CO2 is having the largest effect on
the recent increases in global temperature.
Most scientists agree that humans have something to do with
recent increases in global temperature, therefore we inevitably have to accept the politics of restraint.
The NSF investigation was the latest in a series of inquiries to find no evidence for allegations by critics, ATI among them, that Mann had falsified data or skewed calculations to exaggerate
recent increases in global temperatures or humanity's role in causing them.
Presumably NPR thinks there is data which shows that carbon dioxide is primarily responsible for
recent increases in global temperatures.
Third, we know it is carbon — not natural forces like the sun — that's responsible for
the recent increase in global temperatures.
I'm well aware that a correlation of 0.85 for CO2 to temperature doesn't necessarily prove causation, but conversely the lack of correlation, -0.05, of SSN with temperatures is a strong argument against the influence of sunspots on
the recent increase in global temperatures.
Not exact matches
A
recent report by two leading nonprofits, the Rocky Mountain Climate Organization and the Natural Resources Defense Council, details how the 11 U.S. western states together have experienced an
increase in average
temperature during the last five years some 70 percent greater than the
global average rise.
Results of a new study by researchers at the Northeast Climate Science Center (NECSC) at the University of Massachusetts Amherst suggest that
temperatures across the northeastern United States will
increase much faster than the
global average, so that the 2 - degrees Celsius warming target adopted
in the
recent Paris Agreement on climate change will be reached about 20 years earlier for this part of the U.S. compared to the world as a whole.
The findings show a slight but notable
increase in that average
temperature, putting a dent
in the idea that
global warming has slowed over the past 15 years, a trend highlighted
in the most
recent Intergovernmental Panel on Climate Change report.
The
recent slowdown
in global temperature increase is consistent with internal Pacific and Atlantic multidecadal variability.
Yet how can a barely discernible, one - degree
increase in the recorded
global mean
temperature since the late 19th century possibly gain public acceptance as the source of
recent weather catastrophes?
This means that if the GCR - warming hypothesis is correct, this
increase in GCRs should actually be causing
global cooling over the past five decades, and particularly cold
temperatures in recent years.
The last couple of years have witnessed a cooling phase for Europe and parts of North America despite the
recent overall
increase in global temperatures.
Global mean
temperatures averaged over land and ocean surfaces, from three different estimates, each of which has been independently adjusted for various homogeneity issues, are consistent within uncertainty estimates over the period 1901 to 2005 and show similar rates of
increase in recent decades.
According to
recent research, a 3 °C (5.4 °F)
increase in the
global temperature could
increase that ratio to 7 - to - 1, or perhaps as much as 23 - to - 1.
If greenhouse gases were responsible for
global temperature increases in recent decades, atmospheric physics require that higher levels of our atmosphere would show greater warming than lower levels.
BC17 derive a relationship
in current generation (CMIP5)
global climate models between predictors consisting of three basic aspects of each of these simulated fluxes
in the
recent past, and simulated
increases in global mean surface
temperature (GMST) under IPCC scenarios (ΔT).
If greenhouse gases were responsible for
global temperature increases in recent decades, atmospheric physics require that higher levels of our atmosphere would show greater warming than lower levels.
The most
recent report concluded both, that
global temperatures are rising, that this is caused largely by human activities and,
in addition, that for
increases in global average
temperature, there are projected to be major changes
in ecosystem structure and function with predominantly negative consequences for biodiversity and ecosystems, e.g. water and food supply.
Terrell Johnson, reporting on a
recent NASA publication concluding that deep ocean
temperatures have not
increased since 2005 (http://www.weather.com/science/environment/news/deep-ocean-hasnt-warmed-nasa-20141007): «While the report's authors say the findings do not question the overall science of climate change, it is the latest
in a series of findings that show
global warming to have slowed considerably during the 21st century, despite continued rapid growth
in human - produced greenhouse gas emissions during the same time.»
By now, everyone who pays any attention knows that CO2 is an important greenhouse gas, and that the
recent increase in global average
temperature is thought to have been largely due to humans pumping massive amounts of greenhouse gases (especially CO2) into the atmosphere.
Global temperature has
in recent years
increased more slowly than before, but this is within the normal natural variability that always exists, and also within the range of predictions by climate models — even despite some cool forcing factors such as the deep solar minimum not included
in the models.
The higher sea surface
temperatures in the tropics (~ 0.85 K / decade
in recent decades) have lead to an
increase in LW (infrared) radiation, and a loss to space of some 3 W / m2 all over the tropics (50 % of the surface), which more than halves the — theoretical —
global influence (~ 2.4 W / m2) of all extra GHGs together since the start of the industrial revolution.
This
increased overturning appears to explain much of the
recent slowdown
in the rise of
global average surface
temperatures.
«Another
recent paper used a different NOAA ocean surface
temperature data set to find that since 2003 the
global average ocean surface
temperature has been rising at a rate that is an order of magnitude smaller than the rate of
increase reported
in Karl's paper.»
Anthropogenic
global warming (AGW), a
recent warming of the Earth's lower atmosphere as evidenced by the
global mean
temperature anomaly trend [11], is BELIEVED to be the result of an «enhanced greenhouse effect» mainly due to human - produced
increased concentrations of greenhouse gases
in the atmosphere [12] and changes
in the use of land [13].
At WUWT, Willis E. tried to claim that we have already seen a 2 °C
increase in global temperature based on the trough of one of the oscillations and the
recent temperature peak.
Even as shorter trends, CO2 content
in atmosphere follow
global temperature trends and not visa versa, for instance during glasials and interglasial, including even the current interglasial Holocene, as I already
in my comment above stated concerning the
recent increase of CO2 content
in atmosphere.
In 2007 I pointed out that it was curious that in recent years the global annual average temperature had not increased at a time when greenhouse gasses were increasing rapidly and when the media was full of claims that the earth's temperature was getting higher and highe
In 2007 I pointed out that it was curious that
in recent years the global annual average temperature had not increased at a time when greenhouse gasses were increasing rapidly and when the media was full of claims that the earth's temperature was getting higher and highe
in recent years the
global annual average
temperature had not
increased at a time when greenhouse gasses were
increasing rapidly and when the media was full of claims that the earth's
temperature was getting higher and higher.
On balance the evidence shows that solar and oceanic variations are more likely the cause of
recent observations of warming
in the air than
increasing CO2
in the air but the issue can soon be resolved by observing the
global air
temperature changes that occur during and after the extended cycle 23 and the probable weak cycle 24.
«Average
global temperature increases, geographically, at a linear rate from 60 ° N or S latitude towards the equator, but levels off between the Tropics of Cancer and Capricorn,» Robert Colwell of the University of Connecticut, US, co-author of a
recent paper
in Science, told environmentalresearchweb.
3)
In my comment https://judithcurry.com/2011/08/04/carbon-cycle-questions/#comment-198992 I have explained that during recent three decades the increase of CO2 content in atmosphere is controlled by the rising temperature of global sea surfac
In my comment https://judithcurry.com/2011/08/04/carbon-cycle-questions/#comment-198992 I have explained that during
recent three decades the
increase of CO2 content
in atmosphere is controlled by the rising temperature of global sea surfac
in atmosphere is controlled by the rising
temperature of
global sea surface.
Recent work published
in Nature (15 August, 2013) shows that
global temperature variability is not
increasing, even though there are significantly changing regional patterns.
Numerous studies
in recent years have found no evidence that the number of hurricanes and their northwest Pacific Ocean cousins, typhoons, is
increasing because of the rise
in global temperatures.
[there are countless examples of unmitigated BS from the pro-AGW industry: for just two instances, take climateprediction.net's scaremongering last year on 11C
temperature increases, or Tim Flannery's
recent taxpayer - funded ads
in South Australia claiming turning off your lights will ease
global warming].
However, despite this, the team reckon to have perhaps isolated a «
global warming» signal
in the accelerated run off of the Greenland Ice Mass — but only just, because the runoff at the edges is balanced by
increasing central mass — again, they focus upon
recent trends — a net loss of about 22 cubic kilometres
in total ice mass per year which they regard as statistically not significant — to find the «signal», and a contradiction to their ealier context of air
temperature cycles.
And while the IPCC's most
recent 2007 report concluded «most of the observed
increase in global average
temperatures since the mid-20th century is very likely due to the observed
increase in anthropogenic greenhouse gas concentrations,» «Team B» came to the opposite conclusion, that «natural causes are very likely to be the dominant cause.»
To date, while various effects and feedbacks constrain the certainty placed on
recent and projected climate change (EG, albedo change, the response of water vapour, various future emissions scenarios etc), it is virtually certain that CO2
increases from human industry have reversed and will continue to reverse the downward trend
in global temperatures that should be expected
in the current phase of the Milankovitch cycle.
Fourth, a
recent study concludes that the basic alarmist hypothesis is scientifically incorrect by showing that
increases in atmospheric CO2 levels have no statistically significant effect on
global temperatures.
From the Himalayas to Alaska, glacier melting has accelerated
in recent decades as
global temperatures increased.
BC17 derive a relationship
in current generation (CMIP5)
global climate models between predictors consisting of three basic aspects of each of these simulated fluxes
in the
recent past, and simulated
increases in global mean surface
temperature (GMST) under IPCC scenarios (ΔT).
The term
global warming is now popularly used to refer to the
recent reported
increase in the mean surface
temperature of the earth; this
increase being attributed to
increasing human activity and
in particular to the
increased concentration of greenhouse gases (carbon dioxide, methane and nitrous oxide)
in the atmosphere.
The influence is clear: a pronounced
recent ENSO - induced cooling which has cancelled the continued
global warming due to man - made CO2, leading to the «hiatus»
in the
increase of
global temperature.
This is powerful evidence that the
recent slowdown
in global temperature increase is not a slowdown of «
global warming,» i.e. man - made climate change, it's simply partial cancellation of
global warming by the natural fluctuations due to ENSO.
Furthermore, with the
recent increases of late season hurricanes reaching the northeastern region of the United States, Irene
in 2011 and Sandy's
recent landfall
in New Jersey on October 29, 2012 and the record breaking
temperatures we are now seeing
in the western United States where
temperatures are reaching within a few degrees of the hottest recorded
temperature on earth, 134 degrees Fahrenheit, are more evidence that the
global climate is changing possibly due to
global warming.
The confusion resulting from skewing trends is summarized
in a
recent study that concluded their «results cast some doubts
in the use of homogenization procedures and tend to indicate that the
global temperature increase during the last century is between 0.4 °C and 0.7 °C, where these two values are the estimates derived from raw and adjusted data, respectively.»
Anthropogenic
global warming (AGW), a
recent warming of the Earth's lower atmosphere as evidenced by the
global mean
temperature anomaly trend [9], is believed to be the result of an «enhanced greenhouse effect» mainly due to human - produced
increased concentrations of greenhouse gases
in the atmosphere [10] and changes
in the use of land [11]..
The simulations also produce an average
increase of 2.0 °C
in twenty - first century
global temperature, demonstrating that
recent observational trends are not sufficient to discount predictions of substantial climate change and its significant and widespread impacts.
Yet how can a barely discernible, one - degree
increase in the recorded
global mean
temperature since the late 19th century possibly gain public acceptance as the source of
recent weather catastrophes?
As I see it, the prediction is, that if anthropogenic CO2 is a significant driver of
global warming
in recent times, and has continued to
increase, then
temperatures should have continued to
increase in the last decade or so.