本文選題：樹輪年表　切入點：PDSI　出處：《冰川凍土》2017年02期 　論文類型：期刊論文

【摘要】：祁連山東部位于亞洲季風西北邊緣區(qū),對氣候變化十分敏感。由于該區(qū)位于半干旱區(qū),降水的變化直接影響人類社會經(jīng)濟的發(fā)展,所以研究該區(qū)干旱變化情況及其機制非常重要。利用采自祁連山東部西北季風邊緣、地處半干旱區(qū)的吐魯溝地區(qū)的油松樹輪樣芯,建立了樹輪寬度年表,時間跨度為1866-2003AD。樹輪寬度年表與氣象因子相關分析結(jié)果顯示樹木生長主要響應生長季內(nèi)的降水和干旱變化。該年表與附近區(qū)域利用樹輪寬度重建的帕爾默干旱指數(shù)(PDSI)進行對比,結(jié)果顯示嚴重的干旱時間發(fā)生在1920s-1930s、1966年、1974年、1982年和1990s和21世紀初。多窗譜分析研究表明,該區(qū)年表序列存在顯著的2~4 a周期(P0.05),該周期與ENSO變率吻合,與在賀蘭山、祁連山其他地區(qū)、興隆山及貴清山研究結(jié)果一致,表明這些區(qū)域可能受共同氣候因子的影響。
[Abstract]:The eastern Qilian Mountains is located in the northwestern margin of the Asian monsoon and is very sensitive to climate change. As the region is located in the semi-arid region, the change of precipitation directly affects the development of human society and economy. Therefore, it is very important to study the drought variation and its mechanism in this area. Using the sample cores of Pinus tabulaeformis collected from the northwest monsoon edge of the eastern Qilian Mountains and located in the Turugou region in the semi-arid region, a tree ring width chronology has been established. The time span is 1866-2003.The results of correlation analysis between tree ring width and meteorological factors show that tree growth mainly responds to precipitation and drought changes in growing season. This chronology is compared with the Palmer drought index (PDSI), which is reconstructed by tree ring width in nearby area. The results show that the severe drought time occurred in 1920s-1930s, 1966, 1974, 1982, 1990s and 1982. The results of multi-window spectral analysis show that there is a significant 2-year period of P0.05A in the chronological table sequence in this area, which coincides with the rate of ENSO variability and is similar to that in Helan Mountain. The results of the studies in other areas of Qilian Mountains, Xinglong Mountain and Guiqing Mountains are consistent, indicating that these regions may be affected by common climatic factors.
【作者單位】： 蘭州大學資源環(huán)境學院西部環(huán)境教育部重點實驗室;
【基金】：國家自然科學基金項目(41401047) 蘭州大學中央高校基本科研業(yè)務費專項項目(lzujbky-2016-163)資助
【分類號】：P532

【相似文獻】

相關期刊論文 前10條

1 方克艷;勾曉華;陳發(fā)虎;彭劍峰;劉普幸;王茂;朱有明;;樹輪生態(tài)學研究進展[J];冰川凍土;2008年05期

2 陳拓,秦大河,李江風,任賈文,孫維貞;新疆阿勒泰地區(qū)近440年來大氣δ~(13)C變化——來自樹輪穩(wěn)定碳同位素序列的證據(jù)[J];蘭州石化職業(yè)技術學院學報;2001年02期

3 陳拓,秦大河,何元慶,李江風,劉曉宏,任賈文;從樹輪б~(13)C序列中提取大氣б~(13)C信息的可行性研究[J];海洋地質(zhì)與第四紀地質(zhì);2002年04期

4 趙興云,王建,錢君龍;天目山柳杉樹輪δ~(13)C年序列的共性與個性分析[J];地理與地理信息科學;2005年04期

5 趙興云;王建;錢君龍;曾昭鵬;;天目山柳杉樹輪δ~(13)C年序列差異[J];應用生態(tài)學報;2006年03期

6 王亞軍;馬玉貞;鄭影華;魯瑞潔;桑艷禮;蒙紅衛(wèi);;寧夏羅山油松(Pinus tabulae for mis)樹輪寬度對氣候因子的響應分析[J];中國沙漠;2009年05期

7 劉禹;劉娜;宋慧明;蔡秋芳;包光;王偉平;;以樹輪寬度重建秦嶺中段分水嶺地區(qū)1—7月平均氣溫[J];氣候變化研究進展;2009年05期

8 陳峰;袁玉江;王麗麗;魏文壽;李揚;Nievergelt Danie;喻樹龍;;塔城西伯利亞落葉松樹輪密度的氣候響應研究[J];干旱區(qū)資源與環(huán)境;2011年06期

9 陳峰;袁玉江;魏文壽;喻樹龍;趙勇;范子昂;李楊;張瑞波;張同文;尚華明;;樹輪記錄的伊犁地區(qū)近354年帕爾默干旱指數(shù)變化[J];高原氣象;2011年02期

10 于健;徐倩倩;何秀;羅春旺;劉文慧;李俊清;劉琪t，

本文編號：1626786