Premium
Tree‐Ring Carbon Isotopic Constraints on Carbon‐Water Exchanges between Atmosphere and Biosphere in Drought Regions in Northwestern China
Author(s) -
Shilu WANG,
Guojiang WAN
Publication year - 2000
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2000.tb00465.x
Subject(s) - biosphere , isotopes of carbon , carbon cycle , environmental science , carbon fibers , atmosphere (unit) , atmospheric sciences , dendrochronology , carbon dioxide , climate change , δ13c , flux (metallurgy) , global warming , climatology , total organic carbon , stable isotope ratio , chemistry , ecology , environmental chemistry , geology , ecosystem , geography , meteorology , biology , materials science , paleontology , physics , quantum mechanics , composite number , organic chemistry , composite material
The comparison between the carbon isotope and the index of ring width of a pine disc from the Tuomuer Peak region in Xinjiang shows that the effects of climate changes on the tree‐ring growth and carbon isotopic fractionation varies with time. The reason is probably relative to the characters of climate changes and adaptability of the tree‐ring growth to climate changes. The relationships between the atmospheric CO 2 level and the revised δ 13 C air by the tree‐ring carbon isotope indicate that the carbon cycle is not in a steady state, but under a stage‐change condition in this area. It also can be concluded that the ratio of CO 2 from the terrestrial eco‐system has increased, and the flux of CO 2 exchange between the atmosphere and the biosphere was gradually increasing over the past century. In addition, the results also confirm the validity and superiority of the carbon isotope to the research of the water‐use efficiency.