Thus although these individual cuts won't have a significant
direct impact on global temperatures, they can have a major indirect effect by triggering more widespread emissions cuts.
The figures reveal that carbon dioxide could have a
smaller impact on global temperatures than scientists predicted in 2007, opening the possibility greenhouse gas emissions do not have to be radically cut.
First, he says, the so - called Little Ice Age wasn't a major event in terms
of impact on global temperature: «While Europe cooled, the tropical Pacific was in an unusually warm state.
Beyond year - to - year variability such as El Niño there are decade - to - decade changes, such as the Interdecadal Pacific Oscillation, which has been shown to have a marked
impact on global temperature rise.
There is a
clear impact on global temperature, too, though the mechanisms are complex: heat released from the oceans; increases in water vapor, which enhance the greenhouse effect, and redistributions of clouds.
But co2 didn't start increasing until about the mid 1800s, and, with an average annual rate of increase of about 2 ppmv, it would have taken another century before its level would have increased enough to have had any
possible impact on our global temperature measurements.
«If the El Niño intensifies, it may have a
greater impact on the global temperatures, as observed from past events,» Jessica Blunden, a climate scientist with ERT, Inc., at the NOAA's National Climatic Data Center, said in an email.
«If history is a guide, it is safe to say that weak solar activity for a prolonged period of time can have a cooling
impact on global temperatures in the troposphere which is the bottom-most layer of Earth's atmosphere — and where we all live,» Vencore notes.
There is a
clear impact on global temperature, too, though the mechanisms are complex: heat released from the oceans; increases in water vapor, which enhance the greenhouse effect, and redistributions of clouds.
With each of EPA's three Lines of Evidence purporting to support their 2009 Endangerment Finding already shown in the CHECC petition and its first 2 Supplements to be invalid, EPA has no proof whatsoever that CO2 has had a statistically
significant impact on global temperatures.
If large amounts of undecayed matter were to defrost, decompose and release methane and carbon dioxide into the atmosphere,
the impact on global temperatures would most likely be enormous.
But awareness of carbon dioxide's
impact on global temperatures had been seeping through Exxon, from its rank - and - file engineers to its board of directors.