Water Vapor Confirmed as the Major Player in Climate Change

[megimoo]

snip

Climate models have estimated the strength of water vapor feedback, but until now the record of water vapor data was not sophisticated enough to provide a comprehensive view of at how water vapor responds to changes in Earth's surface temperature. That's because instruments on the ground and previous space-based could not measure water vapor at all altitudes in Earth's troposphere -- the layer of the atmosphere that extends from Earth's surface to about 10 miles in altitude.

AIRS is the first instrument to distinguish differences in the amount of water vapor at all altitudes within the troposphere. Using data from AIRS, the team observed how atmospheric water vapor reacted to shifts in surface temperatures between 2003 and 2008. By determining how humidity changed with surface temperature, the team could compute the average global strength of the water vapor feedback.

“This new data set shows that as surface temperature increases, so does atmospheric humidity,” Dessler said. “Dumping greenhouse gases into the atmosphere makes the atmosphere more humid. And since water vapor is itself a greenhouse gas, the increase in humidity amplifies the warming from carbon dioxide."

Specifically, the team found that if Earth warms 1.8 degrees Fahrenheit, the associated increase in water vapor will trap an extra 2 Watts of energy per square meter (about 11 square feet).

"That number may not sound like much, but add up all of that energy over the entire Earth surface and you find that water vapor is trapping a lot of energy," Dessler said. "We now think the water vapor feedback is extraordinarily strong, capable of doubling the warming due to carbon dioxide alone."snip

http://earthobservatory.nasa.gov/Newsroom/view.php?id=35952

[megimoo]

NBC Fires Weather Channel Environmental Unit ,Some on-camera meteorologists also let go

NBC Universal made the first of potentially several rounds of staffing cuts at The Weather Channel (TWC) on Wednesday, axing the entire staff of the "Forecast Earth" environmental program during the middle of NBC's "Green Week," as well as several on-camera meteorologists.

The layoffs totaled about 10 percent of the workforce, and are among the first major changes made since NBC completed its purchase of the venerable weather network in September.

The layoffs affected about 80 people, but left the long-term leadership of the network unclear, according to a source who requested anonymity due to the continuing uncertainty at the station.

Among the meteorologists who was let go was Dave Schwartz, a Weather Channel veteran and a viewer staple due to his lively on camera presentations. USA Today reported that meteorologists Cheryl Lemke and Eboni Deon were also let go.

The timing of the Forecast Earth cancellation was ironic, since it came in the middle of NBC's "Green Week," during which the network has been touting its environmental coverage across all of its platforms. Forecast Earth normally aired on weekends, but its presumed last episode was shown on a weekday due to the environmentally-oriented week.

Forecast Earth was hosted by former CNN anchor Natalie Allen, with contributions from climate expert Heidi Cullen. It was the sole program on TWC that focused on global climate change, which raises the question of whether the station will still report on the subject. Cullen's future role at the network is not known.

NBC released the following statement in response to questions about the firings:

The economic realities of recent months have created challenges for everyone in our business. In addition, when NBC Universal purchased the Weather Channel earlier this year, we expected that there would be cost synergies as part of a company reorganization. While it is always difficult to lose valued employees, we are doing our best to minimize the impact, and remain committed to providing the highest quality content that our viewers have come to expect from the Weather Channel.


http://voices.washingtonpost.com/capitalweathergang/2008/11/nbc_fires_twc_environmental_un.html

[RightCoast]

Good thing fuel cell vehicles don't emit water vapor as exhaust!  Oh, wait.

[JohnnyReb]

Good thing fuel cell vehicles don't emit water vapor as exhaust!  Oh, wait.

Right, just ice cubes and bottled water.....Drunks and limo liberals are going to love'em.

[Eupher]

"I don't care who you are, that's funny right there"