy evidence from many tracers such as ice cores in Greenland and Antarctica reveal that the earth’s climate has changed several times in the past. The last 700,000 years are punctuated by transitions between glacial and interglacial periods. Different periods have been detected and linked to changes in the earth’s orbit, eccentricity, axial tilt, and precession. The last of such a cycle ended approximately ten thousand years ago. The global climate moved from a glacial to a much warmer climate. Since then, the climate has been in a remarkably stable state. Throughout the entire Holocene only small fluctuations of the climate such as the Little Ice Age, the Medieval Warm Period or the 8.2 ka event are known. To assess the predictability of future climate changes it is of crucial importance to have a profound knowledge of past climate history and the mechanisms controlling these changes naturally. The climate changes of the past leave their traces in many proxies, such as marine and lake sediments, corals, ...