Isotopic Evidence in Tree Rings for Historical Changes in Atmospheric Sulfur Sources

Autor:	Nobuaki Matsuoka, Masami Koike, Noriyuki Momoshima, Hidehisa Kawamura, Yoshimasa Takashima
Rok vydání:	2006
Předmět:	Pollution Air Pollutants media_common.quotation_subject Mineralogy chemistry.chemical_element General Chemistry Sulfur Trees Tracheophyta δ34S Japan chemistry Sulfur Isotopes Environmental Chemistry Environmental science Sulfur content Environmental Monitoring media_common
Zdroj:	Environmental Science & Technology. 40:5750-5754
ISSN:	1520-5851 0013-936X
Popis:	Little is understood about the usefulness of sulfur isotopic ratios (sigma 34S) in tree rings because the sulfur content in rings is generally insufficient for analysis using conventional methods. We present sigma 34S values of the water-soluble and the organically bound sulfur fractions in rings of coniferous trees grown in Japan, analyzed using a large-volume oxygen bomb. Comparing the sigma 34S values of the organically bound fraction in tree rings with past atmospheric sulfur concentrations and with those of their sources, we find clear evidence that the sigma 34S values of the organically bound fraction in the rings are dependent upon the values of the atmospheric sulfur sources. The evidence suggests that the sigma 34S values in tree rings are a useful chronological proxy for evaluating possible causes of past atmospheric sulfur pollution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a111d777b3bb47572a23ac4d17413978 https://doi.org/10.1021/es060321w Zobrazit plný text záznamu