Palaeoceanography, geochemistry, foraminifera, (cyclo)stratigraphy, astrochronology
NERC Independent Research Fellow
|NERC Independent Research Fellow||Kathleen Lonsdale, G02|
|The London Geochemistry and Isotope Centre (LOGIC)|
|firstname.lastname@example.org||020 3108 6382 (56382)|
My research interests span palaeoceanography, geochemistyr and stratigraphy, with a strong focus on understanding Cenozoic climate evolution and dynamics. My research combines high-resolution multi-proxy sedimentological and geochemical records with stratigraphy, astrochronology and core image processing techniques on deep sea sediments. I have expertise in XRF core scanning, stable isotope and trace element analyses on foraminifera and bulk sediment, as well as scanning electron microscopy.
Marine archives recovered by IODP and its predecessors underpin my research. I was part of the Expedition Science Party on IODP Expeditions 363 (Western Pacific Warm Pool; 2016) and 378 (South Pacific Paleogene Climate; 2020). My research involves collating, integrating and visualising extensive datasets. To assist with this, I helped develop Code for Ocean Drilling Data (CODD) to facilitate analysis of ocean drilling data and the creation of composite core images. I also worked on the Earthsequencing Image Database, which enables rapid access to the IODP core image archive.
Recently at UCL, my research has focussed on uncerstanding Cenozoic climate change since the inception of major polar ice sheets. More information about individual projects in provided below. My initial Marie Skłodowska Curie Action 'MIONIÑO' Research Fellowship focussed on assessing the extent, driving force and global climate impacts of a potentially permanent El-Niño-like state in the Pacific during the late Miocene. In late 2022, I start my NERC Independent Research Fellowship project 'CoolRhythms', where I will look at why the beat of Earth's climate responds differently to semiperiodic astronomical forcing across comparable major ice growth events in the late Paleogene and Miocene.
- EGU 2020 Division Outstanding Early Career Scientist Award
- 66 million years of Earth’s climate uncovered from ocean sediments.
- Geological Society 2022 Wollaston Fund
'Resolving the debate on a permanent El Niño-like state in the late Miocene: establishing equatorial Pacific conditions, driving forces and global impacts.'
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 796220 (https://doi:10.3030/796220).
A key dispute in palaeoclimate research is whether or not a permanent El Niño-like state, with warm waters spreading across the equatorial Pacific, existed during the Late Miocene. Late Miocene climate was similar to the 4°C warming predicted for 2100 by the IPCC. As today’s El Niño causes global climate anomalies, a permanent El Niño-like state in the past may have had serious, global consequences, such as widespread aridity. MIONIÑO will test the existence of a late Miocene permanent El Niño-like state using geochemical microfossil records from recently recovered Western Pacific Warm Pool (WPWP) sediments to assess equatorial Pacific conditions, their driving forces and global impacts. MIONIÑO will advance past and future climate change research. Resolving the debate on permanent El Niño-like conditions in the Late Miocene will discern whether warm El Niño events will become more frequent or evolve into a new mean state. Assessing causal links between permanent El Niño-like conditions and increased continental aridity will improve the future climate models that underpin climate mitigation and adaptation strategies globally. MIONIÑO can further help us understand the true societal impact of more frequent or even permanent El Niño-like conditions.
For further information and project updates, please see the MIONIÑO project website. Please note, any dissemination of MIONIÑO's results only reflect the author's view. The European Research Executive Agency is not responsible for any use that may be made of the information it contains.
'The impact of ice volume and ocean circulation on Earth's Coolhouse climate beat'
NERC Independent Research Fellowship NE/W009366/1
Earth's changing climate is inexorably linked to the energy it receives from the Sun, which varies rhythmically, driven by the eccentricity, obliquity and precession of Earth's orbit. Earth redistributes this solar energy, sustaining warmer and cooler climate states that last for millions of years (Myr). The shifts between Earth's long-term climate states are caused by large changes in polar ice and greenhouse gasses. Over the last 40 million years, ice volume has played an important role in influencing Earth's climate. One of these climate states - the Coolhouse - captures when large ice sheets first formed at Earth's poles. The solar energy also drives a faster climate response, which beats in tune with these orbital variations. Even though the rhythmic energy that drives Earth's climate response has not changed, Earth's climate beat itself has not been stable through time. We currently do not understand what causes this. Through the CoolRhythms proposal, I will establish when and why these different beats in Earth's climate occur, focussing on the late Paleogene and the Miocene, and explore if global warming could cause another change of climate beat in the future.
Code for Ocean Drilling Data (https://www.codd-home.net)
Software Package for IGOR Pro™️.
The International Ocean Discovery Program (IODP) and its predecessors (IODP/ODP/DSDP) have recovered a wealth of marine sediment cores, which have shaped our understanding of how Earth's Oceans evolved since the Cretaceous. Since the 1960s, Legs and later Expeditions recovered a wide range of sediment cores and generated huge amounts of shipboard data, including physical properties tracks and core images, all of which are published open access in the Proceedings volumes. Synthesising and integrating these results, especially the information available from core images, can be overwhelming. Roy Wilkens developed various functions that run within the IGOR Pro™️ framework to help synthesise, integrate and assess data generated through scientific ocean drilling. Working with Roy Wilkens, Thomas Westerhold, Nina Rohlfs and others, we developed these macros into the Code for Ocean Drilling Data, or CODD, software package, which is available for download here: https://www.codd-home.net. The CODD package is designed to aid in the visualisation and analysis of data collected during ocean drilling cruises. Modules include those for image and data plotting and splicing, age model development, site-to-site correlation and soon to be added tuning and spectral analysis. The different functionality can be run both at the command line or through cursor-driven actions, depending on users preferences.
For more information, see the CODD website and original citation:
Wilkens, R. H., Westerhold, T., Drury, A. J., Lyle, M., Gorgas, T., and Tian, J., 2017, 'Revisiting the Ceara Rise, equatorial Atlantic Ocean: isotope stratigraphy of ODP Leg 154 from 0 to 5 Ma', Climate of the Past, 13, 779-793, https://doi.org/10.5194/cp-13-779-2017.