20世纪以来中国北方干旱半干旱区针叶树种径向生长动态变化  

Radial growth dynamics of coniferous species in arid and semi-arid areas of northern China since the 20th century

作　　者：陈峰 王世杰[1] 赵晓恩 陈友平 胡茂 徐阳 唐雯卉 张合理 陈巧湄 岳伟鹏 侯体源 曹红华 刘雨欣 谌卓岚 武心凤 魏家昌 王赫川 CHEN Feng;WANG Shijie;ZHAO Xiaoen;CHEN Youping;HU Mao;XU Yang;TANG Wenhui;ZHANG Heli;CHEN Qiaomei;YUE Weipeng;HOU Tiyuan;CAO Honghua;LIU Yuxin;SHEN Zhuolan;WU Xinfeng;WEI Jiachang;WANG Hechuan(Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security,Institute of International Rivers and Eco-Security,Yunnan University,Kunming 650504,China;Southwest United Graduate School,Kunming 650092,China;Key Laboratory of Tree-ring Physical and Chemical Research/Key Laboratory of Tree-ring Ecology of Xinjiang Uygur Autonomous Region,Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China)

机构地区：[1]云南大学国际河流与生态安全研究院国际河流与跨境生态安全重点实验室,昆明650504 [2]西南联合研究生院,昆明650092 [3]中国气象局乌鲁木齐沙漠气象研究所树木年轮理化重点开放实验室/新疆树木年轮生态实验室,乌鲁木齐830002

出　　处：《地理学报》2024年第9期2341-2355,共15页Acta Geographica Sinica

基　　金：国家自然科学基金项目(32061123008)。

摘　　要：全球变暖不断影响着森林生态系统的结构和功能,其中森林生产力受到大范围极端干旱的限制更为强烈,并表现出显著的空间异质性。本文通过对中国北方干旱半干旱区257个针叶树种年轮样点进行生长趋势检测和气候驱动因子评估,确定了自20世纪以来针叶树种径向生长动态变化及其对气候因子响应模式。滑动平均分析结果表明中国新疆和西北地区针叶树种径向生长呈持续增加趋势,华北地区呈波动式增加,东北地区则在20世纪中叶后呈下降趋势。空间响应模式表明水分对所有区域的针叶树种径向生长存在积极作用,气温上升引起的蒸散发加剧则会抑制径向生长,然而西北地区生长季变化对径向生长的影响受益于暖湿化现象产生的热效应。气候学分析表明大气环流因子从年际到年代际尺度上通过调节全球海温和气压强度变化,对亚洲季风区降水产生显著作用,在一定程度上影响了中国北方针叶树种径向生长动态。CMIP5数据和VS-Lite模型揭示在未来气候变化情景下受全球变暖影响,延长的生长季会促进区域针叶树种径向生长,而低降水量引起的干旱胁迫仍然对径向生长存在限制作用,特别是在水分缺乏的中国西部地区。Continuous global warming has been affecting the structure and function of forest ecosystems,and forest productivity is strongly restricted by large-scale extreme drought and shows significant spatial heterogeneity.Patterns of changes in radial growth dynamics of coniferous species and responses to climatic factors since the beginning of the 20th century were identified by examining growth trends and assessing climatic drivers based on the treering data from the 257 sampling sites in arid and semi-arid areas of northern China.The running average results indicated that radial growth of coniferous species in Xinjiang and northwest China showed a continuous increase,and radial growth of coniferous species showed a fluctuating increase in northern China,and a decline in northeast China was detected after the mid-20th century.Moisture has a positive effect on radial growth of coniferous species in all regions,and increased evapotranspiration induced by warmer temperatures will inhibit radial growth to some extent.The effect of growing season changes on radial growth in northwest China benefits from the thermal effects of warming and humidification phenomena.Climatological analyses showed that atmospheric circulation factors have some vital influences on regional precipitation generated by the Asian monsoon system by regulating global SST and baroclinic intensity changes on interannual to interdecadal scales,and potentially affecting radial growth of coniferous species in arid and semi-arid areas of northern China.CMIP5 data and VS-Lite modeling revealed impacts under future climate change scenarios,the extended growing season due to global warming promotes regional radial growth of coniferous species,and however,drought stress due to less precipitation still have some limiting effects on radial growth,especially in western China.

关 键 词：径向生长 中国北方 干旱半干旱区 气候变化 大气环流 未来预估 

分 类 号：S718.5[农业科学—林学]