PDA

View Full Version : Global Dimming


tiptap
04-21-2006, 08:34 AM
In the aftermath of 9/11 the entire civilian fleet of jets were grounded. This provided a test window for a newly delineated effect of human fossil fuel burning.

In the the 1950's there were several scientific studies that measured the solar output reaching the ground. Station were set up across some areas and the total radiant light energy reaching the ground was measured. This was done to determine the amount of water needed to grow crops. This was especially important in Israel and other semi arid regions in order to balance water needs as to be sufficient and at the same time not waste a limited resource. In the 1990 the solar flux was again measured at the the same sites in Israel.

In those same period and consistently, throughout the world until today, Agricultural Researchers had stations set up "Pan Evaporation Rate" studies. Simply, measurements of the amount of water, exposed to the sun, to return the pan to the same level of water as the previous day. This was done for 50 to 100 years.

Both studies, independent methods, came up with the almost the exact same results. The amount of solar energy reaching the ground had dropped by a minumum of 10%. As much as 30% in Russia. The correlation was unrefutable.

Let's repeat this, solar energy was scattered/reflected by particulate material that came from man produced activity that decreased the amount of sun hitting the surface by at least 10% in industrial areas for the latter half of the 20th century.

Now let's return to the 9/11 story. The opportunity to study the effects of solely jet trails production of reflective clouds was the result of the grounding. The findings were that the difference in the high and low temperatures for the 3 days of grounding were a 1 degree Celsius more than ALL OTHER DETERMINATIONS FOR 30 YEARS! This dramatic result was immediately reversed when flights resumed. The high/Low difference is thought to be the most constant determination in meterology and the dramatic jump something totally RADICAL in its size and clearly human produced.

What does this mean. 1) Clear and unambiguous proof that human activity can DRAMATICALLY effect climate quite apart from natural cycles. 2) That the greenhouse gas' effects have been mitigated by the scattering of particulate production by the same burning of fossil fuels. 3) That the actual global warming effects of greenhouse gases by themselves is UNDERREPRESENTED in global models; that is the true total effects of greenhouse gases has been masked by "Global Dimming" not included in most present global weather models.

The question should no longer be one of questioning the effect of human activity. It HAS to be what is to be done to REDUCE, not just mitigate, the gluttony that the world has developed for burning carbon.

Taken from information from several article but covered well from

http://www.bbc.co.uk/sn/tvradio/programmes/horizon/dimming_trans.shtml

'Hamas' Jenkins
04-21-2006, 08:42 AM
By the logic of this argument, wouldn't the burning of fossil fuels then lead to the scattering of solar rays which would actually DECREASE global temperature rates, since it became hotter once flights were grounded? (assuming that this is not mere coincidence) I'm not sure I understand this argument.

tiptap
04-21-2006, 01:41 PM
By the logic of this argument, wouldn't the burning of fossil fuels then lead to the scattering of solar rays which would actually DECREASE global temperature rates, since it became hotter once flights were grounded? (assuming that this is not mere coincidence) I'm not sure I understand this argument.


And production of greenhouse gases carbon dioxide. And yes in OPPOSITION to the effect of greenhouse gases to hold in heat, scattering causes less solar energy in the first place to reach the ground. Yet still the NET effect is a global rise in temperature.

But both are by the same carbon burning process and we now have direct evidence of the IMMEDIATE and SUBSTANTIAL effect that particulate Global Dimming has on climate. It is a human activity affecting global climate and not just any activity but the same activity contributing to carbon dioxide increases. If we have this direct evidence for Global Dimming how can we be dismissive of greenhouse effect? It is a zero sum, 1st law of thermodynamics, argument that we must account for why temperatures are rising dispite a fall in the amount of energy initially reaching the ground. The heat retention must be that more efficient than what models have been used.

Human burning of fossil fuels has this direct, immediate, large effect on climate.