Recession of Yanamarey Glacier in Cordillera Blanca, Peru, during the 20th century

Hastenrath, Stefan; Ames, Alcides

doi:10.1017/s0022143000017883

Cited by 59 publications

(37 citation statements)

References 8 publications

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“…Differences in glacier shrinkage rates with varying slope characteristics are summarized in Table 4. An increase of glacierized surface at high slopes (Cordillera Vilcabamba during 1985-1990and 1995and Cordillera Urubamba during 1995 should be dealt with caution because it might be due to exceptionally high snowfall events, topography changes (e.g. due to seismic activity) or even errors in glacier area estimations caused by cast Glacier area change (%) 1985 1990 1995 2000 2005 2010 2015 1985-1990 1990-1995 1995-2000 2000-2005 2005-2010 2010-2015 1985-2015 Huaguruncho <5000 shadows in previous Landsat image.…”

Section: Glacier Shrinkage Differences Under Varying Topographiesmentioning

confidence: 99%

Regional climate forcing and topographic influence on glacier shrinkage: eastern cordilleras of Peru

Veettil

Wang²,

Simões

et al. 2017

Intl Journal of Climatology

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This study assessed the influence of regional climate variability and topography on surface area changes at glacierized mountain peaks of four eastern tropical Andes cordilleras between 10.5 ∘ and 13.5 ∘ S, namely, Huaguruncho, Huaytapallana, Urubamba and Vilcabamba, during the period 1985-2015 using satellite data. Time series analysis of three key climate variables (temperature, precipitation and relative humidity) at 500 hPa level was also included. Decreasing trends in precipitation and increasing relative humidity trends were observed at the northern region. Further analysis on mean distribution of wind at 500 hPa level showed significant rising trend southwards during the austral winter. Glacierized surfaces at lower altitudes were shrinking faster than those at high altitudes as expected. However, spatial orientation of glacier retreat was not similar to nearby cordilleras such as Vilcanota and Carabaya excepting for Cordillera Urubamba. Despite the high rate of precipitation due to the humidity transport from the Amazon Basin on the eastern slopes, glaciers on the eastern and north-eastern slopes in the Cordillera Urubamba retreated at a higher rate compared with those glaciers on western and south-western sides. Whether higher retreat on the eastern sides towards the south is controlled by precipitation phase changes (rain or snow) or by increased humidity levels was discussed. Furthermore, there was a predominant snowline altitude (SLA) rising trend varying between 56 and 129 m for the studied glaciers. A sharp rise in SLAs for periods 1995-2000 and 2010-2015 was attested, coinciding with warming trends in the Pacific. The relative stability in observed SLAs between 2000 and 2010 also coincided with cooling trends in the Pacific.

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Section: Glacier Shrinkage Differences Under Varying Topographiesmentioning

confidence: 99%

Regional climate forcing and topographic influence on glacier shrinkage: eastern cordilleras of Peru

Veettil

Wang²,

Simões

et al. 2017

Intl Journal of Climatology

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“…A glacier's mass balance gradient is critically determined by the climatic regime in which it sits. Globally, mountain glaciers have been retreating since the middle of the 19th century after the end of the Little Ice Age (LIA) both on a global and local scale (Fraser 2012;Giaccone et al 2015;Hastenrath, Ames 1995). This long-term melting was interrupted by advancing several times in the past, but this was too short and failed to amount to the total loss (Kaser, Georges 1999;Georges 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The Cordillera Blanca has the greatest concentration of tropical glaciers in the world and the glacier shrinkage has been well documented and it is the subject of a systematic glacier inventory and mapping (Racoviteanu et al 2008;Mark, Seltzer 2005;Silverio, Jaquet 2005;Kaser, Georges 1997;Kaser et al 1996;Hastenrath, Ames 1995). Georges (Georges 2004) estimated that the glacier covered area in the Cordillera Blanca decreased from 800-850 km 2 in 1930 to 600 km 2 at the end of the 20th century.…”

Section: Introductionmentioning

confidence: 99%

Climate change and its relation to the fluctuation in glacier mass balance in the Cordillera Blanca, Peru: A review

Juřicová

Fratianni

2018

Auc Geographica

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This review article describes the main probable causes of glacier fluctuations in the Cordillera Blanca since the end of the Little Ice Age. The Cordillera Blanca glaciers reached their last maximum extent during the Little Ice Age and have been retreating since the second half of the 19th century. The progressive glacier recession continued throughout the 20th century but was interrupted several times by periods of glacier advances. The last of these advances took place at the end of the 20th century. However, glacier advances were too short to compensate for the total glacier loss. The major phases of advance and retreat of glacier fluctuations have been well documented and climate changes seem to be their most probable drivers. However, interpreting the climatic forcing that causes such a change in the mass balance remains problematic. The response of tropical glaciers to climatic forcing is complex and glacier recession is likely to involve other components of the energy balance in thermally homogenous areas.Juřicová, A., Fratianni, S. (2018): Climate change and its relation to the fluctuation in glacier mass balance in the Cordillera Blanca, Peru: a review.

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“…Monitoring tropical glaciers makes it possible to investigate climatic variability on annual to centennial timescales in poorly documented remote regions. Observations have demonstrated a general glacial recession throughout the 20th century in the Andes [e.g., Hastenrath and Ames , 1995; Kaser , 1999; Francou et al , 2000; Ramirez et al , 2001], Africa [e.g., Kaser and Noggler , 1991; Mölg et al , 2003] and Irian Jaya [ Peterson and Peterson , 1994]. Thompson [2000] attributed the tropical glacial recession to a warming of the troposphere.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric controls of the heat balance of Zongo Glacier (16°S, Bolivia)

2005

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[1] Tropical glaciology includes investigation of climate variability in poorly documented regions of large surface-atmosphere energy exchanges. This study examines the surface energy fluxes of the Bolivian Zongo Glacier (16°S, 68°W, 6000-4900 m asl) in order to identify the atmospheric variables that control melting. Measurements from 1998 to 2000 taken from two meteorological stations in the ablation area are analyzed. During the progressive development of the wet season from September to January, melting energy was high: Solar irradiance was close to its summer solstice peak, clouds were sporadic, and albedo was low. During the core of the wet season from January to April the magnitudes of the net short-wave (+) and net long-wave (À) radiation fluxes were reduced by frequent clouds and snowfalls so that melting energy was moderate. In the dry season from May to August, melting energy was small because of the energy losses essentially in long-wave radiation but also in sublimation. The turbulent sensible heat flux to the ice (+) generally offsets the energy loss in latent heat (À), except in the dry season, when sublimation prevailed because of strong wind and dry air. Solar radiation was the main source of energy, but the seasonal changes of the melting energy were driven by long-wave radiation. In particular, clouds sharply increased the emittance of the thin high-altitude atmosphere. Closely linked to clouds and humidity, the main seasonal variables of low-latitude climates, long-wave radiation is a key variable in the energy balance of tropical glaciers.

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Recession of Yanamarey Glacier in Cordillera Blanca, Peru, during the 20th century

Cited by 59 publications

References 8 publications

Regional climate forcing and topographic influence on glacier shrinkage: eastern cordilleras of Peru

Regional climate forcing and topographic influence on glacier shrinkage: eastern cordilleras of Peru

Climate change and its relation to the fluctuation in glacier mass balance in the Cordillera Blanca, Peru: A review

Atmospheric controls of the heat balance of Zongo Glacier (16°S, Bolivia)

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