Sentences with phrase «modeled vegetation responses»

Not exact matches

For the study, Gentine and Lemordant took Earth system models with decoupled surface (vegetation physiology) and atmospheric (radiative) CO2 responses and used a multi-model statistical analysis from CMIP5, the most current set of coordinated climate model experiments set up as an international cooperation project for the International Panel on Climate Change.

Right now, she says, the way climate models incorporate vegetation's response to drought is too simplistic.

[Response: There is a Hadley Centre / HadCM3 study on this, using a version of the GCM with vegetation model included — William]

Although dynamic vegetation models tend to predict an overall expansion of cool forests and woodlands (Shafer et al. 2015), some tree species may actually experience reduced ranges due to geographical obstacles to range expansion in response to climate (Coops and Waring 2001).

For instance, the sensitivity only including the fast feedbacks (e.g. ignoring land ice and vegetation), or the sensitivity of a particular class of climate model (e.g. the «Charney sensitivity»), or the sensitivity of the whole system except the carbon cycle (the Earth System Sensitivity), or the transient sensitivity tied to a specific date or period of time (i.e. the Transient Climate Response (TCR) to 1 % increasing CO2 after 70 years).

Model studies for climate change between the Holocene and the Pliocene, when Earth was about 3 °C warmer, find that slow feedbacks due to changes of ice sheets and vegetation cover amplified the fast feedback climate response by 30 — 50 % [216].

[Response: The models that include a carbon cycle and dynamic vegetation should have such effects — but this is still a rather experimental class of models.

[Response: There is a Hadley Centre / HadCM3 study on this, using a version of the GCM with vegetation model included — William]

And I suspect that vegetation models would mostly be tuned to simulate interior forest behaviour and so might not be that informative about vegetation response to changing diffuse / direct light near the tree line with open and sparse forest cover.

[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.

A better understanding of the ways that vegetation regulates CH4 production and mediates CH4 transport will help to inform models and explain why emission response differs for different landscapes.

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.

It is clear from these results that the response of residence time to climate and CO2 is a critical yet inconsistently represented feature of current global vegetation models.

We find, when all seven models are considered for one representative concentration pathway × general circulation model combination, such uncertainties explain 30 % more variation in modeled vegetation carbon change than responses of net primary productivity alone, increasing to 151 % for non-HYBRID4 models.

4 looked at the responses of five DGVMs, coupled to a fast climate analog model, finding dramatic divergence in future behavior, particularly of tropical vegetation responses to drought and boreal ecosystem responses to elevated temperature and changing soil moisture.

Seven global vegetation models are used to analyze possible responses to future climate simulated by a range of general circulation models run under all four representative concentration pathway scenarios of changing concentrations of greenhouse gases.

Using simulation results from five GCMs and the full range of RCPs, we have characterized the range of terrestrial vegetation responses to future conditions across seven different global vegetation model formulations.

Here seven GVMs are used to investigate possible responses of global natural terrestrial vegetation to a major new set of future climate and atmospheric CO2 projections generated as part of the fifth phase of the Coupled Model Intercomparison Project (CMIP5)(6), the primary climate modeling contribution to the latest Intergovernmental Panel on Climate Change assessment.

To conduct their study, the researchers used a spatial model of marsh morphodynamics into which they incorporated recently published observations from field experiments on marsh vegetation response to varying levels of atmospheric carbon dioxide.

The response of atmospheric CO2 and climate to the reconstructed variability in solar irradiance and radiative forcing by volcanoes over the last millennium is examined by applying a coupled physical — biogeochemical climate model that includes the Lund - Potsdam - Jena dynamic global vegetation model (LPJ - DGVM) and a simplified analogue of a coupled atmosphere — ocean general circulation model.

Model studies for climate change between the Holocene and the Pliocene, when Earth was about 3 °C warmer, find that slow feedbacks due to changes of ice sheets and vegetation cover amplified the fast feedback climate response by 30 — 50 % [216].

Global response of terrestrial ecosystem structure and function to CO2 and climate change: results from six dynamic global vegetation models.

Vegetation / ecosystem modelling and analysis project: comparing biogeography and biogeochemistry models in a continental - scale study of terrestrial responses to climate change and CO2 doubling.

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.

They are intended to be scenario simulations, illustrating the response of the climate system to a range of different emission scenarios, with all other factors (like volcanoes, solar, landcover) remaining the same (although some models are starting to put in interactive vegetation).