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Your search keyword '"Trauth, Martin H"' showing total 37 results
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37 results on '"Trauth, Martin H"'

3. Hydroclimate reconstructions in the Suguta Valley, northern Kenya, during the Early-Middle Pleistocene Transition

Author

Robakiewicz, Elena, Owen, Bernhart, Rosca, Carolina, Deino, Alan, Garcin, Yannick, Trauth, Martin H., Kübler, Simon, Junginger, Annett, Robakiewicz, Elena, Owen, Bernhart, Rosca, Carolina, Deino, Alan, Garcin, Yannick, Trauth, Martin H., Kübler, Simon, and Junginger, Annett

Abstract

The Early-Middle Pleistocene Transition (EMPT) between 1200 and 700 ka represents a major global climate transition from dominantly 41,000- to 100,000-year glacial cycles. The forces and mechanisms behind this transition and the response of African environments are not well understood. The active volcanism and tectonics of the East African Rift System add complexity to local environmental systems and can erase important proxy records, inhibiting studies of lacustrine dynamics. As a result, there is minimal understanding of how this transition impacted the region's lake systems. At Paleolake Suguta, in the northern Kenya Rift, however, flood basalts cap lacustrine EMPT-age deposits, preserving these strata and their valuable paleoenvironmental record. This research presents a high-resolution reconstruction of hydrological change from approximately 931 to 831 ka within the Suguta-Turkana Basin in the northern Kenya Rift. Paleolake dynamics are reconstructed from a 41 m sedimentary section using diatom morphology, sedimentology, and X-Ray Fluorescence elemental analysis. Results show that lake levels varied greatly during this part of the EMPT with two wetter phases and two drier phases developing over about 100 kyr. From ∼885–831 ka, especially, the Suguta-Turkana Basin exhibits rapid changes in paleohydrology, ranging between deep stratified lakes; shallow, well-mixed lakes; and complete desiccation, with some of these changes occurring on an order of hundreds of years. This EMPT Suguta-Turkana-Baringo record therefore provides valuable insight into hydroclimate variability at an overall resolution of several thousand years, allowing reconstruction of past environments during a period of poorly understood terrestrial environmental change.

Published
2023

9. Using multiple chronometers to establish a long, directly-dated lacustrine record: Constraining >600,000 years of environmental change at Chew Bahir, Ethiopia

Author

Roberts, Helen M., primary, Ramsey, Christopher Bronk, additional, Chapot, Melissa S., additional, Deino, Alan L., additional, Lane, Christine S., additional, Vidal, Céline, additional, Asrat, Asfawossen, additional, Cohen, Andrew, additional, Foerster, Verena, additional, Lamb, Henry F., additional, Schäbitz, Frank, additional, Trauth, Martin H., additional, and Viehberg, Finn A., additional

Published
2021
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10. Recurring types of variability and transitions in the ∼620 kyr record of climate change from the Chew Bahir basin, southern Ethiopia

Author

Trauth, Martin H., primary, Asrat, Asfawossen, additional, Cohen, Andrew S., additional, Duesing, Walter, additional, Foerster, Verena, additional, Kaboth-Bahr, Stefanie, additional, Kraemer, K. Hauke, additional, Lamb, Henry F., additional, Marwan, Norbert, additional, Maslin, Mark A., additional, and Schäbitz, Frank, additional

Published
2021
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11. East African climate pulses and early human evolution

Author

Maslin, Mark A., Brierley, Chris M., Milner, Alice M., Shultz, Susanne, Trauth, Martin H., and Wilson, Katy E.

Subjects
Cenozoic climate transitions, Global and Planetary Change, Palaeoclimatology, Tectonics, Orbital forcing, Hominin, Geology, Pulsed climate variability hypothesis, Palaeoliminology, East Africa, Ecology, Evolution, Behavior and Systematics, Human evolution
Abstract

Current evidence suggests that all of the major events in hominin evolution have occurred in East Africa. Over the last two decades, there has been intensive work undertaken to understand African palaeoclimate and tectonics in order to put together a coherent picture of how the environment of East Africa has varied in the past. The landscape of East Africa has altered dramatically over the last 10 million years. It has changed from a relatively flat, homogenous region covered with mixed tropical forest, to a varied and heterogeneous environment, with mountains over 4 km high and vegetation ranging from desert to cloud forest. The progressive rifting of East Africa has also generated numerous lake basins, which are highly sensitive to changes in the local precipitation-evaporation regime. There is now evidence that the presence of precession-driven, ephemeral deep-water lakes in East Africa were concurrent with major events in hominin evolution. It seems the unusual geology and climate of East Africa created periods of highly variable local climate, which, it has been suggested could have driven hominin speciation, encephalisation and dispersal out of Africa. One example is the significant hominin speciation and brain expansion event at ∼1.8 Ma that seems to have been coeval with the occurrence of highly variable, extensive, deep-water lakes. This complex, climatically very variable setting inspired first the variability selection hypothesis, which was then the basis for the pulsed climate variability hypothesis. The newer of the two suggests that the long-term drying trend in East Africa was punctuated by episodes of short, alternating periods of extreme humidity and aridity. Both hypotheses, together with other key theories of climate-evolution linkages, are discussed in this paper. Though useful the actual evolution mechanisms, which led to early hominins are still unclear and continue to be debated. However, it is clear that an understanding of East African lakes and their palaeoclimate history is required to understand the context within which humans evolved and eventually left East Africa.

Published
2014
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25. Climatic change recorded in the sediments of the Chew Bahir basin, southern Ethiopia, during the last 45,000 years

Author

Foerster, Verena, primary, Junginger, Annett, additional, Langkamp, Oliver, additional, Gebru, Tsige, additional, Asrat, Asfawossen, additional, Umer, Mohammed, additional, Lamb, Henry F., additional, Wennrich, Volker, additional, Rethemeyer, Janet, additional, Nowaczyk, Norbert, additional, Trauth, Martin H., additional, and Schaebitz, Frank, additional

Published
2012
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