Ramzi Touchan
Research Professor, Laboratory of Tree-Ring Research
Research Professor, School of Natural Resources Management and Environment
(520) 621-2992

My research is to integrate dendrochronology into natural and water resources management in the Middle East, Eastern Mediterranean (Greece, Turkey, Syria, Lebanon, Cyprus, and Jordan), and North Africa (Morocco, Algeria and, Tunisia). I conducted the first large-scale systematic dendroclimatic sampling in the eastern Mediterranean and the Middle East and North Africa. My colleagues and I developed the first climate field reconstruction using Palmer drought Index (PDSI) for North Africa. This pioneering work, supported by the National Science Foundation, is critically important in an arid region where understanding and managing water resources essential for sustaining resources. This network will be used to study interannual to century-scale climate fluctuations in the region and their links to forcing factors and large-scale patterns of ocean and atmosphere variability. Appointments: 2012-Present Research Professor at the Laboratory of Tree-Ring Research and Joint Professor at the School of Natural Resources and Environment and Center for Middle Eastern Studies, University of Arizona, Tucson, Arizona. 2004-2012 Associate Research Professor at the Laboratory of Tree-Ring Research and Joint Research Professor at the School of Natural Resources and Environment and Center for Middle Eastern Studies, University of Arizona, Tucson, Arizona 1997-2004 Senior Research Specialist, Laboratory of Tree-Ring Research, University of Arizona. 1993-97 Research Specialist, Laboratory of Tree-Ring Research, University of Arizona. 1991-97 Postdoctoral Fellow, Laboratory of Tree-Ring Research, University of Arizona. 1987-91 Graduate Student Assistant, Laboratory of Tree-Ring Research, University of Arizona. 1983-84 Research Assistant, Department of Forestry, University of Aleppo, Syria. 1977-83 Technical Manager, Union of Syrian Agriculture, Aleppo, Syria.

Selected Citations: 

Shah, S. K., Touchan, R., E. Babushkina, Shishov, V.V., Meko, D.M., et al., August-July precipitation from tree rings in forest-steppe zone of central Siberia (Russia), Tree Ring Research, In press. Touchan, R., Meko, D. M., Anchukaitis, K. J., Dendroclimatology in the eastern Mediterranean, Radiocarbon, Vol 56, Nr 4, 2014 (in press).

Slimani, S., Touchan, R., Derridj, A., Kherchouche, D., Gutiérrez, E., Fire history of Atlas cedar (Cedrus atlantica Manetti) in Mount Chélia, northern Algeria, Journal of Arid Environments, 104:116-124, 2014.

Touchan, R. Christou, A. K., Meko, D. M., Six centuries of May–July precipitation in Cyprus from tree rings. Journal of Climate Dynamics, 43:3281–3292, DOI 10.1007/s00382-014-2104-x, 2014.

Touchan, R., Anchukaitis, K. J., Shishov, V., Sivrikaya, F., Attieh, J., Ketmen, M., Stephan, J., Mitsopoulos, I., Christou, A., Meko, D. M., Spatial patterns of Eastern Mediterranean climate influence on tree growth. Holocene, 24(4) 381–392, DOI: 10.1177/0959683613518594, 2014.

Touchan, R., Meko, D.M., Ballesteros-Canovas, J.A., Sanchez-Salguero, R., Camarero, J.J., Kerchouche, D., Muntan, M., Khabcheche, D., Blanco, J.A., Rodriguez-Morata, C., Garofano-Gomez, V., L. A. Mart ́ın, L.A., R. Alfaro-Sanchez, R., Garah, K., Hevia, A., Madrigal-Gonzalez, J., Sanchez-Miranda, A., Shestakova, T.A., and Tabakova, M., Dendrochronology course in Valsaın Forest, Segovia, Spain, Tree Ring Research, 69 (2), 93–100, 2013.

Ingo Heinrich, I., Touchan, R., Liñán, I. D., Vos, H. Helle, G. Winter-to-spring temperature dynamics in Turkey derived from tree rings since AD 1125, Journal of Climate Dynamics, DOI 10.1007/s00382-013-1702-3, 2013.

Meko, D. M., Touchan, R., Villanueva Díaz, J., Griffin D., Woodhouse, C. A., Castro, C. L., Carillo, C., Leavitt, S. W., Sierra San Pedro Mártir, Baja California, cool-season precipitation reconstructed from earlywood width of Abies concolor tree rings, Journal of Geophysical Research: Biogeosciences, 118:1-14, DOI:10.1002/2013JG002408, 2013.

Touchan R., Shishov V.V., Meko D.M., Nouiri I., Grachev A. 2012. Process Based Model Sheds Light on Climate Signal of Mediterranean tree-ring width, Biogeosceinces, 9: 965–972. DOI:10.5194/bg-9-965, 2012.

Touchan, R., Woodhouse, C., Meko, D., Allen, C., Millennial precipitation reconstruction for the Jemez Mountains, New Mexico, reveals changing drought signal, International Journal of Climatology, 31: 896–906, 2011, DOI: 10.1002/joc.2117, 2011.

Meko, D.M. Touchan, R. Anchukaitis, K. J., Seascorr: a MATLAB program for identifying the seasonal climate signal in an annual tree-ring time series, Computers & Geosciences, 37:1234-1241, doi:10.1016/j.cageo.2011.01.013, 2011.

Griffin, D., Meko, D.M., Touchan, R., Leavitt, S.W., and Woodhouse, C. A., On the development of monsoon-sensitive latewood chronologies in the southwestern USA, Tree-Ring Research, issue 2, 67:87-100, 2011.

Wils, T. H. G., Sass-Klaassen, U. G. W., Eshetu, Z., Bräuning, A., Gebrekirstos, A., Couralet, C., Robertson, I., Touchan, R., Koprowski, M., Conway, D., Briffa, K., Beeckman,H., Dendrochronology in the dry tropics: the Ethiopian Case, Trees, 25:345–354, DOI 10.1007/s00468-010-0521-y, 2011.

Leavitt, S. W., Woodhouse, C. A., Castro, C. L., Wright, E. W. , Meko, D. M., R. Touchan, Griffin, D., Ciancarelli, B., The North American Monsoon in the U.S. Southwest; Potential for investigation with tree-ring carbon isotopes, Quaternary International, 235: 101-107, 2011.

Touchan, R., Woodhouse, C., Meko, D., Allen, C., Millennial precipitation reconstruction for the Jemez Mountains, New Mexico, reveals changing drought signal, International Journal of Climatology, 31: 896–906, 2011, DOI: 10.1002/joc.2117, 2011.

Margolis, E., Meko, D. M., Touchan, R., A tree-ring reconstruction of streamflow in the Santa Fe River, New Mexico, Journal of Hydrology, 397 : 118–127, 2011.

Touchan, R. Anchukaitis, K. J., Meko, D. M., Sabir, Mohammad, Attalah, S., Aloui, A., Spatiotemporal drought variability in northwestern Africa over the last nine centuries, Journal of Climate Dynamics, 37:237–252, DOI 10.1007/s00382-010-0804-4, 2011.

Wils, T. H. G., Robertson, I., Eshetu , Z., Koprowski, M., Sass-Klaassen,U. G. W., Touchan, R. and Loader, N. J., Towards a reconstruction of Blue Nile baseflow from Ethiopian tree rings, Holocene, 20(6) 837–848, 2010.

Wils, T. H. G., Robertson, I., Eshetu, Z., Touchan, R., Sass-Klaassen,U. G. W., Koprowski, M., Crossdating Juniperus procera from North Gondar, Ethiopia, Trees - Structure and Function, DOI 10.1007/s00468-010-0475-0, 2010.

Swetnam, T.W, Baisan, C.H., Caprio, A.C., Brown, P.M., Touchan, R., Anderson, R.S, and Hallett, D.J., Multi-millennial fire history of the Giant Forest, Sequoia National Park, California, USA, Fire Ecology, Vol. 5, No. 3, doi: 10.4996/fireecology.050312, 120-150, 2009.

Touchan, R., Anchukaitis, K. J., Meko, D.M., Attalah, S., Baisan, C. Aloui, A., The long term context for recent drought in northwestern Africa, Geophysical Research Letters, 35, L13705, doi:10.1029/2008GL034264, 2008.

Touchan, R., Meko, D.M., Aloui, A., Precipitation reconstruction for northwestern Tunisia from tree Ring, Journal of Arid Environment, doi:10.1016/j.jaridenv.2008.05.010, 72, 1887-1896, 2008.

Touchan, R., Akkemik, Ü., Hughes, M.K., Erkan, N., May-June Precipitation of South-Western Anatolia, Turkey during the Last 900 Years from Tree Rings, Quaternary Research, 68, 2, 196-202, 2007.

Touchan, R., Funkhouser, G., Hughes M.K., Erkan, N., Standardized precipitation index reconstructed from tree-ring width for the Turkish region, Climatic Change, 72(3), 339-353, 2005.

Research Themes: 
Climate change
Climate variability
Drought

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