Earth rotation changes as a mechanism of long-term climate variability in the past and current centuries

Details Earth rotation changes as a mechanism of long-term climate variability in the past and current centuries Earth rotation changes as a mechanism of long-term climate variability in the past and current centuries

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.a41b0097d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #A41B-0097

Statistics

3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 3346 Planetary Meteorology (5445, 5739)

Scientific paper

Observational data are used to diagnose global temperature changes in the 20th century. A forcing impact of interannual inhomogeneity and non-uniformity of the Earth's angular velocity on the pressure field, atmospheric circulation and radiative balance of the climate system is assessed. A physical mechanism for the formation of tendencies in global climate changes as a response to composition of the greenhouse and "rotational" effects is described. Low-frequency variability in global temperature observed in the middle of the 20th century are physically explained. The statistical trend parameters are approximated by 1-st and up to optimum order trends and their significance is tested by F and T statistics. The composition of rotational and greenhouse effects explains the observed temperature trends during the last century, while the anthropogenic greenhouse changes dominate the global temperature trend since the 1970s. Multidecadal temperature trends are strongest in the sub-polar zone; they are related to regional climate modes (e.g. North Atlantic and North Pacific Oscillations), which can be partially explained by inhomogeneities in the earth's angular velocity. Rotational effects can be used to correct climate model projections for the 21st century.

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