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., 2002; Rödenbeck et al., 2003) , or on "bottom-up" methods that rely on data-driven gridded products derived from the upscaling of flux data (Jung et al., 2011 (Jung et al., , 2017 Papale et al., 2015 ... Maire et al., 2010) and the Jena CarboScope Inversion top-down product, which estimates land (and ocean) fluxes from atmospheric CO 2 concentration measurements and atmospheric transport modelling (Rödenbeck ...doi:10.5194/bg-14-3815-2017 fatcat:7haen325pba5zdfrjuqe73fuby
., 2002; Rödenbeck et al., 2003) , or on "bottom-up" methods that rely on data-driven gridded products derived from the upscaling of flux data (Jung et al., 2011 (Jung et al., , 2017 Papale et al., 2015 ... Maire et al., 2010) and the Jena CarboScope Inversion top-down product, which estimates land (and ocean) fluxes from atmospheric CO 2 concentration measurements and atmospheric transport modelling (Rödenbeck ...doi:10.5194/bg-2017-11 fatcat:6p6wlvbuv5ffnmwybovo4aafcm
The Jena CarboScope database can be found at http://www.bgc-jena.mpg.de/CarboScope/ (Rödenbeck et al., 2003) . ... Materials and methods Datasets Gridded global flux estimates were obtained from the topdown product Jena CarboScope CO 2 Inversion (version s85_v4.1, 21 atmospheric sites) (Rödenbeck et al., 2003) . ...doi:10.5194/bg-17-2365-2020 fatcat:lxhu3mwnj5cgbeizjgobgyz4y4
the Rödenbeck et al. pCO 2 just ignore land barriers. ... Average regional differences between MLR 1 and gridded SOCAT v5 data, the Rödenbeck map and gridded SOCAT v5 data, MLR 1 and the Rödenbeck map, and MLR 3 and the gridded SOCAT v5 data (from left to right ...doi:10.5194/bg-18-1127-2021 fatcat:julx7w2qpfbo7jj3d27y3kq5du
anthropogenic "disturbance" is superimposed on relatively large and strongly variable natural fluxes of CO 2 between the atmosphere, the terrestrial biosphere, and the oceans (Bousquet et al. 2000; Rödenbeck ...doi:10.1007/s00114-007-0313-4 pmid:17938872 pmcid:PMC2755783 fatcat:db6nons5zvanpdpyk3jvfviitu
A B S T R A C T We used observed and simulated atmospheric potential oxygen (APO) to evaluate simulated air-sea flux fields from 11 ocean global carbon cycle models. APO is defined in terms of atmospheric CO 2 , O 2 and N 2 so as not to depend on terrestrial photosynthesis and respiration. Hence, it is in principal suited to evaluate simulated air-sea fluxes of these gases. We forced two different atmospheric transport models, TM2 and TM3, with simulated air-sea fluxes from each of the 11 oceandoi:10.3402/tellusb.v59i1.16975 fatcat:zwsfmpsvfjgilhow4s4pdhzv7m
more »... models, and we compared resulting simulated latitudinal and seasonal variations in APO with observations. Differences between the two atmospheric transport models, which offer a first estimate of uncertainty due to atmospheric transport, are similar in magnitude to the average model-data differences and to the spread between the ocean models. Simulated annual mean meridional APO profiles qualitatively resemble the observations, although at individual stations there remain substantial differences between models and observations. The simulated amplitude of the seasonal APO variability was generally less than observed. We conclude that it is difficult to validate ocean models based on APO because shortcomings in atmospheric transport models and problems with data representativity cannot be distinguished from ocean model deficiencies.
, 2005; Rödenbeck et al., 73 2003). ... ., , 2010 Rödenbeck, 2005; Rödenbeck et al., 2003) . We focus on seasonal patterns in the land carbon 61 uptake during 2015, relative to the long-term trend of 1981-2015. ...doi:10.5194/acp-2016-1167 fatcat:bika3lqpfza2feqiz7dsyqn5jy
In systems with timescale separation, where the fast degrees of freedom exhibit chaotic motion, the latter are replaced by suitable stochastic processes. A projection technique is employed to derive equations of motion for the phase space density of the slow variables by eliminating the fast ones. The resulting equations can be approximated in a controlled way by Fokker-Planck equations or equivalently by stochastic differential equations for slow degrees of freedom. We discuss some modeldoi:10.1088/0305-4470/34/15/302 fatcat:didm2qufofa7fp2tfuipvixtya
more »... ions and explore the accuracy of the approximations by numerical simulations.
Background The climate mitigation target of limiting the temperature increase below 2 °C above the pre-industrial levels requires the efforts from all countries. Tracking the trajectory of the land carbon sink efficiency is thus crucial to evaluate the nationally determined contributions (NDCs). Here, we define the instantaneous land sink efficiency as the ratio of natural land carbon sinks to emissions from fossil fuel and land-use and land-cover change with a value of 1 indicating carbondoi:10.1186/s13021-021-00178-3 pmid:33973052 fatcat:7kfo2xom2nhmzlpacxcrtfy45y
more »... ality to track its temporal dynamics in the past decades. Results Land sink efficiency has been decreasing during 1957–1990 because of the increased emissions from fossil fuel. After the effect of the Mt. Pinatubo eruption diminished (after 1994), the land sink efficiency firstly increased before 2009 and then began to decrease again after 2009. This reversal around 2009 is mostly attributed to changes in land sinks in tropical regions in response to climate variations. Conclusions The decreasing trend of land sink efficiency in recent years reveals greater challenges in climate change mitigation, and that climate impacts on land carbon sinks must be accurately quantified to assess the effectiveness of regional scale climate mitigation policies.
The KATRIN experiment aims at measuring the electron neutrino mass with a sensitivity of 0.2 eV/c^2 after five years of data taking. Recently a new upper limit for the neutrino mass of 0.8 eV/c^2 (90 reach the design sensitivity, a reduction of the background rate by one order of magnitude is required. The shifted analysing plane (SAP) configuration exploits a specific shaping of the electric and magnetic fields in the KATRIN main spectrometer to reduce the spectrometer background by a factorarXiv:2201.11743v1 fatcat:cnoxy6trezcdxiccpmkjpvun7y
more »... two. We discuss the general idea of the SAP configuration and describe the main features of this novel measurement mode.
This notion is supported by the finding that the NEE-T inversion possesses predictive skill on the time scale of El Niño / Southern Oscillation (Rödenbeck et al., 2018) . ... Ocean fluxes are fixed to the flux estimates oc_v1.5 (update of Rödenbeck et al., 2014) based on an interpolation of pCO 2 data from the SOCATv5 data base (Bakker et al., 2016) . ...doi:10.5194/bg-2018-34 fatcat:yvljrdo5u5baffjuz6wigiu4ye
et al. (2018 Rödenbeck et al. ( ) for runs over 1957 . ... Method The standard inversion As a starting point, we use the existing Bayesian atmospheric CO 2 inversion implemented in the Jena CarboScope, run s85oc_v4.1s (update of Rödenbeck et al., 2003; Rödenbeck ...doi:10.5194/bg-15-2481-2018 fatcat:2vrifzzaovc3pjnrwtjrrjuvfq
This underestimate is in agreement with a previous comparison of the atmospheric inversion APO results to an earlier generation ocean model [Rödenbeck et al., 2008] . ... We evaluate the contributions of F O2 and F CO2 to APO variability, by computing the air-sea flux of APO (F APO ), following Rödenbeck et al.  , as F APO ¼ F O2 þ 1:1ÁF CO2 À X O2 X N2 F N2 ; (3 ...doi:10.1002/2017gb005630 fatcat:l7zvtwozwvfndl2lssyeabpd2e
Rödenbeck et al., 2003) . However, the inversion technique cannot directly attribute these signals to mechanisms. ... In Rödenbeck et al. (2003) , a priori information consisted of statistics of anthropogenic emissions from fossil fuel burning and cement manufacturing (Olivier & Berdowski, 2001) , climatological NEE ...doi:10.1111/j.1365-2486.2006.01223.x fatcat:vpqe2kbnvvftnab7e5s7h3lm3y
The mixed-layer scheme and inversion data supporting the main findings can be obtained from www.bgc-jena.mpg.de/~christian. roedenbeck/download-CO2-ocean/ and www.bgc-jena.mpg.de/ christian.roedenbeck/ ...doi:10.1126/science.aab2620 pmid:26359401 fatcat:mmbm7bycxbb3fbyqq2jcio3jf4
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