GC010
Changes and impacts of climate variability in South America

Session ID#: 80771

Session Description:
Documenting climate variability in South American is important to better discern natural changes from external forcing due to global warming. The scarcity of observational climate data is a challenge to evaluate climate dynamics of the region and its connection to the global climate system. This session welcomes studies based on paleoclimate reconstructions and simulations of temperature and hydroclimatic variability over South America, as well as the assessment of climate change impacts on ecosystems and human populations. Increases in the frequency and intensity of extreme events, changes in the duration and spatial extent of the South American Monsoon, the Hadley Cell expansion, climate sensitivity of tropical trees, forest dieback, changes in the carbon cycle and reconstructions of El Niño Southern Oscillation, the Interdecadal Pacific Oscillation and past volcanic eruptions are just some examples of relevant topics. Presentations of new datasets, multidisciplinary methodological advances and novel educational outreach approaches are also welcome.
Co-Organized:
  • B - Biogeosciences
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
0476 Plant ecology [BIOGEOSCIENCES]
1616 Climate variability [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]

Primary Convener:  Laia Andreu-Hayles, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Conveners:  Valerie Daux, Université de Versailles Sant Quentin en Yvelines, Versailles, France, Milagros Rodríguez-Catón, Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States and Ernesto Tejedor Vargas, University at Albany State University of New York, Albany, NY, United States
Primary Liaison:  Laia Andreu-Hayles, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Intercomparison of Proxy Data and Model Simulations as Key to Understanding Internal Variability of the South American Monsoon System. (487638)
Rebecca Orrison, University at Albany State University of New York, Albany, NY, United States, Mathias F Vuille, University at Albany, State University of New York, Department of Atmospheric and Environmental Sciences, Albany, NY, United States, Jose L. P. S. Campos, IAG Institute of Astronomy, Geophysics and Atmospheric Sciences, Department of Atmospheric Sciences, Sao Paulo, Brazil and Francisco William Cruz Sr., Universidade de São Paulo, Instutit of geosciences, São Paulo, Brazil
 
Reconciling in-phase hydroclimate anomalies across the northern and southern tropical Andes during the Medieval Climate Anomaly and Little Ice Age (Invited) (491202)
Broxton W Bird, Indiana University Purdue University Indianapolis, Department of Earth Sciences, Indianapolis, IN, United States, Byron A Steinman, University of Minnesota Duluth, Department of Earth and Environmental Sciences and Large Lakes Observatory, Duluth, MN, United States, Jaime Escobar, Universidad del Norte, Barranquilla, Colombia, Alexander Correa-Metrio, Universidad Nacional Autonoma de Mexico, Departamento de Paleontología, Mexico City, Mexico and Pratigya J Polissar, Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Investigating Opposing 20th-Century Precipitation Trends in Chile and Argentina using Observations and Models (495018)
Arianna Marie Varuolo-Clarke, Stony Brook University, Stony Brook, NY, United States, Jason E Smerdon, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Park Williams, Lamont -Doherty Earth Observatory, Palisades, NY, United States
 
The South American Drivers of Megadroughts and Pluvials over the Past 600 years (497071)
Mariano S Morales1,2, Edward R Cook3, Jonathan Barichivich4, Duncan Christie4, Ricardo Villalba5, Carlos LeQuesne6, Ana Srur7, Fleur Couvreux Jr8, Mariano H Masiokas5, Alvaro Gonzalez-Reyes9, Eugenia Ferrero2, Vladimir Matskovsky10, Juan C Aravena11, Antonio Lara12, Rocio Beatriz Urrutia6, Ignacio A Mundo13, Ariel Muñoz14, Milagros Rodriguez Caton15,16, Lidio Lopez17, María del Rosario Prieto10, Facundo Rojas10, Lucas Bianchi10, Moises Rojas-Badilla4, Claudio Alvarez4, Brian Henry Luckman18, Jason E Smerdon19, David Lister20, Ian Harris20, Philip D Jones21, Emilio Bianchi22, Diego Aliste4, Gonzalo Velazquez4, Isabella Aguilera-Betti14, Jaime Argollo23 and Jose Boninsegna10, (1)Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina, (2)Instituto Argentino Nivologia, Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET, C.C. 330, 5500 Mendoza, Argentina, Mendoza, Argentina, (3)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (4)Instituto de Conservación-Biodiversidad y Territorio, Universidad Austral de Chile, Facultad de Ciencias Forestales y Recursos Naturales, Valdivia, Chile, (5)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (6)Universidad Austral, Valdivia, Chile, (7)El Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (8)Météo-France Toulouse, Toulouse Cedex 01, France, (9)Center for Climate and Resilience Research (CR)2, Valdivia, Chile, (10)Instituto Argentino de Nivologia, Glaciologia y Cs. Ambientales, Mendoza, Argentina, (11)Universidad de Magallanes, Gaia Antártica, Punta Arenas, Chile, (12)Laboratorio de Dendrocronología y Cambio Global, Instituto de Conservación, Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile, (13)Instituto Argentino Nivologia, Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET, Mendoza, Argentina, (14)Instituto de Geografía Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile, (15)nstituto Argentino Nivologia, Glaciología y Ciencias Ambientales (IANIGLA), CCT-CONICET, Mendoza, Argentina, (16)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, United States, (17)IANIGLA-CONICET, Mendoza, Argentina, (18)Univ Western Ontario, London, ON, Canada, (19)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (20)University of East Anglia, Norwich, United Kingdom, (21)Univ of East Anglia, Norfolk, United Kingdom, (22)Instituto Nacional de Tecnologia Agropecuaria, Bariloche, Argentina, (23)Instituto de Investigaciones Geologicas y del Medio Ambiente, Universidad Mayor de San Andres, La Paz, Bolivia
 
On the isotopic equilibrium between precipitation and water vapor in the Northern Patagonia during late summer 2017 and its consequences on δ18Ocellulose calculation (501679)
Tiphaine Penchenat1, Francoise Vimeux2, Valerie Daux3, Olivier Cattani1, Maximiliano Viale4, Ricardo Villalba4, Clément Outrequin5 and Ana Srur6, (1)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, (2)IRD, Gif-sur-Yvette Cedex, France, (3)Université de Versailles Sant Quentin en Yvelines, Versailles, France, (4)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (5)Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Aix-en-Provence, France, (6)El Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Power generation under uncertainty: the effects of changing hydrology and glacier melt through the 21stcentury in the Peruvian hydropower sector (501858)
Ana Caceres, Carnegie Mellon University, Engineering and Public Policy and Civil and Environmental Engineering, Pittsburgh, PA, United States, Paulina Jaramillo, Carnegie Mellon University, Pittsburgh, PA, United States, H. Scott Matthews, Carnegie Mellon University, Civil and Environmental Engineering and Engineering and Public Policy, Pittsburgh, PA, United States, Constantine Samaras, Carnegie Mellon University, Civil and Environmental Engineering, Pittsburgh, PA, United States and Bart Nijssen, University of Washington Seattle Campus, Seattle, WA, United States
 
Hydroclimatic variability in central Chile since the 13th century (513961)
Roberto Serrano-Notivoli, Spanish National Research Council, Zaragoza, Spain, Ernesto Tejedor Vargas, University at Albany State University of New York, Albany, NY, United States, Pablo Sarricolea Dr., University of Chile, Santiago, Chile, Oliver Meseguer-Ruiz Dr, Universidad de Tarapacá, Arica, Chile, Mathias F Vuille, University at Albany, State University of New York, Department of Atmospheric and Environmental Sciences, Albany, NY, United States, Magdalena Fuentealba, Pontificia Universidad Católica de Chile, Santiago, Chile and Martin de Luis, University of Zaragoza, Geography and Regional Planning, Zaragoza, Spain
 
Convergence in Growth Responses of Tropical Trees to Climate Driven by Water Stress (517544)
Lidio Lopez, IANIGLA-CONICET, Mendoza, Argentina, Milagros Rodriguez Caton, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, United States and Ricardo Villalba, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Multi-decadal changes in wet season precipitation totals over the eastern Amazon (Invited) (527454)
Daniela Granato de Souza1, David W Stahle1, Max Torbenson2, Ana Carolina Maioli Compos Barbosa3, Ian Howard1, Song Feng1, Jochen Schongart4, Lidio Lopez5 and Ricardo Villalba6, (1)University of Arkansas, Fayetteville, AR, United States, (2)The Ohio State University, Civil, Environmental and Geodetic Engineering, Ohio, OH, United States, (3)Federal University of Lavras, Lavras, Brazil, (4)INPA National Institute of Amazonian Research, Manaus, Brazil, (5)IANIGLA-CONICET, Mendoza, Argentina, (6)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Extreme droughts in northern Patagonia affects resilience in Austrocedrus chilensis forests (539944)
Eugenia Marcotti1, Mariano Amoroso2, Milagros Rodríguez-Catón3, Leticia Vega1, Ana Srur1 and Ricardo Villalba4, (1)El Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (2)Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Argentina, Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, Sede Andina, Universidad Nacional de Río Negro, El Bolson, Argentina, (3)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States, (4)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Coherence of Pan-American Precipitation and Tree Growth Extremes from 1772-2016 (543420)
David W Stahle1, Max Torbenson2, Daniela Granato-Souza3, Ian Howard4, Ana Carolina Maioli Compos Barbosa5, Song Feng1, Jochen Schongart6, Lidio Lopez7 and Ricardo Villalba8, (1)University of Arkansas, Fayetteville, AR, United States, (2)Ohio State University, Columbus, United States, (3)University of Arkansas, Fayetteville, United States, (4)University of Arkansas, Geosciences, Fayetteville, AR, United States, (5)Federal University of Lavras, Lavras, Brazil, (6)INPA National Institute of Amazonian Research, Manaus, Brazil, (7)IANIGLA-CONICET, Mendoza, Argentina, (8)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Imprints of Climate Signals in d18O Tree-Ring Record from the Hyper-Humid side of Southernmost South America, Tierra del Fuego (54.4°S) (559504)
Wolfgang Jens-Henrik Meier, Jussi Griessinger, Philipp Hochreuther and Mathias Braun, University of Erlangen-Nuernberg (FAU), Erlangen, Germany
 
Hadley Circulation Decadal Variability Impact on the Andes Precipitation over the Last 1500 years: IPSL-CM6A-LR model perspective. (576453)
Myriam Khodri1, Julián Villamayor1, Juan Antonio Rivera2, Elizabeth B. Naranjo2 and Valerie Daux3, (1)LOCEAN/IPSL, Sorbonne Universités, UPMC-CNRS-IRD-MNHN, Paris, France, (2)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (CCT-Mendoza/CONICET), Mendoza, Argentina, (3)Université de Versailles Sant Quentin en Yvelines, Versailles, France
 
Southern Westerlies and interannual climate variability as drivers of regional vegetation and fire history in southern South America (35-55°S) (576661)
William Nanavati1, Cathy L Whitlock2, Virginia Iglesias3, David B McWethy2 and Andres Holz4, (1)Bozeman, Montana, United States, (2)Montana State University, Bozeman, MT, United States, (3)University of Colorado at Boulder, Earth Lab, Boulder, CO, United States, (4)Portland State University, Portland, OR, United States
 
Climate Signals in Oxygen Isotopic Tree-ring Chronologies of Polylepis tarapacana from the South American Altiplano (581798)
Milagros Rodriguez Caton1, Laia Andreu-Hayles2, Mariano Morales3, Duncan Christie4, Claudio Alvarez4, Caroline Leland2, Mukund Palat Rao5, Rose Oelkers2, Valerie Daux6 and Ricardo Villalba7, (1)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, United States, (2)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)El Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (4)Instituto de Conservación-Biodiversidad y Territorio, Universidad Austral de Chile, Facultad de Ciencias Forestales y Recursos Naturales, Valdivia, Chile, (5)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (6)Université de Versailles Sant Quentin en Yvelines, Versailles, France, (7)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina
 
Changes in the Hadley cell descending branch and its impact on long-term precipitation variability in southwestern South America (583441)
Juan Antonio Rivera1, Elizabeth B. Naranjo1, Maximiliano Viale2, Julián Villamayor3, Myriam Khodri3, Valerie Daux4 and Gabriel Arnould5, (1)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (CCT-Mendoza/CONICET), Mendoza, Argentina, (2)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (3)LOCEAN/IPSL, Sorbonne Universités, UPMC-CNRS-IRD-MNHN, Paris, France, (4)Université de Versailles Sant Quentin en Yvelines, Versailles, France, (5)École Nationale de la Météorologie, Météo-France, Toulouse, France
 
Coupled megadrought risk in North and South America (594628)
Nathan John Steiger1, Jason E Smerdon2 and Park Williams1, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Evaluation of CMIP6 precipitation simulations during the last century along the Subtropical Central Andes (596069)
Gabriel Arnould1, Juan Antonio Rivera2, Elizabeth B. Naranjo2, Maximiliano Viale3, Julián Villamayor4, Myriam Khodri4 and Valerie Daux5, (1)École Nationale de la Météorologie, Météo-France, Toulouse, France, (2)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (CCT-Mendoza/CONICET), Mendoza, Argentina, (3)Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (4)LOCEAN/IPSL, Sorbonne Universités, UPMC-CNRS-IRD-MNHN, Paris, France, (5)Université de Versailles Sant Quentin en Yvelines, Versailles, France
 
Late quaternary vegetation and hydrological changes in the southeastern Amazon based on geochemical and pollen analyses (598019)
Renato Campello Cordeiro1, Gabriel Souza Martins2, Bruno Turcq3, Ioanna Bouloubassi4, Daiana Fontes2, Philip A Meyers5, Luciane Silva Moreira1, Renato de Aragão Ribeiro Rodrigues6, Mercedes Mendes7, Abdelfettah Sifeddine2 and Hermann Behling8, (1)Universidade Federal Fluminense, Niteroi, Brazil, (2)UFF Federal Fluminense University, Niteroi, Brazil, (3)IRD, Bondy, France, (4)LOCEAN, University P. M. Curie, Paris, Cedex 05, France, (5)Univ Michigan, Ann Arbor, MI, United States, (6)EMBRAPA Brazilian Agricultural Research Corportation, Embrapa Solos, Rio de Janeiro, Brazil, (7)Institut de recherche pour le développement, Bondy, France, (8)University of Göttingen, Göttingen, Germany
 
Climate sensitivity in radial growth of the northernmost population of Polylepis tarapacana in the Peruvian Andes (605589)
Doris Bianca Crispin1, Mariano Morales2, Laia Andreu-Hayles3, Janet Inga Guillena1, Duncan Christie4 and Edilson Jimmy Requena-Rojas1, (1)Universidad Continental, Huancayo, Peru, (2)El Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Mendoza, Argentina, (3)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (4)Instituto de Conservación-Biodiversidad y Territorio, Universidad Austral de Chile, Facultad de Ciencias Forestales y Recursos Naturales, Valdivia, Chile
 
The fast response of South America Summer Monsoon to ice-rafted detritus deposition in the western subtropical North Atlantic (611916)
Nicolas M Strikis, Universidade Federal Fluminense, Niteroi, Brazil, Francisco William Cruz Sr., Universidade de São Paulo, Instutit of geosciences, São Paulo, Brazil, Eline A Barreto, Universidade de Sao Paulo, Sao Paulo, SP, Brazil, Filipa Naughton, IPMA, Porto, Portugal, Mathias F Vuille, University at Albany, State University of New York, Department of Atmospheric and Environmental Sciences, Albany, NY, United States, Hai Cheng, University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, Antje H L Voelker, IPMA, Lison, Portugal, Haiwei Zhang, Xi'an Jiaotong University, Institute of Global Environmental Change, Xi'an, China, Ivo Karmann, USP University of Sao Paulo, Sedimentary and Environmental Geology Department, São Paulo, Brazil, R. Lawrence Edwards, Nanjing Normal University, Dept. of Geography, Nanjing, China, Augusto S Auler, Universidade Federal de Minas Gerais, CPMTC, Instituto de Geociencias, Belo Horizonte, Brazil, Roberto Ventura Santos, UNB University of Brasilia, Brasilia, Brazil and Hamilton Reis Sales Sr, Instituto Federal do Norte de Minas Gerais, Januária, Brazil
 
Tropospheric temperature control and its effect on precipitation on the northern coast of Peru (617550)
José Obregón1,2, Ken Takahashi3, Fiorela Castillón Lucas1,4, Pedro Rau1, Daniel Vicente Horna Munoz1 and Eli Tziperman5, (1)Water Research and Technology Centre CITA, Universidad de Ingeniería y Tecnología UTEC, Lima, Peru, Lima, Peru, (2)Department of Physics, Meteorology and Environmental Engineering, Universidad Nacional Agraria La Molina UNALM, Lima, Peru, Lima, Peru, (3)Servicio Nacional de Meteorología e Hidrología, Lima, Peru, (4)Department of Physics, Meteorology and Environmental Engineering, Universidad Nacional Agraria La Molina UNALM, Lima, Peru., Lima, Peru, (5)Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA., Cambridge, MA, United States
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