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Relevant bibliographies by topics / ORCHIDEE and LMDZ models

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Academic literature on the topic 'ORCHIDEE and LMDZ models'

Author: Grafiati

Published: 31 August 2024

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Journal articles on the topic "ORCHIDEE and LMDZ models"

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Delire, Christine, Nathalie de Noblet-Ducoudré, Adriana Sima, and Isabelle Gouirand. "Vegetation Dynamics Enhancing Long-Term Climate Variability Confirmed by Two Models." Journal of Climate 24, no. 9 (2011): 2238–57. http://dx.doi.org/10.1175/2010jcli3664.1.

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Abstract Two different coupled climate–vegetation models, the Community Climate Model version 3 coupled to the Integrated Biosphere Simulator (CCM3–IBIS) and the Laboratoire de Météorologie Dynamique’s climate model coupled to the Organizing Carbon and Hydrology in Dynamic Ecosystems model (LMDz–ORCHIDEE), are used to study the effects of vegetation dynamics on climate variability. Two sets of simulations of the preindustrial climate are performed using fixed climatological sea surface temperatures: one set taking into account vegetation cover dynamics and the other keeping the vegetation cove

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Bacour, Cédric, Natasha MacBean, Frédéric Chevallier, Sébastien Léonard, Ernest N. Koffi, and Philippe Peylin. "Assimilation of multiple datasets results in large differences in regional- to global-scale NEE and GPP budgets simulated by a terrestrial biosphere model." Biogeosciences 20, no. 6 (2023): 1089–111. http://dx.doi.org/10.5194/bg-20-1089-2023.

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Abstract. In spite of the importance of land ecosystems in offsetting carbon dioxide emissions released by anthropogenic activities into the atmosphere, the spatiotemporal dynamics of terrestrial carbon fluxes remain largely uncertain at regional to global scales. Over the past decade, data assimilation (DA) techniques have grown in importance for improving these fluxes simulated by terrestrial biosphere models (TBMs), by optimizing model parameter values while also pinpointing possible parameterization deficiencies. Although the joint assimilation of multiple data streams is expected to const

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Ryder, J., J. Polcher, P. Peylin, et al. "A multi-layer land surface energy budget model for implicit coupling with global atmospheric simulations." Geoscientific Model Development 9, no. 1 (2016): 223–45. http://dx.doi.org/10.5194/gmd-9-223-2016.

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Abstract. In Earth system modelling, a description of the energy budget of the vegetated surface layer is fundamental as it determines the meteorological conditions in the planetary boundary layer and as such contributes to the atmospheric conditions and its circulation. The energy budget in most Earth system models has been based on a big-leaf approach, with averaging schemes that represent in-canopy processes. Furthermore, to be stable, that is to say, over large time steps and without large iterations, a surface layer model should be capable of implicit coupling to the atmospheric model. Su

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Ryder, J., J. Polcher, P. Peylin, et al. "A multi-layer land surface energy budget model for implicit coupling with global atmospheric simulations." Geoscientific Model Development Discussions 7, no. 6 (2014): 8649–701. http://dx.doi.org/10.5194/gmdd-7-8649-2014.

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Abstract. In Earth system modelling, a description of the energy budget of the vegetated surface layer is fundamental as it determines the meteorological conditions in the planetary boundary layer and as such contributes to the atmospheric conditions and its circulation. The energy budget in most Earth system models has long been based on a "big-leaf approach", with averaging schemes that represent in-canopy processes. Such models have difficulties in reproducing consistently the energy balance in field observations. We here outline a newly developed numerical model for energy budget simulatio

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Peylin, Philippe, Cédric Bacour, Natasha MacBean, et al. "A new stepwise carbon cycle data assimilation system using multiple data streams to constrain the simulated land surface carbon cycle." Geoscientific Model Development 9, no. 9 (2016): 3321–46. http://dx.doi.org/10.5194/gmd-9-3321-2016.

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Abstract. Large uncertainties in land surface models (LSMs) simulations still arise from inaccurate forcing, poor description of land surface heterogeneity (soil and vegetation properties), incorrect model parameter values and incomplete representation of biogeochemical processes. The recent increase in the number and type of carbon cycle-related observations, including both in situ and remote sensing measurements, has opened a new road to optimize model parameters via robust statistical model–data integration techniques, in order to reduce the uncertainties of simulated carbon fluxes and stoc

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Jost, A., S. Fauquette, M. Kageyama, et al. "High resolution climate and vegetation simulations of the Late Pliocene, a model-data comparison over western Europe and the Mediterranean region." Climate of the Past 5, no. 4 (2009): 585–606. http://dx.doi.org/10.5194/cp-5-585-2009.

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Abstract. Here we perform a detailed comparison between climate model results and climate reconstructions in western Europe and the Mediterranean area for the mid-Piacenzian warm interval (ca 3 Myr ago) of the Late Pliocene epoch. This region is particularly well suited for such a comparison as several quantitative climate estimates from local pollen records are available. They show evidence for temperatures significantly warmer than today over the whole area, mean annual precipitation higher in northwestern Europe and equivalent to modern values in its southwestern part. To improve our compar

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Jost, A., S. Fauquette, M. Kageyama, et al. "High resolution climate and vegetation simulations of the Mid-Pliocene, a model-data comparison over western Europe and the Mediterranean region." Climate of the Past Discussions 5, no. 3 (2009): 1367–414. http://dx.doi.org/10.5194/cpd-5-1367-2009.

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Abstract. The Middle Pliocene (around 3 Ma) is a period characterized by a climate significantly warmer than today, at the global scale, as attested by abundant paleoclimate archives as well as several climate modelling studies. There we perform a detailed comparison between climate model results and climate reconstructions in western Europe and the Mediterranean area. This region is particularly well suited for such a comparison as several climate reconstructions from local pollen records covering the Mid-Pliocene provide quantitative terrestrial climate estimates. They show evidence for temp

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Xueref-Remy, I., P. Bousquet, C. Carouge, L. Rivier, N. Viovy, and P. Ciais. "Variability and budget of CO<sub>2</sub> in Europe: analysis of the CAATER airborne campaigns – Part 2: Comparison of CO<sub>2</sub> vertical variability and fluxes from observations and a modeling framework." Atmospheric Chemistry and Physics Discussions 10, no. 2 (2010): 4271–304. http://dx.doi.org/10.5194/acpd-10-4271-2010.

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Abstract. Our ability to predict future climate change relies on our understanding of current and future CO2 fluxes, particularly at the scale of regions (100–1000 km). Nowadays, CO2 regional sources and sinks are still poorly known. Inverse transport modeling, a method often used to quantify these fluxes, relies on atmospheric CO2 measurements. One of the main challenge for the transport models used in the inversions is to reproduce properly CO2 vertical gradients between the boundary layer and the free troposphere, as these gradients impact on the partitioning ot the calculated fluxes betwee

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Xueref-Remy, I., P. Bousquet, C. Carouge, L. Rivier, and P. Ciais. "Variability and budget of CO<sub>2</sub> in Europe: analysis of the CAATER airborne campaigns – Part 2: Comparison of CO<sub>2</sub> vertical variability and fluxes between observations and a modeling framework." Atmospheric Chemistry and Physics 11, no. 12 (2011): 5673–84. http://dx.doi.org/10.5194/acp-11-5673-2011.

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Abstract. Our ability to predict future climate change relies on our understanding of current and future CO2 fluxes, particularly on a regional scale (100–1000 km). CO2 regional sources and sinks are still poorly understood. Inverse transport modeling, a method often used to quantify these fluxes, relies on atmospheric CO2 measurements. One of the main challenges for the transport models used in the inversions is to properly reproduce CO2 vertical gradients between the boundary layer and the free troposphere, as these gradients impact on the partitioning of the calculated fluxes between the di

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Law, Vincent, Brittany Evernden, John Puskas, et al. "CMET-26. IN-VITRO & IN-VIVO CULTURE OF PATIENT (PT) DERIVED CSF-CTCS IN LEPTOMENINGEAL DISEASE (LMDZ) FROM MELANOMA TO IDENTIFY NOVEL TREATMENT STRATEGIES." Neuro-Oncology 21, Supplement_6 (2019): vi57. http://dx.doi.org/10.1093/neuonc/noz175.227.

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Abstract BACKGROUND Approx. 5% of melanoma pts develop LMDz. There are essentially no models of LMDz available for therapeutic development. Here we report, the in-vitro & in-vivo culturing of CSF-CTCs. METHODS CSF-CTCs were detected by the Veridex CellSearch® System. Cell-free DNA and cell-associated DNA were extracted, sequenced and profiled. Expanded ex-vivo CSF-CTCs were grown in-vitro and tested for drug sensitivity. CSF-CTCs were grown successfully in-vivo from 1 pt; labeled human Braf V600E WM164 cells were injected IT in as a control. RESULTS CSF-CTCs: 12 LMDz pts and 8 melanoma pts

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Dissertations / Theses on the topic "ORCHIDEE and LMDZ models"

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Gutierrez, Cori Omar. "Relationship and feedback between LULC changes and hydroclimatic variability in Amazonia." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS123.

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La forêt amazonienne joue un rôle essentiel en tant que régulateur du système climatique et principal puits de carbone terrestre. Il contrôle les processus hydroclimatiques et atténue les effets des sécheresses grâce au couplage végétation-atmosphère. En fait, les forêts amazoniennes peuvent potentiellement affecter les régimes de précipitations grâce à des processus biophysiques tels que le recyclage de l'eau. Cependant, ces capacités ont été réduites au cours des dernières décennies en raison des perturbations du système climat-végétation ainsi que de l'intensification des sécheresses. Cela

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Lathière, Juliette. "Evolution des émissions de composés organiques et azotés par la biosphère continentale dans le modèle LMDz-INCA-ORCHIDEE." Paris 6, 2005. http://www.theses.fr/2005PA066322.

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Krinner, Gerhard. "Simulations du climat des calottes de glace." Phd thesis, Université Joseph Fourier (Grenoble), 1997. http://tel.archives-ouvertes.fr/tel-00716408.

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Ce travail traite de la simulation numérique du climat des grandes calottes de glace, en particulier des calottes de l'Antarctique et du Groenland, toujours existantes, dans des conditions climatiques différentes, à l'aide de modèles de circulation générale de l'atmosphère (MCGA). Le MCGA à grille variable LMDz a été adapté aux spécificités du climat polaire et validé pour le climat actuel. L'approche d'une grille variable, qui permet d'utiliser le MCGA à haute résolution spatiale (autour de 100 km) sur la région d'intérêt à un coût numérique raisonnable, a été validée en analysant la dynamiqu

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