Search Results - "Penman, E"

Rapid and sustained surface ocean acidification during the Paleocene-Eocene Thermal Maximum by Penman, Donald E., Hönisch, Bärbel, Zeebe, Richard E., Thomas, Ellen, Zachos, James C.

“…The Paleocene‐Eocene Thermal Maximum (PETM) has been associated with the release of several thousands of petagrams of carbon (Pg C) as methane and/or carbon…”
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New constraints on massive carbon release and recovery processes during the Paleocene-Eocene Thermal Maximum by Penman, Donald E, Zachos, James C

“…Recent geochemical and sedimentological evidence constrains the response of seawater chemistry to carbon injection during the Paleocene-Eocene Thermal Maximum…”
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Biogeochemical significance of pelagic ecosystem function: an end-Cretaceous case study by Henehan, Michael J., Hull, Pincelli M., Penman, Donald E., Rae, James W. B., Schmidt, Daniela N.

“…Pelagic ecosystem function is integral to global biogeochemical cycling, and plays a major role in modulating atmospheric CO2 concentrations (pCO2)…”
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Capturing the global signature of surface ocean acidification during the Palaeocene-Eocene Thermal Maximum by Babila, Tali L., Penman, Donald E., Hönisch, Bärbel, Kelly, D. Clay, Bralower, Timothy J., Rosenthal, Yair, Zachos, James C.

“…Geologically abrupt carbon perturbations such as the Palaeocene-Eocene Thermal Maximum (PETM, approx. 56 Ma) are the closest geological points of comparison to…”
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Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth by Isson, Terry T., Zhang, Shuang, Lau, Kimberly V., Rauzi, Sofia, Tosca, Nicholas J., Penman, Donald E., Planavsky, Noah J.

“…In the wake of rapid CO 2 release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years during the…”
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North Atlantic marine biogenic silica accumulation through the early to middle Paleogene: implications for ocean circulation and silicate weathering feedback by Witkowski, Jakub, Brylka, Karolina, Bohaty, Steven M, Mydlowska, Elżbieta, Penman, Donald E, Wade, Bridget S

“…The Paleogene history of biogenic opal accumulation in the North Atlantic provides insight into both the evolution of deepwater circulation in the Atlantic…”
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Boron, carbon, and oxygen isotopic composition of brachiopod shells: Intra-shell variability, controls, and potential as a paleo-pH recorder by Penman, Donald E., Hönisch, Bärbel, Rasbury, E. Troy, Hemming, N. Gary, Spero, Howard J.

“…The boron isotopic composition of biogenic carbonates has been used to reconstruct seawater pH and atmospheric pCO2 on Pleistocene and Cenozoic timescales…”
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Boric acid and borate incorporation in inorganic calcite inferred from B/Ca, boron isotopes and surface kinetic modeling by Farmer, Jesse R., Branson, Oscar, Uchikawa, Joji, Penman, Donald E., Hönisch, Bärbel, Zeebe, Richard E.

“…The boron concentration (B/Ca ratio) and isotopic composition (δ11B) of biogenic calcite are widely applied to reconstruct past changes in seawater carbonate…”
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Experimental evidence for kinetic effects on B/Ca in synthetic calcite: Implications for potential B(OH)4− and B(OH)3 incorporation by Uchikawa, Joji, Penman, Donald E., Zachos, James C., Zeebe, Richard E.

“…The boron to calcium ratio (B/Ca) in biogenic CaCO3 is being increasingly utilized as a proxy for past ocean carbonate chemistry. However, B/Ca of cultured and…”
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Enhanced metamorphic CO 2 release on the Proterozoic Earth by Stewart, E M, Penman, Donald E

“…Rock metamorphism releases substantial CO over geologic timescales (>1 My), potentially driving long-term planetary climate trends. The nature of carbonate…”
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Pliocene decoupling of equatorial Pacific temperature and pH gradients by Shankle, Madison G., Burls, Natalie J., Fedorov, Alexey V., Thomas, Matthew D., Liu, Wei, Penman, Donald E., Ford, Heather L., Jacobs, Peter H., Planavsky, Noah J., Hull, Pincelli M.

“…Ocean dynamics in the equatorial Pacific drive tropical climate patterns that affect marine and terrestrial ecosystems worldwide. How this region will respond…”
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An abyssal carbonate compensation depth overshoot in the aftermath of the Palaeocene–Eocene Thermal Maximum by Penman, Donald E., Turner, Sandra Kirtland, Sexton, Philip F., Norris, Richard D., Dickson, Alexander J., Boulila, Slah, Ridgwell, Andy, Zeebe, Richard E., Zachos, James C., Cameron, Adele, Westerhold, Thomas, Röhl, Ursula

“…The Palaeocene–Eocene Thermal Maximum was associated with a massive release of carbon. Marine sediments suggest a temporary deepening of the calcite…”
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Sensitivity of ocean circulation to warming during the Early Eocene greenhouse by Kirtland Turner, Sandra, Ridgwell, Andy, Keller, Allison L, Vahlenkamp, Maximilian, Aleksinski, Adam K, Sexton, Philip F, Penman, Donald E, Hull, Pincelli M, Norris, Richard D

“…Multiple abrupt warming events ("hyperthermals") punctuated the Early Eocene and were associated with deep-sea temperature increases of 2 to 4 °C, seafloor…”
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Neoproterozoic syn‐glacial carbonate precipitation and implications for a snowball Earth by Hood, Ashleigh v. S., Penman, Donald E., Lechte, Maxwell A., Wallace, Malcolm W., Giddings, Jonathan A., Planavsky, Noah J.

“…The Neoproterozoic ‘snowball Earth’ hypothesis suggests that a runaway ice–albedo feedback led to two intense glaciations around 717–635 million years ago, and…”
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Revisiting the Middle Eocene Climatic Optimum “Carbon Cycle Conundrum” With New Estimates of Atmospheric pCO2 From Boron Isotopes by Henehan, Michael J., Edgar, Kirsty M., Foster, Gavin L., Penman, Donald E., Hull, Pincelli M., Greenop, Rosanna, Anagnostou, Eleni, Pearson, Paul N.

“…The Middle Eocene Climatic Optimum (MECO) was a gradual warming event and carbon cycle perturbation that occurred between 40.5 and 40.1 Ma. A number of…”
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Timing of Eocene compressional plate failure during subduction initiation, northern Zealandia, southwestern Pacific by Stratford, W R, Sutherland, R, Dickens, G R, Blum, P, Collot, J, Gurnis, M, Saito, S, Bordenave, A, Etienne, S J G, Agnini, C, Alegret, L, Asatryan, G, Bhattacharya, J, Chang, L, Cramwinckel, M J, Dallanave, E, Drake, M K, Giorgioni, M, Harper, D T, Huang, H H M, Keller, A L, Lam, A R, Li, H, Matsui, H, Morgans, H E G, Newsam, C, Park, Y-H, Pascher, K M, Pekar, S F, Penman, D E, Westerhold, T, Zhou, X

“…SUMMARY Rapid onset of subduction tectonics across the western Pacific convergent margins in the early Eocene was followed by a slower phase of margin growth…”
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Surface ocean warming and acidification driven by rapid carbon release precedes Paleocene-Eocene Thermal Maximum by Babila, Tali L, Penman, Donald E, Standish, Christopher D, Doubrawa, Monika, Bralower, Timothy J, Robinson, Marci M, Self-Trail, Jean M, Speijer, Robert P, Stassen, Peter, Foster, Gavin L, Zachos, James C

“…The Paleocene-Eocene Thermal Maximum (PETM) is recognized by a major negative carbon isotope (δ C) excursion (CIE) signifying an injection of isotopically…”
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Bentho‐Pelagic Decoupling: The Marine Biological Carbon Pump During Eocene Hyperthermals by Griffith, Elizabeth M., Thomas, Ellen, Lewis, Angela R., Penman, Donald E., Westerhold, Thomas, Winguth, Arne M. E.

“…Future environmental change may profoundly affect oceanic ecosystems in a complex way, due to the synergy between rising temperatures, reduction in mixing and…”
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Atlantic Deep‐Sea Cherts Associated With Eocene Hyperthermal Events by Penman, Donald E., Keller, Allison, D'haenens, Simon, Kirtland Turner, Sandra, Hull, Pincelli M.

“…Chert, porcelainite, and other siliceous phases are exceptionally common in Atlantic sedimentary records of the early Eocene, but the origins of these facies…”
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North Atlantic surface ocean warming and salinization in response to middle Eocene greenhouse warming by van der Ploeg, Robin, Cramwinckel, Marlow J, Kocken, Ilja J, Leutert, Thomas J, Bohaty, Steven M, Fokkema, Chris D, Hull, Pincelli M, Meckler, A Nele, Middelburg, Jack J, Müller, Inigo A, Penman, Donald E, Peterse, Francien, Reichart, Gert-Jan, Sexton, Philip F, Vahlenkamp, Maximilian, De Vleeschouwer, David, Wilson, Paul A, Ziegler, Martin, Sluijs, Appy

“…Quantitative reconstructions of hydrological change during ancient greenhouse warming events provide valuable insight into warmer-than-modern hydrological…”
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