chemtrails.cc

Tag: global cooling

UK MET office fails to acknowledge particulate aerosol responsible for cloud nucleation

by qbit on Apr.19, 2010, under In the News, Optical Phenomena, What are they?

I’m reposting this propaganda for one reason.  Occasionally I see WW2-era pictures of propeller planes forming thick contrails; even what appear to be persistent chemtrails.   The obvious question to ask is ‘If chemtrails are formed by a jet fuel additive, how do you explain these pictures of thick contrails in old photos of propeller planes?’

The answer is simple.  Lead.  These old propeller planes used lead (tetra ethyl lead) in the fuel as an anti-knock agent.  It doesn’t particularly matter (no pun intended) which metallic aerosol is present in the exhaust.  The nucleation sites still increase water droplet and ice crystal formation and reduce their tendency to evaporate/sublimate into invisible gas in dry high altitude air.  Of course water vapor is a major byproduct of hydrocarbon combustion so if there are nucleation sites present, the water will tend to condense and persist in visible droplets or ice crystals more than if the fuel were clean burning with fewer nucleation sites.

Climate pimps like the UK Met will rarely acknowledge metallic aerosols  when discussing persistent contrail formation.  They will only refer to “vapor trails.”  But the MET is closely connected to UK’s Ministry of Defense, so it’s assumed everything they publish will have some propaganda value.  Why did they choose a picture of old propeller planes forming contrails, not satellite photos like these or modern jet aircraft that better illustrate the scope of the chemtrail program?

——————————–

Contrails Creating Clouds

Dr Jim Haywood, Met Office

Ben – Most of us are familiar with the long trails left behind by airplanes as they pass overhead.  But those trails, or contrails as they’re called, can actually give rise to clouds.  We’re joined by Dr. Jim Haywood who’s from the Met office.  Now thank you for joining us, Jim.  My first question really to get a broad idea is how were clouds normally formed?

Jim –   Well, clouds almost invariably form when the air that contains the water vapour cools.  Cooling is almost always initiated by a lifting action.  For example, air flowing over mountains can cause the air to cool to such an extent that the water in it condenses, forming a cloud.  Alternatively, you can have things like cool air undercutting warm air and forcing it to rise in frontal systems associated with low pressure systems in the mid latitudes.  So really, it’s just a case of air being forced to cool, the relative humidity – as meteorologists call it – exceeds 100% and the water in it condenses.

ContrailsBen –   When we see these big lines up in the sky, these contrails from airplanes, what are they actually made of?

Jim –   Obviously, most clouds that we can see from down here are made up of water droplets.  Contrails tend to be made up of ice crystals that grow when the conditions are favourable.

Ben –   How do these then go on to create a cloud?

Jim –   What you can get is – under certain conditions, which is basically cold and moist conditions  – the ice crystals that are initially formed by the aircraft contrail can grow.  It’s a bit like a physics experiment that you probably did at school where you grow crystals of copper sulphate or things in supersaturated solutions.  That’s exactly what’s happening here.  When the conditions are right, it’s cold enough and moist enough up in our atmosphere then the crystals that are initially injected can just grow tremendously and spread with the metrological flow.

Ben –   So we’re not talking about lots of individual particles like we will be for a normal cloud.  This is actually a very large ice crystal that just happens to be light enough to float about.  Is that right?

Jim –   The ice crystals, when they’re initially injected are about a 1000th of a millimetre typically in terms of size.  But as they grow, they can actually get many times that up to about 100 microns.  So, they do form very large crystals which are important in the earth’s radiation budget.

Ben –   These clouds are a bit different than normal clouds.  How do they affect the weather?  Are they rain clouds?  Are we likely to see rain from them or just perhaps a bit of shading or will they not affect us much at all?

Jim –   Well they do affect us in terms of the amount of sunlight that they let through.  That’s quite important.  They tend to reflect sunlight back out to space and lead to a cooling of the weather and consequently, the climate.  But they also trap out going long wave radiation.  So, heat radiation if you like, rather like the greenhouse effect.  So there’s these two competing effects.  You’ve got the reflection of solar radiation or sunlight back out to space and you’ve also got a greenhouse type of effect.  And what’s critical is really the balance between the cooling from the reflection of solar radiation and the warming due to the greenhouse type of effect of these crystals.

Ben –   So if they need particular conditions in which to form, does this mean that certain flight paths are actually more likely to create these clouds and therefore, we’re more likely to have this warming effect or this reduction of sunlight effect in certain areas?

Jim –   Yes, that’s right.  I mean, one of the area that’s particularly good for forming cirrus types of particles – these ice crystals – actually coincides with the air traffic corridors, particularly the one linking North America with Europe.  That’s a particular area that’s good for crystal formation and crystal growth.

Ben –   We’ve had a very, very relevant question from Neil Briscoe.  He said that he heard a while ago – thanks to the 9/11 attacks – when they grounded all the flights, people were able to work out the contrails during daylight hours, helped to prohibit warming by reflecting light back out into space.  But during night time, they actually increased warming.  Is this the same stuff that we’re talking about here?  Does it matter whether it’s day or night?

Jim –   Yes, it does indeed.  It’s exactly what that question is about.  Really, we’re talking about a cooling, if you like from the reflection of sunlight and a warming during the night time which can cause a reduction in what’s called the diurnal temperature range.  After 9/11, there was certainly evidence of a reduction in the diurnal temperature range from a particular study.  But it’s quite difficult to disentangle that signal, if you like from the natural meteorological events that can occur.  And when they looked at it in a little bit more detail, it became almost impossible to distinguish from other events that had nothing to do with 9/11.  You still could see this signal in diurnal temperature range, just due to the natural variability of the atmospheric system.

Ben –   So it may have an impact that we can’t see because it’s no bigger than noise.

Jim –   It’s just difficult to detect.  That’s right.

Ben –   And speaking of detecting it, how do we actually study these things?

Jim – Well, we study it by a number of ways.  We’ve been simulating these contrails and contrails induce cirrus in the state-of-the-science atmospheric models that we use at the Met office and the Hadley Centre for Climate Change.  We’ve also been having a look at various different aircraft measurement campaigns.  I’m involved with an aircraft measuring campaign where we’re trying to create contrails and actually measure the amount of reflected sunlight, and the amount of infrared heat energy that these contrails affect.  So, you can do it from a purely modelling perspective but it’s always better to base it on objective measurements.

Ben –   And, just finally, these contrails obviously tend to stay in one place in the sky.  When they go on to create this cirrus type clouds, do they also stay where they were created or do we find that they drift across the country and have that sort of effect on a slightly wider area?

Jim –   Yes.  We studied one particular contrail that was formed by an Awacs aircraft over the north sea and what we found was although that aircraft had only travelled 1500 kilometres, the area of cloud that it created was actually over 50,000 square kilometres.  This area of cloud – this was created last March – you could see quite clearly being vectored over the UK and lasted for several hours.  It actually lasted for around about 18 hours before the ice crystals started to dissipate.

Ben –   So that’s certainly something to think about next time you’re 30,000 feet above the UK.  You might actually be making it literally cooler for us down on earth in the daytime, possibly a little warmer at night.  That was Jim Haywood.  He’s from the Met Office.

March 2010

Leave a Comment :, , , , more...

Scientists Considered Pouring Soot Over the Arctic in the 1970s to Help Melt the Ice – In Order to Prevent An Ice Age

by qbit on Dec.18, 2009, under In the News

By George Washington (about the author)

opednews.com Permalink

For OpEdNews: George Washington – Writer

Preface: I have been an environmentalist my whole life. I have an extensive resume working in the environmental field: I campaigned for preservation of wilderness, for a reduction in urban pollution, for taking pesticide residues out of foods, etc. Indeed, I have previously campaigned against global warming.

I studied environmental science at a top university in the early 1980’s. I was taught – as Al Gore was taught in college – that temperatures are directly correlated with CO2 levels. For 2 decades (until very recently), I believed that anyone questioning any aspect of global warming was paid by big oil or big coal, or influenced by someone who was.

One of the main reasons for writing this essay is to point out that we must make sure that our “solutions” are not more dangerous than the problems themselves. For example, the Washington Post noted that the government forced a switch from one type of chemical to another because it was believed the first was enlarging the ozone hole. However, according to the Post, the chemical which the government demanded be used instead is 4,470 times more potent as a greenhouse gas than carbon dioxide.

Currently, “government scientists are studying the feasibility of sending nearly microscopic particles of specially made glass into the Earth’s upper atmosphere to try to dampen the effects of ‘global warming.’” Others are currently suggesting cutting down trees and burying them. Other ways to geoengineer the planet are being proposed.

And
Noam Chomsky has said that he would submit to fascism if it would help combat global warming:

Suppose it was discovered tomorrow that the greenhouse effects has been way understimated, and that the catastrophic effects are actually going to set in 10 years from now, and not 100 years from now or something.

Well, given the state of the popular movements we have today, we’d probably have a fascist takeover-with everybody agreeing to it, because that would be the only method for survival that anyone could think of. I’d even agree to it, because there’s just no other alternatives right now.” (page 388).

Are those ideas any better than pouring soot on the North Pole?

Our primary responsibility must be to ensure that we are not doing more harm than good.

On April 28, 1975, Newsweek wrote an article stating:

Climatologists are pessimistic that political leaders will take any positive action to compensate for the climatic change, or even to allay its effects. They concede that some of the more spectacular solutions proposed, such as melting the Arctic ice cap by covering it with black soot or diverting arctic rivers, might create problems far greater than those they solve. But the scientists see few signs that government leaders anywhere are even prepared to take the simple measures of stockpiling food or of introducing the variables of climatic uncertainty into economic projections of future food supplies. The longer the planners delay, the more difficult will they find it to cope with climatic change once the results become grim reality.

Here is a reprint of the article in the Washington Times, and here is a copy of the 1975 Newsweek article.

Why were scientists considering melting the arctic ice cap?

Because they were worried about a new ice age.

Newsweek discussed the 1975 article in 2006:

In April, 1975 … NEWSWEEK published a small back-page article about a very different kind of disaster. Citing “ominous signs that the earth’s weather patterns have begun to change dramatically,” the magazine warned of an impending “drastic decline in food production.” Political disruptions stemming from food shortages could affect “just about every nation on earth.” Scientists urged governments to consider emergency action to head off the terrible threat of . . . well, if you had been following the climate-change debates at the time, you’d have known that the threat was: global cooling…

Citizens can judge for themselves what constitutes a prudent response-which, indeed, is what occurred 30 years ago. All in all, it’s probably just as well that society elected not to follow one of the possible solutions mentioned in the NEWSWEEK article: to pour soot over the Arctic ice cap, to help it melt.

Newsweek was not alone. Some scientists and the press have been warning about an ice age off and on for over 100 years.

For example, on February 24, 1895, the New York Times published an article entitled “PROSPECTS OF ANOTHER GLACIAL PERIOD; Geologists Think the World May Be Frozen Up Again”, which starts with the following paragraph:

The question is again being discussed whether recent and long-continued observations do not point to the advent of a second glacial period, when the countries now basking in the fostering warmth of a tropical sun will ultimately give way to the perennial frost and snow of the polar regions.

In September 1958, Harper’s wrote an article called “The Coming Ice Age”.

On January 11, 1970, the Washington Post wrote an article entitled “Colder Winters Held Dawn of New Ice Age – Scientists See Ice Age In the Future” which stated:

Get a good grip on your long johns, cold weather haters–the worst may be yet to come. That’s the long-long-range weather forecast being given out by “climatologists.” the people who study very long-term world weather trends.

In 1972, two scientists – George J. Kukla (of the Lamont-Doherty Geological Observatory) and R. K. Matthews (Chairman, Dept of Geological Sciences, Brown University) – wrote the following letter to President Nixon warning of the possibility of a new ice age:

Dear Mr. President:

Aware of your deep concern with the future of the world, we feel obliged to inform you on the results of the scientific conference held here recently. The conference dealt with the past and future changes of climate and was attended by 42 top American and European investigators. We enclose the summary report published in Science and further publications are forthcoming in Quaternary Research.

The main conclusion of the meeting was that a global deterioration of climate, by order of magnitude larger than any hitherto experience by civilized mankind, is a very real possibility and indeed may be due very soon.

The cooling has natural cause and falls within the rank of processes which produced the last ice age. This is a surprising result based largely on recent studies of deep sea sediments.

Existing data still do not allow forecast of the precise timing of the predicted development, nor the assessment of the man’s interference with the natural trends. It could not be excluded however that the cooling now under way in the Northern Hemisphere is the start of the expected shift. The present rate of the cooling seems fast enough to bring glacial temperatures in about a century, if continuing at the present pace.

The practical consequences which might be brought by such developments to existing social institution are among others:

(1) Substantially lowered food production due to the shorter growing seasons and changed rain distribution in the main grain producing belts of the world, with Eastern Europe and Central Asia to be first affected.

(2) Increased frequency and amplitude of extreme weather anomalies such as those bringing floods, snowstorms, killing frosts, etc.

With the efficient help of the world leaders, the research “

With best regards,

George J. Kukla (Lamont-Doherty Geological Observatory)

R. K. Matthews (Chairman, Dept of Geological Sciences, Brown U)

The White House assigned the task of looking at the claims contained in the letter to its science agencies, especially the National Science Foundation and NOAA, who engaged in a flurry of activity looking into the threat of an ice age.

On August 1, 1974 the White House wrote a letter to Secretary of Commerce Frederick Dent stating:

Changes in climate in recent years have resulted in unanticipated impacts on key national programs and policies. Concern has been expressed that recent changes may presage others. In order to assess the problem and to determine what concerted action ought to be undertaken, I have decided to establish a subcommittee on Climate Change.

Out of this concern, the U.S. government started monitoring climate.

As NOAA scientists Robert W. Reeves, Daphne Gemmill, Robert E. Livezey, and James Laver point out:

There were also a number of short-term climate events of national and international consequence in the early 1970s that commanded a certain level of attention in Washington. Many of them were linked to the El Niño of 1972-1973.
A killing winter freeze followed by a severe summer heat wave and drought produced a 12 percent shortfall in Russian grain production in 1972. The Soviet decision to offset the losses by purchase abroad reduced world grain reserves and helped drive up food prices.

Collapse of the Peruvian anchovy harvest in late 1972 and early 1973, related to fluctuations in the Pacific ocean currents and atmospheric circulation, impacted world supplies of fertilizer, the soybean market, and prices of all other protein feedstocks.

The anomalously low precipitation in the U.S. Pacific north-west during the winter of 1972-73 depleted reservoir storage by an amount equivalent to more than 7 percent of the electric energy requirements for the region.On June 24, 1974, Time Magazine wrote an article entitled “Another Ice Age?” which stated:

As they review the bizarre and unpredictable weather pattern of the past several years, a growing number of scientists are beginning to suspect that many seemingly contradictory meteorological fluctuations are actually part of a global climatic upheaval. However widely the weather varies from place to place and time to time, when meteorologists take an average of temperatures around the globe they find that the atmosphere has been growing gradually cooler for the past three decades. The trend shows no indication of reversing. Climatological Cassandras are becoming increasingly apprehensive, for the weather aberrations they are studying may be the harbinger of another ice age.

Telltale signs are everywhere …

Whatever the cause of the cooling trend, its effects could be extremely serious, if not catastrophic. Scientists figure that only a 1% decrease in the amount of sunlight hitting the earth’s surface could tip the climatic balance, and cool the planet enough to send it sliding down the road to another ice age within only a few hundred years.

(here’s the printer-friendly version).

Science News wrote an article in 1975 called “Chilling Possibilities” warning of a new ice age.

A January 1975 article from the New York Times warned:

The most drastic potential change considered in the new report (by the National Academy of Sciences) is an abrupt end to the present interglacial period of relative warmth that has governed the planet’s climate for the past 10,000 years.

A May 21, 1975 article in the New York Times again stated:

Sooner or later a major cooling of the climate is widely considered inevitable.

A 1994 Time article entitled “The Ice Age Cometh?” stated:

What ever happened to global warming? Scientists have issued apocalyptic warnings for years, claiming that gases from cars, power plants and factories are creating a greenhouse effect that will boost the temperature dangerously over the next 75 years or so. But if last week is any indication of winters to come, it might be more to the point to start worrying about the next Ice Age instead. After all, human-induced warming is still largely theoretical, while ice ages are an established part of the planet’s history. The last one ended about 10,000 years ago; the next one — for there will be a next one — could start tens of thousands of years from now. Or tens of years. Or it may have already started.


Note 1: Given that scientists considered pouring soot on the North Pole to melt the ice in the 1970’s, it should come as no surprise that soot may be having a dramatic effect on the ice sheets and glaciers now.

Note 2: Some global warming advocates warn that a warming-induced shut down of the huge ocean current known as the thermohaline circulation could cause a new ice age in certain limited parts of the world that are warmed by the by the North Atlantic current, such as Iceland, Ireland, the Nordic countries, and Britain. But scientists in the 1970s were talking about something different: the start of a worldwide ice age due, for example, to a 100,000 year cycle in solar radiation hitting the Earth.


Note 3: I not only do not receive a penny from oil or any other energy, industry or political person or organization of any nature whatsoever (I make a few peanuts from ads on my site, which I do not choose, but are selected without my input by my ad service), I am also wholly and completely against big oil, big coal and big nuclear. As I have repeatedly argued, power should be taken away from the oil giants and decentralized. I have repeatedly argued for microgeneration and for alternative energy. These things are beneficial for a number of reasons – including better health, less corruption of our political systems through decentralization of power, and a boost to our economy – in addition to whatever climate benefits they may have.

Note 4: For further information on the swing between warnings of ice ages and runaway global warming, see this and this. I have verified all of the facts made in the main post above, but I have not yet verified all of the claims made in the last two aforementioned web pages.

Leave a Comment :, , , more...

Search

Still can't find what you're looking for? Please post a comment or contact us.