Precipitation Days Number Reconstruction by Using Tree Ring Width at the Southwest Edge of Junggar Basin

  • SHANG Huaming ,
  • WEI Wenshou ,
  • YUAN Yujiang ,
  • YU Shulong ,
  • ZHANG Ruibo ,
  • CHEN Feng ,
  • ZHANG Tongwen ,
  • QIN Li ,
  • FAN Zi'ang
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  • Institute of Desert Meteorology, China Meteorological Administration/Xinjiang Laboratory of Tree Ring Ecology/Key Laboratory of Tree-Ring Physical and Chemical Research of China Meteorological Administration, Urumqi 830002, China

Received date: 2013-07-01

  Online published: 2015-04-28

Abstract

Tree ring width data from the four sampling sites which are located at the southwest edge of Junggar Basin are used to established width chronologies here. Correlation analysis between tree ring width index and climatic factors indicates that the radical growth is dominated by moisture conditions. Tree ring width index is significantly positively correlated with precipitation and precipitation day's number and negatively with temperature, in which, the correlation coefficient between tree ring width standardized indexes of HXC and precipitation days number from February to August is 0.724. Because of the large slope and shallow soil of the sampling sites, the storage capacity of soil is weak. Heavy rain in growth season make a great contribution to precipitation amount, which result that the correlation coefficient between tree ring width index and precipitation days number is higher than that between tree ring width index and total precipitation. The linear regression method was applied to build the transfer function between tree ring width standardized chronology and precipitation days number, and the explain variance reaches 52.4%. Cross validation indicates the reliability and stability of the function. The drought history document in Yili, Tacheng and western part of northern slope of Tianshan Mountains was consistent with the reconstructed precipitation days. It also testified that reconstructed series could capture the drought events in the study area. Regional comparison between the reconstructed precipitation days at southwest edge of Junggar Basin and the precipitation history of Tianshan Mountains area and south slope of Tianshan Mountains reveals the reconstructed series in this study is more consistent with that in Tianshan Mountains.

Cite this article

SHANG Huaming , WEI Wenshou , YUAN Yujiang , YU Shulong , ZHANG Ruibo , CHEN Feng , ZHANG Tongwen , QIN Li , FAN Zi'ang . Precipitation Days Number Reconstruction by Using Tree Ring Width at the Southwest Edge of Junggar Basin[J]. Plateau Meteorology, 2015 , 34(2) : 494 -502 . DOI: 10.7522/j.issn.1000-0534.2013.00180

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