9th International Carbon Dioxide Conference (ICDC9) Editor(s): L. Bopp, V. Brovkin, J. Canadell, C. Gerbig, D. Griffith, M. Heimann, R. Keeling, Y. Luo, A. C. Manning, A. Michalak, Z. Xie, and N. Zeng Special issue jointly organized between Earth System Dynamics, Atmospheric Chemistry and Physics, Atmospheric Measurement Techniques, and Biogeosciences
The International Carbon Dioxide Conference (ICDC) is the single largest conference organized by the global research community every four years to present the latest scientific findings on the science of the carbon cycle and its perturbation by human activities. The ICDC in 2013 is the 9th conference. The conference topics encompass the global carbon cycle, global and regional budgets, and processes with specialized sessions on the individual components of atmosphere, ocean and land, in the timeframes of past, present and future. It covers both fundamental science advancement and discovery, the generation of policy relevant information, and new technological observational platforms, datasets, and modeling approaches.
The three main themes of the conference are:
Theme 1: Past and present changes and variability
Theme 2: Carbon sources and sinks, their changes and trends
Theme 3: Future of the carbon cycle: drivers, vulnerabilities, feedbacks and management options
Estimating Asian terrestrial carbon fluxes from CONTRAIL aircraft and surface CO2 observations for the period 2006–2010
H. F. Zhang, B. Z. Chen, T. Machida, H. Matsueda, Y. Sawa, Y. Fukuyama, R. Langenfelds, M. van der Schoot, G. Xu, J. W. Yan, M. L. Cheng, L. X. Zhou, P. P. Tans, and W. Peters Atmos. Chem. Phys., 14, 5807-5824, 2014 AbstractFinal Revised Paper (PDF, 3080 KB)Supplement (361 KB)Discussion Paper (ACPD)
11 Jun 2014
Quantifying the biophysical climate change mitigation potential of Canada's forest sector
Simulating the integrated summertime Δ14CO2 signature from anthropogenic emissions over Western Europe
D. Bozhinova, M. K. van der Molen, I. R. van der Velde, M. C. Krol, S. van der Laan, H. A. J. Meijer, and W. Peters Atmos. Chem. Phys., 14, 7273-7290, 2014 AbstractFinal Revised Paper (PDF, 3707 KB)Discussion Paper (ACPD)
17 Jul 2014
High-precision quasi-continuous atmospheric greenhouse gas measurements at Trainou tower (Orléans forest, France)
M. Schmidt, M. Lopez, C. Yver Kwok, C. Messager, M. Ramonet, B. Wastine, C. Vuillemin, F. Truong, B. Gal, E. Parmentier, O. Cloué, and P. Ciais Atmos. Meas. Tech., 7, 2283-2296, 2014 AbstractFinal Revised Paper (PDF, 2008 KB)Discussion Paper (AMTD)
30 Jul 2014
Interannual sea–air CO2 flux variability from an observation-driven ocean mixed-layer scheme
Impacts of freezing and thawing dynamics on foliar litter carbon release in alpine/subalpine forests along an altitudinal gradient in the eastern Tibetan Plateau
Summary: A 2-year field litter decomposition experiment was conducted along an altitudinal gradient in the eastern Tibetan Plateau. More rapid 2-year C is released from fresh foliar litter at upper elevations compared to lower elevations. However, high C release was observed at low altitudes during winter, but high altitudes exhibited high C release during growing season. The results suggested that the onset of C release in fresh litter could delay in this cold region in the scenario of climate warming.
W. Fuzhong, P. Changhui, Z. Jianxiao, Z. Jian, T. Bo, and Y. Wanqin Biogeosciences, 11, 6471-6481, 2014 Abstract
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Continued increase in atmospheric CO2 seasonal amplitude in the 21st century projected by the CMIP5 Earth system models
Summary: This paper presents the CMIP5 model predictions on the seasonal characteristics of global carbon cycle. We show a model consensus that the amplitude of this seasonal cycle will increase in the future under the RCP8.5 emission scenario. This is mostly due to enhanced ecosystem productivity in high latitude regions. While the models' ensemble CO2 amplitude increase is close to observation, our results suggest the underlying mechanisms may not be realistic.
Using atmospheric observations to evaluate the spatiotemporal variability of CO2 fluxes simulated by terrestrial biospheric models
Summary: Terrestrial biospheric models (TBMs) are used to assess carbon--climate interactions. We present a new and complementary approach for evaluating the spatiotemporal patterns, rather than magnitudes, of biosphere--atmosphere carbon exchange predicted by TBMs, based on atmospheric observations. Experiments demonstrate that the performance of TBMs varies substantially across seasons and biomes, with best performance during the growing season and more limited skill during transition seasons.
A joint data assimilation system (Tan-Tracker) to simultaneously estimate surface CO2 fluxes and 3-D atmospheric CO2 concentrations from observations
Summary: A new carbon cycle data assimilation system (Tan-Tracker) is developed based on an advanced hybrid assimilation approach, as a part of the preparation for the launch of the Chinese carbon dioxide observation satellite (TanSat). Tan-Tracker adopts a joint data assimilation framework to simultaneously estimate CO2 concentrations and CFs and thus gradually reduce the uncertainty in the CO2 concentration evolution through continuously fitting model CO2 concentration simulations to the observations.