The truth is that the radiative temperature of the Earth is measured from space IS -18 C. And it is true that the average
air temperature near the surface of the earth is 15C.
The effective average location of outgoing radiation is about 5 km, so the lapse rate times 5 km = -33 C. Note that the higher ground and thus
air temperature near the ground then cause the higher radiation levels.
Side comment: At line 191 quote from Aseada et al. (1996) «most of the infrared radiation from the ground was absorbed within 200 m of the lower atmosphere, affecting
air temperature near the ground ``.
Global average
air temperature near the surface is dominated by the ocean (because it covers two thirds of the planet), particularly at low latitudes.
We have estimated that
air temperature near the surface, globally averaged, was 3 - 4 degrees C. (5 - 7 degrees F.) cooler than today.
Global warming, the phenomenon of increasing average
air temperatures near the surface of Earth over...
It is true, however, that most heavy snowfalls occur with relatively warm
air temperatures near the ground — typically 15 °F or warmer since air can hold more water vapor at warmer temperatures.»
We also know that there is a lag of a couple of months between the longest day of the year and the peak in surface
air temperatures near coasts.
Air temperatures near the Antarctic sea ice edge were near average.
Our study determined that the GCM likely underestimates future
air temperatures near the ground because it simulates too many rainy days on which clouds block sunlight and on which the wet ground is additionally cooled by evaporation (Figure 2).
Not exact matches
Enter your city or zip code to get your local
temperature and
air quality and find local green food and recycling resources
near you.
Keep the
temperature in your baby's room comfortable and do not place her
near air - conditioning or heating vents, open windows, or other sources of drafts.
The map below shows the observed change in global
near - surface
air temperature since 1900.
Just outside Washington, D.C., three Metro cars derailed earlier this month
near the West Hyattsville station when
air temperatures spiked above 95 degrees Fahrenheit, causing a «heat kink» in which the tracks got so hot they buckled.
The ocean surface is typically
near freezing because it's constantly exposed to subzero
air temperatures.
According to the historical
temperature record of the last century, the Earth's
near - surface
air temperature has risen around 0.74 ± 0.18 °C elsius (1.3 ± 0.32 °F ahrenheit).
I found problems with the data including: ««⠉ NOAA buoys measuring
near - to - sea - surface
air temperature — e.g. inadequate shielding of direct solar heating ««⠉ ship - based sea surface
temperature — e.g. variable points in cooling systems for diesel versus steam ship propulsion
Pitman, A.J., B.J. McAvaney, N. Bagnoud, and B. Cheminat, 2004: Are inter-model differences in AMIP - II
near surface
air temperature means and extremes explained by land surface energy balance complexity?
For example, the global - mean
near - surface
air temperature was more than 1 K lower than in the experiment assuming spherical snow grains.
As a hurricane, Sandy had a warm core, meaning that
temperatures near the storm's center were warmer than the surrounding
air, but colder
air eventually worked its way into the center of the storm.
«Those minimum nighttime
temperatures reflect only the
temperature of a shallow layer of
air near the surface and not
temperatures in the deep layer of the atmosphere.»
This means the
air temperature in the
near infrared lamp sauna can remain much cooler, allowing you to stay in much longer, increasing benefits.
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Air conditioning was
near flawless which is good when southern Spain's summer
temperature approaches your body
temperature.
If the
air in the car is
near or above the dog's body
temperature (about 100 °F), the dog will be unable to cool itself, and its body
temperature can quickly rise to fatal levels (over 107 °F).
The microbes can thrive despite
near - freezing
temperatures and very low - oxygen
air.
On Tuesday night, for instance, the chill from Wall Street insinuated itself into the very
air over New York, dropping the
temperature near zero and turning the city into a ghost town everywhere but Chelsea, where crowds so recently accustomed to lavish parties and lava flows of spirits banded together for a week of less - is - more gatherings around, if not in, the Armory Show.
Alternatively, I might ask whether GCMs predict different sensitivities (e.g., to El Nino years) for
near - surface
air temperatures versus surface water
temperatures.
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 frozen.
(1) In addition to the data of the
near - surface
temperatures, which are composed of measurements from weather stations and sea surface
temperatures, there is also the microwave data from satellites, which can be used to estimate
air temperatures in the troposphere in a few kilometers altitude.
As we have only recently observed the phenomena and had previously expected something along these lines
near the middle of this century, it would seem that «how much» and how this is a function of variable including but not limited to
temperature and
air speed will be a matter for further investigation.
And no, there is no huge plunge in tropical or global surface
air temperatures when the ocean circulation spins up because there is a
near - compensating decrease in poleward heat transport via the atmospheric circulation.
My guess on why was shown at RC a few weeks ago in comment # 12... Wayne, if it's true as you indicated in 9, that upper
air temperatures are increasing at a much stronger rate than
near the surface, it seems to me the departure would explain at least part of what seems to be a large increase in world area having minimal rainfall and drought... at: http://www.realclimate.org/index.php/archives/2006/07/peter-doran-and-how-misleading-talking-points-propagate/
Radiative equilibrium at small LW optical thickness occurs when the whole atmosphere has a
temperature such that the Planck function is about half of that of the surface (a skin
temperature), whereas at larger LW optical thicknesses, the equilibrium profile has a signficant drop in the Planck function through the atmosphere, approaching half the OLR value at TOA and approaching the surface value towards the surface — of course, convection
near the surface will bring a closer match between surface and surface -
air temperatures.
Maximum incoming solar heating occurs there but the greatest
temperatures are
near 50 km where the low density
air requires very little energy to raise its
temperature (think KE = 1/2 mv ^ 2 and fewer collisions with fewer
air molecules yield greater v).
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.
While 2009 showed a slowdown in the rate of annual
air temperature increases in the Arctic, the first half of 2010 shows a
near record pace with monthly anomalies of over 4 °C in northern Canada.
An apparent lag in
temperature seen in the Greenland ice cores might be an artifact of the proximity of the large Laurentide Ice Sheet, which would have limited the
near surface
air temperature to the freezing point, as happens over summer sea - ice now.
Based on the results of the causality tests, the author concludes that it is global
near - surface
air temperature that influences sea surface
temperature, and not the other way around — which supports the global warming - induced increase in hurricane intensity.
Here, the author draws causality relationships between global mean
near - surface
air temperatures and Atlantic sea surface
temperatures and hurricane power dissipation indexes using statistical causality tests.
Increasing the
temperature of the
air near the surface by one degree will cause convection.
However, despite
near normal rates of ice loss during the month, June 2015 was a relatively warm month (Figure 7) with 925 hPa
air temperatures up to 2.5 C higher than average
near the North Pole and East Siberian Sea, with even warmer
air temperatures in the Kara Sea (up to 4.5 C).
The forecast suggests reductions in ice extent along the Eurasian coast, but cooler
near - surface
air temperatures over the Canadian Archipelago.
However, there was one post yesterday featuring a photo of a weather station positioned
near an
air - conditioner along with the data series from that particular station showing a jump in
temperature.
Convection is based on the VERY
near surface
temperature whereas SB is based on the
temperature of the larger
air mass in radiative exchange with the surface.
As a former pilot, I can testify to its effects, and even in fairly benign weather there can be «interesting» changes in wind speed, direction &
temperature, particularly
near the coast, when cool sea breezes can push warm
air from the land upwards.
Many retreats began with an increase in thinning rates
near the front in the summer of 2003, a year of record high coastal -
air and sea - surface
temperatures.
This spatial pattern is consistent with the
air temperature — North Atlantic Oscillation (NAO) index correlation pattern, with maximum correlation in the
near - Atlantic region, which decays toward the North Pacific.