A5029087977- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Pleistocene-Era Hominins and Archaeology
- Seismic Imaging and Inversion Techniques
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- Geological formations and processes
- Geological Studies and Exploration
- Cryospheric studies and observations
- Geological and Geophysical Studies Worldwide
- Paleontology and Stratigraphy of Fossils
- Archaeological and Geological Studies
- Archaeology and ancient environmental studies
- Geomagnetism and Paleomagnetism Studies
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Reservoir Engineering and Simulation Methods
- Marine and fisheries research
- Geological and Geochemical Analysis
- earthquake and tectonic studies
Universidad de Salamanca
2011-2025
University of Algarve
2016-2025
Portuguese Sea and Atmosphere Institute
2015-2022
College of Marin
2013-2017
University of South Florida St. Petersburg
2013-2017
University of South Florida
2013
Abstract The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating deposits SAM wind-driven currents in IODP cores from Maldives yields an age 12. 9 Ma indicating abrupt onset, over a short period 300 kyrs. This coincided with Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers onset upwelling reflected sediment’s content particulate organic matter. A weaker ‘proto-monsoon’ existed...
Abstract The Pliocene Epoch (∼5.3–2.6 million years ago, Ma) was characterized by a warmer than present climate with smaller Northern Hemisphere ice sheets, and offers an example of system in long‐term equilibrium current or predicted near‐future atmospheric CO 2 concentrations ( p ). A trend ice‐sheet expansion led to more pronounced glacial (cold) stages the end (∼2.6 Ma), known as “intensification Glaciation” (iNHG). We assessed spatial temporal variability ocean temperatures ice‐volume...
Abstract. A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over human actions as well potential environmental and climatic feedbacks. The geological record offers an opportunity to understand system response a forcings feedbacks which operate multiple temporal spatial scales. Here, we examine single interglacial during the late Pliocene (KM5c, ca. 3.205±0.01 Ma) when exceeded pre-industrial but were similar today lowest emission...
International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of Maldives Indian Ocean. The expedition set out to unravel timing Neogene climate changes, particular evolution South Asian monsoon and fluctuations sea level. these changes are assessed by dating resultant sedimentary alterations that mark stratigraphic turning points system. first four during early middle Miocene related sea-level changes. These reliably...
Abstract The progress of science is tied to the standardization measurements, instruments, and data. This especially true in Big Data age, where analyzing large data volumes critically hinges on being standardized. Accordingly, lack community‐sanctioned standards paleoclimatology has largely precluded benefits advances field. Building upon recent efforts standardize format terminology paleoclimate data, this article describes Paleoclimate Community reporTing Standard (PaCTS), a crowdsourced...
Abstract In this multiproxy study, we used new isotopic data on planktonic foraminifera to highlight the strong instability that characterized surface conditions in Iceland Basin during Marine Isotope Stage 11 (MIS 11). We produced oxygen isotope species Neogloboquadrina incompta and Turborotalita quinqueloba , foraminifera‐bound nitrogen N. calcareous nannofossil at coring site IODP Site U1314. The record displays two distinct upper ocean regimes: a relatively stable pre‐climate optimum an...
Global warming and unprecedented increase in CO2 urgently call for improved understanding of the climate system. The acceleration ice sheet sea melting, weakening Atlantic Meridional Overturning Circulation (AMOC) to a tipping point its collapse, observed anomalous distribution heat North region are severely contributing an intensification hazards (droughts, wildfires, storms floods) vulnerable regions. Understanding ocean-atmosphere dynamics role precipitation hydroclimate highly regions,...
Indian-Asian monsoon has oscillated between warm/wet interglacial periods and cool/dry glacial with periodicities closely linked to variations in Earth's orbital parameters. However, processes that control wet versus dry, i.e. aridity cyclical on the time-scale low latitudes of continent remain poorly understood because records over millions years are scarce. The sedimentary record from International Ocean Discovery Program (IODP) Expedition 359 provides a well-preserved, high-resolution,...
Abstract. The Maldives Archipelago (Indian Ocean), composed of two rows atolls that enclose an inner sea, offers excellent study site to explore the forcings carbonate production at platforms. Glacial–interglacial sea-level changes have been claimed be main factor controlling platform factories; however, climatic factors may also impact. In this work we used geochemical compositional records, obtained by X-ray fluorescence (XRF) core-scanning from International Ocean Discovery Program (IODP)...
Abstract Records of element ratios obtained from the Maldives Inner Sea sediments provide a detailed view on how Indian Monsoon System has varied at high-resolution time scales. Here, we present records International Ocean Discovery Program (IODP) Site U1471 based refined chronology through past 550,000 years. The record's high resolution and proper approach to set allowed us reconstruct changes in scale anomalies verify their relationships with established East Asian System. On basis Fe/sum...
The reduction in sea ice along the SE Greenland coast during last century has severely impacted ice-rafting to this area. In order reconstruct and oceanographic conditions area of Denmark Strait ~150 years, we conducted a multiproxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trough (~300 m water depth). proxy-based data obtained have been compared with historical instrumental gain better understanding sheet–ocean interactions A robust chronology developed based...
Abstract. Arctic freshwater discharges to the Labrador Sea from melting glaciers and sea ice can have a large impact on ocean circulation dynamics in North Atlantic, modifying climate deep water formation this region. In study, we present for first time high resolution record of rafting over last millennium assess effects region climate. The occurrence ice-rafted debris (IRD) was studied using sediments Site GS06-144-03 (57.29° N, 48.37° W; 3432 m depth). IRD fraction 63–150 µm shows...
Abstract The British Quaternary sequence has an exceptionally rich record of Palaeolithic archaeology up to 1 Ma. In this study, we reinvestigate foraminifera-based sea surface temperature (SST) reconstructions from the two marine core records (Ocean Drilling Program Site 980 and M23414) that are most relevant climatic history Isles, consequently allowing evolution SST over past Ma be studied. This is then compared with long-term changes archaeological in order understand greater detail...