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2. Non-stationary models for hydrological extremes in the mountain rivers of the Argentinean Central Andes.

Author

Lauro, Carolina, Vich, Alberto Ismael Juan, Rivera, Juan Antonio, and Moreiras, Stella Maris

Subjects
MODES of variability (Climatology), TIME series analysis, HYDROLOGIC models, WATER supply, STREAMFLOW
Abstract

The assessment of extreme hydrological events relies on the assumption that time series are independent and identically distributed. However, empirical evidence contradicts this assumption, indicating the presence of nonstationarity, including trends, step changes, or both, in the river records of the Argentinean Central Andes. This study proposes the use of generalized additive models in location, scale and shape (GAMLSS) to model the annual maximum and minimum flow of seven rivers. Firstly, the presence of trends and step changes was assessed. Subsequently, the models were formulated considering time and various climatic indices as covariates. The findings reveal declining trends and negative jumps over the past 50 to 70 years. The location parameters of the models exhibit linear or smoothing dependence with time or climate indices covariates. Different modes of climate variability are associated with hydrological extremes. The nonstationary models provide a novel complementary framework for water resource planning in the region. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Novel Cosmogenic Datings in Landslide Deposits, San Juan, Argentina

Author

Jeanneret, Pilar, Moreiras, Stella Maris, Merchel, Silke, Gärtner, Andreas, Binnie, Steven, Orgeira, Maria Julia, Aumaître, G., Bourlès, D., Keddadouche, K., Sassa, Kyoji, Series Editor, Vilímek, Vít, editor, Wang, Fawu, editor, Strom, Alexander, editor, Bobrowsky, Peter T., editor, and Takara, Kaoru, editor

Published
2021
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21. Cenozoic Orogenic Evolution of the Southern Central Andes (32–36°S)

Author

Giambiagi, Laura, Mescua, José, Bechis, Florencia, Hoke, Gregory, Suriano, Julieta, Spagnotto, Silvana, Moreiras, Stella Maris, Lossada, Ana, Mazzitelli, Manuela, Dapoza, Rafael Toural, Folguera, Alicia, Mardonez, Diego, Pagano, Diego Sebastián, Folguera, Andrés, editor, Naipauer, Maximiliano, editor, Sagripanti, Lucía, editor, C. Ghiglione, Matías, editor, Orts, Darío L., editor, and Giambiagi, Laura, editor

Published
2016
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27. Estudio morfotectónico del frente orogénico activo a la latitud de la ciudad de Mendoza (32O40’ - 33OS)

Author

Moreiras, Stella M., Toural Dapoza, Rafael, Moreiras, Stella M., and Toural Dapoza, Rafael

Abstract

El piedemonte mendocino (32º 50´S) se localiza en el frente orogénico activo de los Andes, donde se concentra la mayor deformación cuaternaria del país con sismos de magnitud mayor a 7 reportados desde 1575, lo que sitúa esta región dentro de la zona de mayor actividad sísmica histórica e instrumental de la república Argentina. En particular, esta región presenta condiciones únicas para los estudios neotectónicos de sismicidad de intraplaca ya que se ubica dentro del segmento de Flat Slab pampeano y se asocia a la subducción de la Dorsal de Juan Fernández lo que originan la ausencia de vulcanismo en este segmento. Tectónicamente, este sector refleja un cambio en el estilo de deformación donde aflora en particular la unidad morfoestructural de la Precordillera Sur que culmina a esta latitud. En este segmento, el frente orogénico activo se asocia a fallas inversas N-S que afectan niveles aluviales pleistocenos tardíos compuesto por una serie de fallas inversas con inclinación tanto hacia el Este como al Oeste y fallas transcurrentes de rumbo NO y ENE. Dichas fallas tienen registro de actividad holocénica (dentro de los últimos 10.000 años), aunque probablemente corresponden a fallas pliopleistocénicas reactivadas, algunas de ellas con registros de actividad sísmica histórica. Entre las potenciales fuentes sismogénicas encontramos las fallas Melocotón, Divisadero Largo y Cerro La Cal, el sistema compuesto de fallas Cerro de La Gloria y los anticlinales de Capdevilla-Borbollón..., The Mendoza piedmont (32º 50'S) is located in the active orogenic front of the Andes, where the largest Quaternary deformation of the country is concentrated with earthquakes of magnitude greater than 7reported since 1575, which places this region in a setting with the greatest historical and instrumental seismic activity in Argentina. In particular, this region presents unique conditions for neotectonic studies of intraplate seismicity since it is located within the Pampean Flat Slab segment and is associated with the subduction of the Juan Fernandez Ridge, which determines the absence of volcanism in this segment. Tectonically, this sector reflects a change in the deformation style where the morphostructural unit of the Southern Precordillera culminates at this latitude. In this segment, the active orogenic front is associated with N-S reverse faults affecting late Pleistocene alluvial levels composed of a series of east and west-dipping reverse faults and NW and ENE trending transcurrent faults. These faults have records of Holocene activity (within the last 10,000 years), although they probably correspond to reactivated Plio-Pleistocene faults, some of them with records of historical seismic activity. Potential seismogenic sources include the Melocotón, Divisadero Largo and Cerro La Cal faults, the Cerro de La Gloria composite fault system and the Capdevilla-Borbollón anticlines...

Published
2023

29. Patrones de variabilidad hidroclimática en los Andes centrales (30-37°S) de Argentina

Author

Lauro, Carolina, Vich, Alberto I.J., Rivera, Juan A., Otta, Sebastián, Moreiras, Stella Maris, Bastidas, Luis, and Vaccarino, Emilce

Subjects
Periodicity, Geografía, Forzantes climáticos, Flow, Argentina, Climatic forcing, Ciencias Naturales, Caudal, Precipitation, Periodicidad, Precipitación
Abstract

Los procesos hidroclimáticos se caracterizan por presentar ciclos que se repiten con una determinada frecuencia. En particular, la precipitación y el caudal de las cuencas de los Andes Centrales presentan una gran variabilidad interanual y decenal. Entender el origen de dichos ciclos nos permite conocer la influencia de diversos fenómenos en los componentes del ciclo hidrológico para mejorar la gestión de los recursos hídricos. El objetivo del presente estudio es identificar el rol de algunos de los forzantes climáticos en los modos de variabilidad de la precipitación y de los caudales, durante los últimos 60 años de registros en las cuencas de los ríos San Juan, Mendoza, Tunuyán, Diamante, Atuel, Grande y Barrancas, pertenecientes al sistema hidrográfico del río Colorado. Para detectar intervalos de tiempo-frecuencia en que dos series de tiempo tienen fuerte interacción, se realizó un análisis de coherencia de ondas entre las variables hidroclimáticas y diversos índices climáticos. En las series de precipitación y caudal de toda la región se encuentran correlaciones significativas entre con el índice oceánico de El Niño (ONI). Además, se identificaron ciclos de mayor intensidad en las bandas 2-8 años en el período comprendido entre 1970-2000, que explica la variabilidad de alta frecuencia en la precipitación y el caudal. En el caso de asociar las señales de baja frecuencia con el índice de la Oscilación Decenal del Pacífico (PDO), se identificó una coherencia significativa con el caudal en períodos de 8-16 años. Al sur de los 35°S se identifica una relación inversa con el índice del Modo Anular del Sur (SAM)., Hydroclimatic processes are characterized by cycles that repeat with a certain frequency. In particular, precipitation and streamflow in the the Central Andes basins show a large interannual and decadal scale variability. Understanding the origin of these cycles allows us to identify the influence of ocean-atmosphere circulation on the components of the hydrological cycle to improve the management of water resources. The aim of this study is to identify the main climatic forcings associated with the modes of variability of precipitation and streamflows during the last 60 years in the main Central Andean rivers (San Juan, Mendoza, Tunuyán, Diamante, Atuel, Grande, and Barrancas basins). A coherence analysis between hydroclimatic variables and various climate indices facilitates the detection of those frequencies where the two time series interact. Significant correlations exist between the Oceanic Niño Index (ONI), precipitation, and streamflow. Higher intensity cycles were identified in the 2-8 year bands in the period between 1970-2000, which explains the high-frequency variability in precipitation and streamflow. The Pacific Decadal Oscillation (PDO) and streamflow in decadal periods show a significant coherence detected in the San Juan, Mendoza, and Atuel River basins, whereas, streamflow and precipitations records located south 35°S reveal a negative relation with the Southern Annular Mode (SAM) index., Asociación Argentina de Geofísicos y Geodestas

Published
2022

31. Características de la avalancha de roca holocena que represa la laguna Atuel (34°S).

Author

ROSAS, Mario and Maris MOREIRAS, Stella

Abstract

Copyright of Revista de la Asociación Geológica Argentina is the property of Asociacion Geologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023

32. Lagos actuales represados por procesos de remoción en masa en los Andes Centrales de Argentina (31º - 36º S).

Author

CORREAS-GONZALEZ, Mariana, MOREIRAS, Stella M., and JEANNERET, Pilar

Abstract

Copyright of Revista de la Asociación Geológica Argentina is the property of Asociacion Geologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023

33. Geomorfología de la cuenca del río del Cobre, Malargüe, Mendoza (35°S): un aporte al entendimiento de la inestabilidad de laderas.

Author

Andrés ESPÓSITO, Maximiliano, Maris MOREIRAS, Stella, and CORREAS-GONZALEZ, Mariana

Abstract

Copyright of Revista de la Asociación Geológica Argentina is the property of Asociacion Geologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023

34. Evidencias de rupturas sucesivas del dique natural de la Laguna Blanca, Andes Centrales (31º S).

Author

JEANNERET, Pilar, Maris MOREIRAS, Stella, and CORREAS GONZALEZ, Mariana

Abstract

Copyright of Revista de la Asociación Geológica Argentina is the property of Asociacion Geologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023

40. Cenozoic Orogenic Evolution of the Southern Central Andes (32–36°S)

Author

Giambiagi, Laura, primary, Mescua, José, additional, Bechis, Florencia, additional, Hoke, Gregory, additional, Suriano, Julieta, additional, Spagnotto, Silvana, additional, Moreiras, Stella Maris, additional, Lossada, Ana, additional, Mazzitelli, Manuela, additional, Dapoza, Rafael Toural, additional, Folguera, Alicia, additional, Mardonez, Diego, additional, and Pagano, Diego Sebastián, additional

Published
2015
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46. Book of Abstracts - vDEUQUA2021

Author

Abadi, Mehrdad, Abbasi, Hamidreza, Abd El-Raouf, Amr, Abdulkarim, Mubarak, Adolph, Marie-Luise, Aeschbach, Werner, Akçar, Naki, Amini, Hamideh, Andreev, Andrej, Anselmetti, Flavio S., Aumaître, Georges, Avendaño Villeda, Diana, Bartz, Melanie, Baumhauer, Roland, Bazarradnaa, Enkhtuya, Bebiolka, Anke, Behling, Hermann, Benkaddour, Abdelfattah, Binot, Franz, Birlo, Stella, Bittner, Lucas, Bliedtner, Marcel, Bolland, Alexander, Bork, Hans-Rudolf, Bouaziz, Moncef, Bourlès, Didier, Brauer, Achim, Breuer, Sonja, Bromm, Tobias, Buechi, Marius W., Burghardt, Diana, Busch, Robert, Caballero, Margarita, Carr, Andrew S., Chapkanski, Stoil, Christl, Marcus, Cosac, Marian, Dal Corso, Marta, Daniel, Thomas, Dar, Reyaz, Dave, Aditi Krishna, De Jonge, Cindy, Deplazes, Gaudenz, Dietze, Elisabeth, Dietze, Michael, Dietzel, Martin, Dreibrodt, Stefan, Drysdale, Russell, du Plessis, Nadia, Dubois, Nathalie, Duller, Geoff, Duttmann, Rainer, Duval, Mathieu, Döhlert-Albani, Norman, Egli, Markus, Einwögerer, Thomas, Elbracht, Jörg, Enters, Dirk, Enzel, Yehouda, Ertlen, Damien, Farkas, Beáta, Fattahi, Morteza, Faust, Dominik, Faybishenko, Boris, Feistmantl, Nina, Fernandez, Philippe, Ferrier, Catherine, Fiedler, Sabine, Fischer, Birgit, Fischer, Peter, Fitzsimmons, Kathryn, Fletcher, William, Frechen, Manfred, Fuchs, Margret C., Fuchs, Markus, Fuelling, Alexander, Fábián, Szabolcs, Fülling, Alexander, Garbe, Philipp, Gebhardt, Catalina, Gegg, Lukas, Geis, Anna-Lena, Geitner, Clemens, Ghanbarian, Behzad, Gianotti, Franco, Gil Romera, Graciela, Glaser, Bruno, Glückler, Ramesh, Gresina, Fruzsina, Grootes, Pieter Meiert, Guadelli, Aleta, Guadelli, Jean-Luc, Guérin, Guillaume, Haas, Jean Nicolas, Haberzettl, Torsten, Hambach, Ulrich, Hardt, Jacob, Hein, Michael, Heinrich, Hartmut, Heinrich, Susann, Herzschuh, Ulrike, Heydari, Maryam, Hildebrandt, Dominic, Hirschmann, Philip, Hofmann, Felix Martin, Hofmann, Robert, Hogrefe, Ines, Huang, Jyh-Jaan Steven, Hunt, Allen, Händel, Marc, Ivy-Ochs, Susan, Jary, Zdzisław, Jeanneret, Pilar, Jöris, Olaf, Kalicki, Tomasz, Kamleitner, Sarah, Karaschewski, Jasmin, Keddadouche, Karim, Kehl, Martin, Kern, Zoltán, Kertscher, Cathleen, Khatooni, Darvish, Khosravichenar, Azra, Kipfer, Rolf, Kirchner, André, Kirleis, Wiebke, Klaes, Björn, Knitter, Daniel, Kolb, Thomas, Konstantinovski Puntos, Cyryl, Kreienbrink, Frauke, Kreutzer, Sebastian, Kulongoski, Justin, Laag, Christian, Labahn, Jakob, Lachner, Johannes, Lak, Razyeh, Lamb, Henry F., Lampe, Reinhard, Lang, Jörg, Lange-Athinodorou, Eva, Lauer, Tobias, Leanni, Laetitia, Leblanc, Jean-Claude, Lee, An-Sheng, Lehmkuhl, Frank, Lempe, Bernhard, Lerch, Marcel, Liou, Sofia Ya Hsuan, Lisa, Lenka, Liu, Zuorui, Lomax, Johanna, Lorenz, Sebastian, Lozano García, Socorro, Madarász, Balázs, Madritsch, Herfried, Maier, Andreas, Mangelsdorf, Kai, Markovic, Slobodan, Martinez Abarca, Luis Rodrigo, Marx, Samuel, May, Jan-Hendrik, Mayr, Christoph, Meister, Julia, Merchel, Silke, Meszner, Sascha, Meyer, Juliane, Mikdad, Abdeslam, Milevski, Ivica, Mir, Jehangeer, Mischke, Steffen, Mohammadi, Ali, Monegato, Giovanni, Moreiras, Stella, Mueller, Daniela, Muratoreanu, George, Müller, Daniela, Müller, Johannes, Nadeau, Marie-Josée, Nett, Janina, Neugebauer, Ina, Ng, Jessica, Nill, Leon, Nir, Nadav, Ohlendorf, Christian, Opp, Christian, Orgeira, Maria, Ortega Guerrero, Beatriz, Pasda, Clemens, Pasda, Kerstin, Penkman, Kirsty, Peric, Zoran, Pichat, Sylvain, Piller, Werner, Polgar, Irene, Prendergast, Amy, Preusser, Frank, Prud'homme, Charlotte, Pötter, Stephan, Quick, Lynne J., Rambeau, Claire, Reichert, Markus, Reimann, Tony, Reiss, Lilian, Roettig, Christopher-Bastian, Rolf, Christian, Russell, James, Ruszkiczay-Rüdiger, Zsófia, Ryzner, Kamila, Sahakyan, Lilit, Salazar, Gary, Salomon, Ferréol, Sardar Abadi, Mehrdad, Sarı, Selma, Scardia, Giancarlo, Schiestl, Robert, Schimmelpfennig, Irene, Schirmer, Wolfgang, Schmidt, Christoph, Schmidt, Johannes, Schmitt, Laurent, Schneider, Birgit, Schulte, Philipp, Schulze, Tabea, Schunke, Torsten, Schwab, Markus J., Schwahn, Lea, Schwamborn, Georg, Schwark, Lorenz, Schäfer, Dieter, Schütt, Brigitta, Seltzer, Alan, Selzer, Johnnes, Severinghaus, Jeffrey, Shah, Rayees, Simon, Ulrich, Sirakov, Nikolay, Sirakova, Svoboda, Sontag-González, Mariana, Sprafke, Tobias, Stahlschmidt, Mareike, Stauber, Theresa, Steier, Peter, Steiner, Martin, Stojakowits, Philipp, Strobel, Paul, Stroessner, Kathrin, Struck, Julian, Stute, Martin, Stutzriemer, Marika, Stäuble, Harald, Szidat, Sönke, Taneva, Stanimira, Tanner, David, ASTER, Team, Temovski, Marjan, Tinapp, Christian, Tjallingii, Rik, Trappe, Julian, Tylmann, Wojciech, Ulfers, Arne, Ullmann, Tobias, Urban, Brigitte, van Meer, Mike, Varga, György, Veres, Daniel, Verstraeten, Gert, Videiko, Michail, Vinnepand, Mathias, Vockenhuber, Christof, Vogel, Hendrik, Voigt, Silke, von Suchodoletz, Hans, Vött, Andreas, Weiß, Marcel, Werther, Lukas, Wolf, Daniel, Wonik, Thomas, Wrozyna, Claudia, Wunderlich, Tina, Zech, Michael, Zech, Roland, Zeeden, Christian, Zielhofer, Christoph, Zolitschka, Bernd, Zöller, Ludwig, Żurek, Krzysztof, von Suchodoletz, Hans, Dietze, Elisabeth, Dietze, Michael, Meister, Julia, Wrozyna, Claudia, Zeeden, Christian, Kreutzer, Sebastian, and Hildebrandt, Dominic

Subjects
Quaternary, Conference abstracts, Geoscience
Abstract

Collection of conference abstracts presented at the vDEUQUA2021 (2021-09-30 to 2021-09-01), the virtual meeting of the German Quaternary Association (DEUQUA).

Published
2021
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