Not exact matches
By measuring the remaining difference — the 20,000 - year old ice deep in the West Antarctic ice sheet is about 1 degree Celsius cooler
than the
surface — the scientists were able to estimate the original
temperature based on how
fast pure ice warms up.
While at single buoys the water may have warmed
faster or slower
than other locations, globally, there is a clear trend toward higher sea
surface temperatures.
The research published in Nature Communications found that in the past, when ocean
temperatures around Antarctica became more layered - with a warm layer of water below a cold
surface layer - ice sheets and glaciers melted much
faster than when the cool and warm layers mixed more easily.
The former is likely to overestimate the true global
surface air
temperature trend (since the oceans do not warm as
fast as the land), while the latter may underestimate the true trend, since the air
temperature over the ocean is predicted to rise at a slightly higher rate
than the ocean
temperature.
(1) The warm sea
surface temperatures are not just some short - term anomaly but are part of a long - term observed warming trend, in which ocean
temperatures off the US east coast are warming
faster than global average
temperatures.
«Climate Change, Sea Level, and Western Drought: Dangerous Anthropogenic Interference Learn why the American West could be in trouble with
surface air
temperatures rising
faster than elsewhere in the coterminous United States.
Scientists are currently interested in why
temperatures at the
surface of the ocean have been rising slower
than in previous decades, even though we're emitting greenhouse gases
faster than ever.
If not, and the upper troposphere warms less rapidly
than the
surface, the
temperature difference relevant for hurricane strength will increase that much
faster.
«Climate Change, Sea Level, and Western Drought: Dangerous Anthropogenic Interference Learn why the American West could be in trouble with
surface air
temperatures rising
faster than elsewhere in the coterminous United States.
The global average
surface temperature has risen between 0.6 °C and 0.7 °C since the start of the twentieth century, and the rate of increase since 1976 has been approximately three times
faster than the century - scale trend.»
Global warming does not mean no winter, it means winter start later, summer hotter, as Gary Peters said «The global average
surface temperature has risen between 0.6 °C and 0.7 °C since the start of the twentieth century, and the rate of increase since 1976 has been approximately three times
faster than the century - scale trend.»
Second, as Gavin pointed out, the land - ocean
temperature index tends to underestimate the truth because it's based on sea
surface temperature rather
than air
temperature, while the meteorological - station index
temperature tends to overestimate the truth because land warms
faster than ocean.
Dr. Roz Pidcock, PhD in physical oceanography from the University of Southampton (http://www.carbonbrief.org/blog/2014/10/an-in-depth-look-at-the-oceans-climate-change-and-the-hiatus/): «Over the last 15 years or so,
surface temperatures have risen much slower
than in previous decades, even though we're emitting greenhouse gases
faster than we were before.»
The increase in these winds has caused eastern tropical Pacific cooling, amplified the Californian drought, accelerated sea level rise three times
faster than the global average in the Western Pacific and has slowed the rise of global average
surface temperatures since 2001.
The former is likely to overestimate the true global
surface air
temperature trend (since the oceans do not warm as
fast as the land), while the latter may underestimate the true trend, since the air
temperature over the ocean is predicted to rise at a slightly higher rate
than the ocean
temperature.
If the
surface temperature is slow to catch up to that imbalance then the energy imbalance remains large, and we can have sufficient net heating to cause much
faster changes in the ice sheets
than from the comparatively smaller imbalances caused by the changes in Earth's orbit associated with the glacial periods in the past.
If a significant fraction of this heat lost from the ocean went into the atmosphere one might have expected the
surface air
temperature to have increased
faster during this period
than during the subsequent period of the 1990s when the ocean heat content gained > 5 X 10 ^ 22 J, but this is not what was observed (see reference Figure 2.7 c in the IPCC TAR Working group I).
The land - only «amplification» factor was actually close to 0.95 (+ / -0.07, 95 % uncertainty in an individual simulation arising from fitting a linear trend), implying that you should be expecting that land
surface temperatures to rise (slightly)
faster than the satellite values.
Apparently, in the last decade or so,
surface and lower troposphere
temperature has risen more slowly
than the long term trend, but ocean heat content to 2 km has risen
faster than the previous two decades.
Yet measurements from more
than 3600 automated buoys throughout the ocean that dive down a mile and a quarter and take detailed
temperature and salinity profiles every ten days show that the deeper strata are warming
faster than the near -
surface strata.
100 years of 0.5 W / m2 energy imbalance can only raise ocean basin
temperature 0.2 C which can not raise air temperature more than 0.2 C. Temperature rise can be temporarily higher in the ocean's surface if energy is being added faster at the surface than it can diffuse downward to the o
temperature 0.2 C which can not raise air
temperature more than 0.2 C. Temperature rise can be temporarily higher in the ocean's surface if energy is being added faster at the surface than it can diffuse downward to the o
temperature more
than 0.2 C.
Temperature rise can be temporarily higher in the ocean's surface if energy is being added faster at the surface than it can diffuse downward to the o
Temperature rise can be temporarily higher in the ocean's
surface if energy is being added
faster at the
surface than it can diffuse downward to the ocean floor.
Surface temperatures over land regions have warmed at a
faster rate
than over the oceans in both hemispheres.
At this computer - predicted «hot spot» high above the Earth, the UN's models project that greenhouse warming will cause
temperature to rise over the decades at a rate up to three times
faster than at the
surface.»
Many agricultural regions warm at a rate that is
faster than the global mean
surface temperature (including oceans) but slower
than the mean land
surface temperature, leading to regional warming that exceeds 0.5 °C between the +1.5 and +2.0 °C Worlds.
Models are very consistent, as this article demonstrates, in showing a significant difference between
surface and tropospheric trends, with tropospheric
temperature trends warming
faster than the
surface.
However, another important recent paper by Kevin Cowtan and Robert Way showed that the global
surface temperature rise has not slowed as much as some previously thought; in fact, the
surface warming since 1997 happened more
than twice as
fast as previous estimates.»
For one thing, it's not «hot» (just expected to have a slightly
faster temperature rate increase
than the
surface).
It may be a consequence of a period in which
surface air
temperature rose
faster over land
than it did over sea.
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.
When heat stays nearer the ocean
surface, forcing raises
surface temperature faster than when more of the heat is distributed at lower depths.
The results here reveal a larger picture — that the western tropical Indian Ocean has been warming for more
than a century, at a rate
faster than any other region of the tropical oceans, and turns out to be the largest contributor to the overall trend in the global mean sea
surface temperature (SST)»
Here the land
temperatures warm and cool
faster than the ocean sea
surface temperatures.
(1) The warm sea
surface temperatures are not just some short - term anomaly but are part of a long - term observed warming trend, in which ocean
temperatures off the US east coast are warming
faster than global average
temperatures.
Since the 1980s, many climatologists have claimed that human activity has caused the near -
surface air
temperature to rise
faster and higher
than ever before in history.
Craig King - Further to Bob Loblaw's comments; that global
surface air
temperatures are warming
faster than upper ocean
temperatures is well - observed and completely uncontroversial.
Only if the oceans freeze across their entire
surfaces thereby causing the hydrological cycle to cease or if the sun puts in energy
faster than it can be pumped upward by the hydrological cycle will the basic
temperature equilibrium derived from the properties of water and the density and pressure of the atmosphere fail to be maintained.
atmospheric absorption by CO2 and water vapor increases, reducing the solar heating at the
surface, and
surface evaporation increases
faster with
temperature than the transfer of sensible heat (due to the Clausius - Clapeyron relation), both of which tend to reduce the diurnal cycle.
A positive feedback will re-inforce the trend and cause
surface temperature (globally / temporally averaged, of course) to rise even
faster than it would have without the feedback.
The results of NCAR's CMIP5 calculations are that after 1970, the simulated
surface temperature increases
faster than the data, so that by 2005 the model anomaly is 0.4 oC larger
than the observed anomaly.
The results of NCAR's CMIP5 calculations are that after 1970, the simulated
surface temperature increases
faster than the data, so that by 2005 the model anomaly is 0.4 deg C larger
than the observed anomaly.
That's a key reason
surface temperatures haven't appeared to warm as
fast as many had expected in the past ten years — although ocean warming has sped up, and sea level rise has accelerated more
than we thought, and Arctic sea ice has melted much
faster than the models expected, as have the great ice sheets in Greenland and Antarctica
And that, combined with the current record ocean
temperatures — and
faster than expected warming of the ocean's
surface layer — means we can expect a continuation of the unexpectedly
fast loss of Arctic sea ice and of land - locked ice in Greenland and Antarctica.
Climate models predict, that as a consequence of global warming, the TLT will warm about 20 %
faster than the Earth's
surface temperature.
Of course there is uncertainty in the trends (both from fitting the OLS line, + / -0.6 ºC, and structurally, since RSS has slightly different numbers), and there is no expectation that TLT and
surface air
temperature should have identical trends (overall, TLT should be increasing a little
faster than SAT — but this is also subject to noise over relatively short periods).
Part of the explanation is probably due to the fact that
temperatures are more stable in the Southern hemisphere (since land heats and cools
faster than ocean, and there is much more ocean in the southern half of the globe), but the
surface temperature records do not show such a north - south differential.
In the almost sure knowledge that the earth never experienced a runaway greenhouse even with ancient CO2 levels 10 to 20 times greater
than today, these anti-science scoundrels insist with a «high level of confidence» that this amplification is real and it's based on nothing more
than faster than expected
surface temperature rise in the past few decades which can be TOTALLY explained by multi-decadal cyclic behavior in ocean currents, trade winds, and / or solar magnetic activity causing small global average albedo changes.