Climate, Tree-Ring, and Glacial Fluctuations in the Rio Frias Valley, Rio Negro, Argentina

Villalba, Ricardo; Leiva, Juan Carlos; Rubulls, Sigfrido; Suárez, Jorge Gallastegui; Lenzano, Luis

doi:10.2307/1551585

Cited by 89 publications

(92 citation statements)

References 11 publications

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“…This situation again is similar to that recorded at Glaciar Frías, a glacier of similar size and general characteristics located ca. 110 further north in the Patagonian Andes (Villalba et al, 1990;.…”

Section: Resultsmentioning

confidence: 99%

“…7) with an equivalent record from Glaciar Frías (Villalba et al, 1990;) is interesting because: (a) these two glaciers share a similar history and many morphological characteristics (both have a similar size and grounded, continuous tongues largely devoid of supraglacial debris which expanded into relatively flat, forested valleys during the LIA); (b) they are neither affected by large, deep proglacial lakes, a thick debris cover, nor major topographical obstructions that may have modified or affected substantially their response to climate; and (c) their records of length variations were developed using similar techniques and are the most detailed currently available in southern South America . Glaciar Frías is located at higher elevations, further away from the Pacific Ocean and apparently at a drier site than GEN (see below), but nonetheless their variations could be considered relatively free of non-climatic influences and thus reliable indicators of regional climate changes at least at multi-decadal and longer timescales.…”

Section: Resultsmentioning

confidence: 99%

“…Rivera, personal communication, 2012). At this site, frontal variations since the LIA have been documented for Glaciar Río Manso, Castaño Overo and Frías on the Argentinean side (Rabassa et al, 1984;Villalba et al, 1990;Masiokas et al, 2010;. Rabassa et al (1978a) provide a detailed account of the 20th century behavior of Tronador glaciers on the Argentinean side, and Bown and Rivera (2007) studied the frontal and surface elevation changes of the Chilean Glaciar Casa Pangue during the 20th century.…”

Section: Previous Studiesmentioning

confidence: 99%

“…Over the 20th century all glaciers have experienced a very noticeable frontal retreat and thinning . A minor readvance culminating in [1976][1977] has been identified at most sites: at Frías this advance has been very well documented by field measurements and dendro-geomorphological determinations (Rabassa et al, 1978a;Villalba et al, 1990). provide a climatic interpretation of the length variations of Glaciar Frías since the LIA using a combination of a simplified surface energy-balance model and a flowline model to account for the dynamical response of the glacier to changes in the climatic forcing.…”

Section: Previous Studiesmentioning

confidence: 99%

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Fluctuations of Glaciar Esperanza Norte in the north Patagonian Andes of Argentina during the past 400 yr

2012

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Abstract.The number of studies of Little Ice Age (LIA) glacier fluctuations in southern South America has increased in recent years but is largely biased towards sites in the south Patagonian Andes. In this paper we present a detailed record of length and areal fluctuations of Glaciar Esperanza Norte (GEN) in the north Patagonian Andes of Argentina during the past four centuries. The GEN record was reconstructed through the dendro-geomorphological dating of moraines and the analysis of satellite imagery, aerial photographs and documentary material complemented with extensive field surveys. The maximum LIA extent at GEN was associated with an outer moraine dated to the mid 17th century. At least 19 subsequent readvances or standstills evidenced by morainic ridges were identified inside the most extensive LIA moraine. The dating and spacing of these moraines and the additional information available indicate that the ice front retreated much more rapidly during the 20th century than during earlier centuries. Comparison with the record of LIA fluctuations of Glaciar Frías, an ice mass of similar characteristics located 110 km to the north of GEN, shows a similar pattern of recession over the past 400 yr. Both glacier records have the peak LIA event occurring roughly during the same interval (early-mid 17th century) and show a minor readvance during the 1970s, but there are still a few discrepancies in the dating of some inner moraines. These differences may be due to local, specific factors or associated with the inherent uncertainties in the dating of the moraines. The chronologies of GEN and Frías are among the most detailed currently available in Patagonia, but a larger number of study sites is needed to develop robust, regionally representative glacier chronologies. Detailed glaciological, geomorphological and meteorological data are also needed to understand the glacier-climate relationships in this region and develop reliable paleoclimatic reconstructions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Previous Studiesmentioning

confidence: 99%

Section: Previous Studiesmentioning

confidence: 99%

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Fluctuations of Glaciar Esperanza Norte in the north Patagonian Andes of Argentina during the past 400 yr

2012

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“…Tree-ring dating, as an accurate method, has been widely used to reconstruct past glacier fluctuations in many areas of the world, such as the Canadian Rockies [11][12][13][14][15][16], the Alaska [17][18][19][20], the Andes [21][22][23][24][25][26], the Alps [27], etc. On the southeastern Tibetan Plateau, there are a great number of temperate glaciers, which account for about 22.2% of the total glacier area in China [6].…”

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confidence: 99%

Tree ring-dated fluctuation history of Midui glacier since the little ice age in the southeastern Tibetan plateau

Zhu

Shao

et al. 2012

Sci. China Earth Sci.

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Interhemispheric synchrony of Late-glacial climatic instability as recorded in proglacial Lake Mascardi, Argentina

Ariztegui

Bianchi²,

Masaferro³

et al. 1997

J. Quaternary Sci.

112

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Several high‐resolution continental records have been reported recently in sites in South America, but the extent to which climatic variations were synchronous between the northern and southern hemispheres during the Late‐glacial–Holocene transition, and the causes of the climatic changes, remain open questions. Previous investigations indicated that, east of the Andes, the middle and high latitudes of South America warmed uniformly and rapidly from 13 000 14C yr BP, with no indication of subsequent climate fluctuations, equivalent, for example, to the Younger Dryas cooling. Here we present a multiproxy continuous record, radiocarbon dated by accelerated mass spectroscopy, from proglacial Lake Mascardi in Argentina. The results show that unstable climatic conditions, comparable to those described from records obtained in the Northern Hemisphere, dominated the Late‐glacial–Holocene transition in Argentina at this latitude. Furthermore, a significant advance of the Tronador ice‐cap, which feeds Lake Mascardi, occurred during the Younger Dryas Chronozone. This instability suggests a step‐wise climatic history reflecting a global, rather than regional, forcing mechanism. The Lake Mascardi record, therefore, provides strong support for the hypothesis that ocean–atmosphere interaction, rather than global ocean circulation alone, governed interhemispheric climate teleconnections during the last deglaciation. © 1997 John Wiley & Sons, Ltd.

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Climate, Tree-Ring, and Glacial Fluctuations in the Rio Frias Valley, Rio Negro, Argentina

Cited by 89 publications

References 11 publications

Fluctuations of Glaciar Esperanza Norte in the north Patagonian Andes of Argentina during the past 400 yr

Fluctuations of Glaciar Esperanza Norte in the north Patagonian Andes of Argentina during the past 400 yr

Tree ring-dated fluctuation history of Midui glacier since the little ice age in the southeastern Tibetan plateau

Interhemispheric synchrony of Late-glacial climatic instability as recorded in proglacial Lake Mascardi, Argentina

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