Sentences with phrase «global oceanic temperature»

Not exact matches

The poles are on the front lines of climate change — melting ice, thawing permafrost, warming temperatures — but they are also at the forefront of weather patterns, global oceanic circulation and the marine food chain.

These rising atmospheric greenhouse gas concentrations have led to an increase in global average temperatures of ~ 0.2 °C decade — 1, much of which has been absorbed by the oceans, whilst the oceanic uptake of atmospheric CO2 has led to major changes in surface ocean pH (Levitus et al., 2000, 2005; Feely et al., 2008; Hoegh - Guldberg and Bruno, 2010; Mora et al., 2013; Roemmich et al., 2015).

Results from a multiregression analysis of the global and sea surface temperature anomalies for the period 1950 — 2011 are presented where among the independent variables multidecade oscillation signals over various oceanic areas are included.

Polar amplification, in which temperatures at the poles rise more rapidly than temperatures at the equator (due to factors like the global atmospheric and oceanic circulation of heat from the equator to the poles), plays a major role in the rate of ice sheet retreat.

These oceanic shifts conspire with the atmosphere to alter global weather by increasing the odds of drought, heavy rain and cool or hot temperatures in different parts of the world.

Polar amplification, in which temperatures at the poles rise more rapidly than temperatures at the equator (due to factors like the global atmospheric and oceanic circulation of heat from the equator to the poles), plays a major role in the rate of ice sheet retreat.

It seems to me, in my lay understanding, that climate change is likely to be expressed as increased average global temperature plus increased mechanical energy in oceanic and atmospheric currents.

This CO2 - driven acidification of the oceans is already under way in our own epoch of global warming - and that same oceanic response in the past coincides with massive rises in temperature - the hyperthermal.

We propose that the recent disproportionate rise and fall in CO2 growth rate were caused mainly by interannual variations in global air temperature (which altered both the terrestrial biospheric and the oceanic carbon sinks), and possibly also by precipitation.

It was therefore easily rebutted when I wrote your «totally unsuitable» is contradicted by three papers: Arrhenius's 1896 paper proposing a logarithmic dependence of surface temperature on CO2, Hansen et al's 1985 paper pointing out that the time needed to warm the oceanic mixed layer would delay the impact of global warming, and Hofmann et al's 2009 paper modeling the dependence of CO2 on time as a raised exponential.

It logically follows that, from time to time, the other oceanic cycles can operate in conjunction with PDO / ENSO to emphasise the effect on the global temperature.

Likewise the oceanic mixed layer (the top one or two hundred meters of water that is roughly constant in temperature compared to deeper down, due to wave - induced mixing in that layer) delays global warming but does not stop it.

I should also have given a more complete list of the problems with your objections: in this case your «totally unsuitable» is contradicted by three papers: Arrhenius's 1896 paper proposing a logarithmic dependence of surface temperature on CO2, Hansen et al's 1985 paper pointing out that the time needed to warm the oceanic mixed layer would delay the impact of global warming, and Hofmann et al's 2009 paper modeling the dependence of CO2 on time as a raised exponential.

«On forced temperature changes, internal variability, and the AMO» «Tracking the Atlantic Multidecadal Oscillation through the last 8,000 years» «The Atlantic Multidecadal Oscillation as a dominant factor of oceanic influence on climate» «The role of Atlantic Multi-decadal Oscillation in the global mean temperature variability» «The North Atlantic Oscillation as a driver of rapid climate change in the Northern Hemisphere» «The Atlanto - Pacific multidecade oscillation and its imprint on the global temperature record» «Imprints of climate forcings in global gridded temperature data» «North Atlantic Multidecadal SST Oscillation: External forcing versus internal variability» «Forced and internal twentieth - century SST trends in the North Atlantic» «Interactive comment on «Imprints of climate forcings in global gridded temperature data» by J. Mikšovský et al.» «Atlantic and Pacific multidecadal oscillations and Northern Hemisphere temperatures»

My link below to article 1041 contains details of my view that the sun drives the various oceanic oscillations which in turn drive global temperature variations with all other influences including CO2 being minor and often cancelling themselves out leaving the solar / oceanic driver supreme.

On balance the evidence shows that solar and oceanic variations are more likely the cause of recent observations of warming in the air than increasing CO2 in the air but the issue can soon be resolved by observing the global air temperature changes that occur during and after the extended cycle 23 and the probable weak cycle 24.

2) D'Aleo, J. and Easterbrook, D.J., 2011, Relationship of multidecadal global temperatures to multidecadal oceanic oscillations: in Easterbrook, D.J., ed., Evidence - Based Climate Science, Elsevier Inc., p. 161 - 184.

But assuming there is an unknown oscillating oceanic mechanism, for example, which varies, in important parts of the globe, the low clouds, there can be variation in the albedo, regardless of global temperature.

If the sun stays quiet, cloud amounts should increase further then, after a while due to oceanic lag, global air temperatures should begin to fall.

«We are being told that some internal oceanic fluctuation may have reduced the upward trend in global temperature,» he says.

Sub-surface oceanic temperature measurements with near global coverage are now available from the late 1940s.

In fact it is more likely that observed changes in the trend of global temperature will be the first and simplest indication as to when a global shift from solar / oceanic warming mode to solar / oceanic cooling mode and vice versa has occurred.

If you look at global temperature curves you will notice that they are actually a concatenation of El Nino peaks and intervening La Nina valleys, with occasional irregularities caused by major oceanic events.

It seems to the writer that spreading global oceanic cycles of up to 30 years in length across 3 solar cycles results in a close enough match to fit temperature observations over the past few hundred years and especially since 1961.

kim (22:04:11): «Well, excellent, but he ignores the present global cooling, as manifest in lower tropospheric temperatures via RSS and UAH, lower oceanic temperatures via Argos buoys, and dropping sea level via TOPEX / Jason.

Figure 2 - B suggests that since 1979 there has been a jump of at most 0.3 °C during the great El Niño of 1997 - 98; (see figure 15 - A showing that El Niño paces the global temperatures as the water of the warm pool is redistributed to the oceanic surface layer at higher latitudes).

Well, excellent, but he ignores the present global cooling, as manifest in lower tropospheric temperatures via RSS and UAH, lower oceanic temperatures via Argos buoys, and dropping sea level via TOPEX / Jason.

The most likely candidate for that climatic variable force that comes to mind is solar variability (because I can think of no other force that can change or reverse in a different trend often enough, and quick enough to account for the historical climatic record) and the primary and secondary effects associated with this solar variability which I feel are a significant player in glacial / inter-glacial cycles, counter climatic trends when taken into consideration with these factors which are, land / ocean arrangements, mean land elevation, mean magnetic field strength of the earth (magnetic excursions), the mean state of the climate (average global temperature), the initial state of the earth's climate (how close to interglacial - glacial threshold condition it is) the state of random terrestrial (violent volcanic eruption, or a random atmospheric circulation / oceanic pattern that feeds upon itself possibly) / extra terrestrial events (super-nova in vicinity of earth or a random impact) along with Milankovitch Cycles.

Until climatologists can properly make models that reflect the entire global history and take into account plate position and how high the plates ride, oceanic levels due to this and the position of oceans, overall insolation, overall daylength and its effects on average global temperature and factor in known carbon dioxide levels over that time period, then they will be unable to give any correlation between current carbon dioxide levels and global temperature.

http://illconsidered.blogspot.com/2006/04/historically-co2-never-causes.html 100 years of shift does not factor into the larger scale phenomena http://illconsidered.blogspot.com/2006/01/one-hundred-years-is-not-enough.html Until climatologists can properly make models that reflect the entire global history and take into account plate position and how high the plates ride, oceanic levels due to this and the position of oceans, overall insolation, overall daylength and its effects on average global temperature and factor in known carbon dioxide levels over that time period, then they will be unable to give any correlation between current carbon dioxide levels and global temperature.

Global warming could have especially strong impacts on the regions of oceanic subpolar fronts, where the temperature increase in deep water could lead to a substantial redistribution of pelagic and benthic communities, including commercially important fish species.

I have already provided examples of observed real world shifts in global temperature trend going back to 1960 that match very well with shifts in the balance between solar variation and the net global effect of all the separate oceanic oscillations (especially the Pacific Decadal Oscillation which is by far the largest).

A compelling case for geothermal forcing lies in the fact that 1) geothermal heat can trigger thermobaric convection and strengthen oceanic overturning, important mechanisms for transferring ocean heat to the overlying atmosphere, and 2) seismic activity is the leading indicator, while global temperature is the laggard.

I think it is time for a general update due to subsequent developments (especially the current 2 year global cooling trend and a quieter sun with cooling oceans after an 8 year temperature plateau which tends to show that my point about solar and oceanic influences on global temperatures has some merit) and the fact that I can make the essential points more simply by condensing them into a series of bullet points as follows:

The first of these concerns the terrestrial and oceanic processes that release greenhouse gases into the atmosphere and then absorb them, and the second is a calculation about what a change in carbon dioxide levels really means for average global temperatures.

ii) Changes in the air alone can not affect the global equilibrium temperature because of oceanic dominance that always seeks to maintain sea surface and surface air equilibrium whatever the air tries to do.

In my articles to date I have been unwilling to claim anything as grand as the creation of a new model of climate because until now I was unable to propose any solar mechanism that could result directly in global albedo changes without some other forcing agent or that could account for a direct solar cause of discontinuities in the temperature profile along the horizontal line of the oceanic thermohaline circulation.

Climate models provide a means to derive such a link, under the assumption that the current generation of climate models captures the essence of the signature of oceanic variability on the global mean temperature.

Some caution is necessary in implicating the tropical Pacific and North Atlantic as the primary sources of oceanic - forced variability in the global mean temperature.

Such concerns, however, are tangential to the global mean temperature signature of oceanic natural variability, which is robust and independent of spatial correlations that might obscure the identification of the precise geographical source of such variability.

These oceanic variations are associated with significant regional and global shifts in temperature and rainfall patterns that are evident in the observations.

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

«Possible forcing of global temperature by the oceanic tides» Charles D. Keeling, Timothy P. Whorf http://www.pnas.org/content/94/16/8321.full

«A general update due to subsequent developments (especially the current 2 year global cooling trend and a quieter sun with cooling oceans after an 8 year temperature plateau which tends to show that my point about solar and oceanic influences on global temperatures has some merit)» - Stephen Wild...