Montserrat Alonso GarciaUniversidad de Salamanca · Department of Geology
Montserrat Alonso Garcia
PhD Geology (Paleoceanography)
About
62
Publications
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806
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Citations since 2017
Introduction
Additional affiliations
June 2014 - present
January 2014 - present
November 2013 - May 2014
Position
- Biostratigrapher
Description
- Neogene and Cretaceous planktonic foraminifer biostratigraphy studies for the Colombian Oil Agency. Collaboration between the University of Salamanca and Antek SA
Education
May 2006 - January 2011
May 2006 - January 2011
September 2005 - September 2006
Publications
Publications (62)
Los microfósiles son una herramienta excepcional para hacer reconstrucciones climáticas y oceanográficas en sedimentos marinos debido a su alta abundancia, y a que muchos grupos permiten hacer estudios geoquímicos, especialmente los que presentan conchas de carbonato cálcico. En particular, las asociaciones de foraminíferos planctónicos han sido am...
We present the first continuous middle through late Pleistocene record of fossil ostracods from the Maldives in the northern Indian Ocean, derived from sediment cores taken at Site U1467 by Expedition 359 of the International Ocean Discovery Program (IODP). Site U1467 lies at 487 m water depth in the Inner Sea of the Maldives archipelago, an ideal...
Planktonic foraminifer oxygen isotopes through MIS 12 were analysed from Ocean Drilling Program Site 977 in the Alboran Sea. After the correction of the sea surface temperature (SST) effect on the δ¹⁸O composition of foraminiferal calcite, the resulting seawater δ¹⁸O (δ¹⁸Ow) was used to reconstruct variations in the δ¹⁸Ow of the Atlantic inflow int...
Marine Isotope Stage (MIS) 13,~533e478 ka, has received particular attention due to the unexpected enhancement of monsoon systems under a cool climate characterized by lower atmospheric CO 2 and larger ice volume than many other interglacials. Key questions remain about its regional expression (intensity, climate variability, length), and underlyin...
A range of future climate scenarios are projected for high
atmospheric CO2 concentrations, given uncertainties over future human
actions as well as potential environmental and climatic feedbacks. The
geological record offers an opportunity to understand climate system
response to a range of forcings and feedbacks which operate over multiple
tempora...
Abstract. A range of future climate scenarios are projected for high atmospheric CO<sub>2</sub> concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record offers an opportunity to understand climate system response to a range of forcings and feedbacks which operate...
Dolomite is a common accessory mineral, widely dispersed in deep-marine sediment, but rarely occurs as distinct layers in this setting. Hence, the nature and formation of dolomite layers in deep marine sediments are very poorly understood. Here, we present new data from three separate dolomite layers that occur within the Pliocene-Quaternary contou...
In the original version of this article (Kunkelova et al. 2018), published on 18 December 2018, there was 1 error in the author name of Dr. Yu.
The progress of science is tied to the standardization of measurements, instruments, and data. This is especially true in the Big Data age, where analyzing large data volumes critically hinges on the data being standardized. Accordingly, the lack of community-sanctioned data standards in paleoclimatology has largely precluded the benefits of Big Da...
p>The South Asian Monsoon (SAM) drives seasonal changes in the atmospheric and ocean circulation of the tropical Indian Ocean, affecting precipitation on land and oceanic primary productivity. This work examined sediments from the International Ocean Discover Program (IODP) Site U1467 (IODP Expedition 359) located in the Maldives Inner Sea (Norther...
This data article describes data of magnetic stratigraphy and anisotropy of isothermal remanent magnetization (AIRM) from “Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system” [1]. Acquisition of isothermal magnetization on pilot samples and anisotropy of isothermal remanent...
This paper reports on the newly discovered occurrence of thick sequences (∼100 m) of Late Oligocene and Early Miocene (∼24.9 to ∼20 Ma) interbedded organic-rich sediments (sapropels) and pelagic (organic poor) carbonates at Sites U1466 and U1468 drilled in the Maldives archipelago during the International Ocean Discovery Program (IODP) Expedition 3...
We report a study of the magnetic stratigraphy and the anisotropy of isothermal remanent magnetization of Pliocene sediments from International Ocean Discovery Program (IODP) Site U1467 drilled in the Maldives platform (Indian Ocean) during Exp. 359. Magnetic stratigraphy gives a precise record of geomagnetic reversals of the early Pliocene from ap...
Changes in paleoclimate and paleoproductivity patterns have been identified by analyzing the coccolithophore assemblages from the IODP Site U1314, located in the subpolar North Atlantic, together with other proxy data available during the time interval from the Marine Isotope Stages (MIS) 14 to MIS 11 (ca. 540 to 400 ka). The comparison of this dat...
The MIS 17 interglacial, ∼715-675 ka, marks the end of the Mid-Pleistocene Transition as intensified, long and asymmetrical 100-kyr ice age cycles became eminently established. Increasing arrival of moisture to the Northern Hemisphere high latitudes, resulting from the northwestward migration of the Subpolar Front and the intensification of the Nor...
Deep-marine regional unconformities are common and significant features of the contourite depositional systems in the Gulf of Cadiz. Some of these unconformities are marked by the development of fine-crystalline dolomite layers, as observed at Sites U1387 and U1391. The timing and mechanism of the dolomite formation are not fully understood. The mi...
Sedimentary records from IODP Sites U1467 and U1471 uncovered a mostly unread sedimentary archive of oceanographic and climatic changes in the Maldives Inner Sea, located in the northern Indian Ocean, that are associated with intensity variations of the South Asian Monsoon (SAM). The SAM is an intense climatic phenomenon that provides ample precipi...
Abstract Indian-Asian monsoon has oscillated between warm/wet interglacial periods and cool/dry glacial periods with periodicities closely linked to variations in Earth’s orbital parameters. However, processes that control wet versus dry, i.e. aridity cyclical periods on the orbital time-scale in the low latitudes of the Indian-Asian continent rema...
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 to the climatic history of the British Isles, c...
Regional unconformities are common and significant features of contourite depositional systems worldwide. They are caused by accelerated bottom currents that erode and winnow the seafloor or prevent deposition from occurring. Such episodes of increased bottom current activity may be linked with major tectonic and/or climatic events, as well as to c...
Based on high-resolution reflection seismic and core data from IODP Expedition 359 we present a new channel-related drift type attached to a carbonate platform slope, which we termed delta drift. Like a river delta, it is comprised of several stacked lobes and connected to a point source. The delta drifts were deposited at the exit of two gateways...
International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of the Maldives in the Indian Ocean. The expedition set out to unravel the timing of Neogene climate changes, in particular the evolution of the South Asian monsoon and fluctuations of the sea level. The timing of thes...
The Maldives carbonate archipelago has been shaped by sea level change, ocean currents, and the onset and intensification of the South Asian Monsoon (SAM). The SAM is an intense climatic phenomenon that provides ample precipitation to southern Asia and is linked to a seasonal reversing wind pattern that controls the modern ocean circulation and pro...
The Iberian Margin is a sensitive area to track high and low latitude processes, and is a key location to understand major past climatic and oceanographic changes. Here we present new biomarker data from IODP Site U1385 (“Shackleton site”) (1017–336 ka) that, when combined with existing data from Cores MD01-2443/4 (last 335 ka), allows us to assess...
Arctic freshwater discharges to the Labrador Sea from melting glaciers and sea ice can have a large impact on ocean circulation dynamics in the North Atlantic, modifying climate and deep water formation in this region. In this study, we present for the first time a high resolution record of ice rafting in the Labrador Sea over the last millennium t...
American Geophysical Union (AGU) Fall Meeting 2016
Arctic freshwater discharges to the Labrador Sea from melting glaciers and sea-ice can have a deep impact on ocean circulation dynamics in the North Atlantic modifying climate and deep water formation in this region. In this study, we present for the first time a high resolution record of ice-rafting in the Labrador Sea over the last millennium to...
The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen M...
International Ocean Discovery Program Expedition 359 was designed to address changes in sea level and currents, along with monsoon evolution in the Indian Ocean. Eight drill sites are located in the carbonate edifice of the Republic of Maldives, which bears a unique and mostly unread Indian Ocean archive of the evolving Cenozoic icehouse world. Thi...
Here we reconstruct past sea surface water conditions on the SW Iberian Margin by analyzing planktonic foraminifer assemblages from IODP Site U1385 sediments (37°34.285'N, 10°7.562'W; 2585m depth). The data provide a continuous climate record from Marine Isotope Stages (MIS) 21 to 13, extending the existing paleoclimate record of the Iberian Margin...
This study focuses on the reconstruction of global changes in the North Atlantic Current (NAC) and its ramifica-tions, the Irminger Current (IC) and the Portugal Current (PC). For this aim, coccolithophore assemblages have been studied at IODP Site U1314 (57ºN) and integrated with published and unpublished data from MD03-2699 (39ºN) core (Amore et...
Three short (20-cm) giant gravity cores were recovered (AD 1990) from ~ 300 m water depth in outer Kangerdlugssuaq Trough (East Greenland) with the aim of studying recent oceanographic changes and compare the proxy-based data with historical and instrumental data for a better understanding of the ice sheet-ocean interactions in the area of Denmark...
We performed a quantitative study of some planktonic foramini- fer species from Integrated Ocean Drilling Program Site U1313 to define main biostratigraphic events. Some of these events were characterized by large changes in species abundance rather than their first or last occurrences. Changes in relative abundances of planktonic foraminifers were...
The reduction in sea ice along the SE Greenland coast during the last century has severely impacted ice-rafting to this area. In order to reconstruct ice-rafting and oceanographic conditions in the area of Denmark Strait during the last ~150 years, we conducted a multiproxy study on three short (20 cm) sediment cores from outer Kangerdlugssuaq Trou...
The potential role of solar irradiance as a climate forcing during the
Medieval Warm Period (MWP)-Little Ice Age (LIA)-20th Century interval
can be tested using several proxies. In this work we use the occurrence
of fine sand sized lithic grains (63-150 μm) in North Atlantic marine
sediments to study the climatic history of high latitudes because t...
Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8′ N, 27° 53.3′ W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800–400 ka). Factor analysis of the planktic foraminifer assemblages suggests that the assemblage w...
Surface water conditions at the Integrated Ocean Drilling Program (IODP) Site U1314 (Southern Gardar Drift, 56° 21.8' N, 27° 53.3' W, 2820 m depth) were inferred using planktic foraminifer assemblages between Marine Isotope Stage (MIS) 19 and 11 (ca. 800-400 ka). Factor analysis of the planktic foraminifer assemblages suggests that the assemblage w...
Stable carbon and oxygen isotopes from benthic and planktic foraminifers, planktic foraminifer assemblages and ice rafted debris from the North Atlantic Site U1314 (Integrated Ocean Drilling Program Expedition 306) were examined to investigate orbital and millennial-scale climate variability in the North Atlantic and its impact on global circulatio...
We performed a quantitative study of some planktonic foramini-fer species from Integrated Ocean Drilling Program Site U1313 to define main biostratigraphic events. Some of these events were characterized by large changes in species abundance rather than their first or last occurrences. Changes in relative abundances of planktonic foraminifers were...
Planktic foraminifer assemblages and lithic components from IODP core U1314 (northern North Atlantic) were studied with high resolution from marine isotope stage (MIS) 14 to 16 (~ 530-700 ka). This study aims to contribute to a better understanding of the mid-Pleistocene climate shifts. The record shows the evolution of the Arctic front and allows...
Projects
Projects (6)
This project aims to reconstruct past interglacial climate features using environmental data from marine sediments in order to understand the climate system dynamics and identify the processes behind natural climatic variability in past warm periods. This study will provide new insights that will enable modelers to more accurately forecast future changes in ocean circulation and climate and their potential impacts on society, and consequently, help policymakers to contend with climate change effects on the global warming context.
PI: Teresa Rodrigues (PhD - IPMA, CCMAR) - teresa.rodrigues@ipma.pt
Co-PI: Fátima Abrantes (PhD - IPMA, CCMAR)
“Warm Worlds” Features and lessons from Past Interglacials “ warm periods ” during the last 1.5 Ma
https://warmworld.ipma.pt/
Funded by the Portuguese national funds from FCT – Foundation for Science and Technology and from the operational programs CRESC Algarve 2020 and COMPETE 2020
PTDC/CTA-GEO/29897/2017
Reconstructing sea surface temperature at The Maldives (Indian Ocean)
Reconstructing changes in productivity and bottom oxygenation