scholarly journals Negligible local-factor influences on tree ring celluloseδ18O of Qilian juniper in the Animaqing Mountains of the eastern Tibetan Plateau

Tellus B ◽  
2017 ◽  
Vol 69 (1) ◽  
pp. 1391663 ◽  
Author(s):  
Chenxi Xu ◽  
Xuemei Shao ◽  
Wenling An ◽  
Takeshi Nakatsuka ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Eastern Tibetan Plateau ◽  
Local Factor ◽  
Qilian Juniper

A 3585-YEAR RING-WIDTH DATING CHRONOLOGY OF QILIAN JUNIPER FROM THE NORTHEASTERN QINGHAI-TIBETAN PLATEAU

IAWA Journal ◽  
2009 ◽  
Vol 30 (4) ◽  
pp. 379-394 ◽  
Author(s):  
Xuemei Shao ◽  
Shuzhi Wang ◽  
Haifeng Zhu ◽  
Yan Xu ◽  
Eryuan Liang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Tree Species ◽  
Qaidam Basin ◽  
Ring Width ◽  
Northwestern China ◽  
Tree Ring Width ◽  
Living Tree ◽  
Qilian Juniper

This article documents the development of a precisely dated and wellreplicated long regional tree-ring width dating chronology for Qilian juniper (Juniperus przewalskii Kom.) from the northeastern Qinghai- Tibetan Plateau. It involves specimens from 22 archeological sites, 24 living tree sites, and 5 standing snags sites in the eastern and northeastern Qaidam Basin, northwestern China. The specimens were cross-dated successfully among different groups of samples and among different sites. Based on a total of 1438 series from 713 trees, the chronology covers 3585 years and is the longest chronology by far in China. Comparisons with chronologies of the same tree species about 200 km apart suggest that this chronology can serve for dating purposes in a region larger than the study area. This study demonstrates the great potential of Qilian juniper for dendrochronological research.

Drought signals in tree-ring stable oxygen isotope series of Qilian juniper from the arid northeastern Tibetan Plateau

2015 ◽  
Vol 125 ◽  
pp. 48-59 ◽  
Author(s):  
Chun Qin ◽  
Bao Yang ◽  
Achim Bräuning ◽  
Jussi Grießinger ◽  
Jakob Wernicke
Keyword(s):  
Tibetan Plateau ◽  
Oxygen Isotope ◽  
Tree Ring ◽  
Stable Oxygen Isotope ◽  
Qilian Juniper ◽  
Northeastern Tibetan Plateau ◽  
Stable Oxygen

scholarly journals Critical minimum temperature limits xylogenesis and maintains treelines on the Tibetan Plateau

2016 ◽  
Author(s):  
Xiaoxia Li ◽  
Eryuan Liang ◽  
Jozica Gricar ◽  
Sergio Rossi ◽  
Katarina Cufar ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Minimum Temperature ◽  
The Tibetan Plateau ◽  
Climatic Variable ◽  
Eastern Tibetan Plateau ◽  
Growing Seasons ◽  
Tree Ring Data ◽  
Xylem Growth ◽  
Ecological Mechanisms

ABSTRACTPhysiological and ecological mechanisms that define treelines are still debated. It is suggested that the absence of trees above the treeline is caused by the low temperature that limits growth. Thus, we raise the hypothesis that there is a critical minimum temperature (CTmin) preventing xylogenesis at treeline. We tested this hypothesis by examining weekly xylogenesis across three and four growing seasons in two natural Smith fir (Abies georgei var. smithii) treeline sites on the south-eastern Tibetan Plateau. Despite differences in the timing of cell differentiation among years, minimum air temperature was the dominant climatic variable associated with xylem growth; the critical minimum temperature (CTmin) for the onset and end of xylogenesis occurred at 0.7±0.4 °C. A process-based-modeled chronology of tree-ring formation using this CTmin was consistent with actual tree-ring data. This extremely low CTmin permits Smith fir growing at treeline to complete annual xylem production and maturation and provides both support and a mechanism for treeline formation.

Tree ring density-based warm-season temperature reconstruction since A.D. 1610 in the eastern Tibetan Plateau

2015 ◽  
Vol 426 ◽  
pp. 112-120 ◽  
Author(s):  
Hong Yin ◽  
Hongbin Liu ◽  
Hans W. Linderholm ◽  
Yu Sun
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Warm Season ◽  
Temperature Reconstruction ◽  
Eastern Tibetan Plateau ◽  
Ring Density

Recent ecological responses to climate variability and human impacts in the Nianbaoyeze Mountains (eastern Tibetan Plateau) inferred from pollen, diatom and tree-ring data

2013 ◽  
Vol 51 (2) ◽  
pp. 287-302 ◽  
Author(s):  
Juliane Wischnewski ◽  
Ulrike Herzschuh ◽  
Kathleen M. Rühland ◽  
Achim Bräuning ◽  
Steffen Mischke ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Climate Variability ◽  
Tree Ring ◽  
Human Impacts ◽  
Eastern Tibetan Plateau ◽  
Ecological Responses ◽  
Tree Ring Data

Post‐industrial late summer warming recorded in tree‐ring density in the eastern Tibetan Plateau

2019 ◽  
Vol 40 (2) ◽  
pp. 795-804 ◽  
Author(s):  
Jianping Duan ◽  
Lun Li ◽  
Zhuguo Ma ◽  
Liang Chen
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Late Summer ◽  
Eastern Tibetan Plateau ◽  
Ring Density ◽  
Summer Warming ◽  
Post Industrial

scholarly journals Forward modeling analysis of regional scale tree-ring patterns around the northeastern Tibetan Plateau, Northwest China

2013 ◽  
Vol 10 (6) ◽  
pp. 9969-9988 ◽  
Author(s):  
X. Gou ◽  
F. Zhou ◽  
Y. Zhang ◽  
Q. Chen ◽  
J. Zhang
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Tree Growth ◽  
Meteorological Data ◽  
Regional Scale ◽  
Growth Curves ◽  
Northwest China ◽  
Regional Patterns ◽  
Qilian Juniper ◽  
Northeastern Tibetan Plateau

Abstract. The process-based Vaganov–Shashkin (VS) model was used to simulate regional patterns of climate-tree growth relationships linking daily length, temperature and precipitation from meteorological data (AD 1957–2000) over the northeastern Tibetan Plateau (TP). The results exhibit that the leading principle component of the hypothetical growth curves is broadly consistent with that of the actual tree-ring chronologies, demonstrating the interpretability of the simulations as an accurate representation of the climatic controls on tree growth of Qilian Juniper. Output from this model both agrees well with the statistical relationships between tree-ring growth and climate factors as well as observational physiological behavior, i.e. precipitation in June acts as the most contributing role in annual ring formation of Qilian Juniper over the northeastern TP. The non-stationary and nonlinear response of tree growth to climate variability has important implications for calibration of tree-ring records for paleoclimate reconstructions and prediction for forest carbon sequestration.

scholarly journals Millennial Minimum Temperature Variations in the Qilian Mountains, China: evidence from Tree rings

2014 ◽  
Vol 10 (1) ◽  
pp. 341-380 ◽  
Author(s):  
Y. Zhang ◽  
X. Shao ◽  
Z.-Y. Yin ◽  
Y. Wang
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Minimum Temperature ◽  
Southern Oscillation ◽  
Volcanic Eruptions ◽  
Qilian Mountains ◽  
Eastern Tibetan Plateau ◽  
Tree Ring Chronology ◽  
The North ◽  
North Eastern

Abstract. A 1342 yr-long tree-ring chronology was developed from Qilian junipers in the central Qilian Mountains of the north-eastern Tibetan Plateau, China. The climatic implications of this chronology were investigated using simple correlation, partial correlation and response function analyses. The chronology was significantly positively correlated with temperature variables during the pre- and current growing seasons, especially with minimum temperature. The variability of the mean minimum temperature from January to August since 670 AD was then reconstructed based on the tree-ring chronology. The reconstruction explained 58.5% of the variance in the instrumental temperature records during the calibration period (1960–2011) and captured the variation patterns in minimum temperature at the annual to centennial time scales over the past millennium. The most recent 50 yr were the warmest period, while 1690–1880 was the coldest period since 670 AD. Comparisons with other temperature series from neighbouring regions and for the Northern Hemisphere as a whole supported the validity of our reconstruction and suggested that it provided a good regional representation of temperature change in the north-eastern Tibetan Plateau. The results of multi-taper spectral analysis showed the occurrence of significant quasi-periodic behaviour at a number of periods (2–3, 28.8–66.2, 113.6–169.5, and 500 yr), which were consistent with those associated with El Niño-Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO) and solar activity. Some reconstructed cold events may have close relationship with the volcanic eruptions.

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