Sentences with phrase «by changes in atmospheric composition»

Not exact matches

And by carefully measuring and modeling the resulting changes in atmospheric composition, scientists could improve their estimate of how sensitive Earth's climate is to CO2, said lead author Joyce Penner, a professor of atmospheric science at the University of Michigan whose work focuses on improving global climate models and their ability to model the interplay between clouds and aerosol particles.

For example, changes in Earth's atmospheric composition (especially the concentrations of greenhouse gases) may alter the climate, while climate change itself can change the atmospheric composition (for example by changing the rate at which weathering removes CO2).

Changes in atmospheric composition from human activities are the main cause of anthropogenic climate change by enhancing the greenhouse effect, although with important regional effects from aerosol particulates (IPCC 2007).

Because 20 - year trends can be substantially influenced by just a few single or multi-year «warm» or «cold» events, they are not necessarily representative of the true response of the climate system to the more gradual changes in atmospheric composition that are taking place in response to human activities.

Were this postulate true, we would have noted a change in the atmospheric composition of CO2, due to warm (CO2 denuded) water being replaced by cool (CO2 rich) waters.

The ability to hindcast the detailed changes in atmospheric composition over the past decade, particularly the variability of tropospheric O3 and CO, is limited by the availability of measurements and their integration with models and emissions data.

Change of surface temperature between 1990 and 2090, as predicted by the Geophysical Fluid Dynamics Laboratory (GFDL) GCM forced by the anticipated change in atmospheric gas composChange of surface temperature between 1990 and 2090, as predicted by the Geophysical Fluid Dynamics Laboratory (GFDL) GCM forced by the anticipated change in atmospheric gas composchange in atmospheric gas composition.

I was continuing to root through the AGU FM abstracts and came across this from Christina Ravelo et al. (paragraphed for easier digestion by dyspeptic elderly bunnies): «The response of climate to past changes in atmospheric greenhouse gas composition can be used to assess Earth System sensitivity.

We especially want our global surface temperature reconstruction to be accurate for the Pliocene and Pleistocene because the global temperature changes that are expected by the end of this century, if humanity continues to rapidly change atmospheric composition, are of a magnitude comparable to climate change in those epochs [1,48].

These previous mass extinction events (also known as the «Big Five») are hypothesised to have been caused by combinations of key events such as unusual climate change, changes in atmospheric composition, and abnormally high stress on the ecosystem (except in the case of the Cretaceous, which was caused by an asteroid impact and subsequent effects).

Field studies carried out over the last 20 years clearly show local changes in water, energy, carbon and nutrient cycling, and in atmospheric composition, caused by deforestation, logging, forest fragmentation and biomass burning.