Millennial-scale climate instability during the early Pleistocene epoch

Article Abstract:

Sediment records of past iceberg discharge and deep-water chemistry indicate that millennial-scale climate variations took place more than 1 million years ago, during the early Pleistocene epoch. These variations occurred during a climate regime in which the obliquity element of orbital forcing was dominant and in which it was too warm for large 100-kyr ice sheets to grow. It is possible that glacial melt water connected with periodic ice-sheet mass wasting had an impact on the Atlantic thermohaline 'conveyor belt' and therefore on world climate.

Geology, Stratigraphic, Stratigraphy, Ice age

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Millennial and orbital variations of El Nino/ Southern oscillation and high-latitude climate in the last glacial period

Article Abstract:

A high-resolution record of surface moisture, based on the degree of peat humification and the ratio of sedges to grass, from northern Queensland, Australia, covering the past 45,000 yr. is presented. It suggested that climate variations in the tropical Pacific Ocean on millennial as well as orbital timescales, which determined precipitation in northeastern Australia, also exerted an influence on North Atlantic climate through atmospheric and oceanic teleconnections.

Science & research, Queensland, Measurement, Environmental aspects, Moisture

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