Sentences with phrase «observed warming of surface»

Not exact matches

Those weather patterns are linked to warmer surface temperatures in the Pacific and Atlantic oceans, respectively, and correlated with the timing of observed floods on the lower Mississippi.

The future of the currents, whether slowing, stopping or reversing (as was observed during several months measurements), could have a profound effect on regional weather patterns — from colder winters in Europe to a much warmer Caribbean (and hence warmer sea surface temperatures to feed hurricanes).

Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of sea level rise to the observed warming.

The observed fact that temperatures increases slower over the oceans than over land demonstrates that the large heat capacity of the ocean tries to hold back the warming of the air over the ocean and produces a delay at the surface but nevertheless the atmosphere responds quit rapidly to increasing greenhouse gases.

Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere; sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and sea level is rising (Chapter 5).

Both are slightly positive since 1850, and account for approximately 0.2 °C of the observed 0.8 °C surface warming over that period.

Once again, surface warming variability diminishes even further in the late 20th century simulations, and once again these late 20th century simulations are much closer to the observed trends of sea surface warming, than the control and early 20th century simulations.

Although these two lines have not yet been observed in a brown dwarf disk in the sub-mm, they are useful tracers of warm surface - layer gas and disk ionization.

(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.

On the other hand, warming caused by a build up of heat - trapping gases from human activities would cause warming at the surface but cooling in the stratosphere, and this is in fact what we observe.

Since 1950, the authors find that greenhouse gases contributed 166 % (120 - 215 %) of the observed surface warming (0.85 °C of 0.51 °C estimated surface warming).

«The observed pattern of warming, comparing surface and atmospheric temperature trends, doesn't show the characteristic fingerprint associated with greenhouse warming,» wrote lead author David Douglas, a climate expert from the University of Rochester, in New York state.

411 SG Bolstrom, I am observing a particular trend unlike the recent past, whereas the Arctic air profiles are leaning more adiabatically during winter, this means a whole lot of confusion with respect to temperature trends, namely the high Upper Air should cool as the surface warms, and the reverse, the Upper air warms when heat from the lower atmosphere is transferred upwards.

The scariest parts of the Siberian margin are the shallow parts, because this is where methane bubbles from the sea floor might reach the surface, and this is where the warming trend is observed most strongly.

Item 8 could be confusing in having so many messages: «It is extremely likely that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic increase in greenhouse gas... The best estimate of the human - induced contribution to warming is similar to the observed warming over this period....

These results suggest that sea surface temperature pattern - induced low cloud anomalies could have contributed to the period of reduced warming between 1998 and 2013, and offer a physical explanation of why climate sensitivities estimated from recently observed trends are probably biased low 4.

The problem here is that estimates of changes in sea surface temperature and the depth of the warm mixed layer might be very unreliable, since the general behavior of the Atlantic circulation is only now being directly observed — and the most recent findings are that flow rates vary over a whole order of magnitude:

So anthropogenic land use changes (which are strongly biased toward deforestation and desertification) tend to raise the temperature observed at thermometer shelters around the world, while at the same time they tend to reduce the amount of energy available to warm the atmosphere above the surface.

The net effect of these anomalous winds is a cooling in the 2012 global average surface air temperature of 0.1 — 0.2 °C, which can account for much of the hiatus in surface warming observed since 2001.

Paul S (# 1)-- Since the Planck Response dominates over positive feedback responses to temperature, wouldn't a La Nina - like failure of surface temperature to rise lead to an increase rather than a reduction in energy accumulation compared with accumulation during a surface warming — presumably a small increase, so that the observed rise in ocean heat content would still be substantial?

And in turn this warm surface water is left in greater control of the shorter time - scale climate which we have been able to observe during the instrumental period.

If you question whether or not our atmosphere warms the planet, consider what the temperature should be at the surface based on the Stefan - Boltzmann Law and observe the temperatures of the atmosphereless moon.

Here we analyze a series of climate model experiments along with observational data to show that the recent warming trend in Atlantic sea surface temperature and the corresponding trans - basin displacements of the main atmospheric pressure centers were key drivers of the observed Walker circulation intensification, eastern Pacific cooling, North American rainfall trends and western Pacific sea - level rise.

Is it true that the margin of error in the calculation of «global surface temperature» is greater than the observed warming in the last 100 years?

# 92 Spencer el al 2007 paper doesn't really support the precise mechanism proposed by Lindzen for Iris effect, but more simply observes a strong TOA negative correction associated with warming events at 20 ° S - 20 ° N (that is: in the 2000 - 2005 period of observation, the most significative warming episodes of the surface + low troposphere — 40 days or more — leads to a negative SW+LW cloud forcing at the top of the atmosphere).

... but more simply observes a strong TOA negative correction associated with warming events at 20 ° S - 20 ° N (that is: in the 2000 - 2005 period of observation, the most significative warming episodes of the surface + low troposphere — 40 days or more — leads to a negative SW+LW cloud forcing at the top of the atmosphere).

Sciencecodex: A recent study indicated that the urbanization in eastern China has significant impact on the observed surface warming and the temporal - spatial variations of urbanization effect have been comprehensively detected.

Here we would like to try to distinguish between warming in the nocturnal boundary layer due to a redistribution of heat and warming due to the accumulation of heat... It is likely that the observed warming in minimum temperature, whether caused by additional greenhouse forcing or land use changes or other land surface dynamics, is reflecting a redistribution of heat by turbulence - not an accumulation of heat.

The press release from NOAA included this statement from Karl: «Adding in the last two years of global surface temperature data and other improvements in the quality of the observed record provide evidence that contradict the notion of a hiatus in recent global warming trends.»

me warming of the earth's temperature, but that the observed rate of warming (both at the earth's surface and throughout the lower atmosphere) is considerably less than has been anticipated by the collection of climate models upon whose projections climate alarm (i.e., justification for strict restrictions on the use of fossil fuels) is built.

The Global Warming Speedometer for January 2001 to June 2016 shows observed warming on the HadCRUT4 and NCEI surface temperature datasets as below IPCC's least prediction in 1990 and somewhat on the low side of its 1995 and 2001 predictions, while the satellite datasets show less warming than all IPCC predictions from 1990 tWarming Speedometer for January 2001 to June 2016 shows observed warming on the HadCRUT4 and NCEI surface temperature datasets as below IPCC's least prediction in 1990 and somewhat on the low side of its 1995 and 2001 predictions, while the satellite datasets show less warming than all IPCC predictions from 1990 twarming on the HadCRUT4 and NCEI surface temperature datasets as below IPCC's least prediction in 1990 and somewhat on the low side of its 1995 and 2001 predictions, while the satellite datasets show less warming than all IPCC predictions from 1990 twarming than all IPCC predictions from 1990 to 2001.

By comparing modelled and observed changes in such indices, which include the global mean surface temperature, the land - ocean temperature contrast, the temperature contrast between the NH and SH, the mean magnitude of the annual cycle in temperature over land and the mean meridional temperature gradient in the NH mid-latitudes, Braganza et al. (2004) estimate that anthropogenic forcing accounts for almost all of the warming observed between 1946 and 1995 whereas warming between 1896 and 1945 is explained by a combination of anthropogenic and natural forcing and internal variability.

The evolving radiation balance of the earth as seen in the satellite data shows that the energy added by the CO2 and feedbacks is more than sufficient to explain the observed warming surface temperatures.

What's lost in a lot of the discussion about human - caused climate change is not that the sum of human activities is leading to some warming of the earth's temperature, but that the observed rate of warming (both at the earth's surface and throughout the lower atmosphere) is considerably less than has been anticipated by the collection of climate models upon whose projections climate alarm (i.e., justification for strict restrictions on the use of fossil fuels) is built.

On the other hand, warming caused by a build up of heat - trapping gases from human activities would cause warming at the surface but cooling in the stratosphere, and this is in fact what we observe.

«If the surface temperature resumed the warming rate that we observed from, say 1977 through 1998, we would still go close to a quarter of a century without significant net warming because there's such a long flat period built into the record now.

Additionally, the observed surface temperature changes over the past decade are within the range of model predictions (Figure 6) and decadal periods of flat temperatures during an overall long - term warming trend are predicted by climate models (Easterling & Wehner 2009).

Warming accelerates land - surface drying as heat goes into evaporation of moisture, and this increases the potential incidence and severity of droughts, which has been observed in many places worldwide (Dai 2011).

Tamino at the Open Mind blog has also compared the rates of warming projected by the FAR, SAR, and TAR (estimated by linear regression) to the observed rate of warming in each global surface temperature dataset.

-- Andreas Schmittner Could the Earth's observed surface warming of the last 50 years have been caused by ocean circulation?

Using a record ending in 1995, Wentz showed a slight warming trend of 0.07 ⁰ C / decade, about half of what was being observed by surface thermometers.

There's been global warming over the past couple of decades, as observed in ocean warming, surface warming, warming of the troposphere, and Earth's energy balance (i.e. comparing the amount of energy the Earth takes up vs. the amount of energy the Earth releases):

On the explanation of the observed reduction in the surface warming trend over the period 1998 - 2012, Saudi Arabia strongly urged incorporating language from the Technical Summary on models overestimating the warming trend.

If you look from the surface of the Earth right up into the stratosphere, 20 miles above the surface of the Earth, what we've actually observed in weather balloon measurements and satellite measurements is this complex pattern of warming low down and cooling up high.

Figure 3: Percent contributions of various effects to the observed global surface warming over the past 50 - 65 years according to Tett et al. 2000 (T00, dark blue), Meehl et al. 2004 (M04, red), Stone et al. 2007 (S07, green), Lean and Rind 2008 (LR08, purple), Huber and Knutti 2011 (HK11, light blue), Gillett et al. 2012 (G12, orange), and Wigley and Santer 2012 (WS12, dark green).

The alleged absence of pronounced warming in the tropical mid-troposphere is claimed by some as evidence of flawed climate models and that greenhouse gases can not be the main cause of observed surface warming.

It looks likely that the rapid warming of the Arctic has broken the thermometer temperature record in two different ways - firstly by violating the assumption that unobserved regions of the planet warm at a broadly similar rate to observed regions, and secondly by violating the assumption that neighbouring regions of the planet's surface warm at a similar rate.

Meehl and Teng recently showed that when this is done, thereby turning a model projection into a hindcast, the models reproduced the observed trends — accelerated warming in the 1970s and reduced rate of surface warming during the last 15 years — quite well.

Temporary slowdown in global average surface temperature warming observed between 1998 and 2013 represented a redistribution of energy within the Earth system, new research shows.

In any case, as the 2013 IPCC Fifth Assessment Report showed, the observed global surface warming remains within the range of climate model projections.