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Past break‐monsoon conditions detectable by high resolution intra‐annual δ 18 O analysis of teak rings
Author(s) -
Managave S. R.,
Sheshshayee M. S.,
Borgaonkar H. P.,
Ramesh R.
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl041172
Subject(s) - tectona , annual cycle , monsoon , annual growth % , relative humidity , environmental science , atmospheric sciences , climatology , geology , horticulture , biology , geography , meteorology
Intra‐annual variations in the cellulose oxygen isotopic composition ( δ 18 O) of several annual growth rings of three teak ( Tectona grandis L.F.) trees from central India show a clear seasonal cycle with higher values in the early and late growing seasons and lower values in the middle. This cycle is useful to identify growth occurring during different phases of the growing season. Relative humidity (RH) appears to control the intra‐annual δ 18 O variations rather than rainfall, and therefore past break‐monsoon conditions associated with lower RH, could be detected by high resolution sub‐sampling of annual rings for δ 18 O analysis.