Blar i Bergen Open Research Archive på forfatter "Meckler, Anna Nele"

Viser treff 1-18 av 18

    • Application of Clumped Isotope Thermometry to Benthic Foraminifera 

      Piasecki, Alison; Bernasconi, Stefano M.; Grauel, Anna-Lena; Hannisdal, Bjarte; Ho, Sze Ling; Leutert, Thomas Jan; Marchitto, Thomas M.; Meinicke, Niklas; Tisserand, Amandine Aline; Meckler, Anna Nele (Peer reviewed; Journal article, 2019-04)
      Obtaining absolute temperatures of the ocean in deep time is complicated by the lack of constraints on seawater chemistry. Seawater salinity, carbonate ion concentration, δ18O, and elemental abundance changes may obscure ...

    • Clumped isotope thermometry in bivalve shells: a tool for reconstructing seasonal upwelling 

      Caldarescu, Diana Elena; Sadatzki, Henrik; Dahl, Carin Andersson; Schäfer, Priska; Fortunato, Helena; Meckler, Anna Nele (Journal article; Peer reviewed, 2021)
      Carbonate clumped isotope thermometry is a powerful tool for reconstructing paleotemperature and paleosalinity. Despite its broad application in biotic and abiotic materials, its use in paleoclimate studies has been limited ...

    • “Cold and wet” and “warm and dry” climate transitions at the East Asian summer monsoon boundary during the last deglaciation 

      Yue, Jiaojiao; Xiao, Jule; Wang, Xu; Meckler, Anna Nele; Modestou, Sevasti Eleni; Fan, Jiawei (Journal article; Peer reviewed, 2022)
      Studies on millennial‒centennial abrupt climate events during the last deglaciation have significant relevance to modern-day abrupt and extreme climate changes that are occurring more frequently in the context of global ...

    • Coupled Mg/Ca and Clumped Isotope Measurements Indicate Lack of Substantial Mixed Layer Cooling in the Western Pacific Warm Pool During the Last ∼5 Million Years 

      Meinicke, Niklas; Reimi, Maja A.; Ravelo, A.C.; Meckler, Anna Nele (Journal article; Peer reviewed, 2021)
      The Indo-Pacific Warm Pool (IPWP) plays a crucial role in influencing climate dynamics both in the tropics and globally. Yet, there is an ongoing controversy concerning the evolution of surface temperatures in the IPWP ...

    • Coupled Southern Ocean cooling and Antarctic ice sheet expansion during the middle Miocene 

      Leutert, Thomas Jan; Auderset, Alexandra; Martínez-García, Alfredo; Modestou, Sevasti Eleni; Meckler, Anna Nele (Journal article; Peer reviewed, 2020)
      The middle Miocene climate transition (~14 million years ago) was characterized by a dramatic increase in the volume of the Antarctic ice sheet. The driving mechanism of this transition remains under discussion, with ...

    • The DeepMIP contribution to PMIP4: methodologies for selection, compilation and analysis of latest Paleocene and early Eocene climate proxy data, incorporating version 0.1 of the DeepMIP database 

      Hollis, Christopher J.; Jones, Tom Dunkley; Anagnostou, Eleni; Bijl, Peter K.; Cramwinckel, Margot J.; Cui, Ying; Dickens, Gerald R.; Edgar, Kirsty M.; Eley, Yvette; Evans, David; Foster, Gavin L.; Frieling, Joost; Inglis, Gordon N.; Kennedy, Elizabeth M.; Kozdon, Reinhard; Lauretano, Vittoria; Lear, Caroline H.; Littler, Kate; Lourens, Lucas; Meckler, Anna Nele; Naafs, B. David A.; Pälike, Heiko; Pancost, Richard D.; Pearson, Paul N.; Röhl, Ursula; Royer, Dana L.; Salzmann, Ulrich; Schubert, Brian A.; Seebeck, Hannu; Sluijs, Appy; Speijer, Robert P.; Stassen, Peter; Tierney, Jessica; Tripati, Aradhna; Wade, Bridget; Westerhold, Thomas; Witkowski, Caitlyn; Zachos, James C.; Zhang, Yi Ge; Huber, Matthew; Lunt, Daniel J. (Peer reviewed; Journal article, 2019-07-25)
      The early Eocene (56 to 48 million years ago) is inferred to have been the most recent time that Earth's atmospheric CO2 concentrations exceeded 1000 ppm. Global mean temperatures were also substantially warmer than those ...

    • Evolution of tropical land temperature across the last glacial termination 

      Løland, Marit Holten; Krüger, Yves Stephan; Fernandez, Alvaro; Buckingham, Frances; Carolin, Stacy A.; Sodemann, Harald; Adkins, Jess F.; Cobb, Kim M.; Meckler, Anna Nele (Journal article; Peer reviewed, 2022)
      The tropical West Pacific hosts the warmest part of the surface ocean and has a considerable impact on the global climate system. Reconstructions of past temperature in this region can elucidate climate connections between ...

    • Fault-controlled fluid circulation and diagenesis along basin-bounding fault systems in rifts - Insights from the East Greenland rift system 

      Salomon, Eric; Rotevatn, Atle; Kristensen, Thomas Berg; Grundvåg, Sten-Andreas; Henstra, Gijs Allard; Meckler, Anna Nele; Albert, Richard; Gerdes, Axel (Journal article; Peer reviewed, 2020-11-05)
      In marine rift basins, deep-water clastics (>200 m) in the hanging wall of rift- or basin-bounding fault systems are commonly juxtaposed against crystalline “basement” rocks in the footwall. A distinct feature of such fault ...

    • Hydroclimate variability was the main control on fire activity in northern Africa over the last 50,000 years 

      Moore, Harriet; Crocker, Anya; Belcher, Claire; Meckler, Anna Nele; Osborne, Colin; Beerling, David; Wilson, Paul (Journal article; Peer reviewed, 2022)
      North Africa features some of the most frequently burnt biomes on Earth, including the semi-arid grasslands of the Sahel and wetter savannas immediately to the south. Natural fires are fuelled by rapid biomass production ...

    • InterCarb: A Community Effort to Improve Interlaboratory Standardization of the Carbonate Clumped Isotope Thermometer Using Carbonate Standards 

      Bernasconi, S.M.; Daeron, Mathieu; Bergmann, Kristin D.; Bonifacie, Magali; Meckler, Anna Nele; Affek, H. P.; Anderson, N.; Bajnai, D.; Barkan, E.; Beverly, E.; Blamart, D.; Burgener, L.; Calmels, D.; Chaduteau, C.; Clog, M.; Davidheiser-Kroll, B.; Davies, A.; Dux, F.; Eiler, J.; Elliott, B.; Fetrow, A. C.; Fiebig, J.; Goldberg, S.; Hermoso, M.; Huntington, K. W.; Hyland, E.; Ingalls, M.; Jaggi, M.; John, C. M.; Jost, A. B.; Katz, S.; Kelson, J.; Kluge, T.; Kocken, I. J.; Laskar, A.; Leutert, Thomas Jan; Liang, D.; Lucarelli, J.; Mackey, T. J.; Mangenot, X.; Meinicke, Niklas; Modestou, Sevasti Eleni; Müller, I. A.; Murray, S.; Neary, A.; Packard, N.; Passey, B. H.; Pelletier, E.; Petersen, S.; Piasecki, Alison; Ziegler, M. (Journal article; Peer reviewed, 2021)
      Increased use and improved methodology of carbonate clumped isotope thermometry has greatly enhanced our ability to interrogate a suite of Earth-system processes. However, interlaboratory discrepancies in quantifying ...

    • Limited exchange between the deep Pacific and Atlantic oceans during the warm mid-Pliocene and Marine Isotope Stage M2 “glaciation” 

      Braaten, Anna Hauge; Jakob, Kim A.; Ho, Sze Ling; Friedrich, Oliver; Galaasen, Eirik Vinje; De Schepper, Stijn; Wilson, Paul; Meckler, Anna Nele (Journal article; Peer reviewed, 2023)
      The Piacenzian stage (3.6–2.6 Ma) of the Pliocene is the most recent period where Earth experienced sustained intervals of global warmth analogous to predicted near-future climates. Despite considerable efforts to characterize ...

    • Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa 

      Maccali, Jenny Marianne; Meckler, Anna Nele; Lauritzen, Stein Erik; Brekken, Torill; Rokkan, Helen Aase; Bremer, Alvaro Fernandez; Krüger, Yves Stephan; Adigun, Jane; Affolter, Stéphane; Leuenberger, Markus (Journal article; Peer reviewed, 2023)
      The southern coast of South Africa displays a highly dynamical climate as it is at the convergence of the Atlantic and Indian oceans, and it is located near the subtropical/temperate zone boundary with seasonal influence ...

    • North Atlantic surface ocean warming and salinization in response to middle Eocene greenhouse warming 

      van der Ploeg, Robin; Cramwinckel, Margot J.; Kocken, Ilja J.; Leutert, Thomas Jan; Bohaty, Steven M.; Fokkema, Chris D.; Hull, Pincelli M.; Meckler, Anna 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 (Journal article; Peer reviewed, 2023)
      Quantitative reconstructions of hydrological change during ancient greenhouse warming events provide valuable insight into warmer-than-modern hydrological cycles but are limited by paleoclimate proxy uncertainties. We ...

    • Reducing Uncertainties in Carbonate Clumped Isotope Analysis Through Consistent Carbonate-Based Standardization 

      Bernasconi, Stefano M.; Muller, Inigo A; Bergmann, Kristin D; Breitenbach, Sebastian F.M.; Fernandez, Alvaro; Hodell, David A; Jaggi, Madalina; Meckler, Anna Nele; Millan, Isabel; Ziegler, Martin (Peer reviewed; Journal article, 2018)
      About a decade after its introduction, the field of carbonate clumped isotope thermometry is rapidly expanding because of the large number of possible applications and its potential to solve long‐standing questions in Earth ...

    • Sensitivity of clumped isotope temperatures in fossil benthic and planktic foraminifera to diagenetic alteration 

      Leutert, Thomas Jan; Sexton, Philip; Tripati, Aradhna; Piasecki, Alison; Ho, Sze Ling; Meckler, Anna Nele (Peer reviewed; Journal article, 2019)
      Applying the clumped isotope (Δ47) thermometer to foraminifer microfossils offers the potential to significantly improve paleoclimate reconstructions, owing to its insensitivity to the isotopic composition of seawater ...

    • Stable Biological Production in the Eastern Equatorial Pacific Across the Plio-Pleistocene Transition (∼3.35–2.0 Ma) 

      Jakob, Kim A.; Ho, Sze Ling; Meckler, Anna Nele; Pross, Jörg; Fiebig, Jens; Keppler, Frank; Friedrich, Oliver (Journal article; Peer reviewed, 2021)
      Upwelling within the Eastern Equatorial Pacific (EEP) Ocean is a key factor for the Earth's climate because it supports >10% of the present-day biological production. The dynamics of upwelling in the EEP across the ...

    • Transient Deep Ocean Cooling in the Eastern Equatorial Pacific Ocean at the Eocene-Oligocene Transition 

      Taylor, Victoria Emma; Wilson, P.A.; Bohaty, S.M.; Meckler, Anna Nele (Journal article; Peer reviewed, 2023)
      At the Eocene-Oligocene Transition (EOT), approximately 34 million years ago, Earth abruptly transitioned to a climate state sufficiently cool for Antarctica to sustain large ice sheets for the first time in tens to hundreds ...

    • Warm Middle Miocene Indian Ocean Bottom Water Temperatures: Comparison of Clumped Isotope and Mg/Ca‐Based Estimates 

      Modestou, Sevasti Eleni; Leutert, Thomas Jan; Bremer, Alvaro Fernandez; Lear, Caroline H.; Meckler, Anna Nele (Journal article; Peer reviewed, 2020)
      The middle Miocene is an important analogue for potential future warm climates. However, few independent deep ocean temperature records exist, though these are important for climate model validation and estimates of changes ...