Climatic potential of δ18O of Abies spectabilis from the Nepal Himalaya

Masaki Sano; M. S. Sheshshayee; S. Managave; R. Ramesh; R. Sukumar; Tatsuo Sweda

doi:10.1016/j.dendro.2009.05.005

Climatic potential of δ¹⁸O of Abies spectabilis from the Nepal Himalaya

Masaki Sano^*, M. S. Sheshshayee, S. Managave, R. Ramesh, R. Sukumar, Tatsuo Sweda

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

A 50-year tree-ring δ¹⁸O chronology of Abies spectabilis growing close to the tree line (3850 m asl) in the Nepal Himalaya is established to explore its dendroclimatic potential. Response function analysis with ambient climatic records revealed that tree-ring δ¹⁸O is primarily governed by rainfall during the monsoon season (June-September), and the regression model accounts for 35% of the variance in rainfall. Extreme dry years identified in instrumental weather data are detected in the δ¹⁸O chronology. Further, tree-ring δ¹⁸O is much more sensitive to rainfall fluctuations than other tree-ring parameters such as width and density typically used in dendroclimatology. Correlation analyses with Niño 3.4 SST reveal time-dependent behavior of ENSO-monsoon relationships.

Original language	English
Pages (from-to)	93-98
Number of pages	6
Journal	Dendrochronologia
Volume	28
Issue number	2
DOIs	https://doi.org/10.1016/j.dendro.2009.05.005
Publication status	Published - 2010
Externally published	Yes

Keywords

ENSO
Isotope dendroclimatology
Monsoon

ASJC Scopus subject areas

Ecology
Plant Science

Access to Document

10.1016/j.dendro.2009.05.005

Cite this

@article{59cebc82d0b5424f994edd1bef269ada,

title = "Climatic potential of δ18O of Abies spectabilis from the Nepal Himalaya",

abstract = "A 50-year tree-ring δ18O chronology of Abies spectabilis growing close to the tree line (3850 m asl) in the Nepal Himalaya is established to explore its dendroclimatic potential. Response function analysis with ambient climatic records revealed that tree-ring δ18O is primarily governed by rainfall during the monsoon season (June-September), and the regression model accounts for 35% of the variance in rainfall. Extreme dry years identified in instrumental weather data are detected in the δ18O chronology. Further, tree-ring δ18O is much more sensitive to rainfall fluctuations than other tree-ring parameters such as width and density typically used in dendroclimatology. Correlation analyses with Ni{\~n}o 3.4 SST reveal time-dependent behavior of ENSO-monsoon relationships.",

keywords = "ENSO, Isotope dendroclimatology, Monsoon",

author = "Masaki Sano and Sheshshayee, {M. S.} and S. Managave and R. Ramesh and R. Sukumar and Tatsuo Sweda",

note = "Funding Information: We thank the Ministry of Education, Culture, Sports, Science and Technology, Japan, for the postdoctoral fellowship to M. Sano. We are also grateful to Mr. Nagabushana and Mr. Ramesha for the help in conducting stable isotope analyses. Dr. P.N. Vinayachandran (Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science) generously provided the EQWIN data. M. Sano also thanks the Director, PRL, for permission to be associated with the Physical Research Laboratory, Ahmedabad, and the Indian Institute of Science, Bangalore, for affiliation.",

year = "2010",

doi = "10.1016/j.dendro.2009.05.005",

language = "English",

volume = "28",

pages = "93--98",

journal = "Dendrochronologia",

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AU - Sano, Masaki

AU - Sheshshayee, M. S.

AU - Managave, S.

AU - Ramesh, R.

AU - Sukumar, R.

AU - Sweda, Tatsuo

N1 - Funding Information: We thank the Ministry of Education, Culture, Sports, Science and Technology, Japan, for the postdoctoral fellowship to M. Sano. We are also grateful to Mr. Nagabushana and Mr. Ramesha for the help in conducting stable isotope analyses. Dr. P.N. Vinayachandran (Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science) generously provided the EQWIN data. M. Sano also thanks the Director, PRL, for permission to be associated with the Physical Research Laboratory, Ahmedabad, and the Indian Institute of Science, Bangalore, for affiliation.

PY - 2010

Y1 - 2010

N2 - A 50-year tree-ring δ18O chronology of Abies spectabilis growing close to the tree line (3850 m asl) in the Nepal Himalaya is established to explore its dendroclimatic potential. Response function analysis with ambient climatic records revealed that tree-ring δ18O is primarily governed by rainfall during the monsoon season (June-September), and the regression model accounts for 35% of the variance in rainfall. Extreme dry years identified in instrumental weather data are detected in the δ18O chronology. Further, tree-ring δ18O is much more sensitive to rainfall fluctuations than other tree-ring parameters such as width and density typically used in dendroclimatology. Correlation analyses with Niño 3.4 SST reveal time-dependent behavior of ENSO-monsoon relationships.

AB - A 50-year tree-ring δ18O chronology of Abies spectabilis growing close to the tree line (3850 m asl) in the Nepal Himalaya is established to explore its dendroclimatic potential. Response function analysis with ambient climatic records revealed that tree-ring δ18O is primarily governed by rainfall during the monsoon season (June-September), and the regression model accounts for 35% of the variance in rainfall. Extreme dry years identified in instrumental weather data are detected in the δ18O chronology. Further, tree-ring δ18O is much more sensitive to rainfall fluctuations than other tree-ring parameters such as width and density typically used in dendroclimatology. Correlation analyses with Niño 3.4 SST reveal time-dependent behavior of ENSO-monsoon relationships.

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