Ice ages and astronomical causes: data, spectral analysis and mechanisms
151
Citation
0
Reference
10
Related Paper
Citation Trend
Abstract:
Introduction.- The prevailing paradigm.- Details of the data and their interpretation.- Astronomical effects.- Time scale determination - a critical problem.- Tuning.- Spectral Methods: the minimum you must know.- Spectral analysis of data.- The 23 kyr cycle - does it exist?- Linking mechanisms to climate.- Critical tests of theory.- Summary: Status of our understanding. AppendicesKeywords:
Ice age
The last great (Wisconsin) ice age has long held the interest of climatologists, geologists, and geographers as the best documented of the several ice ages of the last million years. Although local glaciation maximums varied by several thousand years, the time 18,000 B.P. (years before present) is globally representative of this event. The changes of flora and fauna that accompanied this ice age are recorded in an extensive paleoclimatic literature, and are supplemented by widespread evidence of changes in the physical character of the earth's surface, such as changes in sea level, sea-ice extent, and local orography. From these and other evidence, estimates of the local nature of the ice-age climate itself have been derived at selected sites in terms of such variables as the local wind, temperature, or rainfall. Although they are insufficient to portray the overall global climatic regime, these estimates indicate that the ice-age climate was substantially different from today's in many regions of the world.
Ice age
Paleoclimatology
Cite
Citations (4)
Abstract What turns ice ages on and off? ‘The Ice Age cometh’ considers the potential impact global warming may have on the arrival of the next expected Ice Age. Will global warming fend it off or will it accelerate the onset of the next big freeze? Conditions on Earth during the great freezes of the Cryogenian and the most recent Quaternary ice ages are described and what triggers them considered, including the Croll–Milankovitch astronomical theory. The Little Ice Age (c.ad 1450–1850) and the Medieval Warm Period (c.ad 1000–1300) are discussed along with the role ocean circulation (especially the Atlantic Meridional Overturning Circulation) has to play.
Ice age
Milankovitch cycles
Little ice age
Cite
Citations (0)
Acknowledgements Chapter 1. Introduction 2. Ocean Sediments and Ice Cores 3. Ice Age Palaeoclimates and Computer Simulations 4. Glaciation History from the Last Interglacial to the Last Glacial Maximum 5. The Melting of the Last Great Ice Sheets 6. Ice Age Periglacial Environments 7. Lakes, Bogs and Mines 8. Rivers 9. Ice Age Aeolian Activity 10. Late Quarternary Volcanic Activity 11. Crustal and Sub-Crustal Effects 12. Late Quarternary Sea Level changes 13. Milankovitch Cycles and Late Quarternary Climate Change
Ice age
Milankovitch cycles
Ice core
Quaternary science
Cite
Citations (165)
Ice age
Epoch (astronomy)
Wisconsin glaciation
Ice core
Cite
Citations (4)
Natural disasters in Little Ice Age (c. 1550-1850) and its climatic variations which formed a significant background for the disasters are mentioned. Cool summers due to a prevailing Okhotsk High were characteristic of this period. Cold winters, summer heavy rains and unstable atmospheric conditions also constituted essential features of Little Ice Age. Aerosol ejected by a series of major volcanic eruptions partly prevented solar radiation from reaching the earth' s surface (parasol effect), which resulted in cool and unusual weather. Agriculture, in particular, was vulnerable to bad weather damage. As a result of decreasing direct insolation, sometimes together with lowering temperature and/or locally increasing precipitation, seven major famines occurred during the Edo Era (1663-1868) which approximately coincided with Little Ice Age. Several cases in this paper suggest that natural environment in Little Ice Age was marked by both volcanism and weakened solar activities which “Maunder Minimum”(1645-1715) represented.
Little ice age
Ice age
Ice core
Cite
Citations (13)
Ice age
Cite
Citations (0)
This paper examines the historical relationship between the Little Ice Age and the Anthropocene, which has not yet been studied. The Little Ice Age is the coldest multi-century period in the Holocene. The reforestation of huge farmlands, abandoned due to pandemics in the Americas, aggravated the cooling weather of the Little Ice Age. It was in the long and severe cold of the Little Ice Age that the transition from renewable energy to non-renewable energy was completed in Britain in the latter part of the eighteenth century, and when the pattern of linear growth in greenhouse gas concentrations was forged in the ecosystems of the Earth. The Little Ice Age forced humans to depend on fossil fuels while the advent of warmer and more stable climate in the Holocene enabled them to start agriculture in an energy revolution 11,000 years ago, thus making the coming of the Anthropocene possible.
Anthropocene
Ice age
Little ice age
Ice core
Deforestation
Cite
Citations (6)
Ice age
Cite
Citations (0)