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High-resolution reconstruction of April-September precipitation and major extreme droughts in China over the past∼530 years

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Science Bulletin 2024年第17期69卷 2756-2764页

作者： Yongxiang Zhang Hongli Wang Xuemei Shao Hongbin Liu Haifeng Zhu Lily Wang Eryuan Liang Zhixin Hao Xiuqi Fang Qibin Zhang Jinjian Li Xinghe Shi yujiang yuan Feng Chen Tongwen Zhang Ruibo Zhang Huaming Shang Jianfeng Peng National Climate Centre China Meteorological AdministrationBeijing 100081China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Beijing New Epoch School the Administrative Bureau of Chinese Academy of SciencesBeijing 100086China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Alpine Ecology Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China School of Atmospheric Sciences Plateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceChengdu University of Information TechnologyChengdu 610225China Qinghai Climate Centre Xining 810001 China Key Laboratory of Tree-Ring Physical and Chemical Research of China Meteorological Administration Key Laboratory of Tree-Ring Ecology of Xinjiang Uygur Autonomous RegionInstitute of Desert MeteorologyChina Meteorological AdministrationUrumqi 830002China Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security Institute of International Rivers and Eco-SecurityYunnan UniversityKunming 650000China College of Geography and Environmental Science Henan UniversityKaifeng 475004China

Extreme drought events have increased,causing serious losses and damage to the social economy under current warming ***,short-term meteorological data limit our understanding and projection of these *** the accumulation of proxy data,especially tree-ring data,large-scale precipitation field reconstruction has provided opportunities to explore underlying mechanisms *** point-by-point regression,we reconstructed the April-September precipitation field in China for the past~530 years on the basis of 590 proxy records,including 470 tree-ring width chronologies and 120 drought/flood *** regression models explained average 50%of the variance in *** the statistical test on calibration and verification,our models passed the significance level that assured reconstruction *** reconstruction data performed well,showing consistency and better quality than previously reported *** first three leading modes of variability in the reconstruction revealed the main distribution modes of precipitation over ***/drought and extremely wet/drought years accounted for 12.81%/10.92%(68 years/58 years)and 1.69%/3.20%(9 years/17 years)of the past~530 years in China,*** extreme drought events can be identified explicitly in our *** detailed features of the Chongzhen Great Drought(1637-1643),the Wanli Great Drought(1585-1590),and the Ding-Wu Great Famine(1874-1879),indicated the existence of potentially different underlying mechanisms that need further *** further improvements can be made for remote uninhabited areas and large deserts,our gridded reconstruction of April-September precipitation in China over the past~530 years can provide a solid database for studies on the attribution of climate change and the mechanism of extreme drought events.

关键词： Precipitation reconstruction Tree rings Historical documents Precipitation variability Extreme droughts

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Synergistic enhancement of Ce-ZnO/g-C_(3)N_(4)photocatalytic performance using N,O-bis-vacancy induction and S-scheme heterojunctions

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Journal of Rare Earths 2024年第5期42卷 817-826,I0001页

作者： Guyu Zhang yuan Zhang Xinlei Zhao yujiang Jiao Yumin Yan Jianhui Jiang Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps College of Chemistry a Chemical EngineeringTarimUniversityAlar843300China

The photocatalytic decontamination of organic pollutants is an environmentally friendly and efficient water treatment *** introduction of vacancies,heterojunctions,and doping can enhance the performance of photocatalysts for such *** this study,N,O double-vacancy Ce-ZnO/g-C_(3)N_(4)S-scheme heterojunction photocatalysts were prepared,It is found that the electron separation and transfer efficiencies are considerably improved by the presence of nitrogen vacancies in graphitic ca rbon nitride(g-C_(3)N_(4))and oxygen vacancies in ZnO,in addition to the S-scheme heterojunction created between the two *** the degradation of methylene blue and ciprofloxacin,the degradation rates exhibited by Ce-ZnO/g-C_(3)N_(4)are significantly higher than those of the g=C_(3)N_(4)/ZnO *** remarkable photocatalytic performance of Ce-ZnO/g-C_(3)N_(4)may result from three key factors;(ⅰ)Ce doping,which produces impurity energy levels;(ⅱ)the generation of electron capture centres by the N and O vacancies;and(ⅲ)the synergistic effect of the S-type heterojunction formed at the interface between the two materials,This study therefore provides new approaches for the use of doping,vacancies,and heterojunctions to induce the efficient degradation of organic pollutants.

关键词： Photocatalysis Vacancy S-scheme Ce-ZnO/g-C_(3)N_(4) Degradation Rare earths

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Reconstruction of hydrological changes based on tree-ring data of the Haba River, northwestern China

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Journal of Arid Land 2018年第1期10卷 53-67页

作者： zhang tongwen yuan yujiang chen feng yu shulong zhang ruibo qin li jiang shengxia institute of desert meteorology china meteorological administrationUrumqi 830002China key laboratory of tree-ring physical and chemical research of china meteorological administration Urumqi 830002China key laboratory of tree-ring ecology of xinjiang uygur autonomous region Urumqi 830002China

Reconstructing the hydrological change based on dendrohydrological data has important implications for understanding the dynamic distribution and evolution pattern of a given river. The widespread, long-living coniferous forests on the Altay Mountains provide a good example for carrying out the dendrohydrological studies. In this study, a regional composite tree-ring width chronology developed by Lariat sibirica Ledeb. and Picea obovata Ledeb. was used to reconstruct a 301-year annual （from preceding July to succeeding June） streamflow for the Haba River, which originates in the southern Altay Mountains, Xinjiang, China. Results indicated that the reconstructed streamflow series and the observations were fitting well, and explained 47.5% of the variation in the observed streamflow of 1957-2008. Moreover, floods and droughts in 1949-2000 were precisely captured by the streamflow reconstruction. Based on the frequencies of the wettest/driest years and decades, we identified the 19th century as the century with the largest occurrence of hydrological fluctuations for the last 300 years. After applying a 21-year moving average, we found five wet （1724-1758, 1780-1810, 1822-1853, 1931-1967, and 1986-2004） and four dry （1759-1779, 1811-1821, 1854-1930, and 1968-1985） periods in the streamflow reconstruction. Furthermore, four periods （1770-1796, 1816-1836, 1884-1949, and 1973-1997） identified by the streamflow series had an obvious increasing trend. The increasing trend of streamflow since the 1970s was the biggest in the last 300 years and coincided with the recent warming-wetting trend in northwestern China. A significant correlation between streamflow and precipitation in the Altay Mountains indicated that the streamflow reconstruction contained not only local, but also broad-scale, hydro-climatic signals. The 24-year, 12-year, and 2.2-4.5-year cycles of the reconstruction revealed that the streamflow variability of the Haba River may be influenced by solar activity and

关键词： Larzx sibiffca Ledeb. Picea obovata Ledeb. streamflow reconstruction tree-ring width Altay Mountains

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High cerium content(Nd-Pr-Ce)_(2)Fe_(14)B melt-spun ribbons with high coercivity

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Journal of Rare Earths 2024年第4期42卷 690-695页

作者： yujiang Zhong Junming Wang Zikai yuan Ruijin Liu Minggang Zhu Zhe Liu Xin Chen Wei Li Zhaohui Guo Division of Functional Materials Central Iron and Steel Research InstituteBeijing100081China Ningbo Jinji Strong Magnetic Material Co. Ltd.Ningbo315172China Jiangxi Jiangwu Rare Metal New Material Co. Ltd.Nanchang330013China

The effects of wheel speeds on the magnetic properties and microstructures of[(Nd,Pr)_(1-x)Ce_(x)]-Fe-B meltspun ribbons were *** to melt-spun ribbons with low cerium(Ce)content(x=0.2),amorphous formation can be suppressed at high wheel speed in the ribbons with a relatively high Ce content(x=0.8),and with the increase of the wheel speed,the magnetic properties of the ribbons with high Ce content raise *** high wheel speed,the coercivity mechanism of melt-spun ribbons is mainly pinning field,and the high wheel speed introduces a large number of defects into the matrix as pinning ***,ribbons with high Ce content form a fine and uniform grain structure,so the grain boundary area enlarges,which further hinders the movement of domain *** combined effects of the above factors enable ribbons with high Ce content to have excellent magnetic properties(Hcj=0.977 T,Mr=64 m^(2) A/kg)at the wheel speed of 35 m/s.

关键词： Wheel speed Cecontent Microstructure Magnetic properties Rare earths

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Climatic response of Pinus sylvestris var. mongolica tree-ring width and precipitation reconstruction for the northern Greater Higgnan Mountains, China, since 1720

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Research in Cold and Arid Regions 2014年第6期6卷 546-555页

作者： TongWen Zhang yujiang yuan WenShou Wei RuiBo Zhang ShuLong Yu Feng Chen HuaMing Shang Li Qin ZiAng Fan Institute of Desert Meteorology China Meteorological Administration Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration Key Laboratory of Tree-ring Ecology of Uighur Autonomous Region

August-June precipitation has been reconstructed back to AD 1720 for the northern Greater Higgnan Mountains, China, by use ofPinus sylvestris var. mongolica tree-ring width. The reconstruction explains the variance of 39% in observed precipitation from 1973 to 2008. Some extremely dry/wet signals in historical documents and other precipitation reconstructions in previous studies are precisely captured in our reconstruction. Wet periods occurred during the periods of 1730 to 1746, 1789 to 1812, 1844 to 1903, 1920 to 1930, 1942 to 1961, and 1985 to 1998; while periods of 1747 to 1788, 1813 to 1843, 1904 to 1919, 1931 to 1941, and 1962 to 1984 were relatively dry. Power spectral and wavelet analyses demon- strated the existence of significant 24-year, 12-year, and 2-year cycles of variability.

关键词： Greater Higgnan Mountains Pinus sylvestris var. mongolica tree-ring width precipitation reconstruction

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利用树轮车表重建和预测天山北坡牧草产量

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干旱区资源与环境 1989年第1期3卷 81-89页

作者：袁玉江新疆气象科学研究所

新疆是我国五大牧区之一。以前,由于牧草产量资料和气候资料短缺,难以据此用统计学方法做出2000年以前的牧草产量预报。本文试图另辟新径,利用北重中山带的树木年轮年表,与低山带牧草产量受相同气候因子制约的特点,由年表延长牧草产量序... 详细信息

新疆是我国五大牧区之一。以前,由于牧草产量资料和气候资料短缺,难以据此用统计学方法做出2000年以前的牧草产量预报。本文试图另辟新径,利用北重中山带的树木年轮年表,与低山带牧草产量受相同气候因子制约的特点,由年表延长牧草产量序列,进行未来数十年牧草产量变化趋势的预测,并发现1989～2000年将是一个牧草产量较低的时期,可供北重畜牧业的远景规划提供参考依据。

关键词：牧草产量树木年轮年表天山北坡树轮夏季降水主分量响应函数气候资料气候因子牧草生长期

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树轮晚材最大密度记录的青藏高原东北部公元1725年以来5～8月温度变化

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第四纪研究 2015年第5期35卷 1112-1120页

作者：陈峰袁玉江喻树龙中国气象局乌鲁木齐沙漠气象研究所、中国气象局树木年轮理化研究重点开放实验室、新疆树木年轮生态实验室乌鲁木齐830002

利用采自尕海-则岔自然保护区的岷江冷杉树轮样本,建立树轮晚材最大密度年表.通过相关分析发现,研究区岷江冷杉树轮晚材最大密度与暖季（5～8月）温度变化存在显著正相关关系.其中,与5～8月平均最高温度（1967～ 2008年）的相关最高（r=... 详细信息

利用采自尕海-则岔自然保护区的岷江冷杉树轮样本,建立树轮晚材最大密度年表.通过相关分析发现,研究区岷江冷杉树轮晚材最大密度与暖季（5～8月）温度变化存在显著正相关关系.其中,与5～8月平均最高温度（1967～ 2008年）的相关最高（r=0.635,p＜0.001）.在此基础上,利用树轮晚材最大密度重建了藏东北玛曲地区过去284年来的5～8月平均最高温度变化,重建方程稳定可靠,重建方程的方差解释量为40.4％（R2adj=38.9％,N=42,F=27.09）.重建结果显示,在过去的284年中玛曲地区5～8月平均最高温度的异常高温年份为38年,异常低温年份为42年,且存在5个温度偏低时段（1725 ～ 1746年、1769～1819年、1834～ 1845年、1857 ～ 1869年和1965 ～ 1988年）和5个温度偏高时段（1747～ 1758年、1820～1833年、1846～1856年、1870～ 1964年和1989～2008年）.通过对比分析,发现玛曲温度重建序列与昌都温度重建序列具有良好的同步性,它们之间的第一主成分序列能够准确指示公元1725年以来青藏高原东部大范围暖季温度变化.在与海温数据的公共时段内（1854～ 2000年）,青藏高原东部两个温度序列的第一主成分序列和海温场的相关分析显示,北印度洋孟加拉湾和西太平洋中低纬度的海温对于青藏高原东部暖季温度变化影响显著;同时,青藏高原东部地区暖季温度与中东太平洋海温的负相关说明其变化还可能受到ENSO影响,研究还发现青藏高原东部地区暖季温度与印度夏季风存在关联.

关键词：藏东北玛曲岷江冷杉(Abies faxoniana) 晚材最大密度温度重建海温

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塔克拉玛干地区近四十年来的干湿变化

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干旱区地理 1998年第1期21卷 18-24页

作者：袁玉江李江风叶玮新疆气象科学研究所乌鲁木齐830002 中国科学院新疆地理研究所乌鲁木齐830011

本文利用塔克拉玛干、周围山区、及相邻地区的48个气象站近40年的降水资料，分析塔克拉玛干地区年与四季干湿变化的阶段与周期，并与周围山区及相邻地区进行相关性分析，探讨其与极涡位置的关系，得当了一些统计结论，对于研究塔克拉玛... 详细信息

本文利用塔克拉玛干、周围山区、及相邻地区的48个气象站近40年的降水资料，分析塔克拉玛干地区年与四季干湿变化的阶段与周期，并与周围山区及相邻地区进行相关性分析，探讨其与极涡位置的关系，得当了一些统计结论，对于研究塔克拉玛干地区的现代干湿变化规律，具有一定的意义。

关键词：塔克拉玛干地区干湿变化年降水量气候变化

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Intra-annual radial growth of Schrenk spruce（Picea schrenkiana Fisch. et Mey） and its response to climate on the northern slopes of the Tianshan Mountains

Intra-annual radial growth of Schrenk spruce（Picea schrenki...

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中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Ruibo Zhang yujiang yuan Xiaohua Gou Tongwen Zhang Cheng Zou chunrong Ji Zi’ang Fan li Qin 中国气象局乌鲁木齐沙漠气象研究所兰州大学资源环境学院

Schrenk spruce（Picea schrenkiana *** Mey.） is widely distributed in the Tianshan *** this study,four Schrenk spruce trees were continuously monitored with dendrometers from 27 April to 30 September 2014 on the northern slopes of the Tianshan Mountains in northwest *** goal of this monitoring study was to determine the main growing season of Schrenk spruce and to analyze intra-annual radial growth variability and its relation to daily meteorological *** studies have shown that the critical growing season of Schrenk spruce is from late May to late July and that the rapid growth stage is from mid-June to early ***,in the growing season,changes in the radial growth of Schrenk spruce were negatively correlated with daily temperature,evaporation,sunshine hours and vapor pressure deficit（VPD）,and were positively correlated with precipitation and relative humidity（RH）.The correlation coefficient between radial growth and RH can be as high as 0.750（Pearson,p ＜ 0.0001,n = 60）.Dates in which precipitation occurred corresponded to periods of rapid *** results of the climate-growth analysis show that changes in radial growth reflect the effect of water stress on tree growth,whether or not the changes are positively or negatively correlated with the above climatic *** indicates that moisture plays a major role in the growth of Schrenk *** suggest that precipitation between late May to late June is a limiting factor for radial growth of Schrenk spruce on the northern slopes of the Tianshan Mountains.

关键词： Climate response Schrenk spruce (Picea schrenkiana Fisch. et Mey.) radial growth Tianshan Mountains

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Tree-ring response to snow cover and reconstruction of century annual maximum snow depth for northern Tianshan Mountains, China

Tree-ring response to snow cover and reconstruction of centu...

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中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Li Qin yujiang yuan Ruibo Zhang Wenshou wei Shulong Yu Ziang Fan Feng Chen Tongwen Zhang Huaming Shang Institute of Desert and Meteorology China Meteorological Administration/Xinjiang Laboratory of Tree Ring Ecology/Key Laboratory of Tree-ring Physical Chemical ResearchChina Meteorological Administration

Heavy snowfall and extreme snow depth cause serious losses of human life and property in the northern Tianshan Mountains almost every *** cover is an important indicator of climate *** this study,we developed five tree-ringwidth chronologies of Schrenk spruce（Picea schrenkiana *** Mey） from the northern Tianshan Mountains using standard dendrochronological *** analyses indicated that radial growth of trees in the northern Tianshan Mountains is positively affected by annual maximum snow *** relationship was validated and models of annual maximum snow depth back to the 18 th century were *** reconstruction explains 48.3% of the variance in the instrumental temperature records during the 1958/59–2003/04 calibration *** indicates that quasi-periodic changes exist on 2.0–4.0-yr,5.3-yr,14.0-yr,and 36.0-yr *** reconstructed series shows that maximum snow depth exhibits obvious stages change,the periods characterized by lower maximum snow depth were 1809/10–1840/41,1873/74–1893/94,1909/10–1929/30,1964/65–1981/82,and the periods characterized by higher maximum snow depth were 1841/42–1872/73,1894/95–1908/09,1930/31–1963/64,and 1982/83–*** lower period of annual maximum snow depth during the 1920 s–1930 s is consistent with the severe drought that occurred at this time in northern *** the 1970 s to the present,the maximum snow depth has increased clearly with the change to a warmer and wetter climate in *** reconstruction sheds new light on snow cover variability and change in a region where the climate history for the past several centuries is poorly understood.

关键词： northern Tianshan Mountains reconstruction tree-ring maximum snow depth

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