Sentences with phrase «carbon cycle model»

Allen et al in Nature 30 April 2009, SI, stated explicitly (SI, p. 6) «the terrestrial carbon cycle model has both vegetation and soil components stores.

Bala, G., K. Caldeira, A. Mirin, M. Wickett, and C. Delira, Multicentury changes to the global climate and carbon cycle: Results from a coupled climate and carbon cycle model, Journal of Climate, 18, 4531 - 4544, 2005.

Overall, the trend in Phanerozoic ca follows that of the GEOCARBSULFvolc long - term carbon cycle model (Figure 4d, black line), except for the late Mesozoic (~ 140 Myr ago) where the fossil model yields somewhat lower ca.

For an evaluation of Salby equations, see A comparison of Gösta Pettersson's carbon cycle model with observations, By Pehr Björnbom Page 10 addresses Salby's equations.

(oh, and the whole 13C thing has been known for a long time: «(2) consistent relationships between δ13C and CO2 (Rayner et al., 1999),» — or, google «13c global carbon cycle model»)

As shown by our simulations with a climate − carbon cycle model, such a relationship between dust and climate implies that dust - induced cooling is responsible for the final step from intermediate to extreme glacial cooling and drawdown of atmospheric CO2 concentrations.

One of the propositions is the attachment of a carbon cycle model and the response function of the biological sinks (Southern Ocean etc) At ESD the editors have a biological systems (deep ecology) bias whic his why they had to publish where um the understanding is more limited.

Sensitivity analysis shows that different assumptions of climate sensitivity, carbon cycle model or scenario do not substantially change the outcome.

We use the dynamic - sink pulse - response function version of the well - tested Bern carbon cycle model [169], as described elsewhere [54], [170].

Dear Andrew, the extremely long residence time of CO2 is based on the Bern carbon cycle model, which is extremely flawed.

Our study implies that the use of a global relationship between pCO2 and temperature independent of the geography in long time scale carbon cycle model [37] and [38] may induce significant errors.»

The researchers employed a coupled - climate carbon cycle model, initially integrated under a fixed pre-industrial atmospheric concentration of 278ppm for 5000 years.

1 When designing the Norwegian Earth System Model (NorESM), instead of starting from scratch, the modeling groups took the atmosphere model (called CAM) from the climate model called CESM, an ocean model originating from the MICOM model and the carbon cycle model HAMOCC from Germany.

Abstract: A coupled atmosphere - ocean - carbon cycle model is used to examine the long term climate implications of various 2050 greenhouse gas emission reduction targets.

We introduce a carbon cycle model that would explain the PETM by global warming following a bolide impact, leading to the oxidation of terrestrial organic carbon stores built up during the late Paleocene.

Comparison of the predictions of GEOCARB carbon cycle model (dashed line) with a smoothed representation of the proxy record (solid line).

You underscore a problem: accounting for «slow» feedbacks suppose that a climate model or a carbon cycle model run for centuries.

That said, the CGCM 21st century projections (IPCC scenario runs) typically used in policy discussions do not include a coupled carbon cycle model, though many people seem to think that they do.

These are the stunning results of climate and carbon cycle model simulations conducted by scientists at the Lawrence Livermore National Laboratory.

Small differences are likely due to the carbon cycle model used and the trends in additional forcings.

Using our carbon cycle model we calculate that if we extract 100 ppm of CO2 from the air over the period 2030 — 2100 (10/7 ppm per year), say storing that CO2 in carbonate bricks, the atmospheric CO2 amount in 2100 will be reduced 52 ppm to 358 ppm, i.e., the reduction of airborne CO2 is about half of the amount extracted from the air and stored.

We use the dynamic - sink pulse - response function version of the well - tested Bern carbon cycle model [169], as described elsewhere [54], [170].

Govindasamy, B., et al., 2005: Increase of the carbon cycle feedback with climate sensitivity: results from a coupled and carbon climate and carbon cycle model.

Mouchet, A., and L. François, 1996: Sensitivity of a global oceanic carbon cycle model to the circulation and to the fate of organic matter: Preliminary results.

A recent trend in GCMs is to extend them to become Earth system models, that include such things as submodels for atmospheric chemistry or a carbon cycle model to better predict changes in carbon dioxide concentrations resulting from changes in emissions.

[W. R. L. Anderegg et al, Pervasive drought legacies in forest ecosystems and their implications for carbon cycle models]

Professor Friedlingstein, who is an expert in global carbon cycle studies added: «Current land carbon cycle models do not show this increase over the last 50 years, perhaps because these models underestimate emerging drought effects on tropical ecosystems.»

«It's a hypothesis, but it has been ignored in carbon cycle models until now, and we suggest it must be represented because it's potentially very important.»

Dargaville, R.J., et al., 2002: Evaluation of terrestrial carbon cycle models with atmospheric CO2 measurements: Results from transient simulations considering increasing CO2, climate, and land - use effects.

Dr Chris Jones Lead researcher in vegetation and carbon cycle modelling Met Office Hadley Centre

Robert Berner of Yale University is a real Hero of the Earth who is not sufficiently known outside the field of Phanerozoic global carbon cycle modeling.

Jain, A.K., et al., Distribution of radiocarbon as a test of global carbon cycle models.

Since carbon cycle models allow us to understand past changes in atmospheric CO2 and 13C concentrations it is also possible to use these models to infer the 14C production rate based on measured 14C concentrations in tree rings.

Nor is the Amazon tipping point an «assumption» — it's in the literature, and has been since at least 2000, after carbon cycle models started to be implemented in GCMs.

I was trying to state that there are not yet, to my knowledge, 21st century scenario model runs of CGCMs coupled with complete terrestrial carbon cycle models.

Some AOGCM models have been coupled with carbon cycle models, but I've not yet regained the exact references concerning this coupling and the results for the range of equilibrium CS.

Land use emissions are estimated using deforestation and other land - use data, fire observations from space and carbon cycle modeling.

These carbon cycle models are not perfect and tend, on average, to have lower emissions associated with current CO2 concentrations than our best estimate of emissions that have actually occurred.

Despite the predictions of coupled climate - carbon cycle models, no trend in the airborne fraction can be found.

We'd driving the models with the GHG concentrations, and using carbon cycle models within the climate models to simulate the natural carbon fluxes (atmosphere - land and atmosphere - ocean), which themselves are affected by the simulated climate change, and the residual needed to balance the carbon budget then indicates the anthropogenic emissions that would give the prescribed scenario of CO2 rise.

But I am just reading a similar discussion between een electric engineer, Peter Dietze and several others involved in carbon cycle modelling.

This is why all of the carbon cycle models proposed by government - funded climate scientists assume adjustment times of hundreds (at least) of years.

Coral data aside, this is consistent with carbon cycle models in that the upper ocean exchange rate is high.

However, today's carbon cycle models, especially the land models, vary greatly in the processes and level of detail they include, and so averaging may not be appropriate.

The more complex explanation is even more sobering — carbon cycle models indicate that ~ 25 percent of CO2 from fossil fuel combustion will remain in the atmosphere for thousands of years, and ~ 7 percent longer than one hundred thousand years.

The new data produced values that are 50 % to 75 % higher than state - of - the - art carbon cycle models, indicating that the models are severely underestimating.

I certainly do hope that trees are mysteriously able to access more nitrogen and phosphorus to support the hypothesized carbon fertilization effect that the carbon cycle models project.

He doesn't understand how carbon cycle models work, he dismisses ice cores.

Given that the PETM carbon injection occurred over a period of a few millennia, carbon cycle models suggest that about one - third of the carbon would be airborne as CO2 following complete injection [21].

Long - term climate commitments projected with climate - carbon cycle models.