Oceanic oxygen-18 at the present day and LGM: equilibrium simulations with a coupled climate model of intermediate complexity

Roche, Didier M.; Paillard, Didier; Ganopolski, A.; Hoffmann, Georg F.

doi:10.1016/s0012-821x(03)00700-3

Cited by 35 publications

(28 citation statements)

References 29 publications

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“…As a second fully coupled GCM, the HadCM3 model has been enhanced by a stable water isotope diagnostics module by Tindall et al (2009) for analyses of the present-day isotopic signature of El Niño-Southern Oscillation and the tropical amount effect. Besides these two fully coupled isotope-enabled GCMs, there have also been some efforts in including water stable isotopes in the hydrological cycle of Earth system models of intermediate complexity (EMICs) by Roche et al (2004), Brennan et al (2012), as well as Roche and Caley (2013). These isotopeenabled EMICs can be classified as an alternative tool to test ideas, explore large periods of time in a transient mode, and guide much more computationally demanding simulations with fully coupled GCMs.…”

Section: Werner Et Al: Glacial-interglacial Changes In Hmentioning

confidence: 99%

Glacial–interglacial changes in H218O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

et al. 2016

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Abstract. In this study we present the first results of a new isotope-enabled general circulation model set-up. The model consists of the fully coupled ECHAM5/MPI-OM atmosphere-ocean model, enhanced by the JSBACH interactive land surface scheme and an explicit hydrological discharge scheme to close the global water budget. Stable water isotopes H 2 18 O and HDO have been incorporated into all relevant model components. Results of two equilibrium simulations under pre-industrial and Last Glacial Maximum conditions are analysed and compared to observational data and paleoclimate records for evaluating the model's performance in simulating spatial and temporal variations in the isotopic composition of the Earth's water cycle. For the pre-industrial climate, many aspects of the simulation results of meteoric waters are in good to very good agreement with both observations and earlier atmosphere-only simulations. The model is capable of adequately simulating the large spread in the isotopic composition of precipitation between low and high latitudes. A comparison to available ocean data also shows a good model-data agreement; however, a strong bias of overly depleted ocean surface waters is detected for the Arctic region. Simulation results under Last Glacial Maximum boundary conditions also fit to the wealth of available isotope records from polar ice cores, speleothems, as well as marine calcite data. Data-model evaluation of the isotopic composition in precipitation reveals a good match of the model results and indicates that the temporal glacial-interglacial isotopetemperature relation was substantially lower than the present spatial gradient for most mid-to high-latitudinal regions. As compared to older atmosphere-only simulations, a remarkable improvement is achieved for the modelling of the deuterium excess signal in Antarctic ice cores. Our simulation results indicate that cool sub-tropical and mid-latitudinal sea surface temperatures are key for this progress. A recently discussed revised interpretation of the deuterium excess record of Antarctic ice cores in terms of marine relative humidity changes on glacial-interglacial timescales is not supported by our model results.

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Section: Werner Et Al: Glacial-interglacial Changes In Hmentioning

confidence: 99%

Glacial–interglacial changes in H218O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

et al. 2016

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“…This was proven possible in the CLIMBER-2 model that includes a 2.5 dimensional statistical-dynamical atmosphere with full computation for moisture advection (Roche et al, 2004), albeit under the constraint of a simplistic water closure assumption. In the present study, we evaluate the results obtained with the newly developed 18 O module for the iLOVECLIM coupled climate model, a derivative of the LOVECLIM model (Goosse et al, 2010).…”

Section: M Roche and T Caley: Water Isotopes In The Iloveclimmodelmentioning

confidence: 99%

δ18O water isotope in the iLOVECLIM model (version 1.0) – Part 2: Evaluation of model results against observed δ18O in water samples

Roche

Caley

2013

Geosci. Model Dev.

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Abstract. The H 2 18 O stable isotope was previously introduced in the three coupled components of the earth system model iLOVECLIM: atmosphere, ocean and vegetation. The results of a long (5000 yr) pre-industrial equilibrium simulation are presented and evaluated against measurement of H 2 18 O abundance in present-day water for the atmospheric and oceanic components. For the atmosphere, it is found that the model reproduces the observed spatial distribution and relationships to climate variables with some merit, though limitations following our approach are highlighted. Indeed, we obtain the main gradients with a robust representation of the Rayleigh distillation but caveats appear in Antarctica and around the Mediterranean region due to model limitation. For the oceanic component, the agreement between the modelled and observed distribution of water δ 18 O is found to be very good. Mean ocean surface latitudinal gradients are faithfully reproduced as well as the mark of the main intermediate and deep water masses. This opens large prospects for the applications in palaeoclimatic context.

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“…Model (GFDL MOM) [Paul et al, 1999], the CLIMBER-2 intermediate complexity Earth system model [Roche et al, 2004], the Goddard Institute for Space Studies (GISS) coupled ocean-atmosphere GCM [Schmidt et al, 2007], the Hadley Centre Climate model (HadCM3) coupled atmosphere-ocean GCM [Tindall et al, 2009], the NCAR Community…”

Section: Oxygen Isotopic Ratios Oxygen Isotopes Have Been Incorporatmentioning

confidence: 99%

Atlantic Ocean circulation at the Last Glacial Maximum : inferences from data and models

Dail¹

2012

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Oceanic oxygen-18 at the present day and LGM: equilibrium simulations with a coupled climate model of intermediate complexity

Cited by 35 publications

References 29 publications

Glacial–interglacial changes in H<sub>2</sub><sup>18</sup>O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

Glacial–interglacial changes in H<sub>2</sub><sup>18</sup>O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

δ<sup>18</sup>O water isotope in the <i>i</i>LOVECLIM model (version 1.0) – Part 2: Evaluation of model results against observed δ<sup>18</sup>O in water samples

Atlantic Ocean circulation at the Last Glacial Maximum : inferences from data and models

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Oceanic oxygen-18 at the present day and LGM: equilibrium simulations with a coupled climate model of intermediate complexity

Cited by 35 publications

References 29 publications

Glacial–interglacial changes in H&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;18&lt;/sup&gt;O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

Glacial–interglacial changes in H&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;18&lt;/sup&gt;O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

δ&lt;sup&gt;18&lt;/sup&gt;O water isotope in the &lt;i&gt;i&lt;/i&gt;LOVECLIM model (version 1.0) – Part 2: Evaluation of model results against observed δ&lt;sup&gt;18&lt;/sup&gt;O in water samples

Atlantic Ocean circulation at the Last Glacial Maximum : inferences from data and models

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Glacial–interglacial changes in H<sub>2</sub><sup>18</sup>O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

Glacial–interglacial changes in H<sub>2</sub><sup>18</sup>O, HDO and deuterium excess – results from the fully coupled ECHAM5/MPI-OM Earth system model

δ<sup>18</sup>O water isotope in the <i>i</i>LOVECLIM model (version 1.0) – Part 2: Evaluation of model results against observed δ<sup>18</sup>O in water samples