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Climate of the Past An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/cp-2018-44
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
27 Apr 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Climate of the Past (CP).
Juniper tree-ring data from the Kuramenian Mountains (Republic of Tajikistan), reveals changing summer drought signals in western Central Asia
Feng Chen1, Tongwen Zhang1, Andrea Seim2, Shulong Yu1, Ruibo Zhang1, Hans W. Linderholm2, Zainalobudin V. Kobuliev3, Ahsan Ahmadov3, and Anvar Kodirov3 1Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration/Xinjiang Laboratory of Tree-Ring Ecology, Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
2Regional Climate Group, Department of Earth Science, University of Gothenburg, Gothenburg, Sweden
3Institute ofWater Problems, Hydroenergy and Ecology, Academy of Science of the Republic of Tajikistan, Dushanbe 734063, Tajikistan
Abstract. Coniferous forests cover the mountains in many parts of central Asia and provide large potentials for dendroclimatic studies of past climate variability. However, to date, only a few tree-ring based climate reconstructions exist from this region. Here we present a regional tree-ring chronology from moisture-sensitive Juniperus seravschanica from the Kuramenian Mountains (Republic of Tajikistan), which is used to reveal past summer drought variability in western Central Asia. The chronology accounts for 40.5 % of the variance of the June–July self-calibrating Palmer Drought Severity Index (scPDSI) during the instrumental period (1901 to 2012). Seven dry periods including 1659–1696, 1705–1722, 1731–1741, 1758–1790, 1800–1842, 1860–1875 and 1931–1987, and five wet periods of 1742–1752, 1843–1859, 1876–1913, 1921–1930 and 1988–2015 were identified. Good agreements between drought records from western and eastern Central Asia suggest that the PDSI records retain common drought signals and captures the regional dry/wet periods of Central Asia. Moreover, the wavelet analysis indicates the existence of centennial (100–150 years), decadal (50–60, 24.4 and 11.4 years) and interannual (8.0 and 2.0-3.5 years) cycles, which may linked with climate forcings, such as solar activity and ENSO. The analysis between the scPDSI reconstruction and large-scale atmospheric circulations during the reconstructed extreme dry and wet years can provide information about the linkages of extremes in our scPDSI record with the Asian summer monsoon activity.
Citation: Chen, F., Zhang, T., Seim, A., Yu, S., Zhang, R., Linderholm, H. W., Kobuliev, Z. V., Ahmadov, A., and Kodirov, A.: Juniper tree-ring data from the Kuramenian Mountains (Republic of Tajikistan), reveals changing summer drought signals in western Central Asia, Clim. Past Discuss., https://doi.org/10.5194/cp-2018-44, in review, 2018.
Feng Chen et al.
Feng Chen et al.
Feng Chen et al.

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Short summary
Here we present a regional tree-ring chronology from the Kuramenian Mountains which accounts for 40.5 % of the variance of the June–July self-calibrating Palmer Drought Severity Index during the instrumental period (1901 to 2012). Good agreements between drought records from western and eastern Central Asia suggest that the PDSI records retain common drought signals. This record can provide some information about the linkage of dry extremes of western Central Asia with the Asian summer monsoon.
Here we present a regional tree-ring chronology from the Kuramenian Mountains which accounts for...
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