Hydrometeorological Reconstructions for Northeastern
Mongolia Derived from Tree Rings: AD 1651-1995.

Hydrometeorological Reconstructions for Northeastern
Mongolia Derived from Tree Rings: AD 1651-1995.

Journal of Climate, Volume 14, Number 5, pp. 872-881, March 2001.

N. Pederson, G.C. Jacoby, R. D'Arrigo, and B. Buckley
Tree-Ring Laboratory, Lamont-Doherty Earth Observatory
C. Dugarjav
Institute of Botany, Ulaanbaatar, Mongolia
R. Mijiddorj
Hydrometeorological Research Institute, Ulaanbaatar, Mongolia

ABSTRACT:
Reconstructions of annual (prior August-current July) precipitation and streamflow, 345 years in length (AD 1651-1995), are presented for northeastern Mongolia based on tree-ring width data. These precipitation and streamflow reconstructions account for 54% and 48% of the respective variance in instrumental data over the past 50 years. Variations in instrumental precipitation and streamflow are within the range of those reconstructed over the length of tree-ring record. However, there appear to be more frequent extended wet periods during the 20th century. Multitaper spectral analysis revealed statistically significant peaks at 10.8 and 12.8 years for the precipitation reconstruction, and at 12.8 and 20.3-23.8 years for the streamflow reconstruction. Similarly, singular spectrum analysis identified spectral modes of variation at 12 and 21 years for both series. These spectra resemble those found for tree-ring based precipitation reconstructions in central China as well as the western USA, and may reflect solar influences on the climate of Mongolia.

DATA:
Download the reconstructed Urgun Nars annual precipitation and Kherlen River streamflow time series
and description from the WDC Paleo Archive.

Download the tree-ring data used in this study:
Urgun Nars Scots Pine Chronology and ring width measurements
Zuun Mod Siberian Larch Chronology and ring width measurements

For more information on Dendrochronology in Mongolia, please see the Lamont-Doherty Tree Ring Laboratory Mongolian Climate Studies Site.

To read or view the full study, please visit the American Meteorological Society website.
It was published in Journal of Climate Volume 14, Number 5, pp. 872-881, March 2001.

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13 March 2001