(3) «Factcheck: Mail on Sunday's «astonishing evidence»
about global temperature rise» by Zeke Hausfather of Berkley Earth, posted at Carbon Brief.
Not exact matches
But they've been especially interested in the most recent period of abrupt
global warming, the Bølling - Allerød, which occurred
about 14,500 years ago when average
temperatures in Greenland
rose about 15 degrees Celsius in
about 3,000 years.
This may have helped offset greenhouse warming from
about 1940 to 1980, when
global temperatures rose little before
rising steeply.
To have any chance of limiting the
global temperature rise to 2 °C, we have to limit future emissions to
about 500 gigatonnes of CO2.
The discoveries of these proteins and genes have the potential to address a wide range of critical agricultural problems in the future, including the limited availability of water for crops, the need to increase water use efficiency in lawns as well as crops and concerns among farmers
about the impact heat stress will have in their crops as
global temperatures and CO2 levels continue to
rise.
But here's your question: why we should be concerned even with the
global temperature rise that has been predicted, let's say by 2050, of probably around 2 degrees C; one should understand that in the Ice Age — the depths of the Ice Age — the Earth was colder on a
global average by
about 5 degrees C.
As
global temperature rises, most of the extra heat in the atmosphere —
about 90 percent — sinks into the ocean.
The deceleration in
rising temperatures during this 15 - year period is sometimes referred to as a «pause» or «hiatus» in
global warming, and has raised questions
about why the rate of surface warming on Earth has been markedly slower than in previous decades.
Frustrated by failure to agree a broad international deal to limit
global warming,
about 30 nations have joined the U.S. initiative to limit short - lived air pollutants as a new way to curb
temperature rises, protect health and aid crop growth.
Under control runs without any pollution controls, the
global temperature rose by 2.5 ˚C — plus or minus
about 0.7 ˚C — by 2070.
The more scientists understand
about how insects respond to and sense heat, the better they can understand insect migration in response to
rising global temperatures and the spread of disease through insect bites.
But the emissions slash will not stem the tide:
Global average
temperatures would still
rise by nearly 1º F,
about what scientists attribute to date from industrial emissions since 1900.
Scientists have discovered that
rising ocean
temperatures slow the development of baby fish around the equator, raising concerns
about the impact of
global warming on fish and fisheries in the tropics.
Vague comments
about Keystone Addressing the threat of
rising global temperatures would be a central part of his efforts, Kerry said, arguing that foreign policy is «not defined by drones and deployments alone» but also by humanitarian aid, fighting disease and promoting freedom.
Since the industrial revolution,
global temperatures have
risen by
about 1 °C, which has had an impact at even the largest scales.
Global sea levels
rose at a rate of
about 3.5 millimeters annually in the 1990s, a dynamic largely attributed to
rising temperatures.
The public, press and policy makers have been repeatedly told that three claims have widespread scientific support:
Global temperature has
risen about a degree since the late 19th century; levels of CO2 in the atmosphere have increased by
about 30 % over the same period; and CO2 should contribute to future warming.
As Arctic
temperatures rise at
about double the rate of the planet as a whole, Greenland's surface has been melting at a steady clip, contributing
about 30 percent of the foot of
global sea level
rise since 1900.
The public, press and policy makers have been repeatedly told that three claims have widespread scientific support:
Global temperature has
risen about a degree since the late 19th century; levels of CO2 [carbon dioxide] in the atmosphere have increased by
about 30 percent over the same period; and CO2 should contribute to future warming.
The standardized viewpoint
about global warming accepts that the
temperature worldwide is indeed
rising.
A student named Kelsea wrote her individual play
about global warming; the story is told through newscasts
about rising temperatures.
Although uncertainty exists
about exactly how the earth's climate responds to these gases,
global temperatures are
rising.
The surface
temperature increase that partially gave
rise to concerns
about global warming coincided with a move to tethered electronic measuring devices (um, I think that means thermometers) that forced the movement of many stations closer to buildings and developed areas, causing warming that may not have been corrected for.
Those extremes will come
about more slowly than the
rise of mean
temperature, but I have seen zero models that suggests a continued
rise of
global average with no
rise of
global high.
While the Arctic, as a whole, as
risen at
about twice the
global rate, Antarctica, overall, has shown no significant
temperature change.
Would the steady
rise after 1000AD imply that the
global average
temperature may have been at a fairly stable «high» until
about 1400, rather than dropping off after a short medieval peak?
What initiated the
global temperature rise about 20 kya?
While
global temperatures rose by
about one - fifth of a degree Fahrenheit per decade from the 1950s through 1990s, warming slowed to just half that rate after the record hot year of 1998.
Its a fact that mean
global temperature has
risen no more than
about 0.5 degC in the past 27 yrs — as you know, almost identical to the
rise between 1910 and 1945, when CO2 emissions are accepted to have been two small to influence, and there's certainly no indication of it «accelerating».
«After
rising rapidly during the first part of the 20th century,
global average
temperatures did cool by
about 0.2 °C after 1940 and remained low until 1970, after which they began to climb rapidly again.
Yet, as this two - panel graphic shows (see HERE — usually two clicks to «download your attachment»), the CO2
rises (they lag
global temperature rises by
about 10 months) are associated with a net CO2
rise far less than 13ppm.
Specifically on the issue of
global warming from greenhouse gases and climate change, the conference reached a consensus on the likelihood of a
rise in the
global mean
temperature of between 2.7 - 8 degrees F (1.5 - 4.5 degrees C) by
about 2050, but not on whether such warming has begun.
RE 78: «Its a fact that mean
global temperature has
risen no more than
about 0.5 degC in the past 27 yrs — as you know, almost identical to the
rise between 1910 and 1945, when CO2 emissions are accepted to have been two small to influence, and there's certainly no indication of it «accelerating».»
According to data from the World Health Organization,
rising temperatures on the planet are killing off the equivalent of a mid-sized city every year;
about 150,000 annual deaths can be attributed to
global warming, from causes including heat waves, air pollution, infectious disease, food safety and production, flooding and more.
Seems to me the debate
about AGHG
global warming and increasing TC frequency / intensity / duration boils down to the fact that as sea surface
temperatures, as well as deeper water
temperatures rise, the wallop of any TC over warmer seas without mitigating circumstances like wind sheer and dry air off land masses entrained in the cyclone will likely be much more devastating.
Subject of some specific concern
about global warming because of large
temperature rises predicted for the arctic, and because of some arctic - specific feedback effects (e.g. the albedo feedback following loss of arctic sea ice).
If observations do not support code predictions — like more extreme weather, or rapidly
rising global temperatures — Feynman has told us what conclusions to draw
about the theory.»
They have already prevented
global temperature from
rising for
about 18 years.
These emissions have raised
global temperatures by
about 0.8 degrees Celsius (1.4 degrees Fahrenheit) since the Industrial Revolutions leading to melting glaciers, sea level
rise, vanishing Arctic sea ice, species migrations, and increases in extreme weather such as droughts and floods.
Climate alarm depends on several gloomy assumptions —
about how fast emissions will increase, how fast atmospheric concentrations will
rise, how much
global temperatures will
rise, how warming will affect ice sheet dynamics and sea - level
rise, how warming will affect weather patterns, how the latter will affect agriculture and other economic activities, and how all climate change impacts will affect public health and welfare.
Nature of Cumulus Convection The AGW theory and the many AGW
global model simulations assume that tropospheric relative humidity (RH) will remain quasi-constant as CO2 induced blockage of infrared (IR) radiation brings
about temperature rises.
«To summarize - Using the 60 and 1000 year quasi repetitive patterns in conjunction with the solar data leads straightforwardly to the following reasonable predictions for
Global SSTs 1 Continued modest cooling until a more significant
temperature drop at about 2016 - 17 2 Possible unusual cold snap 2021 - 22 3 Built in cooling trend until at least 2024 4 Temperature Hadsst3 moving average anomaly 2035 — 0.15 5Temperature Hadsst3 moving average anomaly 2100 — 0.5 6 General Conclusion — by 2100 all the 20th century temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the litt
temperature drop at
about 2016 - 17 2 Possible unusual cold snap 2021 - 22 3 Built in cooling trend until at least 2024 4
Temperature Hadsst3 moving average anomaly 2035 — 0.15 5Temperature Hadsst3 moving average anomaly 2100 — 0.5 6 General Conclusion — by 2100 all the 20th century temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the litt
Temperature Hadsst3 moving average anomaly 2035 — 0.15 5
Temperature Hadsst3 moving average anomaly 2100 — 0.5 6 General Conclusion — by 2100 all the 20th century temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the litt
Temperature Hadsst3 moving average anomaly 2100 — 0.5 6 General Conclusion — by 2100 all the 20th century
temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the litt
temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the little ice age.
It's clear that Smith doesn't understand, willfully or otherwise, even the most basic ideas
about global warming; he still claims
global temperatures haven't
risen since 1998, for example, sticking to a «pause» in warming that we know, and have known for some time, doesn't exist.
Scientific information with fact sheets
about everything from sea level
rise to
global temperature records.
Third, in the absence of any feedbacks except for
temperature itself, doubling carbon dioxide would increase the
global average surface
temperature by
about 1.8 F. And fourth,
global temperatures have been
rising for roughly the past century and have so far increased by
about 1.4 F.
Looking at the
global temperatures as used by the US National Oceanic and Atmospheric Administration, the UK's Met Office and the IPCC (and indeed Al Gore) it's apparent that there has been a sharp
rise since
about 1980.
Scientists already knew that average
global temperatures had
risen about one degree Fahrenheit since 1900.
If
global temperatures rise 1.5 degrees Celsius over the next century, the rate will be
about 10 times faster than what's been seen before, said Christopher Field, one of the scientists on the study.
On a longer time scale,
global average surface
temperatures have
risen at a rate of
about 0.70 °C per century.
Marcott paper Basically the folks at RC have probably made poor ol Marcott respond that the uptick did not matter anyway its not important, significant, robust etc don't rely on it just forget
about it please etc but unfortunately for them as Ross MC on Realclimate reply, at CA says «But that is precisely what they do in Figure 3 of their paper, and it is the basis of their claim that «
Global temperature, therefore, has
risen from near the coldest to the warmest levels of the Holocene within the past century, reversing the long - term cooling trend that began ~ 5000 yr B.P.» Without the uptick in their proxy reconstruction this kind of statement could never have been made.