Sentences with phrase «cirrus clouds by»

The authors propose that higher ocean surface temperatures directly cause the decline in cirrus clouds by changing the dynamics of cloud formation and rainfall.

This study examines the horizontal distribution of cirrus clouds by means of satellite imagery analyses and numerical weather prediction model forecasts.

Not exact matches

High - altitude clouds like cirrus warm the planet by trapping heat.

In high cirrus clouds, which consist purely of ice crystals, the researchers, however, came across a surprisingly strong reaction to laser irradiation: As described in PNAS, the laser pulses increase the number of ice particles by up to a factor of 100 within only a few seconds.

In contrast, an increase in the intensity of sub-tropical anticyclones observed in ECHAM4 results from a tropospheric warming promoted by excessive cirrus clouds attributed to a scale - dependent response in the relevant parametrization (Stendel and Roeckner, 1998).

The premise of Lindzen's hypothesis was that as the climate warms, the area in the atmosphere covered by high cirrus clouds will contract to allow more heat to escape into outer space, similar to the iris in a human eye contracting to allow less light to pass through the pupil in a brightly lit environment.

The iris hypothesis and the tropical upper tropospheric water vapor and cirrus cloud feedbacks, while arguably still open to debate, are not by any stretch of the imagination a major driver in global climate feedback.

The report considers all the gases and particles emitted by aircraft into the upper atmosphere and the role that they play in modifying the chemical properties of the atmosphere and initiating the formation of condensation trails (contrails) and cirrus clouds.

A recent Science paper (open link here), doesn't quite answer that question, but does provide a strong indicator by measuring the residues from the ice nuclei from which cirrus clouds form.

«Therefore, if we could remove all cirrus clouds, we could more than offset the warming caused by a doubling of CO2 [in the atmosphere].»

For example, theories published in the journal Science in July 2017 by lrike Lohmann and Blaž Gasparini, researchers at the Institute of Atmospheric and Climate Science at ETH Zurich in Switzerland, proposed reducing cirrus clouds that trap heat.

Depending on how much moisture is in the air, contrails can be long - lived, spreading out to look more like the wispy cirrus clouds made by Nature.

Emissions, they discovered, increased the fraction of cirrus clouds where vapor trails were most prevalent but decreased the fraction in some areas by increasing the temperature and consequently decreasing the relative humidity in the lower atmosphere.

A decrease in cirrus cloud area would have a cooling effect by allowing more heat energy, or infrared radiation, to leave the planet.

Is this neglect of cirrus clouds and long wavelengths due to advice given by James Lovelock or Richard Lindzen?

It indicated that contrails — white lines of Vapor left by jet engines — also have big knock - on effects by adding to the formation of high - altitude, heat - trapping cirrus clouds as the lines break up.

NASA scientists have found that cirrus clouds, formed by contrails from aircraft engine exhaust, are capable of increasing average surface temperatures enough to account for a warming trend in the United States that occurred between 1975 and 1994.

The study, by experts at the DLR German Aerospace Center, estimated that the net warming effect for the Earth of contrails and related cirrus clouds at any one time was 31 milliwatts per square meter, more than the warming effect of accumulated CO2 from aviation of 28 milliwatts.

Specifically, whereas Lindzen's experiment predicts that cirrus clouds change in extent to reduce warming at the surface by anywhere from 0.45 to 1.1 degrees, Lin's experiment predicts that changes in the tropical clouds will help warm the surface by anywhere from 0.05 to 0.1 degree (Lin et al. 2001).