Sentences with phrase «atmospheric lifetime»

With a long atmospheric lifetime of about 6 months, mercury emissions spread across the globe.

Certainly, CO2 and other anthropogenic GHG emissions are a potent driver of warming, with water serving in a feedback role due to its short atmospheric lifetime.

Due to a very brief atmospheric lifetime, black carbon's climate effects are strongly regional.

The global instantaneous atmospheric lifetime of a trace gas in the atmosphere is obtained by integrating the loss frequency l over the atmospheric domain considered.

Effectively, methane increases its own atmospheric lifetime and therefore its overall radiative effect.

«Even with mitigation efforts, climate change will continue to unfold for decades due to the long atmospheric lifetime of past greenhouse - gas emissions and the gradual release of excess heat that has built up in the oceans,» reads the report.

Abstract - Although carbon dioxide emissions are by far the most important mediator of anthropogenic climate disruption, a number of shorter - lived substances with atmospheric lifetimes of under a...

The CH4 feedback effect amplifies the climate forcing of an addition of CH4 to the current atmosphere by lengthening the perturbation lifetime relative to the global atmospheric lifetime of CH4 by a factor of 1.4.

This model took into account the different atmospheric lifetimes of different greenhouse gases and the different radiative forcings of each gas, and also considered delays in the climate system caused primarily by the thermal inertia of the ocean.

The 1989 Montreal Protocol led to the phaseout of those chemicals, but their long atmospheric lifetime means that seasonal ozone losses will persist well into this century.

Unlike CFCs and similar long - lived gases that are responsible for most ozone depletion, dichloromethane has a short atmospheric lifetime so has not been controlled by the Montreal Protocol.

Currently only ozone - depleting substances with atmospheric lifetimes ranging from a year to over 100 years, are controlled because they linger in the atmosphere long enough to reach the upper atmosphere, called the stratosphere.

The global atmospheric lifetime characterises the time to achieve an e-fold decrease of the global atmospheric burden.

For example, if the CH4 abundance increases above its present - day value due to a one - time emission, the time it takes for CH4 to decay back to its background value is longer than its global unperturbed atmospheric lifetime.

Carbon dioxide has a variable atmospheric lifetime, and can not be specified precisely.

Almost all of their properties, and thus effects, are size dependent: The particle size governs the rate at which they fall out (and thus atmospheric lifetime), their interaction with radiation, their impact on clouds, or even their health effects.

«Even with mitigation efforts,» the Summit report says, «climate change will continue to unfold for decades due to the long atmospheric lifetime of past greenhouse - gas emissions and the gradual release of excess heat that has built up in the oceans.

Ray (7): I strongly agree, but I find this is a non-trivial challenge in climate communication, namely getting newcomers to understand that the current situation is quite urgent (current and locked - in emissions, long CO2 atmospheric lifetime, feedbacks, etc.) but that there's still a huge range of possible future outcomes.

«This can introduce a range of industrial chemicals with atmospheric lifetimes of just a few months to the stratosphere, which could have a potentially negative impact on the ozone layer.»

Anthropogenic emissions include many types of GHG's as well as particulates such as black carbon and sulfate aerosols, each of which has a different effect on the atmosphere, and a different atmospheric lifetime.

Deep cuts in carbon dioxide emissions are urgently needed to prevent dangerous climate change, but they must be complemented by reductions in short - lived climate pollutants, which produce a strong global warming effect but have relatively brief atmospheric lifetimes.

Sulfate aerosols have a very short atmospheric lifetime — as soon as it rains, they wash right out.

Turnover time (T)(also called global atmospheric lifetime) is the ratio of the mass M of a reservoir (e.g., a gaseous compound in the atmosphere) and the total rate of removal S from the reservoir: T = M / S. For each removal process, separate turnover times can be defined.

E.g., N2O has a mean atmospheric lifetime of 121 years.

Damon Matthews of Concordia University in Montreal, Canada, and his colleagues calculated national contributions to warming by weighting each type of emission according to the atmospheric lifetime of the temperature change it causes.

Although the hole has begun to heal, the ozone - destroying chemicals have long atmospheric lifetimes.

All this means that scientists now reviewing the Montreal Protocol should consider expanding the agreement to also regulate substances like CH2Cl2 that have atmospheric lifetimes of less than 6 months, Schofield says.

Dr Hossaini explained: «Due to their short atmospheric lifetimes, VSLS break down and destroy ozone in the lowermost part of the stratosphere.

«It is ironic that high concentrations of molecules with high global warming potential (GWP), the worst - case scenario for Earth's climate, is the optimal scenario for detecting an alien civilization, as GWP increases with stronger infrared absorption and longer atmospheric lifetime,» say the authors.

Conversely, if a molecule has a longer atmospheric lifetime than CO2 its GWP will increase with time.

The global warming potential (GWP) depends on both the efficiency of the molecule as a greenhouse gas and its atmospheric lifetime.

Given the atmospheric lifetime of carbon dioxide is many hundreds to thousands of years, we can now understand that long - lived greenhouses will also continue to exert a warming influence on the worlds oceans for a very long time.

Global warming potentials are calculated by integrating the radiative energy impact of a molecule of gas over its atmospheric lifetime.

But this is silly, since the atmospheric lifetime of aerosols is just a matter of days, so once we stop burning coal, as we eventually must, the aerosols disappear quickly, unmasking the pent - up warming due to all the extra CO2 we emitted by not switching from coal to natural gas.