Sentences with phrase «global air temperature change»

I looked under the heading global temperatures list of contents and «Estimates of recent global air temperature change» and it shows graphically exactly what your talking about.

Estimates of recent global air temperature change don't show that.

Partail statement: «The average global air temperature changes as concentrations of CO2 in the atmosphere vary.»

If the sun is primarily responsible for observed global air temperature changes (even if heavily modulated by ocean behaviour as I contend elsewhere) then we need to know sooner rather than later otherwise a misdiagnosis of the causes of climate change could cause unimaginable disruption and hardship through the imposition of incorrect remedies.

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.

Not exact matches

The map below shows the observed change in global near - surface air temperature since 1900.

However, as climate change raises global air temperatures, it is possible that East Antarctic glaciers could start melting, a change that could make the ice sheet shift back into unstable territory.

Water changes temperature more slowly than the air or land, which means the global ocean heat is likely to persist for some time.

To remove this difference in magnitude and focus instead on the patterns of change, the authors scaled the vertical profiles of ocean temperature (area - weighted with respect to each vertical ocean layer) with the global surface air temperature trend of each period.

In the case of the global temperature change caused by El Nino, there's still a «reason» for climate change, to be found in the coupled air - sea interaction..

Climate sensitivity is a measure of the equilibrium global surface air temperature change for a particular forcing.

-- Climate impacts: global temperatures, ice cap melting, ocean currents, ENSO, volcanic impacts, tipping points, severe weather events — Environment impacts: ecosystem changes, disease vectors, coastal flooding, marine ecosystem, agricultural system — Government actions: US political views, world - wide political views, carbon tax / cap - and - trade restrictions, state and city efforts — Reducing GHGs: + electric power systems: fossil fuel use, conservation, solar, wind, geothermal, nuclear, tidal, other + transportation sector: conservation, mass transit, high speed rail, air travel, auto / truck (mileage issues, PHEVs, EVs, biofuels, hydrogen) + architectural structure design: home / office energy use, home / office conservation, passive solar, other

This was one of the motivations for our study out this week in Nature Climate Change (England et al., 2014) With the global - average surface air temperature (SAT) more - or-less steady since 2001, scientists have been seeking to explain the climate mechanics of the slowdown in warming seen in the observations during 2001 - 2013.

Thus, small changes of global average air temperature are associated with very large changes in some regions, particularly over land, at mid - to high latitudes, in mountain regions.

ie does a slightly lower density of air mean a slightly lower ground level temperature (temperature normally decreases with height at the lower air density), so that in reality adding CO2 and subtracting more O2 actually causes miniscule or trivial global COOLING, and the (unused) ability of the changed atmosphere to absorb radiation energy and transmit it to the rest of the air is overruled or limited by the ideal gas law?

Climate sensitivity is a measure of the equilibrium global surface air temperature change for a particular forcing.

I think it's a mistake to refer to changes in global average surface air temperatures as if they were definitive measures of the change to the climate system.

Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).

McIntyre has a new post where he tries to rescue the previous «projections» — but he confuses the changes in HadSST (ocean temperatures, which he is plotting) and the changes in HadCRUT3 (the global surface air temperature anomaly) which is what his projection was for (as can be seen in the figures in the main post).

How can the ideal gas law predict a trivial change in temperature (due to the change in air density by substituting CO2 for oxygen) when the GCMs predict global warming of 4 to 11 degrees?

If La Nina / El Nino can affect global air temperatures in a period of a few years, than other changes in ocean currents (driven by AGW) can affect global atmospheric heat content in a few years.

The climate sensitivity is defined as the equilibrated change in global mean surface air temperature (SAT) for a given change in radiative forcing and has been a major focus of climate research over the last three decades.

The equilibrium climate sensitivity refers to the equilibrium change in average global surface air temperature following a unit change in the radiative forcing.

(3) Changes in global atmospheric CO2 are lagging about 9.5 - 10 months behind changes in global surface air tempeChanges in global atmospheric CO2 are lagging about 9.5 - 10 months behind changes in global surface air tempechanges in global surface air temperature.

This is what most of us think of when we talk about «Global Warming»; that it is changes in the air temperature!

Dana, I think you are pushing in the right direction with this; heat content is a much more direct measure of the underlying changes to the climate system than average air temperatures and climate science communicators should make heat content their first response to the suggestion that global warming is something that waxes and (allegedly, recently) wanes.

Changing global temperatures induce air circulation changes as the air seeks to restore the sea surface / surface air temperature equilibrium...

The FAR used simple global climate models to estimate changes in the global mean surface air temperature under various CO2 emissions scenarios.

Global average surface air temperature is one of the most well - recognized metrics of contemporary climate change — hence the term «global warming&rGlobal average surface air temperature is one of the most well - recognized metrics of contemporary climate change — hence the term «global warming&rglobal warming».

Sealing time of air bubbles at best about 70 years and mixing with ambient air through diffusion all that time, chemical changes thereafter, different diffusion rates for different gases thereafter... ice cores are a target - rich environment for casting of doubt about how well they perform as global temperature proxies.

Surface warming: «Global temperature evolution: recent trends and some pitfalls» «Coverage bias in the HadCRUT4 temperature series and its impact on recent temperature trends» «Recently amplified arctic warming has contributed to a continual global warming trend» «On the definition and identifiability of the alleged «hiatus» in global warming» «Global land - surface air temperature change based on the new CMA GLSAT dataset&Global temperature evolution: recent trends and some pitfalls» «Coverage bias in the HadCRUT4 temperature series and its impact on recent temperature trends» «Recently amplified arctic warming has contributed to a continual global warming trend» «On the definition and identifiability of the alleged «hiatus» in global warming» «Global land - surface air temperature change based on the new CMA GLSAT dataset&global warming trend» «On the definition and identifiability of the alleged «hiatus» in global warming» «Global land - surface air temperature change based on the new CMA GLSAT dataset&global warming» «Global land - surface air temperature change based on the new CMA GLSAT dataset&Global land - surface air temperature change based on the new CMA GLSAT dataset»

Relationships between the change in net top - of - atmosphere radiative flux, N, and global - mean surface - air - temperature change, ΔT, after an instantaneous quadrupling of CO2.

The majority of power in the US comes from burning fossil fuels resulting in both air quality problems and massive greenhouse gas emissions contributing to the rise of global temperatures and climate change.

Running 60 - month averages of global air temperature at a height of two metres (left - hand axis) and estimated change from the beginning of the industrial era (right - hand axis) according to different datasets: ERA - Interim (Copernicus Climate Change Service, ECMWF); GISTEMP (NASA); HadCRUT4 (Met Office Hadley Centre), NOAAGlobalTemp (NOAA); and JRA - 55 change from the beginning of the industrial era (right - hand axis) according to different datasets: ERA - Interim (Copernicus Climate Change Service, ECMWF); GISTEMP (NASA); HadCRUT4 (Met Office Hadley Centre), NOAAGlobalTemp (NOAA); and JRA - 55 Change Service, ECMWF); GISTEMP (NASA); HadCRUT4 (Met Office Hadley Centre), NOAAGlobalTemp (NOAA); and JRA - 55 (JMA).

Ghil, 2013, explored the idea of abrupt climate change with an energy balance climate model that follows the evolution of global surface - air temperature with changes in the global energy balance.

Maps show projected change in average surface air temperature in the later part of this century (2071 - 2099) relative to the later part of the last century (1970 - 1999) under a scenario that assumes substantial reductions in heat trapping gases (B1) and a higher emissions scenario that assumes continued increases in global emissions (A2).

Internal variability can only account for ~ 0.3 °C change in average global surface air temperature at most over periods of several decades, and scientific studies have consistently shown that it can not account for more than a small fraction of the global warming over the past century.

I'm inclined to think that Ocean Heat Content, trends in land ice and Sea levels are more appropriate indicators of global climate change than surface air temperatures, but that's another issue.

The NAO's prominent upward trend from the 1950s to the 1990s caused large regional changes in air temperature, precipitation, wind and storminess, with accompanying impacts on marine and terrestrial ecosystems, and contributed to the accelerated rise in global mean surface temperature (e.g., Hurrell 1996; Ottersen et al. 2001; Thompson et al. 2000; Visbeck et al. 2003; Stenseth et al. 2003).

The averaged surface air temperature anomaly (dT) is widely recognised to be the most important index characterising the global climate changes including «global warming» (Bell et al. 1998; Anisimov and Polyakov 1999).

Permafrost is very sensitive to direct changes in air temperature and snow cover, making it especially vulnerable to global warming.

To point out just a couple of things: — oceans warming slower (or cooling slower) than lands on long - time trends is absolutely normal, because water is more difficult both to warm or to cool (I mean, we require both a bigger heat flow and more time); at the contrary, I see as a non-sense theory (made by some serrist, but don't know who) that oceans are storing up heat, and that suddenly they will release such heat as a positive feedback: or the water warms than no heat can be considered ad «stored» (we have no phase change inside oceans, so no latent heat) or oceans begin to release heat but in the same time they have to cool (because they are losing heat); so, I don't feel strange that in last years land temperatures for some series (NCDC and GISS) can be heating up while oceans are slightly cooling, but I feel strange that they are heating up so much to reverse global trend from slightly negative / stable to slightly positive; but, in the end, all this is not an evidence that lands» warming is led by UHI (but, this effect, I would not exclude it from having a small part in temperature trends for some regional area, but just small); both because, as writtend, it is normal to have waters warming slower than lands, and because lands» temperatures are often measured in a not so precise way (despite they continue to give us a global uncertainity in TT values which is barely the instrumental's one)-- but, to point out, HadCRU and MSU of last years (I mean always 2002 - 2006) follow much better waters» temperatures trend; — metropolis and larger cities temperature trends actually show an increase in UHI effect, but I think the sites are few, and the covered area is very small worldwide, so the global effect is very poor (but it still can be sensible for regional effects); but I would not run out a small warming trend for airport measurements due mainly to three things: increasing jet planes traffic, enlarging airports (then more buildings and more asphalt — if you follow motor sports, or simply live in a town / city, you will know how easy they get very warmer than air during day, and how much it can slow night - time cooling) and overall having airports nearer to cities (if not becoming an area inside the city after some decade of hurban growth, e.g. Milan - Linate); — I found no point about UHI in towns and villages; you will tell me they are not large cities; but, in comparison with 20-40-60 years ago when they were «countryside», many small towns and villages have become part of larger hurban areas (at least in Europe and Asia) so examining just larger cities would not be enough in my opinion to get a full view of UHI effect (still remembering that it has a small global effect: we can say many matters are due to UHI instead of GW, maybe even that a small part of measured GW is due to UHI, and that GW measurements are not so precise to make us able to make good analisyses and predictions, but not that GW is due to UHI).

The latest climate science shows that in addition to climate mitigation, the world will need to remove carbon from the air and store it if we are to have a good chance of achieving the global goals of limiting temperature rise to 1.5 - 2 degrees C (2.7 - 3.6 degrees F), the temperature limit countries agreed to as part of the international Paris Agreement on climate change.

An independent estimate of global - mean evaporation provides additional support, but critical assumptions on relative humidity and the air - sea temperature difference changes are made that do not have adequate observational basis and are inconsistent with climate models.»

Well, when we combine 20th century global forcings with air temperature changes in smaller areas we get the climate sensitivities shown below (note: these estimates are intended only to show the range of variation.

When we say «global warming» what we're actually talking about here are the air temperatures which, as one of the authors told me, is a relatively «fickle» measure of climate change.

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.

The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and, indirectly, from increases in average global sea levels, retreating glaciers, and changes in many physical and biological systems.

The global annual mean surface air temperature change... centred at the time of CO2 doubling in a 1 % per year compound CO2 increase scenario.

Yet on these sites (and in the media, and even by a few semi related scientists who kinda keep an eye on the issue or are semi involved) treat it as if it is some sort of both immediate, and linear, contemporaneous correlation between increased lower level atmospheric re radiation, and increased (or changed) global ambient air temperatures, which is absurd, and belies any real deep understanding of the actual issue.