Articles | Volume 11, issue 12
https://doi.org/10.5194/bg-11-3245-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-11-3245-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
17 Jun 2014
Research article |
| 17 Jun 2014
An inverse modeling approach for tree-ring-based climate reconstructions under changing atmospheric CO2 concentrations
É. Boucher
Dept of Geography and GEOTOP, Université du Québec à Montréal, Montréal, Canada
CEREGE, Aix-Marseille Université CNRS UMR7330, Europôle de l'Arbois, 13545 Aix-en-Provence, France
LSCE-IPSL, UMR CEA-CNRS-UVSQ 8212, 12, L'Orme des Merisiers, 91191 Gif-sur-Yvette, France
V. Daux
LSCE-IPSL, UMR CEA-CNRS-UVSQ 8212, 12, L'Orme des Merisiers, 91191 Gif-sur-Yvette, France
P.-A. Danis
Onema-Irstea Hydro-écologie Plans d’Eau, 3275 Route de Cézanne, CS 40061, 13182 Aix-en-Provence, France
P. Dussouillez
CEREGE, Aix-Marseille Université CNRS UMR7330, Europôle de l'Arbois, 13545 Aix-en-Provence, France
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A high-resolution dynamical model was used to give the first simulation of the distribution of natural and anthropogenic radiocarbon (14C) across the whole Mediterranean Sea. The model correctly simulates the main features of 14C distribution during and after the bomb perturbation. The results demonstrate the major influence of the flux of Atlantic water through the Strait of Gibraltar, and a significant increase in 14C in the Aegean deep water during the Eastern Mediterranean Transient event.
Thomas C. Brachert, Markus Reuter, Stefan Krüger, James S. Klaus, Kevin Helmle, and Janice M. Lough
Biogeosciences, 13, 4513–4532, https://doi.org/10.5194/bg-13-4513-2016, https://doi.org/10.5194/bg-13-4513-2016, 2016
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We have analysed the rate of calcification of fossil reef corals. These measurements are important, because the rate of formation of the skeleton depends on the physical environment in which the corals lived. The rates of skeletal calcification of the fossils were approximately 50 % lower than they are in extant reef corals. This is a likely effect of high water temperatures and/or low carbonate saturation of the water – factors that will also affect coral growth by future global warming.
Jennifer R. Marlon, Ryan Kelly, Anne-Laure Daniau, Boris Vannière, Mitchell J. Power, Patrick Bartlein, Philip Higuera, Olivier Blarquez, Simon Brewer, Tim Brücher, Angelica Feurdean, Graciela Gil Romera, Virginia Iglesias, S. Yoshi Maezumi, Brian Magi, Colin J. Courtney Mustaphi, and Tonishtan Zhihai
Biogeosciences, 13, 3225–3244, https://doi.org/10.5194/bg-13-3225-2016, https://doi.org/10.5194/bg-13-3225-2016, 2016
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We reconstruct spatiotemporal variations in biomass burning since the Last Glacial Maximum (LGM) using the Global Charcoal Database version 3 (including 736 records) and a method to grid the data. LGM to late Holocene burning broadly tracks global and regional climate changes over that interval. Human activities increase fire in the 1800s and then reduce it for most of the 20th century. Burning is now rapidly increasing, particularly in western North America and southeastern Australia.
Giovanni Zanchetta, Eleonora Regattieri, Biagio Giaccio, Bernd Wagner, Roberto Sulpizio, Alex Francke, Hendrik Vogel, Laura Sadori, Alessia Masi, Gaia Sinopoli, Jack H. Lacey, Melanie J. Leng, and Niklas Leicher
Biogeosciences, 13, 2757–2768, https://doi.org/10.5194/bg-13-2757-2016, https://doi.org/10.5194/bg-13-2757-2016, 2016
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Chronology is fundamental in paleoclimatology for understanding timing of events and their origin. In this paper we try to obtain a more detailed chronology for the interval comprised between ca. 140 and 70 ka for the DEEP core in Lake Ohrid using regional independently-dated archives (i.e. speleothems and/or lacustrine succession with well-dated volcanic layers). This allows to insert the DEEP chronology within a common chronological frame between different continental and marine proxy records.
Janna Just, Norbert R. Nowaczyk, Leonardo Sagnotti, Alexander Francke, Hendrik Vogel, Jack H. Lacey, and Bernd Wagner
Biogeosciences, 13, 2093–2109, https://doi.org/10.5194/bg-13-2093-2016, https://doi.org/10.5194/bg-13-2093-2016, 2016
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The magnetic record from Lake Ohrid reflects a strong change in geochemical conditions in the lake. Before 320 ka glacial sediments contain iron sulfides, while later glacials are dominated by siderite. Superimposed on this large-scale pattern are climatic induced changes in the magnetic mineralogy. Glacial and stadial sediments are characterized by relative increases of high- vs. low-coercivity minerals which relate to enhanced erosion in the catchment, possibly due to a sparse vegetation.
T. Denk, G. W. Grimm, F. Grímsson, and R. Zetter
Biogeosciences, 10, 7927–7942, https://doi.org/10.5194/bg-10-7927-2013, https://doi.org/10.5194/bg-10-7927-2013, 2013
M. Claussen, K. Selent, V. Brovkin, T. Raddatz, and V. Gayler
Biogeosciences, 10, 3593–3604, https://doi.org/10.5194/bg-10-3593-2013, https://doi.org/10.5194/bg-10-3593-2013, 2013
M.-N. Woillez, M. Kageyama, N. Combourieu-Nebout, and G. Krinner
Biogeosciences, 10, 1561–1582, https://doi.org/10.5194/bg-10-1561-2013, https://doi.org/10.5194/bg-10-1561-2013, 2013
G. Yu, X. Ke, H. D. Shen, and Y. F. Li
Biogeosciences, 10, 1441–1449, https://doi.org/10.5194/bg-10-1441-2013, https://doi.org/10.5194/bg-10-1441-2013, 2013
R. Touchan, V. V. Shishov, D. M. Meko, I. Nouiri, and A. Grachev
Biogeosciences, 9, 965–972, https://doi.org/10.5194/bg-9-965-2012, https://doi.org/10.5194/bg-9-965-2012, 2012
A. Sluijs and H. Brinkhuis
Biogeosciences, 6, 1755–1781, https://doi.org/10.5194/bg-6-1755-2009, https://doi.org/10.5194/bg-6-1755-2009, 2009
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