But during the former period, the CO2 concentration was about 20 % lower than during the later one, and fossil fuels consumption was about 5 times lower... This falsifies the hypothesis that CO2 is
the main driver of temperature variations.
A relatively small group of people was able both to claim that CO2 is
the main driver of temperature / climate, and to become dominant in this field.
Not exact matches
The
main drivers of El Niño conditions, ocean
temperatures in the central and eastern Pacific, were as high as 3 °C above the average, making this event one
of the three most intense El Niños on record.
But climate models predict reductions in dissolved oxygen in all oceans as average global air and sea
temperatures rise, and this may be the
main driver of what is happening there, she says.
While a strong El Niño provided a boost to global
temperatures last year, the
main driver of the planet's
temperature surge, as well as other climate trends, is the warming caused by the buildup
of greenhouse gases in the atmosphere.
This in turn reduces the
temperature difference between the Arctic and, for example, Europe, yet
temperature differences are a
main driver of air flow.
Kevin Trenbeth, a climate scientist at the National Center for Atmospheric Research in Boulder, Colo., said the study didn't account for changes in sea surface
temperatures, which are the
main drivers of changes in the position
of the rain belts (as is seen during an El Nino event, when Pacific warming pushes the subtropical jet over the Western U.S. southward).
Elevated
temperature is the
main physiological
driver of mass coral bleaching events, but increasing evidence suggests that other stressors, including elevated dissolved inorganic nitrogen (DIN), may exacerbate the negative effects
of thermal stress.
Here we analyze a series
of climate model experiments along with observational data to show that the recent warming trend in Atlantic sea surface
temperature and the corresponding trans - basin displacements
of the
main atmospheric pressure centers were key
drivers of the observed Walker circulation intensification, eastern Pacific cooling, North American rainfall trends and western Pacific sea - level rise.
While Spencer hypothesizes that the changes in cloud cover are the
main driver behind global warming, Dessler concludes that they're only responsible for a small percentage
of the changes in surface
temperature from 2000 to 2010.
This matters because the north / south
temperature difference is one
of the
main drivers of the jet stream.
The
main dynamical
driver of the monsoon is therefore the positive moisture - advection feedback (Fig. 1 A): The release
of latent heat from precipitation over land adds to the
temperature difference between land and ocean, thus driving stronger winds from ocean to land and increasing in this way landward advection
of moisture, which leads to enhanced precipitation and associated release
of latent heat.
Two Russian physicists, Victor Gorshkov and Anastassia Makarieva, claim that forests, not
temperature, are the
main drivers of winds.
However, while Spencer hypothesizes that the changes in cloud cover are the
main driver behind global warming, Dessler concludes that they're only responsible for a small percentage
of the changes in surface
temperature from 2000 to 2010.
He notes that only 64 % agreed that man - made CO2 was the
main or dominant
driver controlling more than half
of the
temperature rise.
The statement in Jo's article said: ``... only 64 % agreed that man - made CO2 was the
main or dominant
driver controlling more than half
of the
temperature rise.
Were the sun the
main driver of global
temperatures, the planet would have cooled slightly over the past 50 years.
When it first came out, it was compelling evidence that CO2 was not only a major
driver of temperature, it may be the
main driver.
As the energy transfer is a combination
of Joule heating and particle precipitations then the
main drivers of the ionospheric response to recurrent geomagnetic activity are related to changes in the
temperature, thermospheric neutral composition, and neutral winds.
Knight et al are not proposing an alternative to the
main drivers of global
temperature.
He stressed that this was a correlation, not a time series, and came to the conclusion that
temperature is likely to be the
main driver of CO2 and not the other way around.
We do not know enough to determine under what circumstance CO2 is a forcing or a feedback relative to
temperature sometimes it maybe both sometimes over large areas it may even be a coolant e.g. if you think it is the
main driver (which I don't) you would have to say it acted as a coolant for several thousand years from the Holocene climate optimum to the LIA — see Fig 6 in the last post at http://climatesense-norpag.blogspot.com I quoted the end Permian Siberian traps as a possible example
of CO2 as a forcing but even here CO2 was rising rapidly before the volcanic event.
If the trend is removed then connection between global
temperature and sea ice vanishes (more or less - IIRC) because interannual weather factors are the
main driver of short term changes.
Such oscillations might also alter hurricane patterns, but the
main driver of hurricanes is warm sea surface
temperatures > 27C (we can all agree on that, I hope); atmospheric conditions also need to be conducive (see the above comment on this year's rip - snorting season).
You blather - on yet your silly assertion that SLR somehow is incompatible with the influence
of CO2 forcing on climate and your denial that CO2 is the
main driver of recent
temperature rise (including the +0.3 ºC rise in global average
temperature over the last 15 years that you are apparently in denial over): your blather is still at the stage
of «Look!
The IPCC has chosen 1950 as the starting point for their confabulations, because they have the preconceived notion that human GHG emissions (mainly CO2) are the
main drivers of the global
temperature (the CAGW enthusiasts prefer the post - satellite era because it renders a trend
of about 0.16 °C / decade, even though they invariably select one
of the terrestrial records, usually GISTEMP).
It is the net impact
of multiple ocean surface
temperature changes, rather than a single ocean basin change, that plays a
main driver for the multi-decadal global warming accelerations and slowdowns.