Land‐ocean coupling between the Humboldt Current System and Atacama palaeoclimate in the Neogene
Research areas: Palaeoclimate, Palaeoceanography, Stratigraphy
Principal investigators: Prof. Patrick Grunert, Dr. Jassin Petersen
Project Info
Today’s hyperarid conditions in the Atacama Desert are determined by the inhibition of moisture influx from the South Atlantic and South‐eastern Pacific and its location north of the Southern Westerlies. However, episodic lacustrine and fluviatile deposits in the Atacama’s hyperarid core document alternations between hyperarid and more humid (semiarid to arid) conditions since the Miocene. The forcings and feedbacks behind these palaeoclimatic fluctuations and in particular their considerable spatial and temporal variability are poorly understood. We intend to explore land‐ocean coupling between the palaeoclimate of the Atacama Desert and the Humboldt Current System (HCS) on different time‐scales throughout the Neogene.
Lower Miocene to Pliocene marine sediments exposed along the coastline of northern Chile (23–30°S) provide an outstanding archive to address these questions. Based on sclerochronology (long‐lived bivalves) and microfossils (foraminifera; assemblages and shell geochemistry) we aim to determine variations in sea‐surface temperatures, upwelling properties and continental runoff on seasonal to orbital time scales. The new low‐ and high-resolution records will provide unprecedented insights into forcings and feedbacks between HCS intensity, ENSO behaviour, upwelling properties, moisture flux to the adjacent continent and palaeoclimatic fluctuations in the Atacama Desert.
Publications
Project A4 - Publications
Event Papers
Bouhdayad, F., Menezes Freire, T., Schneider, L., Herwartz, D., Scheidt, S., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2024.
Depositional environment of upper Miocene to lower Pliocene diatom-rich deposits of the Bahía Inglesa Formation inferred from benthic foraminiferal assemblages.
Proc. of EGU24, April 14 - 19, 2024, Vienna Austria, 1 - 2.
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2023.
Dating of coastal upwelling in northern-central Chile: an integrated microfossil record of diatomaceous sediments from the Neogene Bahía Inglesa formation.
The Micropalaeontological Society Annual Conference 2023. Proc. of The Micropalaeontological Society Annual Conference 2023, November 15 - 17, 2023, Southampton, United Kingdom, 62 - 63.
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Herwartz, D., Scheidt, S., Leicher, N., Wennrich, V., Albert Roper, R., Gerdes, A., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2023.
Stratigraphy and depositional environment of Neogene diatom-rich sediments (Bahía Inglesa Formation) at Quebrada Tiburón, northern-central Chile.
Proc. of EGU General Assembly 2023, April 23 - 28, 2023, Vienna, Austria, 9253 - 9254.
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Herwartz, D., Scheidt, S., Leicher, N., Wennrich, V., Albert Roper, R., Gerdes, A., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2023.
Integrated stratigraphy of Neogene diatom-rich sediments (Bah´ıa Inglesa Formation) in northern-central Chile.
Proc. of Strati 2023, July 11 - 13, 2023, Lille France, 59 - 60.
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Herwartz, D., Scheidt, S., Leicher, N., Wennrich, V., Albert, R., Gerdes, A., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2023.
Stratigraphy and depositional environment of Neogene diatom-rich sediments (Bahía Inglesa Formation) at Quebrada Tiburón, northern-central Chile.
Proc. of EGU General Assembly 2023, April 23 - 28, 2023, Vienna, Austria, 9253 - 9253.
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Petersen, J., Nielsen, S., Rivadeneira, M. M., Grunert, P., 2022.
Late Miocene–Pliocene palaeoceanographic and sea level changes off northern-central Chile based on Foraminifera from the Bahía Inglesa Formation.
Proc. of TMS 2022 The annual conference of the Micropalaeontological Society, September 11 - 15, 2022, MARUM, the University of Bremen, Germany, 67 - 68.
Data
Project A4 - Research Data
Menezes Freire, T., Bouhdayad, F., Petersen, J., Nielsen, S., Rivadeneira, M., Grunert, P., 2023.
Planktonic foraminifera occurrences in sections A and C of Quebrada Tiburón.
CRC1211 Database (CRC1211DB).
Menezes Freire, T., Bouhdayad, F., Petersen, J., Nielsen, S., Rivadeneira, M., Grunert, P., 2023.
Stratigraphic section of Quebrada Las Salinas, Coquimbo Formation.
CRC1211 Database (CRC1211DB).
Grunert, P., 2023.
Stratigraphic correlation of Quebrada Tiburón outcrops.
CRC1211 Database (CRC1211DB).
Carballeira, R., 2023.
Siliceous microfossils in Neogene sediment samples from Chile.
CRC1211 Database (CRC1211DB).
Feller, J., 2023.
Grain size data - Quebrada Tiburón.
CRC1211 Database (CRC1211DB).
Feller, J., 2023.
Grain size data - Hornitos.
CRC1211 Database (CRC1211DB).
Feller, J., 2023.
Grain size data - Caleta Herradura.
CRC1211 Database (CRC1211DB).
Bouhdayad, F., Makowka, L., Schneider, L., Menezes Freire, T., Petersen, J., Nielsen, S., Rivadeneira, M., Grunert, P., 2023.
Neogene palaeoceanographic changes off northern-central Chile based on benthic foraminifera from the Bahía Inglesa Formation.
CRC1211 Database (CRC1211DB).
Bouhdayad, F., Menezes Freire, T., Auer, G., Carballeira, R., Herwartz, D., Scheidt, S., Leicher, N., Wennrich, V., Albert Roper, R., Gerdes, A., Petersen, J., Nielsen, S., Rivadeneira, M., Grunert, P., 2023.
Stratigraphy and depositional environment of Neogene diatom-rich sediments (Bahía Inglesa Formation) at Quebrada Tiburón, northern-central Chile.
CRC1211 Database (CRC1211DB).
Blanco, B., Yogeshwar, P., 2023.
Transient Electromagnetic dataset of geophysical Exploration for the Quebrada Tiburon, northern Chile.
CRC1211 Database (CRC1211DB).
