The 24 hour
average air temperature at 10m was 13.8 C compared to Teff of 12.8 C.
Since 2001,
the average air temperature at Earth's surface has risen more slowly than it did in previous decades.
Not exact matches
The findings were not a total surprise, with future projections showing that even with moderate climate warming,
air temperatures over the higher altitudes increase even more than
at sea level, and that, on
average, fewer winter storm systems will impact the state.
But a controversial study suggests that trees may control the
temperature of their leaves, keeping them
at a balmy 21.4 °C on
average regardless of how cold the
air gets.
The chart below, by Zack Labe
at the University of California
at Irvine, shows how daily
average air temperatures over the Arctic (red line) have spent most of January and February substantially above
average (white line).
Average temperatures range between 20 - 27 °C
at this time of year — delightfully cooled by fresh alpine
air - making Austria the perfect place for a summer or early autumn spa escape.
The Absolutely Green in the lush high heartland of Bali
at an altitude of 1.142 meters above the sea level which surrounded by rolling mountain, crater lakes and ancient forest, the course design is meant to blend the fairways and create a dramatic backdrop for tea shots and approaches.The deep blue sky, the
air fresh, clear and the
temperature average between 14 - 20 Celsius degrees.It is rights comfortable golfing destination in Bali.It features tall trees and flowers of riotous colour separating the fairway of this 18 holes championship course.Designed by Peter Thompson, Michael Wolferidge & Associates, Bali Handara Kosaido Country Club will make you feel a part of the rich, sporty, and exotic nature.
Thus, small changes of global
average air temperature are associated with very large changes in some regions, particularly over land,
at mid - to high latitudes, in mountain regions.
Global
average air temperature near the surface is dominated by the ocean (because it covers two thirds of the planet), particularly
at low latitudes.
At some heights
average air temperatures have been dropping as much as a full 10 degrees Celsius, that's 18 degrees Farenheit, every decade.
Thus, the
average temperature of the entire column of
air should drop or
at least remain constant.
Air temperatures at the 925 hPa level were 1 to 3 degrees Celsius (2 to 5 degrees Fahrenheit) below
average for a large area stretching from the northern Kara Sea, through the Laptev Sea, and into north - central Eurasia.
The actual answer is that water has a molecular mass of 18, while dry
air has an
average molecular mass of 29, so moist
air is less dense
at the same
temperature and pressure.
Air temperatures at 925 millibar (about 3,000 ft above the surface) were mostly above
average over the Arctic Ocean, with positive anomalies of 4 to 6º Celsius over the Chukchi and Bering seas on the Pacific side of the Arctic, and over the East Greenland Sea on the Atlantic side.
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 varieties.
RIGHT NOW, you are expecting an
air mass
at an
average 289K to more rapidly warm a higher thermal mass of the oceans
at an
average temperature of 294.2 K.
Running 60 - month
averages of European
air temperature at a height of two metres over land (left - hand axis) according to different datasets: ERA - Interim (Copernicus Climate Change Service, ECMWF); GISTEMP (NASA); HadCRUT4 (Met Office Hadley Centre), NOAAGlobalTemp (NOAA); and JRA - 55 (JMA).
Running 60 - month
averages of global
air temperature at a height of two metres (left - hand axis) and estimated change from the beginning of the industrial era (right - hand axis) according to different datasets: ERA - Interim (Copernicus Climate Change Service, ECMWF); GISTEMP (NASA); HadCRUT4 (Met Office Hadley Centre), NOAAGlobalTemp (NOAA); and JRA - 55 (JMA).
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.
The resulting enhanced loss of summer and winter sea ice resulted in feedbacks, associated with Arctic Amplification, which has raised Arctic
air temperatures at a rate twice the global
average.
Internal variability can only account for ~ 0.3 °C change in
average global surface
air temperature at most over periods of several decades, and scientific studies have consistently shown that it can not account for more than a small fraction of the global warming over the past century.
The
average Arctic
air temperature at that time was 3.6 degrees (2 degrees Celsius) warmer than the 1981 - 2010
average.
After above -
average air temperatures and record ice loss in May 2010, the ice extent
at the beginning of June fell below the previous record minimum for the same day in 2006.
October
air temperatures at the 925 hPa level (about 2,500 feet above sea level) were unusually high over most of the Arctic Ocean (Figure 2c), especially over the Beaufort and Chukchi Seas and over the East Greenland Sea (up to 8 degrees Celsius or 14 degrees Fahrenheit above the 1981 to 2010
average).
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.
Eventually the
average temperature of Arctic
air will fail to be cold enough,
at this point the Arctic ocean will be open year round.
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.
Following a warming trend early in the 20th century and mid-century cooling, surface
air temperatures in the Arctic have shown a strong increase over the last few decades, warming
at about twice the global
average.
The time series uses - an area - weighted
average of the surface
air temperature over land and the
temperature of water
at the ocean's surface.
Air temperature and water surface
temperature at the interface
average within 1C of each other and conduction requires a
temperature difference to drive it.
The MITS reasons that one molecule moving
at ten times the
average speed of
air molecules
at sea level must be much hotter than
average, but this only shows a lack of appreciation for how something like
temperature becomes meaningless without an abstraction on which to base it.
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.
During the cool season, the Ridge brought long stretches of cloudless days, which caused daytime
temperatures during winter to be well above
average (and,
at the same time, the position of the ridge also prevented major cold
air outbreaks from occurring after December 2013).
In contrast, meteorological data collected from three nearby coastal stations (Brevoort Island, Cape Dyer, and Resolution Island) between 1950 and 1992 indicated that the mean minimum and maximum
air temperatures for the month of April are normally 10 - 20 °C cooler than the
averages we recorded
at our camp.
It is not «conduction» but exchange of radiation; if you keep your hands parallel
at a distance of some cm the right hand does not (radiatively) «warm» the left hand or vice versa albeit
at 33 °C skin
temperature they exchange some hundreds of W / m ² (about 500 W / m ²) The solar radiation reaching the surface (for 71 % of the surface, the oceans) is lost by evaporation (or evapotranspiration of the vegetation), plus some convection (20 W / ²) and some radiation reaching the cosmos directly through the window 8µm to 12 µm (about 20 W / m ² «global»
average); only the radiative heat flow surface to
air (absorbed by the
air) is negligible (plus or minus); the non radiative (latent heat, sensible heat) are transferred for surface to
air and compensate for a part of the heat lost to the cosmos by the upper layer of the water vapour displayed on figure 6 - C.
Subsurface ocean warming explains why global
average air temperatures have flatlined since 1999, despite greenhouse gases trapping more solar heat
at the Earth's surface.
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.
Although the
temperatures for November and December are not in yet, the WMO says the combined sea surface and land surface
air temperature for 2009 is currently estimated
at 0.44 degrees C above the 1961 - 1999
average of 14.00 degrees.
The thawing of permafrost in the region has been linked to global warming.5 Annual
average air temperatures rose 1.1 ° F (0.6 ° C) from 1960 to 2005,6,11,12 while permafrost
at a depth of 33 feet (10 meters) warmed an
average of 0.5 ° -1.3 ° F (0.3 ° -0.7 ° C).6, 12
For example, coastal stations in Greenland are cooling and
average summer
air temperatures at the summit of the Greenland Ice Sheet have decreased by 4 degrees Fahrenheit per decade since measurements began in 1987.
Global
temperatures usually are described in terms of the surface
air temperature anomaly, the deviation of the
temperature at each site from a mean of many years that is
averaged over the whole world, both land and oceans.
say it has been predicted that «the
average temperature in the semiarid northwest portion of China in 2050 will be 2.2 °C higher than it was in 2002,» and they report that based on the observed results of their study, this increase in
temperature «will lead to a significant change in the growth stages and water use of winter wheat,» such that «crop yields
at both high and low altitudes will likely increase,» by 2.6 %
at low altitudes and 6.0 %
at high altitudes... Even without the benefits of the aerial fertilization effect and the anti-transpiration effect of the ongoing rise in the
air's CO2 content, the increase in
temperature that is predicted by climate models for the year 2050, if it ever comes to pass, will likely lead to increases in winter wheat production in the northwestern part of China, not the decreases that climate alarmists routinely predict.»
Air temperature at a height of two metres for 2017, shown relative to its 1981 — 2010
average.
Solar ponds can be more than 60 C warmer beneath the water as compared
at the surface or
average air temperature.
Because the satellite data measure an
average temperature through a depth of several kilometres in the atmosphere, they would be expected to compare better with upper -
air measurements taken using weather balloons and radiosondes than they would with measurements
at the surface.
These metrics emphasise fields between 30S and 30N including 2 m
air temperature (Willmott and Matsuura 2000), vertically
averaged air temperature (ERA40, Uppala et al. 2005), latent heat fluxes of the ocean (Yu et al. 2008), zonal winds
at 300 mb (ERA40, Uppala et al. 2005), longwave and shortwave cloud forcing (CERES2, Loeb et al. 2009), precipitation over land and ocean (GPCP, Adler et al. 2003), sea level pressure (ERA40, Uppala et al. 2005), vertically
averaged relative humidity (ERA40, Uppala et al. 2005).
Greenland surface
air temperature trends, including
at the Summit site, have not shown persistent warming since 1930 in contrast to global
average surface
temperature (23).
At no point does the
average temperature of the vapor exceed the
average temperature of the water from which it sprang so the
air near the surface never gets any warmer either.
At sea level, the energy content of the evaporated water molecules will be quite high, but the
temperature of the
air will not be because most of the
air is N2 (
temperature is an
average), which isn't heated by IR radiation from the water vapor molecules.