Dendroclimatology and wheat production in Algeria

Touchan, Ramzi; Kherchouche, Dalila; Oudjehih, Bachir; Touchan, H.; Slimani, Sai͏̈d; Meko, David M.

doi:10.1016/j.jaridenv.2015.07.016

Cited by 17 publications

(14 citation statements)

References 18 publications

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“…Nevertheless, the significant partial temperature-growth correlations indicates that the climatic response of trees in the Siberian forest-steppe zone cannot be described solely by the influence of precipitation, in contrast with extremely dry regions such as the U.S. Southwest (Meko et al, 2013). In this respect, the tree-ring response to climate in the South Siberia forest-steppes is comparable to the semiarid environments of Mediterranean region, where tree-ring signal of conifer trees is driven by the divergent influence of precipitation and temperatures, although within other seasonal intervals (e.g., Touchan et al, 2016). The main advantage of this approach is the assessment of the most critical limiting factor and the interval of its greatest impact.…”

Section: Discussionmentioning

confidence: 99%

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Climatic Response of Conifer Radial Growth in Forest-Steppes of South Siberia: Comparison of Three Approaches

Belokopytova

Babushkina

Zhirnova

et al. 2018

Contemp. Probl. Ecol.

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We compared three approaches to study climatic signals of Pinus sylvestris and Larix sibirica tree-ring width chronologies from the forest-steppe zone of South Siberia, where both temperature and precipitation limit the conifer tree growth: 1) paired correlation of chronologies with monthly climatic variables; 2) paired and partial correlations with monthly and seasonal series of primary and secondary climatic factors, calculated in the Seascorr program; 3) paired correlation with a 15-day moving average series of climatic variables. The comparison showed that simple paired correlation with monthly series as the simplest approach could be used for a wide range of dendroclimatic studies, both as a main procedure and for preliminary analysis. The Seascorr analysis is the most suitable for assessing climate-growth relationship in extreme growth conditions and for reconstructions of extremes, e.g. droughts, and of their impact periods. The application of the 15-day moving average series is limited by availability of daily climatic data, but it describes the seasonal window of climatic response with high precision. Altogether, the combination of three approaches allowed to explore the spatial-temporal pattern of the conifers radial growth climatic response in South Siberia.

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Section: Discussionmentioning

confidence: 99%

“…As appears, it is the annual July-June (KAZ) or August-July (BID) precipitation. Thereby, Seascorr analysis can be especially useful in such a direction as the long-term reconstruction of climatic and other environmental variables (e.g., Meko et al, 2013;Touchan et al, 2014Touchan et al, , 2016Shah et al, 2015;Coulthard and Smith, 2016).…”

Section: Discussionmentioning

confidence: 99%

Climatic Response of Conifer Radial Growth in Forest-Steppes of South Siberia: Comparison of Three Approaches

Belokopytova

Babushkina

Zhirnova

et al. 2018

Contemp. Probl. Ecol.

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“…Various studies show long-term drying and warming trends contribute greatly to widespread and long droughts that create inevitable stress on the water resources of arid-land regions like the American Southwest, Middle East, Mongolia, and Southeast Asia (e.g. Buckley et al 2010;Siegfried et al 2011;Meko and Woodhouse 2011;Pederson et al 2013;Kelley et al 2015;Touchan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Runoff variations in Lake Balkhash Basin, Central Asia, 1779–2015, inferred from tree rings

et al. 2018

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Long highly-resolved proxies for runoff are in high demand for hydrological forecasts and water management in arid Central Asia. An accurate (R 2 =0.53) reconstruction of October-September discharge of the Ili River in Kazakhstan, 1779-2015, is developed from moisture-sensitive tree rings of spruce sampled in the Tian Shan Mountains. The fivefold extension of the gauged discharge record represents the variability of runoff in the Lake Balkhash Basin for the last 235 years. The reconstruction shows a 40 yr long interval of low discharge preceded a recent high peak in the first decade of the 2000s followed by a decline to more recent levels of discharge not seen since the start of the gauged record. Most reconstructed flow extremes (±2σ) occur outside the instrumental record (1936-2015) and predate the start of large dam construction (1969). Decadal variability of the Ili discharge corresponds well with hydrological records of other Eurasian internal drainages modeled with tree rings. Spectral analysis identifies variance peaks (highest near 42 yr) consistent with main hemispheric oscillations of the Eurasian climatic system. Seasonal comparison of the Ili discharge with sea-level-pressure and geopotential height data suggests periods of high flow likely result from the increased contribution of snow to runoff associated with the interaction of Arctic air circulation with the Siberian High-Pressure System and North Atlantic Oscillation.

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“…It means that drought events lead to synchronicity of negative extremes in yield and TRW, which is partially reason for the positive, though not always significant, correlations between them. Therefore, it should be expected that the TRW chronologies and the yield dynamics reconstructed on their basis will allow also restoring regional climatic extremes history (Touchan et al 2016).Growth and development of plants has common regularities due to the unity of resources and physiological mechanisms ( e.g. nutrition, respiration, water balance), so we should expect them to be limited by the same environmental factors typical for the semi-arid continental climatic zone Sun and Liu 2014).…”

Section: Discussionmentioning

confidence: 99%

Past crops yield dynamics reconstruction from tree-ring chronologies in the forest-steppe zone based on low- and high-frequency components

et al. 2017

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Interrelations of the yield variability of the main crops (wheat, barley, and oats) with hydrothermal regime and growth of conifer trees (Pinus sylvestris and Larix sibirica) in forest-steppes were investigated in Khakassia, South Siberia. An attempt has been made to understand the role and mechanisms of climatic impact on plants productivity. It was found that amongst variables describing moisture supply, wetness index had maximum impact. Strength of climatic response and correlations with tree growth are different for rain-fed and irrigated crops yield. Separated high-frequency variability components of yield and tree-ring width have more pronounced relationships between each other and with climatic variables than their chronologies per se. Corresponding low-frequency variability components are strongly correlated with maxima observed after 1- to 5-year time shift of tree-ring width. Results of analysis allowed us to develop original approach of crops yield dynamics reconstruction on the base of high-frequency variability component of the growth of pine and low-frequency one of larch.

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Dendroclimatology and wheat production in Algeria

Cited by 17 publications

References 18 publications

Climatic Response of Conifer Radial Growth in Forest-Steppes of South Siberia: Comparison of Three Approaches

Climatic Response of Conifer Radial Growth in Forest-Steppes of South Siberia: Comparison of Three Approaches

Runoff variations in Lake Balkhash Basin, Central Asia, 1779–2015, inferred from tree rings

Past crops yield dynamics reconstruction from tree-ring chronologies in the forest-steppe zone based on low- and high-frequency components

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