Tree Rings and Climate

Fritts, Harold C.

doi:10.1038/scientificamerican0572-92

Cited by 867 publications

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“…In cold-stressed environments, the use of fairly old trees, all spanning the entire period, can largely obviate the age trend (cf. Fritts, 1976). Thus, no standardization of the tree-ring series was carried out, in order to avoid losing important long-term trends (cf.…”

Section: Methodsmentioning

confidence: 99%

Rise and demise of cold‐climate Picea abies forest in Sweden

Kullman

1996

New Phytologist

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SUMMARYThe study focuses on structural and compositional dynamics of high-elevation (boreal) mixed Picea-Betula forest in the Swedish Scandes. Data from seven years' monitoring of crown condition (defoHation), seed viability, soil and air temperatures, a tree-ring chronology and the age structure of Picea are presented. Real long-term dynamism of the tree cover was inferred from radiocarbon dates of buried subfossil wood. At all time-scales, the forest has responded sensitively to thermal variability. Picea seed viability, demography and radial growth correlated positively with summer temperature. The current Picea population largely results from warming during the first half of the 20th century. However, cooler climate in the past c. five decades has led to reduced population and radial growth as well as accelerating crown defohation. This decline is related primarily to winter soil temperatures. The mechanism of needle loss is deduced to be winter desiccation and resulting cavitation of the xylem. It is hypothesized that previous similar episodes have been balanced by periods of spruce expansion. The successional history leading up to the present stage includes fire disturbance and subsequent coohng during the Little Ice Age, which prolonged and consolidated the early post-fire Betula phase. Pinus was incapable of penetrating these unusually dense birch stands, whereas the shade-intolerant spruce could establish progressively as chmate warmed. This course of structural and compositional dynamism relates to complex interactions of disturbance, chmate change and reproductive responses.

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Section: Methodsmentioning

confidence: 99%

Rise and demise of cold‐climate Picea abies forest in Sweden

Kullman

1996

New Phytologist

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“…For this reason, the relationship between runoff and tree-ring data could be nonlinear. Plotting the estimated and recorded values or plotting one as a function of the other can reveal whether "a curvilinear model is more appropriate" [32]. Figure 6 shows the nonlinear relationship between the Yimin River annual runoff and the RC.…”

Section: Annual Runoff Reconstructionmentioning

confidence: 99%

“…Power spectral analyses were performed on the filtered components of the annual runoff (lg-transformed) reconstruction of the Yimin River [32]. Significant cycles were found for periods of ~20, 14-16 and 4-8 years.…”

Section: Regional Comparison and Teleconnectionsmentioning

confidence: 99%

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A tree-ring-based reconstruction of the Yimin River annual runoff in the Hulun Buir region, Inner Mongolia, for the past 135 years

Bao

Liu

2012

Chin. Sci. Bull.

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Based on the relationships between the regional tree-ring chronology (RC) of moisture-sensitive Pinus sylvestris var. mongolica and the monthly mean maximum temperature, annual precipitation and annual runoff, a reconstruction of the runoff of the Yimin River was performed for the period 1868-2002. The model was stable and could explain 52.2% of the variance for the calibration period of . During the past 135 years, 21 extremely dry years and 19 extremely wet years occurred. These years represented 15.6% and 14.1% of the total study period, respectively. Six severe drought events lasting two years or more occurred in

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“…As raízes expostas das coníferas têm sido estudadas como espécie controle para determinar as mudanças anatômicas das espécies deciduais (HITZ et al, 2008a). Todos os estudos sobre dendrogeomorfologia têm se focado nas áreas do clima temperado, limitado à América do Norte e Europa, sendo um desafio para futuros estudos o uso da dendrogeomorfologia em áreas tropicais (STOFFEL et al, 2013b (FRITTS, 2001;.…”

Section: Anatomia Do Lenho Das áRvoresunclassified

Aplicação da dendrogeomorfologia na caracterização e datação de processos erosivos em voçorocas na região de Piracicaba, SP

Castillo¹

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Tree Rings and Climate

Cited by 867 publications

References 0 publications

Rise and demise of cold‐climate Picea abies forest in Sweden

Rise and demise of cold‐climate Picea abies forest in Sweden

A tree-ring-based reconstruction of the Yimin River annual runoff in the Hulun Buir region, Inner Mongolia, for the past 135 years

Aplicação da dendrogeomorfologia na caracterização e datação de processos erosivos em voçorocas na região de Piracicaba, SP

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