Sentences with phrase «land temperature variations»

«The Folland and Parker bias estimates have been shown to compare well to coastal land temperature stations and used to drive atmosphere only GCMs that have reproduced the land temperature variations over large areas of the world».

The Folland and Parker bias estimates have been shown to compare well to coastal land temperature stations and used to drive atmosphere only GCMs that have reproduced the land temperature variations over large areas of the world (See Folland et al. 2005 for more details, copy here: http://www.metoffice.gov.uk/hadobs/hadsst3/references.html).

Not exact matches

Discussions on whether temperature or water availability is driving the strength of these variations in the land carbon sink have been highly contested with these year - to - year changes of the carbon balance seemingly related to global or tropical temperatures.

Lembongan is a pristine tropical island, its highest point is 50 meters above sea level, little temperature variation from 30 degrees Celsius occurs between the only two seasons in a total of 615 ha unproductive rocky land.

In their paper Decadal Variations in the Global Atmospheric Land Temperatures, they find that the largest contributor to global average temperature variability on short (2 - 5 year) timescales in not the El Nino - Southern Oscillation (ENSO)(as everyone else believes), but is actually the Atlantic Multidecadal Oscillation (AMO).

There will be Regionally / locally and temporal variations; increased temperature and backradiation tend to reduce the diurnal temperature cycle on land, though regional variations in cloud feedbacks and water vapor could cause some regions to have the opposite effect; changes in surface moisture and humidity also changes the amount of convective cooling that can occur for the same temperature distribution.

If one takes the MBH98 / 99 reconstruction as base, the variation in the pre-industrial period was ~ 0.2 K, of which less than 0.1 K (in average) from volcanic eruptions, the rest mostly from solar (I doubt that land use changes had much influence on global temperatures).

After accounting for volcanic and human effects, the residual variability in land - surface temperature is observed to closely mirror (and for slower changes slightly lead) variations in the Gulf Stream.

As others have noted, the IPCC Team has gone absolutely feral about Salby's research and the most recent paper by Dr Roy Spencer, at the University of Alabama (On the Misdiagnosis of Surface Temperature Feedbacks from Variations in Earth's Radiant Energy Balance), for one simple reason: both are based on empirical, undoctored satellite observations, which, depending on the measure required, now extend into the past by up to 32 years, i.e. long enough to begin evaluating real climate trends; whereas much of the Team's science in AR4 (2007) is based on primitive climate models generated from primitive and potentially unreliable land measurements and proxies, which have been «filtered» to achieve certain artificial realities (There are other more scathing descriptions of this process I won't use).

This factor, when multiplied times the amount of reduction in tropospheric aerosol emissions, between 1975 and another later year will give the average global temperature for that year (per NASA's J - D land - ocean temperature index values) to within less than a tenth of a degree C. of actuality (when temporary natural variations due to El Nino's, La Nina's, and volcanic eruptions are accounted for).

In conclusion, our analysis suggests that strong interannual and decadal variations observed in the average land surface temperature records represent a true climate phenomenon, not only during the years when fluctuations on the timescale of 2 - 15 years had been previously identified with El Nino events.

However, over long time periods, the variation of the global average temperature with CO2 concentration depends on various factors such as the placement of the continents on Earth, the functionality of ocean currents, the past history of the climate, the orientation of the Earth's orbit relative to the Sun, the luminosity of the Sun, the presence of aerosols in the atmosphere, volcanic action, land clearing, biological evolution, etc..

The natural variation that has led us out of the Little Ice Age has a bit of frosting on the cake by land use; and, part of that land use has resulted in a change in vegetation and soil CO2 loss so that we see a rise in CO2 and the CO2 continues to rise without a temperature accompaniment (piano player went to take a leak), as the land use has all but gobbled up most of the arable land North of 30N and we are starting to see low till farming and some soil conservation just beginning when the soil will again take up the CO2, and the GMO's will increase yields, then CO2 will start coming down on its own and we can go to bed listening to Ave Maria to address another global crisis to get the populous all scared begging governments to tell us much ado about... nothing.

Our non-linear model of the land air temperature (T)-- driven by the measured Arosa total ozone (TOZ)-- explains 75 % of total variability of Earth's T variations during the period 1926 — 2011.

The impact of these changes in cloud cover can account for the variations in HadCRUT4 global average temperature anomalies and the divergence between land and sea temperatures.

The variation over time of the hydrological variables and temperature are shown below for averages over land areas for NW, NE, SW and SE Europe.

Dr. Curry Paper on decadal variation: We find that the strongest cross-correlation of the decadal fluctuations in land surface temperature is not with ENSO but with the AMO

Estimates of temperature variations near the earth's surface are based on thermometer readings taken daily at thousands of land stations and on board thousands of ships.

The authors» analyses suggest that contributions of urbanization and local land use / cover changes to the all - Nepal record are minimal and that the all - Nepal record provides an accurate record of temperature variations across the entire region.

If it were possible to switch off the radiative properties of the atmosphere the land surface would suffer far more dramatic diurnal temperature variations but the troposphere would heat dramatically.

There is much greater temperature variation on land than in the ocean, and a much greater variation on land which is distant from the ocean compared to the variation on land close to it.

The ability to approximate an average field for one period is not the same as tuning to all possible variations of SST and land temperature so I don't think your argument holds.

We conclude that the most valid model of the spatial pattern of trends in land surface temperature records over 1979 — 2002 requires a combination of the processes represented in some GCMs and certain socioeconomic measures that capture data quality variations and changes to the land surface.

Unresolved issues that will be addressed in a series of forthcoming studies include the effects of ocean dynamics on the predictability of low - frequency atmosphere and land variability and the feedback of soil moisture variations on atmospheric temperatures and circulation (e.g., Rowntree and Bolton 1983; Atlas et al. 1993; Koster et al. 2000).

E.g. anthroprogenic fossil fuel combustion and solar / cosmic ray variation / earth precession impacting insolation and clouds and consequently land and ocean circulation and temperature driving and temperature dependent microbial decay driving CO2 emissions, and CO2 / temperature driven biomass growth?

As a result, temperature variations on land are greater than on water.

The title of the paper is «Decadal variations in the global atmospheric land temperatures».

4) Decadal Variations in the Global Atmospheric Land Temperatures Richard A. Muller1, 2,3, Judith Curry4, Donald Groom2, Robert Jacobsen1, 2, Saul Perlmutter1, 2, Robert Rohde3, Arthur Rosenfeld1, 2, Charlotte Wickham5, Jonathan Wurtele1, 2

There have been numerous research papers and reviews published over the past 10 years, including several in prestigious journals such as Nature and Science, that conclude that the observed temperature changes over the past 100 years are consistent with the combined changes in atmospheric aerosols (volcanic and anthropogenic), land surface changes, variations in solar irradiance and increases in greenhouse gases.

Here, we present an explanation for time - invariant land — sea warming ratio that applies if three conditions on radiative forcing are met: first, spatial variations in the climate forcing must be sufficiently small that the lower free troposphere warms evenly over land and ocean; second, the temperature response must not be large enough to change the global circulation to zeroth order; third, the temperature response must not be large enough to modify the boundary layer amplification mechanisms that contribute to making φ exceed unity.

As noted in my earlier reply, the annual variations in monthly global land surface temperatures are 4 times higher than those of TLT.

No other contingency — e.g. potential variations in global temperature sensitivity to CO2, solar output, land use — were considered.

the annual variations in monthly global land surface temperatures are 4 times higher than those of TLT.

They used several simple indices, including the land - ocean contrast, the meridional gradient, and the magnitude of the seasonal cycle, to describe global climate variations and showed that for natural variations, they contain information independent of the global mean temperature.