Sentences with phrase «changes in cloud amount»

Changes in cloud amount and cloud types might increase warming (positive feedback) or reduce it (negative feedback).

Not exact matches

Experiments Prather and her team conducted in California's Sierra Nevada produced the first conclusive evidence that dust aerosols can change the amount of precipitation produced by clouds.

Aerosols that high in the sky «can change the amount of solar radiation reaching the Earth's surface and affect rainfall through cloud formation,» she says.

As a result, changes in Antarctic clouds, such as the amount of ground they cover or how much radiation they absorb, can have ripple effects as far away as the tropics.

A multidisciplinary team led by Pacific Northwest National Laboratory's Dr. Chuck Long found that, at least in the continental United States, changes in clouds and cloudiness have a greater influence on brightening than any decrease in aerosol amounts alone.

We call this the Charney climate sensitivity, because it is essentially the case considered by Charney (1979), in which water vapor, clouds and sea ice were allowed to change in response to climate change, but GHG (greenhouse gas) amounts, ice sheet area, sea level and vegetation distributions were taken as specified boundary conditions.

It should be pointed out here, that the amount of change in downward heat radiation from changes in cloud cover in the experiment, are far greater than the gradual change in warming provided by human greenhouse gas emissions, but the relationship was nevertheless established.

Her primary education was at best irregular — received in the form of brief instructions and lectures from untrained or retired teachers — but she spent a considerable amount of time on the cliffs and beaches of Padstow, watching light change and diffuse, cloud formations shift.

Step 3 (impact of CCN changes on cloud properties): I presume that you are talking about whether the change in amount of CCN will be great enough to alter cloud properties?

ENSO changes the cloud cover and water vapour amounts and so you would expect it to affect the Top - of - the - atmosphere radiation balance which changes the overall amount of heat in the system.

In our own modelling, we have improved the calculations to reduce the amount of numerical diffusion (which helped a lot), and increased resolution (which also helped), but changes to the ocean model also have a big impact, as do Arctic cloud processes and surface albedo parameterisations, so it gets complicated fast.

There will be Regionally / locally and temporal variations; increased temperature and backradiation tend to reduce the diurnal temperature cycle on land, though regional variations in cloud feedbacks and water vapor could cause some regions to have the opposite effect; changes in surface moisture and humidity also changes the amount of convective cooling that can occur for the same temperature distribution.

Changes in the sun can of course affect the amount of energy received by the earth through changes in its output, variations in the intensity of UV - light, or perhaps even clouds through galactic cosmiChanges in the sun can of course affect the amount of energy received by the earth through changes in its output, variations in the intensity of UV - light, or perhaps even clouds through galactic cosmichanges in its output, variations in the intensity of UV - light, or perhaps even clouds through galactic cosmic rays.

Since the mechanism I lay out depends on clouds and their formation, and not on the total amount of forcing, changes in CO2 won't change the operating temperature.

The current flow in the atmosphere changes the amount of low level cloud in the high latitude regions and changes the optical properties and lifetime of clouds in the equatorial region (is the primary reason for El Niño events).

The third way is through the effects of cosmic rays on cloud formations.The amount of energy we get from the sun changes in cycles.

The exact amount of this temperature increase, however, remains uncertain because of unpredictable changes in other atmospheric components, especially cloud cover.

However, Lindzen's analysis of the experimental data suggests that «negative feedbacks» (e.g., changes in cloud cover) act to decrease the amount of warming from increases in CO2.

Spencer / Braswell and Lindzen / Choi look at the relationship between changes in ocean heat, cloud cover (directly affecting the amount of heat lost to space), and global surface temperature over recent decades.

One last point related to my last post, is the extent / degree of magnitude of a more meridional atmospheric circulation pattern (N.H. especially) could influence snow cover, cloud cover, and precipitation amounts which could set up stronger positive climatic feedbacks, which could then result in an even more significant climatic change going forward.

A number of studies have highlighted relationships between low - cloud amount changes under global warming and modeled variations of low clouds with changes in specific meteorological conditions (such as surface temperature, inversion strength, subsidence)(Qu et.

When you compare this with the actual surface temperature of ~ 288 K and the temperature in absence of the greenhouse effect but no change in albedo of ~ 255 K, what we can say is the follows: The greenhouse effect due to all the greenhouse gases (water vapor, clouds, and the long - lived GHGs like CO2 and CH4) raises the temperature of the Earth by an amount of ~ 33 K (which is 288K — 255K); the albedo due to cloud reduces the temperature by ~ 17 K (which is 272 K — 255 K); the net effect of both the GHGs and the cloud albedo is ~ 16 K (which is 288K — 272K).

Recently here in SW Virginia there has been a slight change in the methods they are using, instead of trails from horizon to horizon there are now «clouds» which are strange in that they are relatively all the same size, not billowy like they would normally be but solid in the middle and then all wispy and fuzzy on the edges and all lined up in a row, like they are starting and stopping the amount of stuff they are using.

As climate forcing and temperature increase, the amount of water vapour in the air increases and clouds may change.

As a result of changes in rainfall production, the amount of liquid water in the cloud may be modified, changing the amount of energy available for release as latent heat during freezing (Rosenfeld et al. 2008); these changes may potentially lead to significant alterations in storm vorticity strength (Tinsley et al. 2012).

Changes in cloud geographical location and cloud amount are significant, but play a smaller role in driving radiative flux cChanges in cloud geographical location and cloud amount are significant, but play a smaller role in driving radiative flux changeschanges.

Because of the nearly constant seasonal and long - term 340nm surface reflectivity, the 340nm LER can be used to estimate changes in cloud plus 10 aerosol amount associated with seasonal and interannual variability and decadal climate change.

Thus if the two mid latitude jets move equatorward at the same time as the ITCZ moves closer to the equator the combined effect on global albedo and the amount of solar energy able to penetrate the oceans will be substantial and would dwarf the other proposed effects on albedo from changes in cosmic ray intensity generating changes in cloud totals as per Svensmark and from suggested changes caused in upper cloud quantities by changes in atmospheric chemistry involving ozone which various other climate sceptics propose.

Berkeley Lab researchers Dev Millstein and Surabi Menon found that atmospheric feedback — such as changes in cloud cover or precipitation — does have an important effect, resulting in different amounts of cooling in different cities, but that cool roofs and pavements are still beneficial for combating global warming.

When you have huge economic issues and great amounts of uncertainty with regard to things like sensitivity to a doubling of CO2, feedbacks from evaporation (including increases in clouds and their feedbacks), not to mention regarding consequences, then a legalisitic, «does climate change exist or not» approach isn't the right way to think about the issue.

The direct CO2 radiative forcing is the change in infrared radiative fluxes for a doubling CO2 (typically from 287 to 574 ppm), without any feedback processes (e.g. from changing atmospheric water vapor amount or cloud characteristics.)

But this amount could increase if nighttime cloud cover were to become more common in the future as a result of climate change.