Sentences with phrase «vegetation models»
"Vegetation models" refers to computer programs or mathematical tools that help scientists understand and simulate the growth and behavior of plants and plant communities. Full definition
Global response of terrestrial ecosystem structure and function to CO2 and climate change: results from six dynamic global vegetation models.
nature.com
As the temporal scale is extended, the development of dynamic vegetation models, which respond to climate and human land use as well as other changes, is a central issue.
All 110 simulations predict an increase in global vegetation carbon to 2100, but with substantial variation between vegetation models.
However, global - scale vegetation model development has strongly focused on productivity processes whereas, apart from major disturbances such as fire, the dynamics of carbon turnover have been largely ignored.
In contrast to previous global vegetation model studies, we emphasize the importance of uncertainties in projected changes in carbon residence times.
We recognize that much of the land surface will continue to be transformed by land use, but do not consider this forcing to focus on identifying the main discrepancies between vegetation models.
Complex as they may be, the activities and effects of consumers should be incorporated into global vegetation models in order to accurately predict the likely consequences of global change.
Krinner, G., et al., 2005: A dynamic global vegetation model for studies of the coupled atmosphere - biosphere system.
Intercomparison of vegetation models usually involves comparing surface fluxes and their feedbacks.
Multiple mechanisms of Amazonian forest biomass losses in three dynamic global vegetation models under climate change
Future global vegetation carbon change calculated by seven global vegetation models using climate outputs and associated increasing CO2 from five GCMs run with four RCPs, expressed as the change from the 1971 — 1999 mean relative to change in global mean land temperature.
Adding chlorofyll fluorescence to vegetation models provides means to understand photosynthesis better at a global scale and improve its modelling.
In this work we implemented a chlorophyll fluorescence model developed at leaf scale to a global vegetation model JSBACH and we evaluated the model performance in terms of photosynthesis and chlorophyll fluorescence.
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).
ARC Discovery funding enabled ecological researchers at Macquarie and Western Sydney Universities to put together the plant observations from around the world to develop the new vegetation model.
The study by researchers of the Senckenberg Biodiversity and Climate Research Centre and Goethe University is based on computer vegetation models and was published in «Journal of Biogeography».
[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.
Comparing different general circulation climate models these researchers find it is actually only the (often - used) Hadley Centre model that forces vegetation models to a biome switch:
Peter Cox is the originator / author of the Triffid dynamic global vegetation model which was used to predict dieback of the Amazonian rain forest by 2050 and as a consequence a strong positive climate - carbon cycle feedback (i.e., an acceleration of global warming) with a resultant increase in global mean surface temperature by 8 deg.
Four vegetation models display discontinuities across 4 °C of warming, indicating global thresholds in the balance of positive and negative influences on productivity and biomass.
Focusing on the results from one of the GCM × RCP scenarios allows vegetation model behavior to be analyzed in more detail.
The HYBRID4 vegetation model includes a nitrogen cycle, and so this might be expected to be the reason for the decline in NPP, and hence, above 4 °C of warming because of the potential for nitrogen to limit CO2 fertilization (e.g., ref.
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.
The FMEC project will use weather@home volunteer computing to quantify uncertainties in the models used by running a regional climate and vegetation model called HadRM3 - TRIFFID.
The Finnish Meteorological Institute implemented the chlorophyll fluorescence model into a global vegetation model in collaboration with researchers from the Max Planck Institute.
A dynamic global vegetation model for studies of the coupled atmosphere - biosphere system.
One study shows that dust production is expected to decrease (Mahowald and Luo, 2003), though given the diversity of Sahel rainfall projections and the preliminary state of vegetation models, this is not necessarily going to be a universal response.
Adding chlorofyll fluorescence to vegetation models provides means to understand photosynthesis better at a global scale and improve its modelling.
In this work we implemented a chlorophyll fluorescence model developed at leaf scale to a global vegetation model JSBACH and we evaluated the model performance in terms of photosynthesis and chlorophyll fluorescence.
The Finnish Meteorological Institute implemented the chlorophyll fluorescence model into a global vegetation model in collaboration with researchers from the Max Planck Institute.
«To me the paper shows that multiscale patterns in Namibia can be explained by a coupled termite - vegetation model,» says M. G. «Max» Rietkerk, an ecologist at Utrecht University in the Netherlands.
«The paper shows that current climate - vegetation models are not able to reproduce the observed legacy effects and are therefore underestimating the effects of drought on vegetation and carbon cycling.»
This technique lays the foundation for much improved parameterizations of climate change and global vegetation models, which will tell what the future holds in store.
In previous publications, the research group of Juergen Schleucher showed that vegetation models should consider the entire metabolism of the plants.
Is there any chance of getting a guest contribution summarizing the state of Dynamic Global Vegetation Models and how they might be incorporated in future GCMs?
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.
The researchers used a climate - vegetation model that showed (like several similar studies) a clear increase in Amazonian drought following a global average temperature rise — leading to a large - scale die - back of rainforest, switching to grassland and savanna climate suitability.