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Influence of climatic factors on tree-ring maximum latewood density of Picea schrenkiana in Xinjiang, China

Frontiers of Earth Science 2016年第1期10卷 126-134页

作者： Yu SUN Lili WANG Hong YIN Key Laboratory of Land Surface Pattem and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China National Climate Center China Meteorological Administration Beijing 100081 China

The influence of temperature and precipitation on maximum latewood density （MXD） was mainly discussed in this paper, based on the samples of Picea schrenkiana from the Manas River Basin, Xinjiang, China. The correlation analysis between MXD and instrumental records from the Shihezi Meteorological Station showed that the MXD was positively related to the mean maximum temperature throughout the growing season at high elevations. Comparatively, the ring-width at low altitudes was limited by the precipitation in May-June. The composite chronology by MXD sequences was highly correlated with the mean maximum temperature in July- August （r = 0.54,p 〈 0.001）, which was then reconstructed by the composite chronology. The comparative analysis on the reconstructed temperatures, observed values, and drought indices （Is） revealed that precipitation would affect MXD when the absolute value of Is was greater than 1.5a （i.e., ｜Is｜〉 2.5） in the period of 1953-2008 A.D. or close to 1.5σ for 2-3 consecutive years. The response characteristics are linked with the semiarid climate in the study area. In a single year or consecutive years of extreme dryness, the lack of precipitation would limit the thickening oflatewood cell walls and thus impact the MXD. All in all, if a MXD chronology is aimed to reconstruct temperature history, the moisture conditions at the sampling site should be considered prudently.

关键词： Picea schrenkiana tree-ring maximum late-wood density air temperature precipitation

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tree-ring-based reconstruction of temperature variability(1445–2011) for the upper reaches of the Heihe River Basin, Northwest China

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Journal of Arid Land 2016年第1期8卷 60-76页

作者： WANG Yamin FENG Qi KANG Xingcheng Alxa Desert Eco-hydrology Experimental Research Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences University of Chinese Academy of Sciences

Long-term temperature variability has significant effects on runoff into the upper reaches of inland rivers. This paper developed a tree-ring chronology of Qilian juniper (Sabina przewalskii Kom.) from the upper tree-line of the middle Qilian Mountains within the upper reaches of Heihe River Basin, Northwest China for a long-term reconstruction of temperature at the study site. In this paper, tree-ring chronology was used to examine climate-growth associations considering local climate data obtained from Qilian Meteorological Station. The results showed that temperatures correlated extremely well with standardized growth indices of trees (r=0.564, Ptree-ring chronology was highest correlated with annual mean temperature (r=0.641, Pring the periods of 1450s–1480s, 1590s–1770s, 1810s–1890s, 1920s–1940s, and 1960s–1970s. Warm intervals occurred during 1490s–1580s, 1780s–1800s, 1900s–1910s, 1950s, and 1980s to present. The coldest 100-year and decadal periods occurred from 1490s–1580s and 1780s–1800s, respectively, while the warmest 100 years within the studied time period was the 20th century. Colder events and intervals coincided with wet or moist conditions in and near the study region. The reconstructed temperature agreed well with other temperature series reconstructed across the surrounding areas, demonstrating that this reconstructed temperature could be used to evaluate regional climate change. Compared to the tree-ring reconstruct

关键词： tree-ring climatic response temperature reconstruction upper reaches of Heihe River Basin

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tree-ring-based reconstruction of the April to September mean temperature since 1826 AD for north-central Shaanxi Province,China

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Science China Earth Sciences 2008年第8期51卷 1099-1106页

作者： CAI QiuFang LIU Yu SONG HuiMing SUN JunYan The State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710075China School of Human Settlements and Civil Engineering of Xi’an Jiaotong University Xi’an 710049China

Long-time series of high-resolution temperature record from Chinese Loess Plateau is rare. An April-September mean temperature reconstruction (1826-2004) has been developed for the north-central Shaanxi Province, China, based on tree-ring width analysis. The reconstruction captures 39.3% (p<0.001) of the variance in the instrumental data over the calibration period from 1951 to 2002. The reconstruction shows a high temperature period of 1928-1933, which coincides with the timing of the extreme drought event in 1920s in the entire northern China. The two low temperature periods in reconstruction are 1883-1888 and 1938-1942. With the global warming, the April-September mean temperature in study area has also increased since the 1970s, but has not exceeded the temperature in 1928-1933. Besides the statistical analysis, the reconstruction is also verified by the local dryness/wetness index and other dendroclimatological results.

关键词： Huanglong Mountain Shaanxi Pinus tabulaeformis tree-ring width April-September mean temperature

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Growth characteristics and response to climate change of Larix Miller tree-ring in China

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Science China Earth Sciences 2010年第6期53卷 871-879页

As one of the earliest species used in dendrochronological studies, Larix responds sensitively to climate change. In this study, nine larch species and one variety from eleven sites were collected to study the growth characteristics of tree-ring width using dendrochronological methods. Ten residual tree-ring chronologies were developed to analyze their relationships with regional standardized anomaly series by Pearson’s correlation analysis. The results suggest that most of the chronologies had significantly positive correlations with the mean temperature and mean maximum temperature in May. The spring temperature evidently limited the radial growth of the larch species without precipitation control. The largest mean tree-ring width was found in Himalayan Larch in Jilong, whereas Master Larch in Si’er reflected the smallest mean value. Both species presented little climate information in this study. Chinese, Potanin, and Tibetan larches are significantly correlated with climate change, implying a huge potential for climate history reconstruction. The elevation of the sampling sites appears to be an important condition for tree-ring growth of larches responding to climate factors.

关键词： Larix Miller tree-ring climate change mean temperature in May

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A 1 835 a tree-ring chronology and its preliminary analyses in Dulan region, Qinghai

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Chinese Science Bulletin 1997年第13期42卷 1122-1124页

作者： Kang, XC Graumlich, LJ Sheppard, P Lanzhou Inst. Glaciol. Geocryology Chinese Academy of Sciences Lanzhou 730000 China Laboratory of tree-ring Research University of Arizona Tucson AZ 85721 United States

tree-ring analysis is one of the important ways for paleoclimatic reconstruction because tree-ring series of several hundred or even thousands of years are available, and can be matched orextended and accurately dated, and the tree rings can record changes in climate. In China,several thousand paleoclimatic series of data are obtained from the historical documents,

关键词： tree-ring chronology paleoclimate Dulan region.

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Re-examining the reliability of tree-ring isotope ratio as a historical CO_2 proxy

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Chinese Science Bulletin 2001年第1期46卷 17-21页

作者： HOU Aimin, PENG Shaolin, ZHOU Guoyi & WEN DazhiSouth China Institute of Botany, Chinese Academy of Sciences, Guangzhou 510275, China South China Institute of Botany Chinese Academy of Sciences Guangzhou China

To examine the reliability of using tree ring δ13C and the model of isotopic fractionation in reconstructing atmospheric CO2 levels, we studied the variations of some important parameters of several subtropical species under natural field conditions. It was found that, different from other researchers’ results, leaf conductance to CO2 transfer, g, did not change in proportion to the change in rate of CO2 assimilation, A, with the result that intercellular concentration of CO2, Ci, could not keep constant. Thus, we conclude that the use of tree-ring isotope ratios in the reconstruction of atmospheric CO2 variation based on the presupposition that Ci keeps constant during assimilation is not reliable under current circumstances.

关键词： A/g Ci tree-ring isotope ratio reconstruction atmospheric CO2 variation.

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Evidence of advancing spring xylem phenology in Chinese forests under global warming

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Science China Earth Sciences 2023年第10期66卷 2187-2199页

作者： Huihong XUE Feng SHI Fabio GENNARETTI Yongshuo H.FU Bin HE Xiuchen WU Zhengtang GUO Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China CAS Center for Excellence in Life and Paleoenvironment Beijing100044China Institut de Recherche sur les Forêts Groupe de Recherche enÉcologie de la MRC-AbitibiUniversitédu Québec en Abitibi-TémiscamingueAmosJ9T 2L8Canada College of Water Sciences Beijing Normal UniversityBeijing100875China Faculty of Geographical Science Beijing Normal UniversityBeijing100875China

Phenological responses of vegetation to the ongoing warming trend impact current and future primary productivity.However,few studies focus on wood phenology because its observed data are much scarcer,which hinders the estimation and prediction of forest carbon budgets over large regions.Here,we use a physiological process-based tree-ring growth model(Vaganov-Shashkin model)to investigate the spatial and temporal variations of spring xylem phenology(start of the growing season of xylem,SOS_(x))in tree-ring sites of China during 1962-2016 CE.The model is calibrated on measured tree-ring width chronologies(70 tree-ring chronologies)and successfully validated with field observations of xylogenesis.We found that spring xylem phenology significantly advances during 1962-2016 CE period under global warming,with the rate of advance quickly increasing after the 1990s to an average of 0.25 days per year.The preseason daily mean temperature is the main climatic driver for spring xylem phenology as indicated by its significant correlations with SOS_(x)at most sites(71%).Warmer preseason allows heat requirements for tree growth to be reached more quickly,with increase of 1℃in temperature of preseason anticipates SOS_(x)by 6 to 7 days,which will benefit the radial growth of trees in the relatively cold-humid environments.In addition,the significant positive correlation between the simulated spring xylem phenology and remote sensing derived phenology highlights the primary and secondary growth may be governed by the same variable(temperature)and change in the same direction with global warming.This study provides the long-term perspective on the spring xylem phenology variations covering most of China.

关键词： tree-ring Xylem Phenology Vaganov-Shashkin model China

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Hurst’s Memory for Chaotic, tree ring, and SOI Series

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Applied Mathematics 2014年第1期5卷 175-195页

作者： Byung-Sik Kim Hung-Soo Kim Sun-Hong Min Department of Civil Engineering Inha University Incheon South Korea Department of Urban Environmental Prevention Engineering School of Disaster Prevention Kangwon National University Gangwon South Korea

Hurst’s memory that roots in early work of the British hydrologist H.E. Hurst remains an open problem in stochastic hydrology. Today, the Hurst analysis is widely used for the hydrological studies for the memory and characteristics of time series and many methodologies have been developed for the analysis. So, there are many different techniques for the estimation of the Hurst exponent (H). However, the techniques can produce different characteristics for the persistence of a time series each other. This study uses several techniques such as adjusted range, rescaled range (RR) analysis, modified rescaled range (MRR) analysis, 1/f power spectral density analysis, Maximum Likelihood Estimation (MLE), detrended fluctuations analysis (DFA), and aggregated variance time (AVT) method for the Hurst exponent estimation. The generated time series from chaos and stochastic systems are analyzed for the comparative study of the techniques. Then, this study discusses the advantages and disadvantages of the techniques and also the limitations of them. We found that DFA is the most appropriate technique for the Hurst exponent estimation for both the short term memory and long term memory. We analyze the SOI (Southern Oscillations Index) and 6 tree-ring series for USA sites by means of DFA and the BDS statistic is used for nonlinearity test of the series. From the results, we found that SOI series is nonlinear time series which has a long term memory of H = 0.92. Contrary to earlier work, all the tree ring series are not random from our analysis. A certain tree ring series show a long term memory of H = 0.97 and nonlinear property. Therefore, we can say that the SOI series has the properties of long memory and nonlinearity and tree ring series could also show long memory and non-linearity.

关键词： Hurst’s Memory DFA Chaotic Series tree-ring Series SOI BDS Statistic

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Monsoonal precipitation variation in the East Asia since A.D. 1840 ——tree-ring evidences from China and Korea

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Science China Earth Sciences 2003年第10期46卷 1031-1039页

作者：刘禹 Won-Kyu Park 蔡秋芳 Jung-Wook Seo Hyun-Sook Jung The State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'n 710075 China School of Forest Resources Chungbuk National University Cheongju 361-763 Korea Meteorological Research Institute Korea Meteorological Administration Seoul 156-720 Korea

Three tree-ring rainfall reconstructions from China and Korea are used in this paper to investigate the East Asian summer monsoon-related precipitation variation over the past 160 years. Statistically, there is no linear correlation on a year-by-year basis between Chinese and Korean monsoon rainfall, but region-wide synchronous variation on a decadal-scale was observed. More rainfall intervals were 1860-1890, 1910-1925, and 1940-1960, and dry or even drought peri-ods were 1890-1910, 1925-1940, and 1960-present. Reconstructions also display that the East Asian summer monsoon precipitation suddenly changed from more into less around mid-1920. These tree-ring precipitation records were also confirmed by Chinese historical dry-ness/wetness index and Korean historical rain gauge data.

关键词： China, Korea, tree-ring precipitation reconstruction, East Asian summer monsoon precipitation.

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Reconstruction of summer temperature (June-August) at Mt.Helan,China,from tree-ring stable carbon isotope values since AD 1890

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Science China Earth Sciences 2002年第12期45卷 1127-1136页

作者：刘禹马利民蔡秋芳安芷生刘卫国高玲瑜 State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075 China State Key Laboratory of Pollution and Resource Reuse of Tongji University Shanghai 200092 China

From stable carbon isotope analysis of tree-rings of Chinese pine (Pinus tabulaeformis) from Mt. Helan, China, we found that high-δ13C values were related to high mean temperatures from June to August (T68), and low-δ 13C values corresponded to low T68. From these data, a transfer function has been used to reconstruct summer temperatures (T68) for the Mt. Helan region. The explained variance of reconstruction is 34.9% (F=15.01, pring in the reconstruction are 2.56 and 2.63 years.

关键词： Mt. Helan, tree-ring stable carbon isotope, the summer temperature (T68) reconstruction.

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