Sentences with phrase «variations in mean global temperature»

I think some such mechanism is necessary to account for the variations in mean global temperature associated with the oceanic oscilations.

Not exact matches

As alluded to in our post, one important issue is the possibility that changes in El Nino may have significantly offset opposite temperature variations in the extratropics, moderating the influence of the extratropical «Little Ice Age» and «Medieval Warm Period» on hemispheric or global mean temperatures (e.g. Cobb et al (2003).

That mean global tropospheric temperature has for the last 50 years fallen and risen in close accord with the SOI of 5 — 7 months earlier shows the potential of natural forcing mechanisms to account for most of the temperature variation.

Tsushima, Y., A. Abe - Ouchi, and S. Manabe, 2005: Radiative damping of annual variation in global mean surface temperature: Comparison between observed and simulated feedback.

He then uses what information is available to quantify (in Watts per square meter) what radiative terms drive that temperature change (for the LGM this is primarily increased surface albedo from more ice / snow cover, and also changes in greenhouse gases... the former is treated as a forcing, not a feedback; also, the orbital variations which technically drive the process are rather small in the global mean).

As long as the temporal pattern of variation in aerosol forcing is approximately correct, the need to achieve a reasonable fit to the temporal variation in global mean temperature and the difference between Northern and Southern Hemisphere temperatures can provide a useful constraint on the net aerosol radiative forcing (as demonstrated, e.g., by Harvey and Kaufmann, 2002; Stott et al., 2006c).

One finds on the secular time scale that both of the X - and Y - component temporal, annual - means profiles of the Earth's Orientation mimic exactly the Global Temperature Anomaly (GTA) annual means profile On the decade time scale one finds that the GTA mimics the Geomagnetic Dipole variations and the variations in the Earths Anomalous Rotation Rate [i.e., Excess Length of Day (ELOD) Annual Memeans profiles of the Earth's Orientation mimic exactly the Global Temperature Anomaly (GTA) annual means profile On the decade time scale one finds that the GTA mimics the Geomagnetic Dipole variations and the variations in the Earths Anomalous Rotation Rate [i.e., Excess Length of Day (ELOD) Annual Memeans profile On the decade time scale one finds that the GTA mimics the Geomagnetic Dipole variations and the variations in the Earths Anomalous Rotation Rate [i.e., Excess Length of Day (ELOD) Annual MeansMeans].

As alluded to in our post, one important issue is the possibility that changes in El Nino may have significantly offset opposite temperature variations in the extratropics, moderating the influence of the extratropical «Little Ice Age» and «Medieval Warm Period» on hemispheric or global mean temperatures (e.g. Cobb et al (2003).

Full climate models also include large regional variations in absolute temperature (e.g. ranging from -50 to 30ºC at any one time), and so small offsets in the global mean are almost imperceptible.

In the Swanson and Tsonis paper it is suggested that the decadal variations of the global mean temperature, the climate shifts, observed in the 20th century are basically caused by the synchronization of four modeIn the Swanson and Tsonis paper it is suggested that the decadal variations of the global mean temperature, the climate shifts, observed in the 20th century are basically caused by the synchronization of four modein the 20th century are basically caused by the synchronization of four modes.

Another equally important challenge is the fact that there are pronounced ~ 11 - year variations in the CRF, but the presence of ~ 11 - year variations in the global mean temperature are much less pronounced than the trend over the 3 — 4 most recent decades.

If the CRF were so important (and the cloud response near - instantaneous) why do we not see more pronounced ~ 11 - year variations in the global mean temperature?

Miskolczi's argument means any variations in global temperature are almost all due to changes in solar and geothermal energy.

Figures A and B show past variations in the global mean temperature inferred from direct measurements (A) and from the analysis of ice - cores (B).

It can be seen from basic greenhouse theory that greenhouse warming should amplify not only the global mean surface temperature but also any variations in the global mean surface temperature that are from non-greenhouse sources at the same rate.

Variations in global - mean temperature are inferred from three different sets of measurements: surface observations, satellite observations, and radiosonde observations.

Also recognizable are numerous apparently natural climate variations, for example, strong temporary cooling in the North Atlantic from the 1950s through the 1970s, which contributed to the lack of global - mean temperature increase during that time.

The truth is nobody has the slightest idea what the small variations in «global temperature» over the course of the 20th century (or any other century) are supposed to mean.

Our results show that the observed rapid rise in global mean temperatures seen after 1985 can not be ascribed to solar variability, whichever of the mechanisms is invoked and no matter how much the solar variation is amplified.»

Variations in the Atlantic Multi-decadal Oscillation (see Section 3.6.6 for a more detailed discussion) could account for some of the evolution of global and hemispheric mean temperatures during the instrumental period (Schlesinger and Ramankutty, 1994; Andronova and Schlesinger, 2000; Delworth and Mann, 2000); Knight et al. (2005) estimate that variations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temVariations in the Atlantic Multi-decadal Oscillation (see Section 3.6.6 for a more detailed discussion) could account for some of the evolution of global and hemispheric mean temperatures during the instrumental period (Schlesinger and Ramankutty, 1994; Andronova and Schlesinger, 2000; Delworth and Mann, 2000); Knight et al. (2005) estimate that variations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temvariations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temperatures.

From the University of Southampton: New study finds variations in global warming trend are caused by oceans New research has shown that natural variations in global mean temperature are always forced by...

Changes in global - mean temperature induced by Earth's orbital variations may be used to quantify the climate sensitivity.

On the time - varying trend in global - mean surface temperature ``... we showed that the rapidity of the warming in the late twentieth century was a result of concurrence of a secular warming trend and the warming phase of a multidecadal (~ 65 - year period) oscillatory variation and we estimated the contribution of the former to be about 0.08 deg C per decade since ~ 1980.»

«These analyses suggest that a contribution from ENSO - e ffects to global temperatures, when expressed as the cumulative sum of the SOI, can potentially account for 50 % of the variation in global mean temperature in the last 50 years — a «large part» of warming, as claimed by McLean et al. [2009].

«These analyses suggest that a contribution from ENSO - e ffects to global temperatures, when expressed as the cumulative sum of the SOI, can potentially account for 50 % of the variation in global mean temperature in the last 50 years -LCB- a «large part» of warming, as claimed by McLean et al. [2009].»

e.g. «These analyses suggest that a contribution from ENSO - e ffects to global temperatures, when expressed as the cumulative sum of the SOI, can potentially account for 50 % of the variation in global mean temperature in the last 50 years — a «large part» of warming, as claimed by McLean et al. [2009].

Variations in the Atlantic Multi-decadal Oscillation (see Section 3.6.6 for a more detailed discussion) could account for some of the evolution of global and hemispheric mean temperatures during the instrumental period; Knight et al. (2005) estimate that variations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temperaturVariations in the Atlantic Multi-decadal Oscillation (see Section 3.6.6 for a more detailed discussion) could account for some of the evolution of global and hemispheric mean temperatures during the instrumental period; Knight et al. (2005) estimate that variations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temperaturvariations in the Atlantic Multi-decadal Oscillation could account for up to 0.2 °C peak - to - trough variability in NH mean decadal temperatures.»

Let's look in more detail at the paper's key figure, the one that looks at past and (forecast) future global temperatures, «Hindcast / forecast decadal variations in global mean temperature, as compared with observations and standard climate model projections» (click to enlarge)

For those who don't understand, this means that the variation in temperature can be of + 0.12 °C (global warming) or -0.08 °C (global cooling).