TAILIEUCHUNG - Báo cáo lâm nghiệp:"The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis: a case study in North China"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis: a case study in North China" | Ann. For. Sci. 60 2003 145-152 INRA EDP Sciences 2003 DOI forest 2003007 145 Original article The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis a case study in North China Eryuan Lianga b Xuemei Shaoa Zhaochen Kongb and Jinxing Linb a Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing . China b Institute of Botany Chinese Academy of Sciences 100093 Beijing . China Received 14 October 2001 accepted 24 June 2002 Abstract - Using tree-ring analysis coupled with historical records we investigated the possibility of developing a tree-ring network in North China and the possible disturbance for the dieback of Meyer spruce Picea meyeri forest in typical steppe. Four tree-ring chronologies were employed one for Meyer spruce and Korean spruce Picea koraiensis in eastern Inner Mongolia and two for Chinese pine Pinus tabulaeformis in central Inner Mongolia. Significant parallel behaviour between the chronologies revealed the possibility of developing a large-scale tree-ring network in North China. In addition the coincident growth decline in the 1920s in Chinese pine and Korean spruce chronologies revealed the most severe drought period for more than 200 years in North China which was confirmed by converging lines of historical events. A clear correspondence between a peak in the age distribution 1933-1935 and a persistent drought event from 1922 to 1932 implied that the extreme drought in the 1920s was probably the underlying cause of Meyer spruce mortality. tree ring historical records drought Picea meyeri North China Résumé - La sécheresse extrême des années 1920 et son effet sur la croissance des arbres une étude dendrochronologique en Chine du Nord. La dendrochronologie et l analyse de documents historiques ont été utilisées d une part pour évaluer le potentiel d une base de données dendrochronologiques régionale et d autre part pour vérifier l existence d

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