[Gasification] Aviation's role in global warming...9/11 aftermath proves theories on H20 in contrails in dramatic fashion.

Wed Mar 19 08:02:08 CDT 2008

In essence, you can halt global warming in 3 days, by limiting night jet
flights and flights above 25,000 ft; and end all the carbon trading schemes
and mass hysteria over CO2 emissions.

It's never this simple and we have the miracle of halting nearly all air
traffic for 3 days, a dramatic experiment that no end of models could
duplicate.....you could say that 9/11 ended global warming...excuse me, a
Mr. Gore is on the phone! lol

Frank J. Heller, MPA
KATAHDIN ENERGY WORKS
12 Belmont St.
Brunswick, ME 04011-3004
207.729.6090
http://mysite.verizon.net/fjheller/

-----Original Message-----
From: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org] On Behalf Of Greg and April
Sent: Wednesday, March 19, 2008 12:49 PM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] Aviation's role in global warming...9/11
aftermath proves theories on H20 in contrails in dramatic fashion.

I will have to see if I can locate the article I read, but I was under the 
belief that while there was a 1-2 degree increase in the daily temp there 
was also a 2-3 degree decrease in night time temps thus a net decrease in 
the average daily temperature.

Greg H.

----- Original Message ----- 
From: "Rob Williams" <rbwilliams at ucdavis.edu>
To: <gasification at listserv.repp.org>
Sent: Tuesday, March 18, 2008 20:46
Subject: Re: [Gasification] Aviation's role in global warming...9/11 
aftermath proves theories on H20 in contrails in dramatic fashion.

>
> Lack of condensation trails over US immediately after 9/11, 2001 seem to
> increase diurnal temperature range. Also, a net cooling effect can be
> argued. See link and abstract,
>
> http://www.atmos.berkeley.edu/news/cohen_jul2002.article
>
>
> Travis, D.J., A.M. Carleton, and R.G. Lauritsen, (2004). Regional
> variations in US diurnal temperature range for the 11-14 September 2001
> aircraft groundings: Evidence of jet contrail influence on climate. 
> Journal
> of Climate. 17(5): p. 1123-1134.
>
> Abstract: The grounding of all commercial aircraft within U. S. airspace
> for the 3-day period following the 11 September 2001 terrorist attacks
> provides a unique opportunity to study the potential role of jet aircraft
> contrails in climate. Contrails are most similar to natural cirrus clouds
> due to their high altitude and strong ability to efficiently reduce
> outgoing infrared radiation. However, they typically have a higher albedo
> than cirrus; thus, they are better at reducing the surface receipt of
> incoming solar radiation. These contrail characteristics potentially
> suppress the diurnal temperature range (DTR) when contrail coverage is 
> both
> widespread and relatively long lasting over a specific region. During the
> 11-14 September 2001 grounding period natural clouds and contrails were
> noticeably absent on high-resolution satellite imagery across the regions
> that typically receive abundant contrail coverage. A previous analysis of
> temperature data for the grounding period reported an anomalous increase 
> in
> the U.S.-averaged, 3-day DTR value. Here, the spatial variation of the DTR
> anomalies as well as the separate contributions from the maximum and
> minimum temperature departures are analyzed. These analyses are undertaken
> to better evaluate the role of jet contrail absence and synoptic weather
> patterns during the grounding period on the DTR anomalies.
>
> It is shown that the largest DTR increases occurred in regions where
> contrail coverage is typically most prevalent during the fall season (from
> satellite-based contrail observations for the 1977-79 and 2000-01 
> periods).
> These DTR increases occurred even in those areas reporting positive
> departures of tropospheric humidity, which may reduce DTR, during the
> grounding period. Also, there was an asymmetric departure from the normal
> maximum and minimum temperatures suggesting that daytime temperatures
> responded more to contrail absence than did nighttime temperatures, which
> responded more to synoptic conditions. The application of a statistical
> model that "retro-predicts" contrail-favored areas (CFAs) on the basis of
> upper-tropospheric meteorological conditions existing during the grounding
> period, supports the role of contrail absence in the surface temperature
> anomalies; especially for the western United States. Along with previous
> studies comparing surface climate data at stations beneath major flight
> paths with those farther away, the regionalization of the DTR anomalies
> during the September 2001 "control" period implies that contrails have 
> been
> helping to decrease DTR in areas where they are most abundant, at least
> during the early fall season.
>
>
> At 07:05 PM 3/18/2008, you wrote:
>>Ah Frank,
>>
>>
>>Just in case you haven't noticed, CO2 doesn't make contrails - it's the
>>water vapor in the jet exhaust that makes the contrails, and everyone 
>>knows
>>that water vapor is a stronger greenhouse gas than CO2.    Contrails are
>>nothing more than the water vapor from the exhaust that is condensing to 
>>for
>>a type of cloud.
>>
>>
>>What's going on is that everyday, all day long, jet's go back and forth
>>laying down a blanket of water vapor that may not be letting as much heat
>>out at night.
>>
>>In this case, it not CO2, but water vapor, that is the active principle.
>>
>>Greg H.
>>
>>
>>----- Original Message -----
>>From: "Katahdin Energy Works" <KatahdinEnergyWorks at verizon.net>
>>To: "'Discussion of biomass pyrolysis and gasification'"
>><gasification at listserv.repp.org>
>>Sent: Tuesday, March 18, 2008 13:46
>>Subject: Re: [Gasification] Aviation's role in global warming...9/11
>>aftermath proves theories on H20 in contrails in dramatic fashion.
>>
>>
>> > "Station Crew Notes Absence of American Air Traffic in Wake of 
>> > Terrorist
>> > Attacks
>> > By Todd Halvorson
>> > Cape Canaveral Bureau Chief
>> > posted: 01:26 pm ET
>> > 14 September 2001
>> > CAPE CANAVERAL, Fla. The International Space Stations crew spied yet 
>> > more
>> > evidence Friday of the aftermath of this weeks terrorists attacks on
>> > America: the lack of air traffic over the continental United States.
>> >
>> > Three days after suicide airplane hijackers toppled the World Trade 
>> > Center
>> > in New York and slammed into the Pentagon in Washington, D.C., the 
>> > station
>> > crew noted an obvious absence of airborne jetliners from their perch 
>> > 240
>> > miles (384 kilometers) above Earth.
>> >
>> > "Ill tell you one thing that's really strange: Normally when we go over
>> > the
>> > U.S., the sky is like a spider web of contrails," U.S. astronaut and
>> > outpost
>> > commander Frank Culbertson told flight controllers at NASAs Mission
>> > Control
>> > Center in Houston.
>> >
>> > "And now the sky is just about completely empty. There are no contrails

>> > in
>> > the sky," he added. "Its very, very weird."
>> >
>> > "I hadn't thought of that perspective," fellow astronaut Cady Coleman
>> > replied"
>> >
>> > ....neither did IPCC; but a subsequent research study revealed a 1 
>> > degree
>> > C.
>> > change in temperature as, once again; normal cooling of the land masses
>> > beneath these corridors took place--- and as every school child knows;
>> > that
>> > equals the rise in global warming measured over the past fifty years.
>> >
>> > ...I rest my case on the relatively insignificant role CO2 plays in
>> > G.Warming.!
>> >
>> > Frank J. Heller, MPA
>> > KATAHDIN ENERGY WORKS
>> > 12 Belmont St.
>> > Brunswick, ME 04011-3004
>> > 207.729.6090
>> > http://mysite.verizon.net/fjheller/
>> >
>>
>>
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