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Observed dryness and wetness variability in Shangai during 1873-2005

Auteur(s) et Affiliation(s)

ZHANG, Z.
Jiangsu Key Lab. of Forest Ecological Engineering, Forestry Univ., Nanjing, Chine
ZHANG, Q.
Nanjing Institute of Geography and Limnology, CAS, Nanjing, Chine
ZHANG, J.
Jiangsu Key Lab. of Forest Ecological Engineering, Forestry Univ., Nanjing, Chine
ZOU, L.
Shangai Meteorological Bureau, Shangai, Chine
JIANG, J.
Training Centre of China Meteorological Administration, Beijing, Chine


Description :
Dryness and wetness variations on different time scales in Shangai were analyzed using the Standardized Precipitation Index (SPI) based on monthly precipitation data for 1873-2005. The SPI on 3, 6, 12 and 24 months has been calculated. They present 4 wet periods prevailed during 1873-1885, 1904-1923, 1938-1960 and 1983-2005, and 3 dry episodes during 1886-1903, 1924-1937 and 1961-1982. Significant periods of higher wavelet power in the SPI-24 months occurred on the time scales of 2-7-year band in around 1880-1890, 1910-1950 and 1970-1990, and at 8-15-year band in 1920-1960 and 1965-2000 respectively. Periodicities in the SOI and ENSO indices are similar to those in SPI-24 months. The periodicity components in individual SPI-24 months, SOI and ENSO indices are more complicated, showing the wetness and dryness variability in Shangai is controlled by more than one physical factors.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2009, vol. 19, n°. 2, p. 143-152, nombre de pages : 10, Références bibliographiques : 1,5 p.

Date :
2009

Editeur :
Pays édition : Chine

Langue :
Anglais
Droits :
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