Understanding Climate from Patagonian Tree Rings

Roig, Fidel A.; Villalba, Ricardo

doi:10.1016/s1571-0866(07)10021-x

Cited by 23 publications

(12 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nothofagus spp has proven to be an excellent tree to analyze human influences and climate change in forests from a long-term perspective in the south-central territories of Chile and Argentina [29,30]. However, the tree-rings response to increasing atmospheric CO 2 concentration, regional warming, and changes in precipitation pattern changes have been scarcely studied in the N. macrocarpa forest.…”

Section: Introductionmentioning

confidence: 99%

Recent Consequences of Climate Change Have Affected Tree Growth in Distinct Nothofagus macrocarpa (DC.) FM Vaz & Rodr Age Classes in Central Chile

Venegas‐González¹,

Roig

Rojas

et al. 2019

Forests

Self Cite

View full text Add to dashboard Cite

Forests play an important role in water and carbon cycles in semiarid regions such as the Mediterranean ecosystems. Previous research in the Chilean Mediterranean forests revealed a break point in 1980 in regional tree-ring chronologies linked to climate change. However, it is still unclear which populations and age classes are more affected by recent increases in drought conditions. In this study, we investigated the influence of recent variations in precipitation, temperature, and CO2 concentrations on tree growth of various populations and age classes of Nothofagus macrocarpa trees in Central Chile. We sampled 10 populations from five sites of N. macrocarpa through its whole geographic distribution in both Coastal and Andes ranges. We used standard dendrochronological methods to (i) group populations using principal component analysis, (ii) separate age classes (young, mature, and old trees), (iii) evaluate linear growth trends based on the basal area increment (BAI), and (iv) analyze the link between BAI and atmospheric changes using linear mixed-effects models. Results showed that young trees are more sensitive to climate variability. Regarding population grouping, we observed that all population clusters were sensitive to winter-spring precipitation, but only the Andes and Coastal populations were negatively correlated with temperature. The results of CO2 fertilization analyses were controversial and unclear. Since young trees from all population clusters reacted positively in the phase with an increase of atmospheric CO2 between 1980 and 2014, this behavior was not translated into growth for the last 15 years (2000–2014). However, it should be noted that the young trees of the highest elevation populations did not have a negative growth trend, so it seems that CO2 counteracted the negative effect of recent regional climate change (increase in temperature and precipitation decrease) in these population trees. Further studies are needed to assess the effects of climate variability over other ecological and physiological processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Recent Consequences of Climate Change Have Affected Tree Growth in Distinct Nothofagus macrocarpa (DC.) FM Vaz & Rodr Age Classes in Central Chile

Venegas‐González¹,

Roig

Rojas

et al. 2019

Forests

Self Cite

View full text Add to dashboard Cite

show abstract

“…The present study is based on 63 tree-ring width chronologies derived from Nothofagus pumilio and N. betuloides forests, mainly distributed in the Argentinean sector of Tierra del Fuego, except seven N. betuloides chronologies from the Chilean sector. The chronologies of the Argentine sector are the result of several contributions during the last 30 years (Boninsegna et al 1989;Roig et al 1996;Roig and Villalba 2008;Massaccesi et al 2008;Matskovsky et al 2019). Of these, 44 chronologies of N. pumilio were used by Matskovsky et al (2019) to analyse non-climatically induced seven-year cycles, and to remove these cycles for enhancement of climatic signal recorded in tree-ring widths.…”

Section: Tree-ring Data and Chronology Developmentmentioning

confidence: 99%

Four Centuries of Summer Temperature Changes in Tierra Del Fuego: Atmospheric Drivers and Tree-Ring Reconstruction From the Southernmost Forests of the World

Matskovsky

Roig

Fuentes

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Proxy climate records, such as those derived from tree rings, are necessary to extend relatively short instrumental meteorological observations into the past. Tierra del Fuego is the most austral territory with forests in the world, situated close to the Antarctic Peninsula, which makes this region especially interesting for paleoclimatic research. However, high-quality, high-resolution summer temperature reconstruction are lacking in the region. In this study we used 63 tree-ring width chronologies of Nothofagus pumilio and Nothofagus betuloides and partial least squares regression (PLSR) to produce annually resolved December-to-February temperature reconstruction since AD 1600 which explains up to 65% of instrumental temperature variability. We also found that observed summer temperature variability in Tierra del Fuego is primarily driven by the fluctuations of atmospheric pressure systems both in the South Atlantic and South Pacific, while it is insignificantly correlated to major hemispheric modes: ENSO and SAM. This fact makes our reconstruction important for climate modelling experiments, as it represents specific regional variability. Our reconstruction can be used for direct comparison with model outputs to better understand model limitations or to tune a model or contribute to larger scale reconstructions based on paleoclimatic data assimilation. Moreover, we showed that PLSR has improved performance over principal component regression (PCR) in the case of multiple tree-ring predictors. According to these results, PLSR may be a preferable method over PCR for the use in automated tree-ring based reconstruction approaches, akin widely used point-by-point regression.

show abstract

“…Araucaria araucana (Molina) K. Koch (pehuén), an endemic species to the northern extremes of the South American temperate Subantarctic forests of Argentina and Chile (Roig and Villalba 2008), have been demonstrated to be a useful tree species for spatial and temporal reconstructions of growth variability (Mundo et al 2012). In this work, we described the first attempt in reporting frost injuries in different positions of the Araucaria arucana treerings in the Argentine northwestern Patagonia.…”

Section: Introductionmentioning

confidence: 99%

Frost ring distribution in Araucarua araucana trees from the xeric forests of Patagonia, Argentina

2012

View full text Add to dashboard Cite

Understanding Climate from Patagonian Tree Rings

Cited by 23 publications

References 70 publications

Recent Consequences of Climate Change Have Affected Tree Growth in Distinct Nothofagus macrocarpa (DC.) FM Vaz & Rodr Age Classes in Central Chile

Recent Consequences of Climate Change Have Affected Tree Growth in Distinct Nothofagus macrocarpa (DC.) FM Vaz & Rodr Age Classes in Central Chile

Four Centuries of Summer Temperature Changes in Tierra Del Fuego: Atmospheric Drivers and Tree-Ring Reconstruction From the Southernmost Forests of the World

Frost ring distribution in Araucarua araucana trees from the xeric forests of Patagonia, Argentina

Contact Info

Product

Resources

About