基于树轮年表的新疆和塔吉克斯坦北部历史气候变化反演

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	基于树轮年表的新疆和塔吉克斯坦北部历史气候变化反演
	BAKHTIYOROV ZULFIYOR
Subtype	硕士
Thesis Advisor	YU RUIDE于瑞德)
	2018-06-01
Degree Grantor	中国科学院大学
Place of Conferral	新疆乌鲁木齐
Degree Discipline	MASTER
Keyword	树轮树木年代学气候变化云杉（Shrenkiana） Juniperus turkestanica Tree-rings Dendrochronology Climate Change Picea Shrenkiana
Abstract	在本研究中，基于 Picea Shrenkiana 和 Juniperus turkestanica 两种树种的树轮年表利用树轮年代学理论重建了塔吉克斯坦北部（天山西南部和西北部帕米尔 - 阿莱山脉）与中国西部（天山东部）的气候，并相互比较，找出异同点。研究的目的是：1、建立树轮年代表2、揭示气候条件对树木生长的影响3、重建和揭示历史时期的气候变化趋势4、气旋对树木生长的影响5、比较采样点的树轮年表。不同地区的树木生长趋势比较有助于了解大尺度气候变化和气候对树木生长的影响。 Juniperus turkestanica 和 Picea Shrenkiana 的轮宽对气候和水文变化敏感。SWC站点的树轮宽度年表和水文特征具有较好的相关性，选择 5 - 6月期来重建 SnowSpruce（Picea Shrenkiana）年表的降水。温度是影响 TTT 样点树轮宽度的最大因素之一，Juniperus turkestanica 的最佳生长期取决于凉爽的夏季月份，因为我发现Juniperus turkestanica 的树轮宽度年表与最低温度的关系良好，因此我基于树轮桧柏Juniperus turkestanica 宽度年表重建了 6 月至 9 月的最低温度。虽然 TPA 样点的树轮宽度年表与初夏降水有很好的关系，但该地区夏季降水较少，所以我利用 Juniperusturkestanica 宽度年表重建了的 4 - 8 月降水量。在塔吉克斯坦地区，TPA 和 TTT 的树轮年表显示出显著的正相关性，相关系数为 0.307（p <0.01），说明气候因素和气旋对树木生长的具有相似的影响，而同时具有 TPA 与 SWC、TTT 与 SWC 的树轮宽度年表具有负相关性，相关系数分别为-0.536（p<0.01）和-0.790 （p <0.01）。在三地树轮宽度年表的比较中，甚至发现其中一些具有负相关系数显示相似的高/低生长期，在 1910 年-1960 年、1990 年- 2010 年出现了高增长，在 1850 年-1860 年、1880 年1900 年、1930 年和 1980 年出现了低增长。基于高频周期，发现在我的研究区域中，树轮宽度生长受到了厄尔尼诺 - 南方涛动（ENSO）变率、南亚夏季风（SASM;也被称为印度夏季风）的热带双年振荡和沃克环流的影响，而在低频周期仅有北大西洋冬季的振荡能被检测到。空间相关性强调大区（即蒙古，新疆，哈萨克斯坦，吉尔吉斯斯坦，乌兹别克斯坦，土库曼斯坦，伊朗，阿富汗，巴基斯坦和塔吉克斯坦）的重建地理重要性的一致性。我的重建也有类似的代用资料记录，并证实了在中亚，南约旦，蒙古和中国的其他调查。我在全球气候变化报告和一些研究报告中发现研究结果与我的研究领域降水量增加/减少的趋势一致。对这些领域的工作和随后的工作仍在继续，我希望这些领域的研究能够帮助我更好地理解全球变暖的条件和过去的气候变化在亚洲的变化。
Other Abstract	In this study I used dendrochronological techniques to reconstruct the climate of pastfrom Northern Tajikistan (South-western Tian Shan Mountains and North-western PamirAlay Mountains) and Western China (Eastern Tian Shan Mountains) and compare each other,to find similarities and differences, based on tree-ring chronologies of Picea shrenkiana andJuniperus turkestanica tree species. The aim of the research were:i. to identify and build ring chronologyii. reveal effect of climate conditionsiii. reconstruct and demonstrate the stability of long-term climate trendiv. influencing of cyclonesv. comparative of sitesComparison of tree growth trend from different regions helps in understanding oflarge-scale climate variabilities and climatic influences. Rings width from Juniperusturkestanica and Picea shrenkiana were sensitive to climatic and hydrologic variations.Shawan county (SWC) site implied great influence of hydrological control, May-June periodwas selected to reconstruct the precipitation from Snow Spruce (Picea shrenkiana)chronologies. Tajikistan Tian Shan Mountains (TTT) the temperature is one of the highestinfluencing factors, optimal growth depends on cool summer months, since I found goodrelationships with temperature minimum, I presented reconstruction of June-Septemberminimum temperature based on tree-ring Juniperus turkestanica width. While TajikistanPamir Alay Mountains (TPA) have good relationship with early summer precipitation,whenever to scarce summer precipitation, therefore I reconstructed April-Augustprecipitation of the tree-ring chronology of Juniperus turkestanica. Tajikistans ring width(TPA & TTT) show positive significant correlation at 0.307 (p<0.01), which could providesimilar climatic and cyclonic influence to trees, while SWC with both of TPA & TTT, havenegative significance correlations -0.536 & -0.790 (p<0.01), respectively. Comparison of thethree tree-ring width chronologies even some of them have negative correlation coefficientsshows similar high/low growth periods, here are some decades of high growth 1910-1960,1990- 2010 years and low growth 1850-1860, 1880-1900, 1930, 1980 years. Based highfrequency cycles, I found that to our sites have influences of the El Niño-Southern Oscillation(ENSO) variability, tropical biennial oscillations and walker circulation affect of South Asian summer monsoon (SASM; also known as the Indian summer monsoon) on low-frequencywas detected just the winter North Atlantic oscillation. Spatial correlations emphasize theconsistency of the geographical significance of our sedimentary reconstructions in the bigarea (i.e. Mongolia, Xinjiang, Kazakhstan, Kyrgyzstan, Uzbekistan, Turkmenistan, Iran,Afghanistan, Pakistan and Tajikistan). Our reconstructions also have similar proxy recordsand confirm other investigations in Central Asia, South Jordan, Mongolia and China. I foundconsistent of increasing/decreasing precipitation in our research areas at the Global ClimateChange reports and some works. This and subsequent work on these territories continues,and I hope that research in these areas should help us better understand the change ofconditions of global warming and past climate variability in Asia.
Subject Area	Ecology(生态学)
Language	英语
Document Type	学位论文
Identifier	http://ir.xjlas.org/handle/365004/14951
Collection	研究系统_荒漠环境研究室
Affiliation	中国科学院新疆生态与地理研究所
First Author Affilication	中国科学院新疆生态与地理研究所
Recommended Citation GB/T 7714	BAKHTIYOROV ZULFIYOR. 基于树轮年表的新疆和塔吉克斯坦北部历史气候变化反演[D]. 新疆乌鲁木齐. 中国科学院大学,2018.

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