Potencial dendroclimático de Nothofagus betuloides en la Cordillera de Darwin, Tierra del Fuego, Chile

Soto-Rogel, Pamela; Aravena, Juan Carlos

doi:10.4067/s0717-92002017000100016

Cited by 10 publications

(10 citation statements)

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“…2; Table 3). This is in line with previous findings (Boninsegna et al 1989;Soto-Rogel and Aravena 2017). Of the six newly developed chronologies, ALE shows the least agreement with the other sites, probably due to its greater distance to the other sites and the strong oceanic influences affecting greatly the western flank of the Patagonian Archipelago (e.g., Carrasco et al 2002).…”

Section: Discussionsupporting

confidence: 91%

“…This mosaic-like landscape must also be seen within a larger geographical context, which encompasses a permanent influence of the Southern Ocean, the westerly winds and a distinct precipitation gradient from west to east (Carrasco et al 2002;Schneider et al 2003;Garreaud et al 2013). These factors determine the hydrological cycle and thus, affect various ecosystems in the region, and prompt site-specific responses of tree growth to local temperature and precipitation regimes (Boninsegna et al 1989;Llancabure 2011;Lara et al 2015;Soto-Rogel and Aravena 2017).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…Other studies have analyzed the temperature and precipitation signal in Nothofagus spp. on local as well as regional scales (Villalba et al 1997(Villalba et al , 2003Llancabure 2011;Soto-Rogel and Aravena 2017). Moreover, Villalba et al (1997) included Nothofagus spp.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…Moreover, the negative correlations with temperature in winter and early spring prior to the growing season observed at ALE, DF2, DP, VD2 and PCs can be explained by different mechanisms: high winter temperatures can trigger early bud burst before growing season, making trees prone to suffer frost and hail damages from cold surges (Boninsegna et al 1989). Warm winter temperatures also induce early snow melt, affecting the water storage that will be available in the growing season; this would be more important for dry sites (Llancabure 2011, and;Soto-Rogel and Aravena 2017). Moreover, warmer conditions may facilitate disturbances caused by forest pathogens (see Logan et al 2003 and references there in) such as Ormiscodes sp., which is connected to warmer and drier winter and spring seasons in southern Chile and Argentina (Veblen et al 1996a, b).…”

Section: Precipitation and Temperature Influences On Tree Growthmentioning

confidence: 99%

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Assessing the dendroclimatic potential of Nothofagus betuloides (Magellan’s beech) forests in the southernmost Chilean Patagonia

Fuentes

Aravena

Seim

et al. 2018

Trees

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Key message Tree growth of Nothofagus betuloides forests south of 50°S is affected by local temperature and precipitation together with large-scale high-latitude climate patterns, but also significant influences from the Tropical Pacific were found. The characterization of past climate dynamics in southern South America is difficult due to the shortness of instrumental data. However, abundant forests in the southernmost part of the continent makes it an ideal place to assess the dendroclimatological potential for developing high-resolution climate proxy time series to extend the observations back in time. Whereas the majority of dendroclimatological studies have focused on latitudes north of 50°S, we present six new Magellan's beech (Nothofagus betuloides (Mirb.) Oerst.) tree-ring width (TRW) chronologies, spanning between 202 and 500 years, developed from southernmost Patagonia (> 50°S), Chile. The climate signal in the trees was analyzed using local station data, regional sea surface temperature (SST) and large-scale atmospheric indices: the Southern Oscillation Index (SOI) and the southern annual mode (SAM). The correlations between individual site chronologies and observed summer temperatures and precipitation varied, reflecting diverse microsite conditions and local scale geographic patterns. An influence of southern Pacific SST was evident at two of the northern sites. Although the associations with SOI and SAM were weak, the influence of regional sea level pressure on tree growth in the region was evident.

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Section: Discussionsupporting

confidence: 91%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Precipitation and Temperature Influences On Tree Growthmentioning

confidence: 99%

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Assessing the dendroclimatic potential of Nothofagus betuloides (Magellan’s beech) forests in the southernmost Chilean Patagonia

Fuentes

Aravena

Seim

et al. 2018

Trees

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“…In this study we address these questions. With this aim in mind, we compiled a set of tree-ring chronologies from TdF, including 44 lenga (Nothofagus pumilio) and 19 coihue de Magallanes (N. betuloides) chronologies (Boninsegna et al 1989;Massaccesi et al 2008;Roig et al 2010;Llancabure 2011;Soto-Rogel, Aravena 2017;Matskovsky et al 2019;Fuentes et al 2019). Using this data set, we compared the usefulness of partial least squares regression (PLSR) and principal components regression (PCR) methods in tree-ring based reconstructions with multiple chronologies.…”

Section: Introductionmentioning

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

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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.

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Tree-Growth Variations of Nothofagus antarctica Related to Climate and Land Use Changes in Southern Patagonia, Argentina

Vettese

Villalba

Ibáñez

et al. 2020

Latin American Dendroecology

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Potencial dendroclimático de Nothofagus betuloides en la Cordillera de Darwin, Tierra del Fuego, Chile

Cited by 10 publications

References 11 publications

Assessing the dendroclimatic potential of Nothofagus betuloides (Magellan’s beech) forests in the southernmost Chilean Patagonia

Assessing the dendroclimatic potential of Nothofagus betuloides (Magellan’s beech) forests in the southernmost Chilean Patagonia

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

Tree-Growth Variations of Nothofagus antarctica Related to Climate and Land Use Changes in Southern Patagonia, Argentina

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