Impact of Dust and Temperature on Primary Productivity in Late Miocene Oceans DOI Creative Commons
Quentin Pillot, Anta‐Clarisse Sarr, Yannick Donnadieu

et al.

Paleoceanography and Paleoclimatology, Journal Year: 2025, Volume and Issue: 40(1)

Published: Jan. 1, 2025

Abstract Most of the primary productivity in ocean comes from phytoplankton, and is impacted, among other things, by amount nutrients available, as well temperature. The Late Miocene Pliocene were marked global aridification, linked to emergence large deserts, likely increasing input dust thus into ocean. There was also a decrease temperature during this period, decline atmospheric CO 2 concentration. objective study explore sensitivity levels on oceans under boundary conditions. Here we used simulations performed with coupled ocean‐atmosphere model IPSL‐CM5A2 its marine biogeochemistry component PISCES paleogeography. Our results show that an increase produces quasi‐generalized productivity, associated nutrient limitation. This leads deficits some areas, such coastlines Eastern Equatorial Pacific. lower water temperatures lead reduction productivity. mainly due supply resulting less intense remineralization. In addition, our change carbon export are highly heterogeneous spatially. Simulations combined sedimentary data suggesting link between cooling Biogenic Bloom Pliocene.

Language: Английский

A 485-million-year history of Earth’s surface temperature DOI
Emily J. Judd, Jessica E. Tierney, Daniel J. Lunt

et al.

Science, Journal Year: 2024, Volume and Issue: 385(6715)

Published: Sept. 19, 2024

A long-term record of global mean surface temperature (GMST) provides critical insight into the dynamical limits Earth's climate and complex feedbacks between broader Earth system. Here, we present PhanDA, a reconstruction GMST over past 485 million years, generated by statistically integrating proxy data with model simulations. PhanDA exhibits large range GMST, spanning 11° to 36°C. Partitioning states indicates that more time was spent in warmer rather than colder climates reveals consistent latitudinal gradients within each state. There is strong correlation atmospheric carbon dioxide (CO

Language: Английский

Citations

31
Global Mean and Relative Sea-Level Changes Over the Past 66 Myr: Implications for Early Eocene Ice Sheets DOI Creative Commons
Kenneth G. Miller, William J. Schmelz, James V. Browning

et al.

Earth Science Systems and Society, Journal Year: 2024, Volume and Issue: 3

Published: Jan. 18, 2024

We estimate ice-volume driven (barystatic; BSL) sea-level changes for the Cenozoic using new Mg/Ca data from 58 to 48 Ma and a revised analysis of trends over past 66 Myr. combine records BSL, temperature-driven sea level, long-term ocean basin volume variations derive global mean geocentric level (GMGSL; “eustatic”) estimate. Bayesian with Gaussian process priors shows that our BSL shares component covaries on Myr scale “backstripped” relative (RSL) estimates (accounting compaction, loading, thermal subsidence) US Mid-Atlantic Coastal Plain, validating method errors ±10 m. Peak warmth, elevated GMGSL high CO 2 , ice-free conditions occurred at times in Paleocene Eocene (ca. 64, 57.5, 35 Ma) much Early (55–48 Ma). However, results show was punctuated specific by several Myr-scale lowerings (∼20–40 m) require growth decay significant continental ice sheets even supposedly “ice-free” world. Continental-scale waxed waned beginning ca. 34 (>50 m changes), near complete collapse during Miocene Climate Optimum (17–14.8 Both RSL have markedly higher Oligocene amplitudes (20–60 than recently published δ 18 O-based (<20 lower those Exxon Production Research (>100 m), leading us reject estimates. The margin dominated but overprinted mantle dynamic topography scale, showing approximately 50 regionally propagating changes.

Language: Английский

Citations

12
The Cretaceous world: plate tectonics, palaeogeography and palaeoclimate DOI Creative Commons
Christopher R. Scotese, Christian Vérard, Landon Burgener

et al.

Geological Society London Special Publications, Journal Year: 2024, Volume and Issue: 544(1)

Published: May 3, 2024

The tectonics, geography and climate of the Cretaceous world were very different from modern world. At start Cretaceous, supercontinent Pangaea had just begun to break apart only a few small ocean basins separated Laurasia, West Gondwana East Gondwana. Unlike world, there no significant continent–continent collisions during continents low-lying easily flooded. transition Pangaea-like configuration more dispersed continental arrangement important effects on global sea level climate. During Early as rifted apart, new rifts transformed into young basins. oceanic lithosphere in these was thermally elevated, which boosted level. Sea level, average, c. 70 m higher than that present day. highest mid-Cretaceous (90–80 Ma), with subsidiary peak occurring 120 Myr ago (early Aptian). Overall, much warmer present-day (>10°C warmer). These warm times produced anoxic events (OAEs), high temperatures equatorial regions sometimes made terrestrial shallow-marine ecosystems uninhabitable (temperatures >40°C). This is unlike anything we have seen last 35 may presage eventual results man-made warming. mostly stable, hot regime endured for nearly 80 before dramatically terminating Chicxulub bolide impact 66 ago. Temperatures plummeted icehouse levels ‘impact winter’ result sunlight-absorbing dust aerosols being thrown atmosphere. As consequence collapse food chain, 75% all species wiped out. effect this extinction event second great Permo-Triassic Extinction.

Language: Английский

Citations

12
Evolution of Copolymers of Epoxides and CO2: Catalysts, Monomers, Architectures, and Applications DOI
Guan‐Wen Yang, Rui Xie, Yao‐Yao Zhang

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

The copolymerization of CO

Language: Английский

Citations

11
Functional traits of fossil plants DOI Creative Commons
Jennifer C. McElwain, William J. Matthaeus, Catarina Barbosa

et al.

New Phytologist, Journal Year: 2024, Volume and Issue: 242(2), P. 392 - 423

Published: Feb. 26, 2024

A minuscule fraction of the Earth's paleobiological diversity is preserved in geological record as fossils. What plant remnants have withstood taphonomic filtering, fragmentation, and alteration their journey to become part fossil provide unique information on how plants functioned paleo-ecosystems through traits. Plant traits are measurable morphological, anatomical, physiological, biochemical, or phenological characteristics that potentially affect environment fitness. Here, we review rich literature paleobotany, lens contemporary trait-based ecology, evaluate which well-established extant hold greatest promise for application In particular, focus functional traits, those properties leaf, stem, reproductive, whole fossils offer insights into functioning when alive. The limitations a approach paleobotany considerable. However, our critical assessment over 30 present an initial, semi-quantitative ranking 26 paleo-functional based methodological criteria potential impact Earth system processes, be quantifiable. We demonstrate valuable inferences paleo-ecosystem processes (pollination biology, herbivory), past nutrient cycles, paleobiogeography, paleo-demography (life history), history can derived plants.

Language: Английский

Citations

9
RRphylogeography: A new method to find the area of origin of species and the history of past contacts between species DOI Creative Commons
Alessandro Mondanaro, Silvia Castiglione, Mirko Di Febbraro

et al.

Methods in Ecology and Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract One of the main goals historical biogeography is understanding where species originated, and how climate change ecological interactions shaped their distribution. The task complicated by both active passive mechanisms, including habitat tracking, separation into metapopulations variably interconnected demes, long‐distance dispersal, which may all obscure geographic signature origin. Current tools use phylogenies to infer area origin (AOO). They work discretizing range occupied distinct areas then applying ancestral character estimation identify at speciation. These methods are powerful can account for different modes Yet, they bound assume that discrete currently faithful representation climatic historic affiliation ignore metapopulation structures. Still, most cannot take advantage fossil information or with extinct species. Although explicit bioclimatic modelling now possible under some implementations, these limitations partly unresolved, burdens accuracy AOO process. We present a new tool written in R, named RRphylogeography , meant find species, locate feasible zones contact between throughout history. starts from identifies potential patches during speciation finds likely represent contact. By using virtual simulations, we compared common tools. found statistically outcompetes alternatives study conditions, reaching especially accurate predictions. additionally used investigate complex phylogeographic history polar bear Ursus maritimus . method placed Northern Beringia. Intriguingly, it further shows brown northwestern Europe late Pleistocene Beringia Holocene transition, perfect agreement known hybridization two

Language: Английский

Citations

1
Impact of the EECO on mammalian faunas: New Ypresian localities from Montpellier (France), a multidisciplinary approach DOI Creative Commons
Fabrice Lihoreau, Johan Yans, Mohamed Benammi

et al.

Proceedings of the Geologists Association, Journal Year: 2025, Volume and Issue: unknown, P. 101092 - 101092

Published: Feb. 1, 2025

Language: Английский

Citations

1
Carbon dioxide storage in magmatic rocks: Review and perspectives DOI
Lu Song,

Chenlin Hu,

Xiangyan Wang

et al.

Renewable and Sustainable Energy Reviews, Journal Year: 2024, Volume and Issue: 202, P. 114728 - 114728

Published: July 6, 2024

Language: Английский

Citations

6
Deep carbon recycling viewed from global plate tectonics DOI Creative Commons
Maoliang Zhang, Sheng Xu, Yuji Sano

et al.

National Science Review, Journal Year: 2024, Volume and Issue: 11(6)

Published: April 12, 2024

ABSTRACT Plate tectonics plays an essential role in the redistribution of life-essential volatile elements between Earth's interior and surface, whereby our planet has been well tuned to maintain enduring habitability over much its history. Here we present overview deep carbon recycling regime modern plate tectonics, with a special focus on convergent margins for assessing global mass balance. The up-to-date flux compilation implies approximate balance outflux subduction influx within uncertainty but remarkably limited return convecting mantle. If correct, would gradually accumulate lithosphere time by (i) massive subsurface storage occurring primarily continental from (ii) persistent surface sinks seafloors sustained high-flux CO2 emissions atmosphere. Further assessment requires updates fluxes subduction-driven paths reduction outflux. From point view, particularly emphasize that reworking is important mechanism remobilizing geologically sequestered crust sub-continental lithospheric In light recent advances, future research suggested better understanding reservoirs, fluxes, mechanisms, climatic effects following integrated methodology observation, experiment, numerical modeling, aim decoding self-regulating Earth system perspective.

Language: Английский

Citations

5
Ice sheet–free West Antarctica during peak early Oligocene glaciation DOI
Johann Philipp Klages, Claus‐Dieter Hillenbrand, Steven M. Bohaty

et al.

Science, Journal Year: 2024, Volume and Issue: 385(6706), P. 322 - 327

Published: July 4, 2024

One of Earth’s most fundamental climate shifts, the greenhouse-icehouse transition 34 million years ago, initiated Antarctic ice sheet buildup, influencing global until today. However, extent during Early Oligocene Glacial Maximum (~33.7 to 33.2 ago) that immediately followed this transition—a critical knowledge gap for assessing feedbacks between permanently glaciated areas and early Cenozoic reorganization—is uncertain. In work, we present shallow-marine drilling data constraining earliest environmental conditions on West Antarctica’s Pacific margin—a key region understanding evolution. These indicate a cool-temperate environment with mild ocean air temperatures prevented Ice Sheet formation. Climate–ice modeling corroborates highly asymmetric sheet, thereby revealing its differential regional response past future climatic change.

Language: Английский

Citations

5