Boundary layer humidity reconstruction for a semiarid location from tree ring cellulose δ18O

William E. Wright, Steven Leavitt

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

July-September boundary layer humidity has been reconstructed from the δ18O of cellulose in tree rings of Pinus arizonica growing at an elevation of 2300 m in the Santa Catalina Mountains north of Tucson, Arizona. The annual occurrence of morphological features in the tree rings, often called false rings, allowed accurate subdivision of the tree rings into premonsoon and monsoon growth. Highly significant correlations were found among the stable oxygen isotope time series of the wood produced during the North American Monsoon and 1953-2000 July-September average specific humidity (P < 0.0001) and relative humidity (P < 0.0001) derived from radiosonde data. The correlation coefficients were significant against data from both the Tucson surface (788 m; approximately 922 hPa) and 850 hPa pressure levels, suggesting that the δ18O time series can be interpreted as a proxy for mean seasonal boundary layer humidity. Twentieth century July-September reconstructions of specific humidity and relative humidity are presented. There are no long-term trends in the twentieth century reconstructions of boundary layer humidity at this site.

Original languageEnglish (US)
Article numberD18105
JournalJournal of Geophysical Research: Space Physics
Volume111
Issue number18
DOIs
StatePublished - Sep 27 2006

Fingerprint

tree ring
cellulose
Cellulose
humidity
boundary layers
Atmospheric humidity
Boundary layers
boundary layer
rings
twentieth century
relative humidity
monsoons
monsoon
time series
Time series
Oxygen Isotopes
radiosonde
Radiosondes
radiosondes
oxygen isotope

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography
  • Geochemistry and Petrology

Cite this

Boundary layer humidity reconstruction for a semiarid location from tree ring cellulose δ18O. / Wright, William E.; Leavitt, Steven.

In: Journal of Geophysical Research: Space Physics, Vol. 111, No. 18, D18105, 27.09.2006.

Research output: Contribution to journalArticle

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