Journal ArticleDOI
Radiocarbon observations in atmospheric CO2: determining fossil fuel CO2 over Europe using Jungfraujoch observations as background.
TLDR
Strong seasonal variations of the fossil fuel CO2 offsets indicate a strong seasonality of emissions but also of atmospheric dilution of ground level emissions by vertical mixing.About:
This article is published in Science of The Total Environment.The article was published on 2008-03-01. It has received 208 citations till now.read more
Citations
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Journal ArticleDOI
Methods and code for 'classical' age-modelling of radiocarbon sequences.
TL;DR: In this article, an alternative method based on importance sampling through calibrated dates is proposed, which works with calibrated radiocarbon as well as other dates, and provides a simple, systematic, transparent, documented and customizable alternative.
Journal ArticleDOI
When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal
Jan Zalasiewicz,Colin N. Waters,Mark Williams,Anthony D. Barnosky,Alejandro Cearreta,Paul J. Crutzen,Erle C. Ellis,Michael A. Ellis,Ian J. Fairchild,Jacques Grinevald,Peter K. Haff,Irka Hajdas,Reinhold Leinfelder,John Robert McNeill,Eric O. Odada,Clément Poirier,Daniel Richter,Will Steffen,Colin Summerhayes,James P. M. Syvitski,Davor Vidas,Michael Wagreich,Scott L. Wing,Alexander P. Wolfe,Zhisheng An,Naomi Oreskes +25 more
TL;DR: In this article, the boundary of the Anthropocene geological time interval as an epoch is defined as the time of the first nuclear bomb explosion, on July 16th 1945 at Alamogordo, New Mexico; additional bombs were detonated at the average rate of one every 9.6 days until 1988 with attendant worldwide fallout easily identifiable in the chemostratigraphic record.
Journal ArticleDOI
Seasonal dynamics and age of stemwood nonstructural carbohydrates in temperate forest trees
Andrew D. Richardson,Mariah S. Carbone,Trevor F. Keenan,Claudia I. Czimczik,David Y. Hollinger,Paula Murakami,Paul G. Schaberg,Xiaomei Xu +7 more
TL;DR: A two-pool (fast and slow cycling reserves) model structure gave reasonable estimates of the size and mean residence time of the total NSC pool, and greatly improved model predictions of interannual variability in woody biomass increment, compared with zero- or one-pool structures used in the majority of existing models.
Journal ArticleDOI
Observations and modelling of the global distribution and long-term trend of atmospheric 14CO2
Ingeborg Levin,Tobias Naegler,Bernd Kromer,Moritz Diehl,Roger J. Francey,A. J. Gomez-Pelaez,L. Paul Steele,Dietmar Wagenbach,Rolf Weller,Douglas E. J. Worthy +9 more
TL;DR: In this paper, high-precision atmospheric Δ 14 CO 2 records covering the last two decades are presented, and evaluated in terms of changing (radio)carbon sources and sinks, using the coarse-grid carbon cycle model GRACE.
Journal ArticleDOI
Fossil and non-fossil sources of organic carbon (OC) and elemental carbon (EC) in Göteborg, Sweden
Sönke Szidat,Sönke Szidat,Matthias Ruff,Matthias Ruff,N. Perron,Lukas Wacker,Hans-Arno Synal,Mattias Hallquist,Ardhendu Sekhar Shannigrahi,Karl Espen Yttri,Christian Dye,David Simpson,David Simpson +12 more
TL;DR: In this article, the authors analyzed 14C data collected at an urban site in Goteborg (Sweden) in February/March 2005 and in June/July 2006 to distinguish fossil from non-fossil emissions.
References
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Journal ArticleDOI
Characterizing aquatic dissolved organic matter.
Minze Stuiver,Henry Polach +1 more
TL;DR: In this article, standards for reporting C-14 age determinations are discussed, and the statistical uncertainty (plus or minus one standard deviation) expresses counting errors, inaccuracies in voltage, pressure, temperature, dilution, and should include errors in C-13 ratios.
Journal ArticleDOI
The Tropospheric 14CO2 Level in Mid-Latitudes of the Northern Hemisphere (1959–2003)
Ingeborg Levin,Bernd Kromer +1 more
TL;DR: A comprehensive tropospheric (super 14) CO (sub 2) data set of quasi-continuous observations covering the time span from 1959 to 2003 is presented in this article, where samples were collected at 3 European mountain sites at height levels of 1205 m (Schauinsland), 1800 m (Vermunt), and 3450 m asl (Jungfraujoch).
Journal ArticleDOI
Radiocarbon - a unique tracer of global carbon cycle dynamics
Ingeborg Levin,Vago Hesshaimer +1 more
TL;DR: The role of the terrestrial biosphere as a sink of anthropogenic CO2 emissions is still poorly understood as discussed by the authors, however, it is known that the world oceans are the most important carbon reservoir, with a buffering capacity for atmospheric CO2 largest on time scales of centuries and longer.
Journal ArticleDOI
A novel approach for independent budgeting of fossil fuel CO2 over Europe by 14CO2 observations
TL;DR: In this paper, the Radon-Tracer-Method is applied to quantify fossil fuel derived CO2 concentrations at a regional polluted site, and at a continental mountain station in south-west Germany.
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The Tropospheric 14CO2 Level in Mid-Latitudes of the Northern Hemisphere (1959–2003)
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