A5005307316- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Tree-ring climate responses
- Isotope Analysis in Ecology
- Venous Thromboembolism Diagnosis and Management
- Educational Innovations and Technology
- Archaeology and ancient environmental studies
- Species Distribution and Climate Change
- Evolution and Paleontology Studies
- Ultrasound in Clinical Applications
- Geological formations and processes
- Obstructive Sleep Apnea Research
- Marine Biology and Ecology Research
- E-Learning and Knowledge Management
- Geological and Geochemical Analysis
- Acute Myocardial Infarction Research
- Accounting and Financial Management
- Geological and Tectonic Studies in Latin America
- Digital literacy in education
- Peatlands and Wetlands Ecology
- Tracheal and airway disorders
- Respiratory Support and Mechanisms
- Methane Hydrates and Related Phenomena
- Coastal wetland ecosystem dynamics
- Sepsis Diagnosis and Treatment
University of Tarapacá
2022-2024
Instituto Ramón y Cajal de Investigación Sanitaria
2022-2024
Sociedad Española de Neumología y Cirugía Torácica
2023
Instituto Cajal
2022
Centro de Recursos Educativos Avanzados
2019-2021
Victoria University of Wellington
2014-2019
Institute of Ecology and Biodiversity
2012-2014
University of Chile
2012
We present detailed pollen and charcoal records from Lago Pichilafquén (~ 41°S) to decipher the effects of climate change varying disturbance regimes on composition structure vegetation Andean foothills northwestern Patagonia during last 2600 yr. Here, temperate rainforests have dominated landscape since cal yr BP with variations ranging cool-temperate wet north Patagonian relatively warm summer-drought-resistant Valdivian rainforests. interpret warm/dry conditions between 1900–2600, 690–750...
ABSTRACT We present a 16 000‐year vegetation and climate reconstruction from pollen plant macrofossil records obtained at small alpine lake in South Island, New Zealand (41°S). The expansion of lowland forest taxa suggests lifting the altitudinal limits because warming pulse between 13 10k cal BP 7 6k BP, while their decline relative to upland indicates cooling phases 10 7k over last 3000 years. modern treeline was first established locally by 9.7k BP. Forest persisted site until 3k then...
Regional vegetation, climate history, and local water table fluctuations for the past 14,600 years are reconstructed from pollen charcoal records of an ombrogenous peatbog in northern New Zealand (38°S). A long-term warming trend between 10,000 cal. yr BP is punctuated by two brief plateaux 14,200–13,800 13,500–12,000 BP. Periods relatively drier conditions inferred 14,000–13,400 12,000–10,000 BP, while a wet period observed 6000 The last 7000 feature stable temperatures, drying that...
Abstract. Modern precipitation anomalies in the Altiplano, South America, are closely linked to strength of American summer monsoon (SASM), which is influenced by large-scale climate features sourced tropics such as Intertropical Convergence Zone (ITCZ) and El Niño–Southern Oscillation (ENSO). However, timing, direction, spatial extent changes prior instrumental period still largely unknown, preventing a better understanding long-term drivers SASM their effects over Altiplano. Here we...
ABSTRACT We describe the stratigraphy, age, geochemistry and correlation of tephra from west to east across northern Patagonian Andes ( c . 40–41°S) with a view further refining eruptive history this region back onset Last Glacial Termination (~18 cal. ka). Eastwards Andes, rhyodacite rhyolitic markers dominantly Puyehue‐Cordón Caulle source are persistently recognised provide stratigraphic context for more numerously erupted intervening basalt basaltic–andesite composition. Tephra distal...
Abstract. The aim of this project was to establish past variations in the main oceanographic and climatic features a transitional semiarid ecosystem on north-central Chilean coast. We analyzed recent sedimentary records retrieved from two bays, Guanaqueros Tongoy (30∘ S), for geochemical biological analyses, including following: sensitive redox trace elements, biogenic opal, total organic carbon (TOC), diatoms stable isotopes nitrogen. Three remarkable periods were established with different...
We present a method for analysing subfossil plant cuticles preserved in peat and apply the to provide preliminary, coarse resolution reconstruction of Holocene vegetation history at Moanatuatua Bog, northern North Island, New Zealand. The cuticle record reveals early-Holocene development swamp its transition raised bog, which is not apparent from other proxies. Comparison with pollen same sequence highlights advantages analysis cases where hard identify or poorly preserved. In particular,...
Abstract Although present‐day precipitation variability in the southern Altiplano and adjacent Andean margins (15–25°S) is well understood, past drivers mechanisms remain little‐explored. We analyzed pollen assemblages of 31 fossil rodent middens to reconstruct change during most recent millennium highlands Atacama Desert (22°S), on western foothills Altiplano. Variations low high elevation types reveal reduced (increased) between 930 550 BP (510 440 BP) (BP = before present; taken as Common...
Abstract. Proxy records have long documented the existence of multicentury hydroclimate anomalies in Altiplano South America. However, causes and mechanisms these events are still largely unknown. Here we present results an innovative climate modelling experiment that explores oceanic drivers atmospheric conducive to long-term precipitation variability southern part (18–25° S). For doing so, performed 100-yr-long simulations using a regional model forced by climatological conditions resulted...
<b>Introduction:</b> Drug induced sleep endoscopy (DISE) or somnoscopy provides dynamic information about airway obstruction. This technique can be considered essential in the future for therapeutic management of certain patients with obstructive apnea (OSA). The aim this study was to describe main indications DISE and approach carried out. <b>Material Methods:</b> A prospective observational conducted analyzing characteristics undergoing as well post-procedure management. Quantitative...