Not just a lot of hot air

Article Abstract:

Scientists predict that the global warming which will hit the earth within the middle of the 21st century will be higher than any warming sequence the earth has ever undergone before the arrival of the Homo genus. Climatologists have claimed that historically, the oceans have played an important role in regulating global temperature. Likewise, atmospheric carbon dioxide and ocean heat transfers have played an important role in controlling the rise of surface air temperature. Under conditions of increased carbon dioxide levels, ocean circulation will play a crucial role in stabilizing the earth's temperature.

Evaluation, History, Climatic changes, Climate change, Global temperature changes

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Trees retreat and ice advances

Article Abstract:

A change in the vegetative patterns, particularly the spread of the tundras, is probably responsible for the onset of the last glacial age 115,000 years ago. General circulation model experiments indicate that the expansion of the tundras towards the end of the interglacial period probably influenced the Earth's albedo to promote glaciation. An expansion in the tundra reduces the snow-free period and extends icesheets. The spread of the tundras affects soil moisture, runoff, and surface roughness. Factors such as ocean thermohaline circulation and desert dust aerosols also affect glaciation.

Ice caps, Vegetation and climate, Plant climatology

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Role of orbitally induced changes in tundra area in the onset of glaciation

Article Abstract:

The vegetative feedback from high-latitude tundra expansion is probably responsible for the onset of the last glacial age. General circulation model experiments indicate that decreased summer insolation 115,000 years ago produced enough cooling to result in expansion of the tundra. An increase in surface albedo resulting from a biome model estimate of tundra expansion 115,000 years ago is enough to start glaciation in the extreme northeastern part of Canada. Expansion due to more cooling from the estimated tundra expansion will result in glaciation over altitudes above 65 degrees north.

Observations, Albedo

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