Abstract
Linear trend analysis of observational data combined with model diagnostics from an atmospheric general circulation model are employed to search for potential mechanisms related to the observed glacier retreat in the tropical Andes between 1950 and 1998. Observational evidence indicates that changes in precipitation amount or cloud cover over the last decades are minor in most regions and are therefore rather unlikely to have caused the observed retreat. The only exception is in southern Peru and western Bolivia where there is a general tendency toward slightly drier conditions. Near-surface temperature on the other hand has increased significantly throughout most of the tropical Andes. The temperature increase varies markedly between the eastern and western Andean slopes with a much larger temperature increase to the west. Simulations with the ECHAM-4 model, forced with observed global sea surface temperatures (SST) realistically reproduce the observed warming trend as well as the spatial trend pattern. Model results further suggest that a significant fraction of the observed warming can be traced to a concurrent rise in SST in the equatorial Pacific and that the markedly different trends in cloud cover to the east and west of the Andes contributed to the weaker warming east of the Andes in the model. The observed increase in relative humidity, derived from CRU 05 data, is also apparent in the model simulations, but on a regional scale the results between model and observations vary significantly. It is argued that changes in temperature and humidity are the primary cause for the observed glacier retreat during the 2nd half of the 20th century in the tropical Andes.
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References
Aceituno, P. and Montecinos, A.: 1997, ‘Patterns of Convective Cloudiness in South America during Austral Summer from OLR Pentads’, in Preprints, Fifth Int. Conf. on Southern Hemisphere Meteorology and Oceanography, Pretoria, South Africa, Amer. Meteor. Soc., 328–329.
Ames, A. and Hastenrath, S.: 1996, ‘Mass Balance and Ice Flow of the Uiruashraju Glacier, Cordilera Bianca, Peru’, Zeitschrift für Gletscherkunde und Glazialgeologie 32, 83–89.
Ames, A.: 1998, ‘A Documentation of Glacier Tongue Variations and Lake Development in the Cordillera Bianca, Peru’, Zeitschrift für Gletscherkunde und Glazialgeologie 34, 1–36.
Brecher, H. H. and Thompson, L. G.: 1993, ‘Measurement of the Retreat of Qori Kalis Glacier in the Tropical Andes of Peru by Terrestrial Photogrammetry’, Photogramm. Eng. Rem. Sens. 59, 1017–1022.
Casey, K. S. and Cornillon, P.: 2001, ‘Global and Regional Sea Surface Temperature Trends’, J. Climate 14, 3801–3818.
Chen, J., Carlson, B. E., and Del Genio, A. D.: 2002, ‘Evidence for Strengthening of the Tropical General Circulation in the 1990s’, Science 295, 838–841.
Chen, T.-C., Yoon, J. H. St. Croix, K. J., and Takle, E. S.: 2001, ‘Suppressing Impacts of the Amazonian Deforestation by the Global Circulation Change’, Bull. Amer. Meteorol. Soc. 82, 2209–2216.
Chu, P.-S., Yu, Z.-P., and Hastenrath, S.: 1994, ‘Detecting Climate Change Concurrent with Deforestation in the Amazon Basin: Which Way Has It Gone?’, Bull. Amer. Meteorol. Soc. 75, 579–583.
Curtis, S. and Hastenrath, S.: 1999a, ‘Long-term Trends and Forcing Mechanisms of Circulation and Climate in the Equatorial Pacific’, J. Climate 12, 1134–1144.
Curtis, S. and Hastenrath, S.: 1999b, ‘Trends of Upper-air Circulation and Water Vapour over Equatorial South America and Adjacent Oceans’, Int. J. Clim. 19, 863–876.
Diaz, H. F. and Graham, N. E.: 1996, ‘Recent Changes in Tropical Freezing Heights and the Role of Sea Surface Temperature’, Nature 383, 152–155.
Francou, B., Ramirez, E., Caceres, B., and Mendoza, J.: 2000, ‘Glacier Evolution in the Tropical Andes during the Last Decades of the 20th Century: Chacaltaya, Bolivia and Antizana, Ecuador’, Ambio 29, 416–422.
Francou, B., Vuille, M., Wagnon, P., Mendoza J., and Sicart, J. E.: 2003, ‘Tropical Climate Change Recorded by a Glacier in the Central Andes during the Last Decades of the 20th Century: Chacaltaya, Bolivia, 16° S’, J. Geophys. Res. 108 D5, 4154, doi: 10.1029/2002JD002959.
Gaffen, D. J., Sanier, B. D., Boyle, J. S., Christy, J. R., Graham, N. E., and Ross, R. J.: 2000, ‘Multidecadal Changes in the Vertical Temperature Structure of the Tropical Troposphere’, Science 287, 1242–1245.
Garreaud, R. and Aceituno, P.: 2001, Tnterannual Rainfall Variability over the South American Altiplano’, J. Climate 14, 2779–2789.
Garreaud, R., Vuille, M., and Clement, A.: 2003, ‘The Climate of the Altiplano: Observed Current Conditions and Mechanisms of Past Changes’, Palaeogeogr. Palaeoclimatol. Palaeoecol. 194, 5–22.
Gutzler, D. S.: 1992, ‘Climatic Variability of Temperature and Humidity over the Tropical Western Pacific’, Geophys. Res. Lett. 19, 1595–1598.
Hastenrath, S. and Kruss, P. D.: 1992a, ‘Greenhouse Indicators in Kenya’, Nature 355, 503–504.
Hastenrath, S. and Kruss, P. D.: 1992b, ‘The Dramatic Retreat of Mount Kenya’s Glaciers between 1963 and 1987: Greenhouse Forcing’, Ann. Glaciol. 16, 127–133.
Hastenrath, S. and Ames, A.: 1995, ‘Diagnosing the Imbalance of Yanamarey Glacier in the Cordillera Bianca of Peru’, J. Geophys. Res. 100, 5105–5112.
Hastenrath, S.: 2001, ‘Variations of East African Climate during the Past Two Centuries’, Clim. Change 50, 209–217.
Kaser, G. and Georges, C.: 1997, ‘Changes of the Equilibrium-line Altitude in the Tropical Cordillera Bianca, Peru, 1930–1950, and their Spatial Variations’, Ann. Glaciol. 24, 344–349.
Kaser, G.: 1999, ‘A Review of the Modern Fluctuations of Tropical Glaciers’, Global Planet. Change 22, 93–103.
Kaser, G. and Georges, C.: 1999, ‘On the Mass Balance of Low Latitude Glaciers with Particular Consideration of the Peruvian Cordillera Bianca’, Geogr. Ann. 81A, 643–651.
Kousky, V. E. and Kayano, M. T.: 1994: ‘Principal Modes of Outgoing Longwave Radiation and 250 mb Circulation for the South American Sector’, J. Climate 7, 1131–1143.
Liebmann, B., Marengo, J. A., Glick, J. D., Kousky, V. E., Wainer, I. C., and Massambani, O.: 1998, ‘A Comparison of Rainfall, Outgoing Longwave Radiation and Divergence over the Amazon Basin’, J. Climate 11, 2898–2909.
Liu, X. and Chen, B.: 2000, ‘Climatic Warming in the Tibetan Plateau during Recent Decades’, Int. J. Clim. 20, 1729–1742.
Lucas, L. E., Waliser, D. E., Xie, P., Janowiak, J. E., and Liebmann, B.: 2001, ‘Estimating the Satellite Equatorial Crossing Time Biases in the Daily, Global Outgoing Longwave Radiation Dataset’, J. Climate 14, 2583–2605.
Morrissey, M. L.: 1986, ‘A Statistical Analysis of the Relationships among Rainfall, Outgoing Longwave Radiation and the Moisture Budget during January-March 1979’, Mon. Wea. Rev. 114, 931–942.
Morrissey, M. L. and Graham, N. E.: 1996, ‘Recent Trends in Rain Gauge Precipitation Measurements from the Tropical Pacific: Evidence for an Enhanced Hydrologic Cycle’, Bull. Amer. Meteorol. Soc. 77, 1207–1219.
New, M., Hulme, M., and Jones, P.: 2000, ‘Representing Twentieth-century Space-time Climate Variability. Part II: Development of 1901–1996 Monthly Grids of Terrestrial Surface Climate’, J. Climate 13, 2217–2238.
Peterson, T. C., Karl, T. R., Jamason, P. F., Knight, R., and Easterling, D. R.: 1998, ‘First Difference Method: Maximizing Station Density for the Calculation of Long-term Global Temperature Change’, J. Geophys. Res. 103, 25967–25974.
Quintana-Gomez, R. A.: 1999, ‘Trends of Maximum and Minimum Temperatures in Northern South America’, J. Climate 12, 2104–2112.
Ramirez, E., Francou, B., Ribstein, P., Desclitres, M., Guerin, R., Mendoza, J., Gallaire, R., Pouyaud, B., and Jordan, E.: 2001, ‘Small Glaciers Disappearing in the Tropical Andes: A Case Study in Bolivia: Glaciar Chacaltaya (16° S)’, J. Glaciol. 47, 187–194.
Ribstein, P., Tiriau, E., Francou, B., and Saravia, R.: 1995, ‘Tropical Climate and Glacier Hydrology: A Case Study in Bolivia’, J. Hydrol. 165, 221–234.
Ronchail, J.: 1995, ‘Variabilidad interanual de las precipitaciones en Bolivia’, Bull. Inst. fr. études andines 24, 369–378.
Rosenblüth, B., Fuenzalida, H. A., and Aceituno, P.: 1997, ‘Recent Temperature Variations in Southern South America’, Int. J. Clim. 17, 67–85.
Rossow, W. B. and Schiffer, R. A.: 1999, ‘Advances in Understanding Clouds from ISCCP’, Bull. Amer. Meteorol. Soc. 80, 2261–2287.
Thompson, L. G.: 2000, ‘Ice Core Evidence for Climate Change in the Tropics: Implications for Our Future’, Quat. Sci. Rev. 19, 19–35.
Trenberth, K. E.: 2002, ‘Changes in Tropical Clouds and Radiation’, Science 296, 2095a.
Villalba, R., Grau, H. R., Boninsegna, J. A., Jacoby, G. C., and Ripalta, A.: 1998, ‘Tree-ring Evidence for Long-term Precipitation Changes in Subtropical South America’, Int. J. Clim. 18, 1463–1478.
Vuille, M.: 1999, ‘Atmospheric Circulation over the Bolivian Altiplano during DRY and WET Periods and Extreme Phases of the Southern Oscillation’, Int. J. Clim. 19, 1579–1600.
Vuille, M. and Bradley, R. S.: 2000, ‘Mean Annual Temperature Trends and their Vertical Structure in the Tropical Andes’, Geophys. Res. Lett. 27, 3885–3888.
Vuille, M., Bradley, R. S., and Keimig, F.: 2000a, ‘Climatic Variability in the Andes of Ecuador and its Relation to Tropical Pacific and Atlantic Sea Surface Temperature Anomalies’, J. Climate 13, 2520–2535.
Vuille, M., Bradley, R. S., and Keimig, F.: 2000b, Tnterannual Climate Variability in the Central Andes and its Relation to Tropical Pacific and Atlantic Forcing’, J. Geophys. Res. 105, 12447–12460.
Vuille, M., Bradley, R. S., Werner, M., Healy, R., and Keimig, R: 2003a, ‘Modeling δ18O in Precipitation over the Tropical Americas, I: Interannual Variability and Climatic Controls’, J. Geophys. Res. 108 D6, 4174, doi: 10.1029/2001JD002038.
Vuille, M., Bradley, R. S., Healy, R., Werner, M., Hardy, D. R., Thompson, L. G., and Keimig, F.: 2003b, ‘Modeling δ18O in Precipitation over the Tropical Americas, II: Simulation of the Stable Isotope Signal in Andean Ice Cores’, J. Geophys. Res. 108 D6, 4174, doi: 10.1029/2001JD002039.
Wagnon, P., Ribstein, P., Francou, B., and Pouyaud, B.: 1999a, Annual Cycle of Energy Balance of Zongo Glacier, Cordillera Real, Bolivia’, J. Geophys. Res. 104, 3907–3923.
Wagnon, P., Ribstein, P., Kaser, G., and Berton, P.: 1999b, ‘Energy Balance and Runoff Seasonality of a Bolivian Glacier’, Glob. Plan. Change 22, 49–58.
Wagnon, P., Ribstein, P., Francou, B., and Sicart, J. E.: 2001, Anomalous Heat and Mass Budget of Glaciar Zongo, Bolivia, during the 1997–98 El Niño Year’, J. Glaciol. 47, 21–28.
Waliser, D. E., Graham, N. E., and Gautier, C.: 1993, ‘Comparison of the Highly Reflective Cloud and Outgoing Longwave Radiation Data Sets for Use in Estimating Tropical Deep Convection’, J. Climate 6, 331–353.
Waliser, D. E. and Zhou, W. R: 1997, ‘Removing Satellite Equatorial Crossing Time Biases from the OLR and HRC Datasets’, J. Climate 10, 2125–2146.
Weatherhead, E. C., Reinsel, G. C., Tiao, G. C., Meng, X. L., Choi, D., Cheang, W. K., Keller, T, DeLuisi, J., Wuebbles, D. J., Kerr, J. B., Miller, A. J., Oltmans, S. J., and Frederick, J. E.: 1998, ‘Factors Affecting the Detection of Trends: Statistical Considerations and Applications to Environmental Data’, J. Geophys. Res. 103, 17149–17161.
Wielicki, B. A., Wong, T, Allan, R. P., Slingo, A., Kiehl, J. T., Soden, B. J., Gordon, C. T., Miller, A. J., Yang, S. K., Randall, D. A., Robertson, R, Susskind, J., and Jacobowitz, H.; 2002, ‘Evidence for Large Decadal Variability in the Tropical Mean Radiative Energy Budget’, Science 295, 841–844.
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Vuille, M., Bradley, R.S., Werner, M., Keimig, F. (2003). 20th Century Climate Change in the Tropical Andes: Observations and Model Results. In: Diaz, H.F. (eds) Climate Variability and Change in High Elevation Regions: Past, Present & Future. Advances in Global Change Research, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-1252-7_5
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