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Initiative calls for increased global collaboration to reconstruct the climate of the past 100 million years more reliably across regions
Being in the right place at the right time is crucial. Clocks help us to coordinate dates and appointments. This is also important for research of the geological past, as it is the only way to reliably reconstruct cause and effect in the climate system. Geological climate archives must therefore be dated as precisely as possible in order to draw reliable conclusions. An international initiative of researchers, to which Dr. Thomas Westerhold from MARUM – Center for Marine Environmental Sciences at the University of Bremen, among others, has made a significant contribution, is now calling for the most important marine climate archives to be dated more precisely than ever before across all regions.
TIMES is the title of the international team's project, which is an acronym for “Time Integrated Matrix for Earth Sciences”. The idea behind it is to launch a global program with the aim of synchronizing age models for particularly important geological climate records from the past 100 million years. The researchers have now outlined their motivation and necessity for this program in a publication in the journal Paleoceanography and Paleoclimatology of the American Geophysical Society.
Geological records from ocean drilling allow researchers to better understand how the natural climate system works over time and space. But to obtain reliable information, precise knowledge of the timing of past climate events is required, emphasizes Dr. Thomas Westerhold. At present, many important climate archives are not sufficiently well synchronized to establish causal links between data from different locations with certainty.
“In particular, age models for paleoclimate archives have proven to be a bottleneck when it comes to understanding the dynamics of past warm climate stages, which is so urgently needed to obtain information about future climate pathways.”
As a multidisciplinary team from palaeoceanography, palaeoclimate research and geochronology, Westerhold and his co-authors emphasize in their publication that it is crucial to synchronize globally consistent and very precise dating for all important sedimentary climate archives across geographical regions. One example: Recurring patterns in sediment cores trace changes in the Earth's orbit around the sun, known as Milanković cycles. Like a metronome, these fluctuations have set the pace for climate change. Using these astronomical cycles, researchers can determine the age in certain layers of the ocean floor and thus synchronize the archives with extreme precision.
“It is important to now understand the biological and climatic processes on Earth that influence evolution, extinction, recovery and resilience. However, the most important climate proxy data from the past 100 million years, which can provide precise information about this, are not sufficiently synchronized in time across the different regions, which makes it considerably more difficult to understand the Earth's climate dynamics,” explains Westerhold. Most of the material and data for this period is available – because that is how far back the material goes that was obtained in the international ocean and continental drilling programs almost worldwide.
Synchronizing 100 million years of regional and global climate history is very complex, and the TIMES project is extensive. Since timing is everything, Westerhold's team emphasizes, internationally coordinated work must begin now to calibrate the climate records of the past 100 million years so precisely that the Earth's climate history can reliably help shape a safe future for humanity.
MARUM produces fundamental scientific knowledge about the role of the ocean and the seafloor in the total Earth system. The dynamics of the oceans and the seabed significantly impact the entire Earth system through the interaction of geological, physical, biological and chemical processes. These influence both the climate and the global carbon cycle, resulting in the creation of unique biological systems. MARUM is committed to fundamental and unbiased research in the interests of society, the marine environment, and in accordance with the sustainability goals of the United Nations. It publishes its quality-assured scientific data to make it publicly available. MARUM informs the public about new discoveries in the marine environment and provides practical knowledge through its dialogue with society. MARUM cooperation with companies and industrial partners is carried out in accordance with its goal of protecting the marine environment.
Dr. Thomas Westerhold
MARUM – Center for Marine Environmental Sciences, University of Bremen
Phone: +49 421 218-65672
Email: twesterhold@marum.de
T. Westerhold, C. Agnini, E. Anagnostou, F. Hilgen, B. Hönisch, A. N. Meckler, H. Pälike, B. Wade, S. Sosdian, J. Kasbohm: Timing Is Everything. Paleoceanography and Paleoclimatology. 2024. DOI: https://doi.org/10.1029/2024PA004932
http://www.marum.de/en/TIMES.html
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