For a long time now climatologists have been tracking the global
average air temperature as a measure of planetary climate variability and trends, even though this metric reflects just a tiny fraction of Earth's net energy or heat content.
Not exact matches
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.
On
average, a penguin's body surface
temperature dropped
as low
as -23 °C, about 3 ° below
air temperature.
For example, westerly wind and
air temperature can cause a 7 - ounce change in
average chick weights,
as compared to 3.5 - ounce change caused by wind speed and precipitation.
The Fourth Assessment Report finds that «Warming of the climate system is unequivocal,
as is now evident from observations of increases in global
average air and ocean
temperatures, widespread melting of snow and ice, and rising mean sea level.
A b eautiful and expansive open -
air plaza, lawn and garden offer a respite from convention business
as well
as an outdoor meeting venue under the stars, taking advantage of Riverside's
average temperature of 76 degrees (confirm our
average temperature).
As far as this historic period is concerned, the reconstruction of past temperatures based on deep boreholes in deep permafrost is one of the best past temperature proxies we have (for the global regions with permafrost — polar regions and mountainous regions)-- as a signal of average temperatures it's even more accurate than historic direct measurements of the air temperature, since the earth's upper crust acts as a near perfect conservator of past temperatures — given that no water circulation takes place, which is precisely the case in permafrost where by definition the water is froze
As far
as this historic period is concerned, the reconstruction of past temperatures based on deep boreholes in deep permafrost is one of the best past temperature proxies we have (for the global regions with permafrost — polar regions and mountainous regions)-- as a signal of average temperatures it's even more accurate than historic direct measurements of the air temperature, since the earth's upper crust acts as a near perfect conservator of past temperatures — given that no water circulation takes place, which is precisely the case in permafrost where by definition the water is froze
as this historic period is concerned, the reconstruction of past
temperatures based on deep boreholes in deep permafrost is one of the best past
temperature proxies we have (for the global regions with permafrost — polar regions and mountainous regions)--
as a signal of average temperatures it's even more accurate than historic direct measurements of the air temperature, since the earth's upper crust acts as a near perfect conservator of past temperatures — given that no water circulation takes place, which is precisely the case in permafrost where by definition the water is froze
as a signal of
average temperatures it's even more accurate than historic direct measurements of the
air temperature, since the earth's upper crust acts
as a near perfect conservator of past temperatures — given that no water circulation takes place, which is precisely the case in permafrost where by definition the water is froze
as a near perfect conservator of past
temperatures — given that no water circulation takes place, which is precisely the case in permafrost where by definition the water is frozen.
I would suggest comparing peak to peak
average temperature captures during weighted El - Nino events (during the time they occur, if they can be compared equally this would be a telling graph), instead of considering year to year records
as a means of reducing ENSO effects on the
temperature record, ENSO being largely a heat exchange between
air and sea causing great changes in cloud distribution world wide.
However their predictions are about much more than just the
average near - surface
air temperature, they are mainly focused on how heat mixes into the ocean and how that affects the rise in surface
temperature as CO2 is doubled over 100 years.
I think it's a mistake to refer to changes in global
average surface
air temperatures as if they were definitive measures of the change to the climate system.
Warming of the climate system is unequivocal,
as is now evident from observations of increases in global
average air and ocean
temperatures, widespread melting of snow and ice, and rising global
average sea level.
At some heights
average air temperatures have been dropping
as much
as a full 10 degrees Celsius, that's 18 degrees Farenheit, every decade.
Partail statement: «The
average global
air temperature changes
as concentrations of CO2 in the atmosphere vary.»
As LST closely tracks
air temperatures over the instrumental period, we can also infer that
air temperatures in this region of East Africa varied in concert with the global
average and thus were controlled primarily by the major forcings influencing
temperatures over this timescale, both natural (solar radiation, volcanism) and anthropogenic (greenhouse - gas emissions; refs 19, 20).
Springtime cold
air outbreaks (at least two consecutive days during which the daily
average surface
air temperature is below 95 % of the simulated
average wintertime surface
air temperature) are projected to continue to occur throughout this century.19
As a result, increased productivity of some crops due to higher temperatures, longer growing seasons, and elevated CO2 concentrations could be offset by increased freeze damage.20 Heat waves during pollination of field crops such as corn and soybean also reduce yields (Figure 18.3).4 Wetter springs may reduce crop yields and profits, 21 especially if growers are forced to switch to late - planted, shorter - season varietie
As a result, increased productivity of some crops due to higher
temperatures, longer growing seasons, and elevated CO2 concentrations could be offset by increased freeze damage.20 Heat waves during pollination of field crops such
as corn and soybean also reduce yields (Figure 18.3).4 Wetter springs may reduce crop yields and profits, 21 especially if growers are forced to switch to late - planted, shorter - season varietie
as corn and soybean also reduce yields (Figure 18.3).4 Wetter springs may reduce crop yields and profits, 21 especially if growers are forced to switch to late - planted, shorter - season varieties.
As the Earth warms and sea level rises, it is inundated with seawater, which is 12 - 15 degrees warmer than the
average air temperature.
What you should say is that GLOBAL
AVERAGE index of temperatures is increasing, or average low troposphere temperature is increasing (a 5 km layer of air, as per satellite interpretation of «brightness temperatures&r
AVERAGE index of
temperatures is increasing, or
average low troposphere temperature is increasing (a 5 km layer of air, as per satellite interpretation of «brightness temperatures&r
average low troposphere
temperature is increasing (a 5 km layer of
air,
as per satellite interpretation of «brightness
temperatures»).
Well now, that is something you should take up with Webster, I just know that more efficient mixing increases the
average temperature of the oceans which is increasing the total heat in the ocean system which has about 1000 times the heat capacity of the
air that that heat would be lost to if the mixing didn't take place
as efficiently.
Another problem,
as has been mentioned before, is that about 98 % of anthropogenic CO2 should be absorbed by the oceans in order to preserve the 1:50 partitioning ratio of CO2 between
air and water at earth's
average surface
temperature that is governed by Henry's law.
It's clear that weather stations on land show
average air temperatures are rising, and
as a result, the frequency and severity of droughts and heat waves are increasing.
Average air temperature over the land and sea surface was 0.56 degrees Celsius above the long - term average, tied with 2010 as the joint warmest year on
Average air temperature over the land and sea surface was 0.56 degrees Celsius above the long - term
average, tied with 2010 as the joint warmest year on
average, tied with 2010
as the joint warmest year on record.
The Fourth Assessment Report finds that «Warming of the climate system is unequivocal,
as is now evident from observations of increases in global
average air and ocean
temperatures, widespread melting of snow and ice, and rising mean sea level.
One study estimates that there are likely to be places on Earth where unprotected humans without cooling mechanisms, such
as air conditioning, would die in less than six hours if global
average surface
temperature rises by about 12.6 ° F (7 ° C).16 With warming of 19.8 - 21.6 ° F (11 - 12 ° C), this same study projects that regions where approximately half of the world's people now live could become intolerable.7
This latitude by height cross section shows that for the Arctic
as a whole,
air temperatures were above
average not just at and near the surface but through a deep layer of the atmosphere.
He asserts that
temperature is related to kinetic energy only, and that kinetic energy on
average «decreases» per molecule
as one ascends the
air column.
By contrast,
air temperatures over the Antarctic region for the same period were above
average in some areas, such
as the Antarctic Peninsula and near the pole, but below
average in others.
Air temperatures at the 925 hPa level (approximately 2,500 feet above sea level) were more than 3 degrees Celsius (5 degrees Fahrenheit) above the 1981 to 2010
average over the central Arctic Ocean and northern Barents Sea, and
as much
as 5 degrees Celsius (9 degrees Fahrenheit) above
average over the Chukchi Sea.
Generally, for climate purpose, the Earth's
temperature is regarded
as the
average temperature of the
air at any given moment and much scientific effort has been put into ascertaining what it is and how the real world arrives at that
temperature for the
air.
Whatever the
average regional
temperature, it's hotter in the cities, because concentrations of traffic, business, heating, cooking, lighting and
air conditioning generate what has become known
as the urban heat island effect: what makes this worse is that the asphalt, tarmacadam, stone, brick, glass and tile of which cities are made absorb radiation but prevent ground evaporation
as a natural cooling device.
The 2007 IPCC report warned: «Warming of the climate system is unequivocal
as is now evident from increases in global
average air and ocean
temperatures.»
What the report says about climate change and the Arctic: Over the past 50 years, near - surface
air temperatures across Alaska and the Arctic have increased at a rate more than twice
as fast
as the global
average.
It is your icons in the «climate science consensus» community that pushed supposedly global surface
air temperatures (occasionally combined with supposedly global sea surface temps)
as «Global
Average Temperature.»
Over the past 60 years, Alaska has warmed more than twice
as rapidly
as the rest of the United States, with state - wide
average annual
air temperature increasing by 3 °F and
average winter
temperature by 6 °F, with substantial year - to - year and regional variability.1 Most of the warming occurred around 1976 during a shift in a long - lived climate pattern (the Pacific Decadal Oscillation [PDO]-RRB- from a cooler pattern to a warmer one.
Unfortunately using global
average surface
air temperatures as a measure of total warming ignores the fact that most of the heat (more than 93 %) goes into our oceans, which continue to warm without any sign of a pause,
as you can see below.
the composite or generally prevailing WEATHER CONDITIONS of a region,
as temperature,
air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year,
averaged over a series of years.
JM: The guide at the said link clearly states on page 540 (Part 2, Section 1.3.2.4) that atmospheric
air temperature be reported
as 1 to 10 minute
averages.
6) «That atmospheric pressure,
air temperature,
air humidity, sea - surface
temperature, visibility, among others, be reported
as 1 to 10 min
averages, which are obtained after linearization of the sensor output;»
Armchair detectives might call it the case of Earth's missing heat: Why have
average global surface
air temperatures remained essentially steady since 2000, even
as greenhouse gases have continued to accumulate in the atmosphere?
In the 21st century, greenhouse gases have continued to accumulate in the atmosphere, just
as they did in the 20th century, but global
average surface
air temperatures have stopped rising in tandem with the gases.
The north pole gets no sunlight until March, but an influx of warm
air has pushed
temperatures in Siberia up by
as much
as 35C above historical
averages this month.
Arctic near - surface
air temperature has risen twice
as fast
as average global warming over the last 2 decades.
But the «mean» of kriged, adjusted anomalies of a small portion of the surface
air (and rarely sea surface) of the globe are referred to in all the scare propaganda
as «Global
Average Temperature.»
Solar ponds can be more than 60 C warmer beneath the water
as compared at the surface or
average air temperature.
However, for changes over time, only anomalies,
as departures from a climatology, are used, most commonly based on the area - weighted global
average of the sea surface
temperature anomaly and land surface
air temperature anomaly.
A patent granted to him and Chichilnisky in 2008 described
air capture technology
as, among other things, «a global thermostat for controlling
average temperature of a planet's atmosphere.»
Specifically, the term is defined
as how much the
average global surface
temperature will increase if there is a doubling of greenhouse gases (expressed
as carbon dioxide equivalents) in the
air, once the planet has had a chance to settle into a new equilibrium after the increase occurs.
tree rings
as proxies of surface
air temp
as proxies of global climate heat content; or temp anomalies
as proxies of
average temperatures as proxies of global climate heat content), might sound good on paper to those who think they already know the truth.
As Media Matters has noted, the IPCC's 2007 «Synthesis Report» concluded that» [w] arming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice and rising global average sea level» and that» [m] ost of the observed increase in global average temperatures since the mid-20th century is very likely [defined in the report as a» > 90 %» probability] due to the observed increase in anthropogenic [human - caused] GHG [greenhouse gas] concentrations.&raqu
As Media Matters has noted, the IPCC's 2007 «Synthesis Report» concluded that» [w] arming of the climate system is unequivocal,
as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice and rising global average sea level» and that» [m] ost of the observed increase in global average temperatures since the mid-20th century is very likely [defined in the report as a» > 90 %» probability] due to the observed increase in anthropogenic [human - caused] GHG [greenhouse gas] concentrations.&raqu
as is now evident from observations of increases in global
average air and ocean
temperatures, widespread melting of snow and ice and rising global
average sea level» and that» [m] ost of the observed increase in global
average temperatures since the mid-20th century is very likely [defined in the report
as a» > 90 %» probability] due to the observed increase in anthropogenic [human - caused] GHG [greenhouse gas] concentrations.&raqu
as a» > 90 %» probability] due to the observed increase in anthropogenic [human - caused] GHG [greenhouse gas] concentrations.»
Burning fossil fuels not only pollutes our
air directly with irritants like particulate matter and soot, but
as greenhouse gases accumulate in the atmosphere and
average temperatures rise, they also contribute to higher levels of ground - level ozone that can cause acute and long - term respiratory problems.
At all depths down to 1.0 metres the annual
average soil
temperature for the South Island has essentially the same interannual variation
as the annual mean surface (2 m)
air temperature for the South Island.