Sentences with phrase «caused warming signal»

A human - caused warming signal is embedded in the rich, year - to - year and decade - to - decade noise of natural internal climate variability.

The hockey stick provides compelling evidence for the emergence of a human - caused warming signal from the background noise of natural fluctuations in climate.

Not exact matches

Other research signals that the albedo effect «causes so much warming that permafrost thaws even despite the cooling from shrubs,» he said.

The goal is to capture natural variations in the climate, like changes in ocean circulation or features like the El Niño Southern Oscillation, that are swamped by the signal of human - caused warming when looking out to the end of the century.

Unfortunately, it is also dealing with potential design flaws that cause the tablet to become very warm and experience weak Wi - Fi signals.

NOAA research shows that the tropical multi-decadal signal is causing the increased Atlantic hurricane activity since 1995, and is not related to greenhouse warming.»

Fundamentally, a number of physically plausible hypotheses about what else might be causing the 1950 - present warming signal are being evaluated.

By the way, low clouds in darkness increase surface temperature, sort of like the inverse property of commonly understood Cosmic ray effect, not causing a cooling because there are more CR's, but rather a warming, which only low clouds in total darkness can do, so the probable CR temperature signal gets cancelled from one latitude dark vs bright region to the next.

Adjusting for El Nino might be difficult in that global warming may cause change in frequency of El Nino hence such adjustment might remove some of the signal as well as some of the noise.

Some climate denialists continue to try and argue that rather than with a steady man - made warming signal, the data are better fit with abrupt step changes caused by El Niño events, followed by flat periods.

Against such a noisy background, it is hard to detect the signal from any changes caused by humanity's increased economic activity, and consequent release of atmosphere - warming greenhouse gases such as carbon dioxide.

Dr Nisbet's hypothesis about the tropical wetlands is the most alarming, for it could signal an Arctic - like feedback loop there, whereby global warming could be causing them to release more methane by making them hotter and wetter.

In fact this «pause» signal may be best interpreted as warming because normally when the PDO is negative it causes «global cooling» in the atmosphere.

He goes on to conclude that the small fractional change in station wind - speed values relative to reanalysis values are unlikely to have caused a global bias in trends of Tmin in calm conditions approaching -0.1-C over the 50 - year period, equivalent to -0.02-C / decade, 1 / 10 - th of the observed warming signal.

So we have no correlation between solar activity and strong warming in 2007 morphing to the new view that solar changes are causing cooling and masking the AGW signal.

But now we see that it's the urban areas that are cause the ambient warming signal, if any.

Warming and cooling signals in weather noise is not so easy to determine as to the cause.

The purpose IS as you said: to «extract the most reliable global warming signal», which is POSTULATED, not theorized, to exist, certify that it is caused by ACO2, and provide a laundry list of undesirable to catastrophic consequences which ARE befalling us (present tense) and which will continue and escalate unless political action is taken to drastically curb our use of fossil fuels.

In other words natural variability dominates the observed record making it impossible to detect any human - caused global warming signal even if one were to exist (which there is no proof of).

Foster and Rahmstorf (2011) have published a paper in Environmental Research Letters seeking to extract the human - caused global warming signal from the global surface temperature and lower troposphere temperature data.

So if CO2 increases cause the 20th century global warming then clearly changes in the CO2 concentration should dominate the global temperature signal over that period (CO2 lagged, but not much one suspects, and potentially non-linear)?

You are now talking about showing the «global warming signal is clear» not addressing the evidence for CO2 being the dominant cause of it (which is what we were both talking about to begin with).

For example a paper on measuring the global warming signal in the instrumental temperature record may say nothing about the cause.

If you look at the information closely, there is NO hard causal link between CO2 and global heating, AND there certainly is NO human CO2 signal that can even be detected as a cause for warming.

Barnett et al. (2005) investigated the cause of this warming signal, and concluded as follows.

As Curry observes, an infinite number of statements could have been made, ranging from «it is extremely likely that the anthro pogenic increase in greenhouse gases has caused some warming» (not very informative, since an infinitesimally small warming is of no policy relevance) to «it is about as likely as not that greenhouse - gas - induced warming exceeds the total observed warming» (which indicates the size of the greenhouse signal, but understates our confidence in attribution).

I'll stick with AC exhausts near thermometers causing a spurious warming signal, Marco (I can test that one all by myself).

If these are near the measuring device, they will cause a spurious warming signal; this does not take «rocket science» to figure out.

Watts» claim that AC exhausts, heated buildings and asphalt parking lots, etc. cause a spurious warming signal has NOT been refuted at all by Menne, contrary to what you claim.