吉尔吉斯斯坦西天山上下林线树轮对气候的响应差异  

Differences of Tree-ring Response to Climate Between Upper and Lower Treeline in the Western Tianshan Mountains of Kyrgyzstan

作　　者：张瑞波[1,2,3] 尚华明[1,2,3] 魏文寿[1,2,3] 何清[1,2,3] 袁玉江[1,2,3] 张同文[1,2,3] Ermenbaev Bakytbek 赵勇[1,2,3] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所 [2]中国气象局树轮年轮理化研究重点开放实验室 [3]新疆树木年轮生态实验室,新疆乌鲁木齐830002 [4]吉尔吉斯斯坦科学院水问题与水能研究所,吉尔吉斯斯坦比什凯克720033

出　　处：《沙漠与绿洲气象》2013年第4期1-6,共6页Desert and Oasis Meteorology

基　　金：国家国际科技合作项目(2010DFA92720-14);国家科技支撑计划项目(2012BAC23B01);国家自然科学基金(41071072;41271098;41275120;41205070);科技部公益性行业(气象)科研专项(GYHY201206014;GYHY201106013)共同资助

摘　　要：利用2012年10月采自吉尔吉斯斯坦西天山chon-kyzyl-suu附近的森林上线和下线两个采样点的雪岭云杉树轮样本,建立了上下线树轮宽度年表,结合近百年CRU气温和降水资料,分析该地区森林上下线树轮对气候响应的异同。结果表明,森林上下线树轮宽度年表一致性较好,尤其是窄轮出现年份基本相同;对气温响应方面,森林上线树轮年表与春季尤其是4—5月平均温度显著负相关;而森林下线树轮年表与夏季尤其是6—7月平均气温显著负相关。降水方面,树轮年表与上年7月到当年6月降水相关最好,森林下线年表与上年7月到当年6月的降水量相关系数超过0.61;上线也达到了0.49。降水可能是吉尔吉斯斯坦西天山北坡森林下线树木径向生长的主要限制性因子。空间相关分析表明,树轮年表能较好地代表西天山大部分区域上年7月到当年6月的降水量。In this study, we develop two tree-ring width chronologies using the Schrenk spruce tree-ring samples that was collected from the upper and lower treeline at chon-kyzyl-suu in the western Tianshan Mountains in Kyrgyzstan, and analyze similarities and differences of tree-ring response to climate between upper and lower treeline using temperature and precipitation data from the Climatic Research Unit （0.5oí0.5o）. The result showed that the tree-ring chronologies have a good consistency between upper and lower treeline. For tree-ring width chronological response to temperature, there is a good negative correlation between tree-ring width index for upper treeline and the temperature in spring（especially in April and May）, and between tree-ring width index for lower treeline and the temperature in summer （especially in June and July）. For the precipitation, the best correlation between tree-ring width chronologies in lower treeline and precipitation from preceding July to current June （r=0.61,p〈0.000 001）, and the correlation also reached 0.49 between tree-ring width chronologies in upper treeline and precipitation from preceding July to current June. The precipitation may be a major limit factor for tree growth in the area and plays a decisive role in lower treeline. The spatial correlation analysis showed that the tree -ring chronologies are a good representative to precipitation from preceding July to current June in the western Tianshan Mountains, especially for the northern slope of Tianshan Mountains in Kyrgyzstan.

关 键 词：西天山 树木年轮 天山云杉 气候响应 

分 类 号：P467[天文地球—大气科学及气象学]