Decreasing trends in sunshine duration over China for 1954-1998: Indication of increased haze pollution?

Details Decreasing trends in sunshine duration over China for 1954-1998: Indication of increased haze pollution? Decreasing trends in sunshine duration over China for 1954-1998: Indication of increased haze pollution?

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29u..38k&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 21, pp. 38-1, CiteID 2042, DOI 10.1029/2002GL016057

Mathematics

Logic

40

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Global Change: Atmosphere (0315, 0325), Meteorology And Atmospheric Dynamics: Radiative Processes, Meteorology And Atmospheric Dynamics: General Or Miscellaneous

Scientific paper

Analysis of meteorological data made available by the China Meteorological Administration (CMA) reveals significant decreases in sunshine duration over the latter half of the 20th century over much of China, especially in the eastern half of the country. Most of the decrease has occurred since about 1980, and appears to be related to large increases in atmospheric anthropogenic aerosol loading that have increased the aerosol extinction coefficient (AEC), as calculated from observations of (decreasing) visual range. A finding of particular interest is a significant decrease in summertime maximum temperature over this time period for a large portion of southeastern China near the Sichuan Basin (while the rest of China-and indeed most of the northern hemisphere-has warmed). This same region of southeastern China shows the largest decreases in sunshine duration and largest increases in AEC. The consistent spatial and temporal patterns of change in these variables seem to support the theory that aerosol loading has decreased the duration and intensity of sunshine in this region and thus lowered summertime maximum temperatures.

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