Blanca Ausín

ASSISTANT PROFESSOR

GEOLOGY DEPARTMENT OF SALAMANCA UNIVERSITY

Research

I combine my multidisciplinary expertise in micropaleontology and organic geochemistry to study past climate variability at millennial and sub-millennial time scales using multiproxy approaches.

My current research focuses on evaluating spatial and temporal biases among specific proxy-bearing components from marine sediments (i.e. organic carbon, biomarkers, micro- and nanno-fossils). I  place emphasis on the radiocarbon (14C) signatures of these components to unravel  the driving processes of such biases and better assess the spatiotemporal integrity of the derived proxy records and their corresponding climate signal and interpretation. I am also particularly interested in elucidating the influence of the preferential associations between minerals and specific biomarkers on the derived climatic signals.

I use this information and new knowledge on how hydrodynamic conditions influence the OC and biomarker transport pathways in the ocean to produce high-resolution climate proxy-records and reconstruct the abrupt climate changes the Earth has undergone for the last 30,000 years.

I like Physical Oceanography and like Ecology too, so I also enjoy merging those two in collaborations with multidisciplinary international teams.

I just participated in the IODP Expedition 378: South Pacific Paleogene Climate. This Expedition aims to recover marine sedimentary sequences to investigate the past climate of our Planet during much of the Paleogene, a period of time estimated to quadruplicate the current CO2 levels during several time spans. I will use the recovered sediments to reconstruct the sea surface temperature during several of the warmest periods of the last million years. Click here if you want to know more: https://iodp.tamu.edu/scienceops/expeditions/south_pacific_paleogene_climate.html

Projects

PALEOIGLOO: PALEOtemperatura y CO2 a escala Glacial-InterglaciaL durante el OligocenO

TRAMPOLINE: Temporal Relationships AMong PrOxy signaLs In mariNe sEdiments (TRAMPOLINE)

Rosetta Stone: Deciphering the Paleoclimate Rosetta Stone Particle-by-Particle

Publications

Ausín, B., Haghipour, N., Bruni, E., and Eglinton, T.: The influence of lateral transport on sedimentary alkenone paleoproxy signals, Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2021-204, in review, 2021

Cutmore, A., Ausín B., et al., (accepted). Abrupt intrinsic and extrinsic responses of Southwestern Iberian vegetation to millennial-scale variability over the past 28 ka. Journal of Quaternary Science.

Ausín, B., Sarnthein, M., and Haghipour, N.: Glacial-to-deglacial reservoir and ventilation ages at the southwest Iberian continental margin, Quaternary Science Reviews, 255, 106818, 2021.

González-Lanchas, A.Flores, J.-A.Sierro, F. J.Sánchez Goñi, M. F.Rodrigues, T., Ausín, B, et al. (2021). Control mechanisms of Primary Productivity revealed by calcareous nannoplankton from Marine Isotope Stages 12 to 9 at the Shackleton Site (IODP Site U1385)Paleoceanography and Paleoclimatology36, e2021PA004246

 Ausín, B., Bruni, E., Haghipour, N., Welte, C., Bernasconi, S.M., Eglinton, T.I.: Controls on the abundance, provenance and age of organic carbon buried in continental margin sediments, Earth and Planetary Science Letters, 558, 116759, 2021. 

Sarnthein, M., Küssner, K., Grootes, P. M., Ausín, B., Eglinton, T., Muglia, J., Muscheler, R., Schlolaut, G. (2020), Plateaus and jumps in the atmospheric radiocarbon record – Potential origin and value as global age markers for glacial-to-deglacial paleoceanography, a synthesis, Climate of the Past, 16, 1-25, 2020.

Sierro, F.J., Hodell, D.A., Andersen, N., Azibeiro, L.A., Jimenez‐Espejo, F.J., Bahr, A., Flores, J.A., Ausin, B., Rogerson, M., Lozano‐Luz, R., Lebreiro, S. and Hernandez‐Molina, F.J. (2020), Mediterranean Overflow over the last 250 ky. Freshwater forcing from the tropics to the ice sheets. Paleoceanography and Paleoclimatology. Accepted Author Manuscript. doi:10.1029/2020PA003931

Thomas, D.J., Röhl, U., Childress, L.B., and the Expedition 378 Scientists. Expedition 378 Preliminary Report: South Pacific Paleogene Climate. International Ocean Discovery Program. https://doi.org/​14379/​iodp.pr.378.2020, 2020

Luz, L.G., Santos, T.P., Eglinton, T.I., Montluçon, D., Ausín, B., Haghipour, N., Sousa, S.M., Nagai, R., Carreira, R.S. Contrasting late-glacial paleoceanographic evolution between the upper and lower continental slope of the western South Atlantic. Climate of the Past 16, 1245-1261, 2020.

Ausín, B., Hodell, D.A., Cutmore, A., Eglinton, T.I. The impact of abrupt deglacial climate variability on productivity and upwelling on the southwestern Iberian margin. Quaternary Science Reviews 230, 106139, 2020.

Guitián J, Phelps, S., Polissar, P.J., Ausín, B., Eglinton, T.I., Stoll, H.M. Midlatitude Temperature Variations in the Oligocene to Early Miocene. Paleoceanography and Paleoclimatology 34, 1328-1343, 2019.

Ausín, B., Magill, C., Haghipour, N., Fernández, Á., Wacker, L., Hodell, D., Baumann, K.-H., Eglinton, T.I.. (In)coherent multiproxy signals in marine sediments: Implications for high-resolution paleoclimate reconstruction. Earth and Planetary Science Letters 515, 38-46, 2019.

Ausín, B., Haghipour, N., Wacker, L., Voelker, A.H.L., Hodell, D., Magill, C., Looser, N., Bernasconi, S.M., Eglinton, T.I.: Radiocarbon age offsets between two surface dwelling planktonic foraminifera species during abrupt climate events in the SW Iberian margin, Paleoceanography and Paleoclimatology, 34, 63-78, 2019.

Luz, L.G., Ausín, B., Haghipour, N., Eglinton, Carreira, R.S. Alkenones Isolation from Lipid Fraction of Marine Sediments in the Southeastern Continental Brazilian Slope. Revista Virtual de Química, 11, 364-377, 2020.

Hernández-Almeida, I., Ausín, B., Saavedra-Pellitero, M., Baumann, K.H., Stoll, H.M.: Quantitative reconstruction of primary productivity in low latitudes during the last glacial maximum and the mid-to-late Holocene from a global Florisphaera profunda calibration dataset, Quaternary Science Reviews, 205, 166-181, 2019.

Haghipour, N., Ausín, B., Usman, M.O., Ishikawa, N., Wacker, L., Welte, C., Ueda, K., Eglinton, T.I.: Compound-Specific Radiocarbon Analysis by Elemental Analyzer–Accelerator Mass Spectrometry: Precision and Limitations, Analytical Chemistry, 91, 2042-2049, 2019.

Hernández-Almeida, I., Ausín, B., Saavedra-Pellitero, M., Baumann, K.H., Stoll, H.M.: A dataset of modern and fossil distribution of coccolithophore species Florisphaera profunda in the world׳s ocean, Data in Brief, 22, 826-829, 2019.

Magill, C.R., Ausín, B., Wenk, P., McIntyre, C., Skinner, L., Martínez-García, A., Hodell, D.A., Haug, G.H., Kenney, W., Eglinton, T.I.: Transient hydrodynamic effects influence organic carbon signatures in marine sediments, Nature Communications, 9, 4690, 2018

Ausín B, Zúñiga D, Flores JA, Cavaleiro C, Froján M, Villacieros-Robineau N, Alonso Pérez F, Arbones B, Santos C, de la Granda F, Castro CG, Abrantes F, Eglinton TI, Salgueiro E.: Spatial and temporal variability in coccolithophore abundance and distribution in the NW Iberian coastal upwelling system, Biogeosciences, 15, 245-262, 2018

Balestra B., Grunert P., Ausín B., Hodell D., Flores J.A., Alvarez-Zarikian C.A., Hernandez-Molina F.J., Stow D., Piller W.E., Paytan A. Coccolithophore and benthic foraminifera distribution patterns in the Gulf of Cadiz and Western Iberian Margin during Integrated Ocean Drilling Program (IODP) Expedition 339, Journal of Marine Systems, 170, 50-67, 2017.

Ausín B, Hernández-Almeida I, Flores JA, Sierro FJ, Grosjean M, Francés G, Alonso B.: Development of coccolithophore-based transfer function in the Western Mediterranean Sea: a sea surface salinity reconstruction for the last 15.5 kyr. Climate of the Past, 11, 1635-1651, 2015

Ausín B, Flores JA, Sierro FJ, Cacho I, Hernández-Alemida I, Martrat B, Grimalt JO.: Atmospheric patterns driving Holocene productivity in the Alboran Sea (Western Mediterranean): A multiproxy approach. The Holocene, 25, 583-595, 2015.

Ausín B, Flores JA, Bácena MA, Sierro FJ, Cacho I, Hernández-Alemida I, Gutierrez-Arnillas E, Francés G, Martrat B, Grimalt JO.: Coccolithophore productivity and surface water dynamics in the Alboran Sea during the last 25 kyr. Palaeogeography, Palaeoclimatology, Palaeoecology, 418, 126-140, 2015.

Fernández Castro B, Anderson L, Marañón E, Neuer S, Ausín B, González Dávila M, Santana Casiado JM, Cianca A, Santana R, Llinás O, Rueda MJ, Mouriño Carballido B.: Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical Gyre. Biogeosciences, 24, 2831-2846, 2012.