Sentences with phrase «increased cirrus»

The most significant changes in the new D - series cloud datasets are: 1) revised radiance calibrations to remove spurious changes in the long - term record, 2) increased cirrus detection sensitivity over land, 3) increased low - level cloud detection sensitivity in polar regions, 4) reduced biases in cirrus cloud properties using an ice crystal microphysics model in place of a liquid droplet microphysics model, and 5) increased detail about the variations of cloud properties.

Since more evaporation leads to more precipitation, most climate researchers expected increased cirrus cloudiness to follow warming.

The ice water path retrievals are smaller in magnitude than the radar estimates, and this difference grows with increasing cirrus thickness.

Not exact matches

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.

Intense laser light pulses increase the brightness of high cirrus clouds.

In addition, around the tropopause the air is close to saturation with water and a small increase of vapour from aircraft can create wide expanses of thin cirrus clouds that cause even stronger warming.

When I, with some colleagues at NASA, attempted to determine how clouds behave under varying temperatures, we discovered what we called an «Iris Effect,» wherein upper - level cirrus clouds contracted with increased temperature, providing a very strong negative climate feedback sufficient to greatly reduce the response to increasing CO2.

According to Beat in his nomination letter, «She is an excellent scientist whose research has greatly increased our knowledge of the radiative impact of cirrus clouds on the tropics.

goodsprk: It relies on not simply CO2, but on feedback from increased CO2 raising the temperature which increases the water vapor in the atmosphere which the alarmist assume will actually breaking up the low level clouds and forming high level cirrus clouds that will trap more heat.

It relies on not simply CO2, but on feedback from increased CO2 raising the temperature which increases the water vapor in the atmosphere which the alarmist assume will actually breaking up the low level clouds and forming high level cirrus clouds that will trap more heat.

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).

Lindzen and some scientists at NASA have offered a hypothesis that warming in the tropics will reduce high - cirrus cloudiness there, which will increase outgoing heat more than it increases the heating effect of incoming sunlight.

At the moment, Lindzen is pursuing a theory that says increased amounts of water vapor — from warming surface temperatures — will reduce heat - trapping high - cirrus clouds, which will help balance the planet's temperature.

Every model assumes that tropical - region cirrus cloud cover, which has a net warming effect on surface temperatures, increases with increasing surface temperature — a positive feedback.

A sea surface temperature increase in the tropics would result in reduced cirrus clouds and thus more infrared radiation leakage from Earth's atmosphere.

When I, with some colleagues at NASA, attempted to determine how clouds behave under varying temperatures, we discovered what we called an «Iris Effect,» wherein upper - level cirrus clouds contracted with increased temperature, providing a very strong negative climate feedback sufficient to greatly reduce the response to increasing CO2.

A more recent report from NASA documented a 1 percent per decade increase in cirrus cloud cover over the United States, presumably due to increased air travel.

Chemically, there will be an increase in ozone depletion (due to increases in heterogenous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime.

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.

Chemically, there will be an increase in ozone depletion (due to increases in heterogeneous surface chemistry in the stratosphere), increases in acid rain, possibly an increase in high cirrus cloud cover due to indirect effects of the sulphates on cloud lifetime.

There is also no evidence that Pinatubo led to significant increases in cirrus clouds.

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.

Boucher (1999) and Fahey et al. (1999) have shown evidences that cirrus occurrence and coverage may have increased in regions of high air traffic compared with the rest of the globe.

Laaksonen et al. (1997) argued that nitric acid pollution is able to cause an increase in supercooled cirrus cloud droplet concentrations, and thereby influence climate (see Chapter 5, Section 5.3.6).