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Federico Ferrelli, Melisa Pontrelli Albisetti, Andrea Soledad Brendel, Andrés Iván Casoni and Patrick Alan Hesp
In recent decades, there have been significant problems worldwide related to global warming and the intensification of extreme temperature and rainfall events. This research evaluated daily temperature and rainfall indices trends to identify whether warm...
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Diana Fernández,Luciana Giachetti,Sabine Stöhr,Ben Thuy,Damián Pérez,Marcos Comerio,Pablo Pazos
Pág. 421 - 432
The first articulated remains of ophiuroids for the Mesozoic of South America are described from the Lower Cretaceous of Neuquén Basin, Argentina. The taxonomic analysis allows the assignment of the material described herein to the extinct genus Ophiopet...
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Logan Clark and Ryan Fogt
The relationship between Southern Hemisphere middle and high-latitude regions has made it possible to generate observationally-based Antarctic pressure reconstructions throughout the 20th century, even though routinely collected observations for this con...
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SILVINA A. SOLMAN,MARIO N. NÚÑEZ,P. R. ROWNTREE
An evaluation of the Hadley Centre atmospheric general circulation model, HadAM2b, is presented, focusing on the ability of the model to simulate Southern Hemisphere (SH) transient disturbances. An assessment is also made of the effect of changing re...
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W. Jackson Davis, Peter J. Taylor and W. Barton Davis
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W. Jackson Davis, Peter J. Taylor and W. Barton Davis
We report a previously-unexplored natural temperature cycle recorded in ice cores from Antarctica?the Antarctic Centennial Oscillation (ACO)?that has oscillated for at least the last 226 millennia. Here we document the properties of the ACO and provide a...
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Frank M. Horwitz,Cameron Allan,Peter Brosnan,Pat Walsh
AbstractLabour market flexibility continues to be important for employers seeking to improve productivity, reduce costs and be competitively agile. But it also carries downside costs for employees of increased insecurity, potentially deteriorating employ...
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Frank M. Horwitz,Cameron Allan,Peter Brosnan,Pat Walsh
AbstractLabour market flexibility continues to be important for employers seeking to improve productivity, reduce costs and be competitively agile. But it also carries downside costs for employees of increased insecurity, potentially deteriorating employ...
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G. V. MÜLLER,T. AMBRIZZI
Based on previous observational studies on cold extreme events over southern South America, some recent studies suggest a possible relationship between Rossby wave propagation remotely triggered and the occurrence of frost. Using the concept of linear th...
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Augusto Nicolás Varela, María Sol Raigemborn, Patricio Emmanuel Santamarina, Sabrina Lizzoli, Thierry Adatte and Ulrich Heimhofer
The Cenomanian Mata Amarilla Formation (MAF) in southern Patagonia (~55° S paleolatitude, Austral-Magallanes Basin, Argentina) is composed mainly of stacked fluvial deposits with intercalated paleosols, which document Cenomanian environments at high-pale...
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José Luis Pinedo Vega,Carlos Ríos Martínez,Mario Molina Almaraz,J. Ignacio Dávila Rangel,Fernando Mireles García
Pág. 189 - 197
This work presents an assessment of the global and hemispheric total ozone mass and its interannual variations, using the total number of daily satellite measurements from the Total Ozone Mapping Spectrometer (TOMS) version 8 and Ozone Monitoring Instrum...
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Peng Fan, Jiangbo Jin, Run Guo, Guixian Li and Guangqing Zhou
Oceanic general circulation models (OGCMs) are important tools used to investigate mechanisms for ocean climate variability and predict the ocean change in the future. However, in most current ocean models, the impact of sea surface waves as one of the m...
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Rodrigo A. Otero,Sergio Soto-Acuña,Christian Salazar S.,José Luis Oyarzún
Pág. 237 - 267
Several Upper Cretaceous plesiosaur specimens recovered from southernmost Chile are described here. These were collected from upper levels of the Dorotea Formation exposed on three different localities (Sierra Baguales, Cerro Castillo, and Dumestre). The...
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MARÍA C. V. RAMÍREZ,MARY T. KAYANO,NELSON J. FERREIRA
Daily European Centre for Medium Range Weather Forecasts (ECMWF) analyses for the 1980-1989 period are used to study cyclonic vortices at the upper tropospheric levels (CVULs) in the vicinity of northeast Brazil. The occurrence of CVULs shows signific...
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Houraa Daher and Ben P. Kirtman
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Marta Pérez-Rodríguez, Olga Margalef, Juan Pablo Corella, Alfonso Saiz-Lopez, Sergi Pla-Rabes, Santiago Giralt and Antonio Martínez Cortizas
The study of mercury accumulation in peat cores provides an excellent opportunity to improve the knowledge on mercury cycling and depositional processes at remote locations far from pollution sources. We analyzed mercury concentrations in 150 peat sample...
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Diana Elizabeth Fernández,Damián Eduardo Pérez,Leticia Luci,Martín Alejandro Carrizo
Pág. 210 - 223
Asterozoans are free living, star-shaped echinoderms which are important components of benthic marine faunas worldwide. Their fossil record is, however, poor and fragmentary, probably due to dissarticulation of ossicles. In particular, fossil asteroids a...
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Shangfeng Chen, Bin Yu, Wen Chen and Renguang Wu
The El Niño–Southern Oscillation (ENSO) is the strongest interannual air–sea coupled variability mode in the tropics, and substantially impacts the global weather and climate. Hence, it is important to improve our understanding of the ...
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Mariel Ferrari
Pág. 291 - 301
The present paper aims at the description of two new species of Euthyneura (Heterobranchia: Gastropoda) in the Early Jurassic (early Pliensbachian) marine deposits of the Chubut Basin at southern Patagonia, Argentina. The new species Cossmannina australi...
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A. R. PERALTA HERNÁNDEZ,R. C. BALLING JR.,L. R. BARBA MARTÍNEZ
Studies from throughout much of the world have shown a general increase in extreme precipitation events over the past few decades, although most of these studies have focused on mid-to-high latitude land-based locations, particularly in the Northern H...
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