Sentences with phrase «of changes in atmospheric composition»

Changes in climate zone distribution will always be a result of any changes in atmospheric composition that affect the net radiation balance of the entire atmosphere.

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.

Non-polar glacial ice holds a wealth of information about past changes in climate, the environment and especially atmospheric composition, such as variations in temperature, atmospheric concentrations of greenhouse gases and emissions of natural aerosols or human - made pollutants... The glaciers therefore hold the memory of former climates and help to predict future environmental changes.

Smit, a professor in UBC's department of earth, ocean & atmospheric sciences, and colleague, professor Klaus Mezger of the University of Bern, were aware that the composition of continents also changed during this period.

The main factors include solar variability, volcanic activity, atmospheric composition, the amount of sunlight reflected back into space, ocean currents and changes in the Earth's orbit.

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).

The consensus is that several factors are important: atmospheric composition (the concentrations of carbon dioxide, methane); changes in the Earth's orbit around the Sun known as Milankovitch cycles (and possibly the Sun's orbit around the galaxy); the motion of tectonic plates resulting in changes in the relative location and amount of continental and oceanic crust on the Earth's surface, which could affect wind and ocean currents; variations in solar output; the orbital dynamics of the Earth - Moon system; and the impact of relatively large meteorites, and volcanism including eruptions of supervolcanoes.

For my post-doctoral project, I decided to focus on the question, «to what extent can atmospheric pollutants, such as CO2 and ozone, exert a selective effect on woody plant species, and how are the resulting changes in the genetic composition of the plant community likely to affect the animals that feed on them?»

This inertia implies that there is additional climate change «in the pipeline» even without further change of atmospheric composition.

Global changes of the atmospheric composition and natural circulation changes are in competition to each other in determining the Arctic surface climate.

Meteorological scientists warn that the changes in heat composition and air pressure over the Tibetan Plateau may have implications beyond Asia's river basins, as shifting dynamics of the atmospheric circulatory system over the plateau could change wind and monsoon patterns across much of the world.

[Response: Changes in the atmospheric composition are negligible for their effect on the gas law, but not in terms of radiative transfer, so your conclusion is invalid.]

Given the huge sums of money involved in funding climate research and the even larger sums being spent on the assumption that it gives us good guidance for practical decisions, it may be time for some very large experimental chambers to be constructed to test the presumptions of the device of using forcings as an tractable way of including changes in atmospheric composition in climate models.

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).

Implications include (i) the expectation of additional global warming of about 0.6 °C without further change of atmospheric composition; (ii) the confirmation of the climate system's lag in responding to forcings, implying the need for anticipatory actions to avoid any specified level of climate change; and (iii) the likelihood of acceleration of ice sheet disintegration and sea level rise.

panel cautions that trends in such short periods of record with arbitrary start and end points are not necessarily representative of how the atmosphere is changing in response to long - term human - induced changes in atmospheric composition.

«No doubt CO2 has been climbing, but the total change in atmospheric composition [since 1945, when CO2 levels began to increase] is one 9/1, 000 ths of one percent.

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 main factors include solar variability, volcanic activity, atmospheric composition, the amount of sunlight reflected back into space, ocean currents and changes in the Earth's orbit.

Carbon dioxide is a greenhouse gas and we can demonstrate clearly that the observed warming of the planet would not have occurred without that change in atmospheric composition.

It is an estimation that does not provide sufficient accuracy when compared to at tiny change in atmospheric composition due to a doubling of CO2.

All of these influences occur superposed on the climate change signals associated with changes in atmospheric composition.»

These include increased average land and ocean temperatures that lead to reduced snowpack levels, hydrological changes, and sea level rise; changing precipitation patterns that will create both drought and extreme rain events; and increasing atmospheric CO2 that will contribute to ocean acidification, changes in species composition, and increased risk of fires.

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.

Changes in atmospheric composition and chemistry over the past century have affected, and those projected into the future will affect, the lifetimes of many greenhouse gases and thus alter the climate forcing of anthropogenic emissions:

Climate change commitment - Due to the thermal inertia of the ocean and slow processes in the biosphere, the cryosphere and land surfaces, the climate would continue to change even if the atmospheric composition were held fixed at today's values.

However, overall sensitivities of lifetime to changes in atmospheric composition vary widely from model to model.

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.

One implication is that if humans burn most of the fossil fuels, thus injecting into the atmosphere an amount of CO2 at least comparable to that injected during the PETM, the CO2 would stay in the surface carbon reservoirs (atmosphere, ocean, soil, biosphere) for tens of thousands of years, long enough for the atmosphere, ocean and ice sheets to fully respond to the changed atmospheric composition.

Consider the facts: the climate system is indicated to have left the natural cycle path; multiple lines of evidence and studies from different fields all point to the human fingerprint on current climate change; the convergence of these evidence lines include ice mass loss, pattern changes, ocean acidification, plant and species migration, isotopic signature of CO2, changes in atmospheric composition, and many others.

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].

This apparent widespread loss in the sensitivity to temperature is, however, not fully understood and several different explanations have been proposed, e.g. relating the phenomenon to changes in the atmospheric composition (Briffa et al. 1998b, 2004); to drought stress (Barber et al. 2000); physiological threshold effects (D'Arrigo et al. 2004; Wilmking et al. 2004); and to changes in the length of the growing season (Vaganov et al. 1999).

Ku, S. Gaffin, and P.L. Kinney, 2007: Air quality in future decades: Determining the relative impacts of changes in climate, emissions, global atmospheric composition, and regional land use.

And we have a lot of different examples in the Earth's history of how climate has changed as the atmospheric composition has changed.

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).

Steve Schneider helped the world understand that the burning of fossil fuels had altered the chemistry of Earth's atmosphere, and that this change in atmospheric composition had led to a discernible human influence on our planet's climate.

Specifically, has anyone here framed the issue in terms of, «changing the composition of a substance changes its properties» — and then related that to activities ranging from cooking, to metallurgy, to biotechnology, to the atmospheric effect of taking lead out of gasoline?

The changes in atmospheric composition and surface properties, indicated here, which maintained a global temperature difference of 5 ± 1 °C between the ice age and the interglacial period, are known accurately.

They constrained the TOA budget to match estimates of the global imbalance associated with changes in atmospheric composition and climate.

the reason the period of the last 1000 years isn't much of a priority in terms of paleo simulations is that you need some specified change to external forcing (solar, atmospheric composition) or bottom boundary conditions (like continents moving around) to get a simulation that is different from present.