Sentences with phrase «vegetation models do»

[Response: Some dynamic vegetation models do take the diffuse / direct light ratios into account, but these aren't in widespread use for long millennial runs.

Not exact matches

«Most climate models that incorporate vegetation are built on short - term observations, for example of photosynthesis, but they are used to predict long - term events,» said Bond - Lamberty, who works at the Joint Global Change Research Institute, a collaboration between PNNL and the University of Maryland in College Park, Md. «We need to understand forests in the long term, but forests change slowly and researchers don't live that long.»

General circulation models have generally excluded the feedback between climate and the biosphere, using static vegetation distributions and CO2 concentrations from simple carbon - cycle models that do not include climate change6.

Paleoclimate Modelling Intercomparison Project 2 (PMIP - 2) simulations shown in bottom left and right panels do not include the radiative influences of LGM changes in mineral dust or vegetation.

This setup consists of an atmospheric model with a simple mixed - layer ocean model, but that doesn't include chemistry, aerosol vegetation or dynamic ice sheet modules.

General circulation models have generally excluded the feedback between climate and the biosphere, using static vegetation distributions and CO2 concentrations from simple carbon - cycle models that do not include climate change6.

Finally I attempt a suggestion that perhaps one solution to the problem that the solar impact on climate is underestimated by models might be because EBM and GCM, like GISS, do not contain CO2 and CH4 cycle mechanisms that might be partially effected by the Sun, and other mechanisms are missing or uncertain (water vapor, cloud cover, vegetation, bacteria respiration, UV radiation, cosmic ray effects etc.).

«The novelty of our model is it does account for some interdisciplinary transfers of water, such as feedbacks between groundwater storage and, for example, vegetation at the land surface.

5 looked in more detail at the responses of three of these DGVMs in the Amazon region, and found that although all three models simulated reductions in vegetation carbon, they did this for different reasons.

«Most Earth system models don't predict this, which means they overestimate the amount of carbon that high - latitude vegetation will store in the future,» he adds.

Different vegetation models driven with similar climate projections also show Amazon dieback (82), but other global climate models (83) project smaller reductions (or increases) of precipitation and, therefore, do not produce dieback (84).

Using complex computer models, the team concluded that on average, vegetation absorbs 11 billion fewer metric tons of carbon dioxide than it would in a climate that doesn't experience extreme weather events.

In the version of this Letter originally published, in the final paragraph, the section of text including «Earth system models should... nutrient cycling)» was misleading and should have been: «Models simulating the dynamics of the terrestrial biosphere currently consider the effects of nitrogen on vegetation and soils25, 26 but they still do not consider the effects of other nutrients such as phosphorus or potamodels should... nutrient cycling)» was misleading and should have been: «Models simulating the dynamics of the terrestrial biosphere currently consider the effects of nitrogen on vegetation and soils25, 26 but they still do not consider the effects of other nutrients such as phosphorus or potaModels simulating the dynamics of the terrestrial biosphere currently consider the effects of nitrogen on vegetation and soils25, 26 but they still do not consider the effects of other nutrients such as phosphorus or potassium.

In order to do this they downscale output from a global climate model using a regional climate model that can simulate vegetation dynamics.

Does the model these temperatures are based on have a good handle on vegetation cover?

When done so, proxy records and climate models indicate that the response to past global warming was profound, with evidence for global reorganisation of the hydrological cycle and profound local increases and decreases in rainfall; combined with elevated temperatures and terrestrial vegetation change, this appears to often result in warming - enhanced soil organic matter oxidation, chemical weathering and nutrient cycling.

But once you took all of this into account, you might as well throw in the carbon cycle, vegetation (albedo), soil (albedo), cloud formation (albedo, etc.), evaporation from soil, the spectra for the sun and its luminosity, solar cycles, and once you do that you pretty much have the entire climate model, including how it evolves over time — or there abouts.

Climate models today are extremely flexible and configurable tools that can include all these Earth System modules (including those mentioned above, but also full carbon cycles and dynamic vegetation), but depending on the application, often don't need to.