What is it about?
We established first tree-ring stable oxygen isotope series in the Qaidam Basin and to explore its climatic signals. This research aim to understand the climate change in the Qaidam Basin base on the tree-ring stable isotopes.
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Why is it important?
First tree-ring stable isotope series was established in this region. The mean value of the tree-ring stable oxygen isotope was the heaviest comparing all of the published tree-ring stable isotope data, which resulted from heavier d18O value of precipitation and strong transpiration in the region. The stable oxygen isotope recorded the relative humidity variability in the summer. Tree-ring stable oxygen isotope in the Qaidam basin showed a good relationship with the monsoon strength. When the monsoon is strong, the climate in the region would have a light tree-ring oxygen value, and vice verse. However, this relationship disappeared sin the 1960s due to the decrease of the monsoon. Our tree-ring stable oxygen isotope record this decline trend in the monsoon.
Perspectives
This research will provide some new viewpoint for the climatological studies. This research will provide a link between modern climate, historical climate, and paleoclimate because the stable oxygen isotope can be applied in the modern materials, natural archives such as tree rings, sediments, ice cores, etc.
Dr Guobao Xu
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences
Read the Original
This page is a summary of: Potential linkages between the moisture variability in the northeastern Qaidam Basin, China, since 1800 and the East Asian summer monsoon as reflected by tree ringδ18O, Journal of Geophysical Research Atmospheres, May 2011, American Geophysical Union (AGU),
DOI: 10.1029/2010jd015053.
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