Introduction to a Special Collection: Illustrating the Breadth of Paleoceanography and Paleoclimatology at the Journal's 40‐year Anniversary

Abstract

This special collection celebrates the 40th anniversary of Paleoceanography and Paleoclimatology and highlights the breadth, impact, and frontiers in paleoenvironmental research. Since the journal's founding in 1986 as Paleoceanography , the field has expanded from its early emphasis on marine sedimentary archives to an increasingly integrated Earth system perspective encompassing the oceans, atmosphere, cryosphere, biosphere, and terrestrial environments. The papers in this collection are selected from the recent archives since the expansion to Paleoceanography and Paleoclimatology in 2018. The topics span timescales from the Cretaceous to the Common Era and showcase advances in reconstructing past climates, understanding Earth system processes, developing innovative analytical and computational methods, and synthesizing observations and testing mechanisms with numerical models. Together, they illustrate how studies of past environmental change provide fundamental insights into climate sensitivity, carbon‐cycle dynamics, ocean circulation, abrupt climate change, and hydroclimate variability. They also demonstrate the importance of past climate for evaluating climate models, contextualizing modern environmental change, and informing projections of Earth's future under continued anthropogenic forcing. This anniversary collection celebrates four decades of scientific discovery, with a curated selection of articles that illustrate recent themes in the journal, from greenhouse to icehouse climates, and cutting‐edge methods, to reveal how the past informs our future.