A5065074754- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Archaeology and ancient environmental studies
- Pleistocene-Era Hominins and Archaeology
- Marine and environmental studies
- Geological formations and processes
- Oceanographic and Atmospheric Processes
- Hydrocarbon exploration and reservoir analysis
- Maritime and Coastal Archaeology
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Tree-ring climate responses
- Marine and coastal ecosystems
- Karst Systems and Hydrogeology
- Climate variability and models
- Marine Biology and Ecology Research
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Groundwater and Isotope Geochemistry
- Astro and Planetary Science
- Water Quality Monitoring and Analysis
- Archaeological and Geological Studies
- Paleontology and Stratigraphy of Fossils
- Mediterranean and Iberian flora and fauna
Institute of Environmental Assessment and Water Research
2015-2024
University of Cambridge
2007-2019
Charles River Laboratories (Netherlands)
2017
Consejo Superior de Investigaciones Científicas
2004-2016
Unidades Centrales Científico-Técnicas
2015
National Research Council
2008
Instituto de Investigaciones Químicas y Ambientales de Barcelona
2007
British Antarctic Survey
2007
University of Bern
2007
Universitat de Barcelona
2004
Centennial climate variability over the last ice age exhibits clear bipolar behavior. High-resolution analyses of marine sediment cores from Iberian margin trace a number associated changes simultaneously. Proxies sea surface temperature and water mass distribution, as well relative biomarker content, demonstrate that this typical north-south coupling was pervasive for cold phases during past 420,000 years. Cold episodes after relatively warm largely ice-free periods occurred when...
Interglacials, including the present (Holocene) period, are warm, low land ice extent (high sea level), end-members of glacial cycles. Based on a level definition, we identify eleven interglacials in last 800,000 years, result that is robust to alternative definitions. Data compilations suggest despite spatial heterogeneity, Marine Isotope Stages (MIS) 5e (last interglacial) and 11c (~400 ka ago) were globally strong (warm), while MIS 13a (~500 was cool at many locations. A step change...
A continuous high-resolution Western Mediterranean sea surface temperature (SST) alkenone record spanning the past 250,000 years shows that abrupt changes were more common at warming than cooling. During marine isotope stage (MIS) 6, SST oscillated following a stadial-interstadial pattern but lower intensities and rates of change in Dansgaard/Oeschger events MIS 3. Some most prominent occurred over MISs 5 7, after prolonged warm periods high stability. Climate during whole period was...
Abstract Reproducible climate reconstructions of the Common Era (1 CE to present) are key placing industrial-era warming into context natural climatic variability. Here we present a community-sourced database temperature-sensitive proxy records from PAGES2k initiative. The gathers 692 648 locations, including all continental regions and major ocean basins. trees, ice, sediment, corals, speleothems, documentary evidence, other archives. They range in length 50 2000 years, with median 547...
The Last Interglacial (LIG) represents an invaluable case study to investigate the response of components Earth system global warming. However, scarcity absolute age constraints in most archives leads extensive use various stratigraphic alignments different reference chronologies. This feature sets limitations accuracy assignment climatic sequence events across globe during LIG. Here, we review strengths and methods that are commonly used date or develop chronologies for time span (∼140–100...
X-ray fluorescence (XRF) core scanning and computed tomography data were measured every 1 mm to study the structure of Heinrich Event during last deglaciation at International Ocean Discovery Program Site U1308. Layer comprises two distinct layers ice-rafted detritus (IRD), which are rich in detrital carbonate (DC) poor foraminifera. Each DC layer consists poorly sorted, coarse-grained clasts IRD embedded a dense, fine-grained matrix glacial rock flour that is partially cemented. The...
Abstract Considerable ambiguity remains over the extent and nature of millennial/centennial-scale climate instability during Last Interglacial (LIG). Here we analyse marine terrestrial proxies from a deep-sea sediment sequence on Portuguese Margin combine results with an intensively dated Italian speleothem record climate-model experiments. The strongest expression variability occurred transitions into out LIG. Our records also document series multi-centennial intra-interglacial arid events...
We produced a composite depth scale and chronology for Site U1385 on the SW Iberian Margin. Using log(Ca/Ti) measured by core scanning XRF at 1-cm resolution in all holes, section was constructed to 166.5 meter (mcd) that corrects stretching squeezing each core. Oxygen isotopes of benthic foraminifera were correlated stacked δ18O reference signal (LR04) produce an oxygen isotope stratigraphy age model. Variations sediment color contain very strong precession signals U1385, amplitude...
This paper reviews the methodological and practical issues relevant to ways in which natural scientists, historians archaeologists may collaborate study of past climatic changes Mediterranean basin. We begin by discussing methodologies these three disciplines context consilience debate, that is, attempts unify different research address similar problems. demonstrate there are a number similarities fundamental methodology between history, archaeology, sciences deal with ("palaeoenvironmental...
Abstract. Characterizing the temporal uncertainty in palaeoclimate records is crucial for analysing past climate change, correlating events between records, assessing periodicities, identifying potential triggers and evaluating model simulations. The first global compilation of speleothem isotope by SISAL (Speleothem Isotope Synthesis Analysis) working group showed that age uncertainties are not systematically reported published literature, these only available a limited number (ca. 15 %,...
Abstract. Reconstructions of global hydroclimate during the Common Era (CE; past ∼2000 years) are important for providing context current and future environmental change. Stable isotope ratios in water quantitative indicators on regional to scales, these signals encoded a wide range natural geologic archives. Here we present Iso2k database, compilation previously published datasets from variety archives that record stable oxygen (δ18O) or hydrogen (δ2H) isotopic compositions waters, which...
Abstract. Palaeoclimate information on multiple climate variables at different spatiotemporal scales is becoming increasingly important to understand environmental and societal responses change. A lack of high-quality reconstructions past hydroclimate has recently been identified as a critical research gap. Speleothems, with their precise chronologies, widespread distribution, ability record changes in local regional variability, are an ideal source such information. Here, we present new...
Past glacials can be thought of as natural experiments in which variations boundary conditions influenced the character climate change. However, beyond last glacial, an integrated view orbital- and millennial-scale changes their relation to record glaciation has been lacking. Here, we present a detailed land-ocean system from Portuguese margin during penultimate glacial place it within framework ice-volume changes, with particular reference European ice-sheet dynamics. The interaction...
The Middle East (ME) spans the transition between a temperate Mediterranean climate in Levant to hyper-arid sub-tropical deserts southern part of Arabian Peninsula (AP), with complex alpine topography northeast feeding Euphrates and Tigris rivers which support life Southeastern Fertile Crescent (FC). Climate projections predict severe drying several parts ME response global warming, making it important understand controls hydro-climate perturbations region. Here we discuss 23 speleothem...