Article
Geography, Physical
Gonzalo Jimenez-Moreno, Oliver Heiri, Antonio Garcia-Alix, R. Scott Anderson, Francisco J. Jimenez-Espejo, Charo Lopez-Blanco, Laura Jimenez, Carmen Perez-Martinez, Marta Rodrigo-Gamiz, Alejandro Lopez-Aviles, Jon Camuera
Summary: Obtaining accurate temperature reconstructions from the past is crucial in understanding natural temperature changes and evaluating anthropogenic global warming. This study presents a detailed Holocene temperature reconstruction based on chironomid assemblages, revealing significant cooling during the Middle and Late Holocene. The current climate warming exceeds future projections, posing a threat to alpine environments and biodiversity.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Brittany N. Price, Nathan D. Stansell, Alfonso Fernandez, Joseph M. Licciardi, Alia J. Lesnek, Ariel Munoz, Mary K. Sorensen, Edilia Jaque Castillo, Tal Shutkin, Isabella Ciocca, Ianire Galilea
Summary: The development of robust chronologies of Neoglaciation in the high-altitude Andes can provide valuable insights into regional climate variability and aid in predicting future changes. Unfortunately, records of Late Holocene glaciation in the Central Chilean Andes are limited. In this study, we used a combination of dating techniques to establish a chronology of glacier fluctuations and found evidence of coeval climate variability between the middle and high southern latitudes during the Late Holocene.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geography, Physical
Gonzalo Jimenez-Moreno, Alejandro Lopez-Aviles, Antonio Garcia-Alix, Maria J. Ramos-Roman, Jon Camuera, Jose Manuel Mesa-Fernandez, Francisco J. Jimenez-Espejo, Charo Lopez-Blanco, Jose S. Carrion, R. Scott Anderson
Summary: This study investigates the sedimentary record from Sierra Nevada to understand the response of forests and lake environments to climate changes and human impact. The research reveals the paleoenvironmental and paleoclimatic information from the late Pleistocene to the Holocene, indicating the importance of human activities in shaping the landscape.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Multidisciplinary Sciences
Oscar Lisi, Anisbeth Daza, Rosana Londono, Sigmer Quiroga
Summary: This study investigated tardigrades in the Sierra Nevada de Santa Marta in Colombia, and identified 27 species. A new species, Mixibius gibbosus, was discovered. Additionally, three species were recorded for the first time in Colombia, and one was recorded for the first time outside of Ecuador.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2022)
Article
Geosciences, Multidisciplinary
Helen W. Beeson, Scott W. Mccoy
Summary: The timing, rates, and spatial patterns of elevation change in the Sierra Nevada are analyzed in this study using fluvial geomorphology measures and landscape evolution modeling. The results suggest that westward-draining rivers in the Sierra Nevada are in a disequilibrium state due to significant down-to-the-west tilting in the last 11 million years. The study also finds that surface uplift from late Cenozoic tilting appears to have been similar along strike and heavily modulated by lithology and drainage area exchange.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geography, Physical
Alejandro Lopez-Aviles, Antonio Garcia-Alix, Gonzalo Jimenez-Moreno, R. S. Anderson, Jaime L. Toney, Jose M. Mesa-Fernandez, Francisco J. Jimenez-Espejo
Summary: Various organic and inorganic geochemical analyses were conducted in the sedimentary record of the Borreguil de los Lavaderos de la Reina in the southern Iberian Peninsula. This study revealed an overall aridification trend and reduction in aquatic environments over the past 2700 years, driven by insolation and North Atlantic Oscillation trends. The environmental evolution of BdlR-03 can be divided into four phases, showing fluctuations in precipitation and climate conditions influenced by human activities and natural factors.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
H. W. Beeson, S. W. McCoy
Summary: The author responded to Gabet's criticisms and defended their interpretation of migrating knickpoints in the Sierra and their estimates of surface uplift. They used systematic topographic analysis and various methods to identify consistent trends of uplift timing and magnitude along the length of the range. Although pinpointing the timing of the most recent tectonic event is challenging, they argue that the uncertain estimate is valuable for understanding the tectonic history of the Sierra.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geography, Physical
Alexey Lupachev, Stanislav Gubin
Summary: One of the most important problems in cryopedology is the interaction between pedogenic processes and the formation of near-surface permafrost. The characteristics of the soil-permafrost system, such as thickness, structure, spatial variability, etc., determine its response to bioclimatic fluctuations and anthropogenic pressure. The soil profile and upper layers of permafrost together form the natural body of the soil-cryogenic complex, which is the result of coevolution during the late Pleistocene-Holocene. Pedogenic and cryogenic processes contribute to the formation of organic-accumulative horizons above the permafrost table in Cryosols in the Arctic. The long-term study of cryogenic soils developed on underlying permafrost improves our understanding of the natural-historical body-soil-cryogenic complex.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Geosciences, Multidisciplinary
Cristhian Gomez, Andreas Kammer, Matthias Bernet, Alejandro Piraquive, Albrecht von Quadt
Summary: This study presents a sedimentological and stratigraphical analysis of the Upper Triassic Los Indios and Corual formations, revealing the deposition of coarse-grained delta deposits and offshore deposits in a back-arc extension setting. The volcanic rocks interbedded with sedimentary deposits show a bimodal basic-acid volcanism with back-arc affinity, marking the development of the NW Gondwana margin during the Late Triassic and Early to Middle Jurassic.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geography, Physical
Christopher S. Cooper, David F. Porinchu, Scott A. Reinemann, Bryan G. Mark, James Q. DeGrand
Summary: Analyses of sediment core from Stella Lake in Nevada provided a 2000-year record of fire history and vegetation change for the Great Basin. Fire activity was minimal from the beginning of the first millennium to AD 750, but increased slightly at the onset of the Medieval Climate Anomaly. Major fire events during the Little Ice Age significantly influenced vegetation change in the catchment area.
QUATERNARY RESEARCH
(2021)
Article
Geography, Physical
Kevin M. Theissen, James B. Paces
Summary: Lacustrine carbonates from Lower Pahranagat Lake in southern Nevada contain Sr and U isotopes that reveal past variations in water sources and hydrologic conditions. The compositions of these isotopes indicate mixtures of local volcanic aquifer water and regional carbonate aquifer water since the mid-Holocene. Around 5.3-5.2 ka, there was a significant increase in surface flow from high-volume springs discharging from the carbonate aquifer to the north.
QUATERNARY RESEARCH
(2023)
Article
Geography, Physical
Yoshiaki Suzuki, Ryuji Tada, Kana Nagashima, Takeshi Nakagawa, Katsuya Gotanda, Tsuyoshi Haraguchi, Gordon Schlolaut
Summary: Through the recording of light gray event layers (GELs) in the sediment of Lake Suigetsu in Central Japan, researchers aim to reconstruct the frequency and magnitude of flood events over the past 8000 years. The study revealed changes in the thickness of GELs over time, indicating the occurrence of extreme flood events. Different temporal variations were observed in the frequency and magnitude of extreme flood-origin event layers (EFELs), with potential explanations linked to shifts in westerly jet and monsoon fronts.
Article
Geography, Physical
Marie-Noelle Guilbaud, Jesus Alcala-Reygosa, Irene Schimmelpfennig, Jose Luise Arce
Summary: Despite the challenges in dating young volcanic deposits and landforms, accurate dating is crucial for evaluating hazards and predicting future volcanic activity. In this study, multiple dating techniques were used to verify the age of a significant eruption, and it was found that radiocarbon dating of paleosols and in-situ Cl-36 exposure dating were effective methods.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Diane Clemens-Knott, Michelle Gevedon
Summary: Quantitative modeling of discordant detrital zircon U-Pb isotope data from the northern El Paso terrane reveals metamorphosed Laurentian passive margin strata within the Kern Plateau (southeastern Sierra Nevada), resolving a 40-year long debate regarding this terrane's origin. New U-Pb-Hf isotope data from plutons intruding the Kern Plateau shear zone are virtually identical to published data from the El Paso Mountains, indicating that the Sierra Nevada- Mojave arc initiated in the late Early Permian (ca. 274 Ma) and was active into the Middle Triassic (ca. 240 Ma).
Article
Meteorology & Atmospheric Sciences
Josep Bonsoms, Sergi Gonzalez, Marc Prohom, Pere Esteban, Ferran Salvador-Franch, Juan I. Lopez-Moreno, Marc Oliva
Summary: The study on snow patterns in the Catalan Pyrenees reveals significant differences in snowfall amount between the western and eastern regions, while snow melting time is primarily influenced by elevation. Atlantic low-pressure systems bring more abundant new snow in most snow stations, with different advection patterns in autumn, winter, and spring. Atmospheric circulation is mainly influenced by the East Atlantic/West Russia and Western Mediterranean Oscillation teleconnection patterns.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Geography, Physical
M. Oliva, M. Fernandes, D. Palacios, J-M Fernandez-Fernandez, I Schimmelpfennig, D. Antoniades, Georges Aumaitre, Didier Bourles, Karim Keddadouche
Summary: The study reveals the deglaciation process of the Baciver Cirque in the Late Pleistocene, showing that the ice thickness may have reached 200 meters during the maximum ice extent. Rapid glacial retreat occurred around 15,000 years ago during the Belling-Allered Interstadial, leading to the complete deglaciation of the cirque in a few centuries and the transformation into debris-covered and rock glaciers.
Article
Environmental Sciences
Marcelo Fernandes, Marc Oliva, Goncalo Vieira, David Palacios, Jose Maria Fernandez-Fernandez, Magali Delmas, Julia Garcia-Oteyza, Irene Schimmelpfennig, Josep Ventura, Aster Team
Summary: This study examines the terminal moraine complex of the Upper Garonne Basin in the Pyrenees during the Late Pleistocene, using geomorphological observations and Be-10 Cosmic-Ray Exposure (CRE) ages. The study reveals the timing of the maximum glacial extent, onset of deglaciation, and provides evidence of glacier retreat during the Last Glacial Maximum. Furthermore, it introduces the first CRE ages in the Pyrenees for the glacial advance occurred during the Penultimate Glacial Cycle (PGC).
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geography, Physical
M. Fernandes, M. Oliva, G. Vieira, D. Palacios, J. M. Fernandez-Fernandez, J. Garcia-oteyza, I. Schimmelpfennig, Aster Team, D. Antoniades
Summary: This study in the Upper Garonne Basin presents new geomorphological observations and a dataset of exposure ages, offering a reconstruction of the timeline of the last deglaciation in the Pyrenees. It reveals detailed information about glacial fluctuations, providing insights into the retreat and formation of glaciers.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geography, Physical
Luis M. Tanarro, David Palacios, Jose M. Fernandez-Fernandez, Nuria Andres, Marc Oliva, Manuel Rodriguez-Mena, Irene Schimmelpfennig, Skafti Brynjolfsson, Thorsteinn Saemundsson, Jose J. Zamorano, Jose Ubeda
Summary: This study focuses on the transformation process of debris-free mountain glaciers into debris-covered glaciers and rock glaciers in the Hofsdalur valley, northern Iceland. The results show that the glaciers in the study area followed a similar evolution pattern to other cirques in the Trollaskagi peninsula, with retreat dynamics and cirque floor elevation influencing the subsequent glacial evolution. Ice-cored landforms have survived above the lower permafrost limit, while debris-free glaciers have been observed during the Late Holocene in higher altitude cirques.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
J. Garcia-Oteyza, M. Oliva, D. Palacios, J. M. Fernandez-Fernandez, I. Schimmelpfennig, N. Andres, D. Antoniades, H. H. Christiansen, O. Humlum, L. Leanni, V. Jomelli, J. Ruiz-Fernandez, V. Rinterknecht, T. P. Lane, K. Adamson, Georges Aumaitre, Didier Bourles, Karim Keddadouche
Summary: This study investigates the deglaciation process and origin of landforms in Zackenberg Valley, Northeast Greenland. Through extensive fieldwork and geomorphological mapping, researchers identified different types of landforms and used cosmic-ray exposure dating to determine their ages. The results reveal that the valley was once filled with a glacier over 800 meters thick, which gradually retreated and left behind lateral moraines. The last remnants of glacial ice disappeared from the valley floor around 10.5 thousand years ago.
Article
Geography, Physical
Javier Santos-Gonzalez, Rosa Blanca Gonzalez-Gutierrez, Jose Maria Redondo-Vega, Amelia Gomez-Villar, Vincent Jomelli, Jose M. Fernandez-Fernandez, Nuria Andres, Jose M. Garcia-Ruiz, Sergio Alberto Pena-Perez, Adrian Melon-Nava, Marc Oliva, Javier Alvarez-Martinez, Joanna Charton, David Palacios
Summary: This research analyzes the deglaciation process in the Muxiven Cirque and discovers the formation of rock glaciers after the retreat of glaciers. These findings are significant for understanding the glacial geomorphology evolution in the Iberian Peninsula.
Article
Geography
M. Fernandes, M. Oliva, G. Vieira, L. Lopes
Summary: The geomorphological map covers 553 km2 of the Aran Valley and identifies 44 different geomorphological units, mainly reflecting geological evidence of past glacial activities. Following deglaciation, the landscape was reshaped by periglacial, slope, alluvial, and fluvial processes.
Article
Environmental Sciences
Marc Oliva, David Palacios, Jose M. Fernandez-Fernandez, Marcelo Fernandes, Irene Schimmelpfennig, Goncalo Vieira, Dermot Antoniades, Augusto Perez-Alberti, Julia Garcia-Oteyza
Summary: This study reconstructs the glacial history of the Fildes Peninsula in the northern Antarctic Peninsula. It reveals that the deglaciation occurred during the Holocene Thermal Maximum and was followed by glacial expansion under favorable climate conditions. The results contribute to a better understanding of the peninsula's Holocene geoecological dynamics.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Environmental Sciences
Julia Garcia-Oteyza Ciria, Marc Oliva, David Palacios, Jose M. Fernandez-Fernandez, Irene Schimmelpfennig, Alicia Medialdea, Marcelo Fernandes, Santiago Giralt, Vincent Jomelli, Dermot Antoniades
Summary: By reconstructing the glacial behavior and deglaciation process in Northeast Greenland, this study reveals that the glaciers in the area experienced intermittent retreats and advances during the last millennia, and eventually reached a stable state. The findings provide new evidence for the relative stability of the Greenland Ice Sheet and regional ice caps in the area.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Environmental Sciences
Sergi Gonzalez-Herrero, David Barriopedro, Ricardo M. Trigo, Joan Albert Lopez-Bustins, Marc Oliva
Summary: In February 2020, the Antarctic Peninsula experienced anomalously warm temperatures and one of the most intense heatwaves ever recorded, with the intensity of the heatwave increasing by approximately 25% compared to the past, largely due to the long-term warming of the Antarctic Peninsula.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Classics
Marc Mayer i Olive
Summary: This paper analyzes the role of Equitius, a controversial figure in Roman history, as a case of sebastianism during a critical period of the Roman res publica. By reexamining historical sources from this perspective, new insights are gained about the events that occurred during that time of political crisis.
RIVISTA STORICA DELL ANTICHITA
(2021)
Article
Geography, Physical
Filip Hrbacek, Goncalo Vieira, Marc Oliva, Megan Balks, Mauro Guglielmin, Miguel Angel de Pablo, Antonio Molina, Miguel Ramos, Gabriel Goyanes, Ian Meiklejohn, Andrey Abramov, Nikita Demidov, Dmitry Fedorov-Davydov, Alexey Lupachev, Elizaveta Rivkina, Kamil Laska, Michaela Knazkova, Daniel Nyvlt, Rossana Raffi, Jorge Strelin, Toshio Sone, Kotaro Fukui, Andrey Dolgikh, Elya Zazovskaya, Nikita Mergelov, Nikolay Osokin, Vladislav Miamin
Summary: Monitoring under the CALM-S program has been conducted at multiple sites across Antarctica to study active layer thawing depth and thickness, revealing spatial and temporal variability in the active layer depth in different regions of Antarctica. The study highlights the need for continued monitoring and expansion to enhance understanding of the thermal properties of Antarctic soil.
Article
Plant Sciences
Cristobal Araneda, Jose Maria Fernandez, Marc Oliva, Gotz Palfner, Angelica Casanova-Katny
Summary: The study found that the vegetation on Deception Island is mainly composed of 15 moss species and 2 liverworts, with Sanionia uncinata and Potytrichastrum alpinum dominating the moss carpets. Additionally, a new moss site associated with the penguin rookery was discovered, showcasing a unique community differentiation in the area.
Meeting Abstract
Sport Sciences
Stephen P. Sayers, Trent M. Guess, Jamie B. Hall, Kyle Gibson, Jeffrey Adams, Marc Olive, Phil Nelson, James Kern
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2021)
