Seawater signatures of Ordovician climate and environment

Author:

Young Seth A.1ORCID,Edwards Cole T.2,Ainsaar Leho3,Lindskog Anders4ORCID,Saltzman Matthew R.5

Affiliation:

1. Department of Earth, Ocean and Atmospheric Science – National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306, USA

2. Department of Geological and Environmental Sciences, Appalachian State University, Boone, NC 28608, USA

3. Department of Geology, University of Tartu, Ravila 14a, Tartu 50411, Estonia

4. Department of Geology, Lund University, Sölvegatan 12, SE-22362 Lund, Sweden

5. School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA

Abstract

Abstract Tracking climatic changes throughout the Ordovician is crucial to a better understanding of the coevolution of life and environment on Earth. Ordovician climate fluctuations have been the subject of a vigorous and productive body of work over the past two decades. Here we present a synthesis of studies that have focused on reconstructing Ordovician climate and environment via direct geochemical proxy datasets and/or numerical modelling approaches. Many new insights have been gained on potential causes of events: the timing and potential causes of the major radiation of Ordovician marine life, changes in weathering and the transition from a greenhouse-to-icehouse state, and cooling and (de)oxygenation during the end-Ordovician Glaciation. Marked improvements in sample resolution/distribution of traditional palaeotemperature (oxygen isotopes), palaeoredox (sulfur isotopes) and weathering proxy records (strontium and neodymium isotopes), as well as the development of new palaeoenvironmental proxies (e.g. clumped, uranium, molybdenum and thallium isotopes; iodine, iron, trace metal geochemistry), have led to better constraints on Ordovician climate and environment. These recent works have led to a more nuanced understanding of the Ordovician Earth System, which allows the global community to focus future efforts on answering remaining questions regarding palaeoclimate and environment, as well as embark upon new investigations.

Publisher

Geological Society of London

Subject

Geology,Ocean Engineering,Water Science and Technology

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Redox changes in the Iapetus Ocean during the Late Ordovician extinction crises;Journal of the Geological Society;2024-08

2. Phosphorus cycling during the Hirnantian glaciation;Palaeogeography, Palaeoclimatology, Palaeoecology;2024-01

3. The Ordovician System: Key concepts, events and its distribution across Europe;Geological Society, London, Special Publications;2023-03-10

4. Changing palaeobiogeography during the Ordovician Period;Geological Society, London, Special Publications;2023-03-10

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