Sentences with phrase «warm bias exists»

Compared to nearby ground - level instruments and nearby airports and surrounding COOPs, it is clear that a strong warm bias exists, partially because of the rooftop location.

«In direct contradiction to Richard Muller's BEST study, the new Watts et al 2012 paper has very effectively shown that a substantive warm bias exists even in the mean temperature trends....»

http://pielkeclimatesci.wordpress.com/2012/07/29/comments-on-the-game-changer-new-paper-an-area-and-distance-weighted-analysis-of-the-impacts-of-station-exposure-on-the-u-s-historical-climatology-network-temperatures-and-temperature-trends-by-w/ «In direct contradiction to Richard Muller's BEST study, the new Watts et al 2012 paper has very effectively shown that a substantive warm bias exists even in the mean temperature trends.

Not exact matches

[1] CO2 absorbs IR, is the main GHG, human emissions are increasing its concentration in the atmosphere, raising temperatures globally; the second GHG, water vapor, exists in equilibrium with water / ice, would precipitate out if not for the CO2, so acts as a feedback; since the oceans cover so much of the planet, water is a large positive feedback; melting snow and ice as the atmosphere warms decreases albedo, another positive feedback, biased toward the poles, which gives larger polar warming than the global average; decreasing the temperature gradient from the equator to the poles is reducing the driving forces for the jetstream; the jetstream's meanders are increasing in amplitude and slowing, just like the lower Missippi River where its driving gradient decreases; the larger slower meanders increase the amplitude and duration of blocking highs, increasing drought and extreme temperatures — and 30,000 + Europeans and 5,000 plus Russians die, and the US corn crop, Russian wheat crop, and Aussie wildland fire protection fails — or extreme rainfall floods the US, France, Pakistan, Thailand (driving up prices for disk drives — hows that for unexpected adverse impacts from AGW?)

Either way, he renders his reporting, on the matter of climate change and global warming, illegitimate; probably maintains his considered claim to legitimacy based on his uninformed perspective and his existing market base, with established bias.

However, no data exist to 10 evaluate if this warming included a seasonal bias.

The station where a bias or shift is know to exist in the data record may still be used in estimation of missing reports at nearby high quality stations for non-critical points (i.e not a recent, warm or cold value.

Thus, there now exists a built in bias impacting global warming calculations, which heat - up the actual climate reality.

Cool biases are sure to exist and perfectly cancel the warm biases

It seems likely that similar poor siting biases also exist in global thermometer datasets, and this has probably led to an overestimation of the amount of «global warming» since the 19th century.

Moreover, it is not clear that the relationship that happens to exist in CMIP5 models between present day biases and future warming is a stable one, even in global climate models.

What is the basis for believe that there exist ANY bias on that account, let alone, a warming bias?

Moreover, whilst some downwards bias in HadCRUT4v4 warming may exist, there are also possible sources of upwards bias, particularly over land, such as the effects of urbanisation and of destabilisation by greenhouse gases of the night - time boundary layer.

Given that the radiation reaches the satellite sensors having travelled through a warming lower atmosphere and cooling stratosphere, that bias exists between the various sensors, issues with orbital decay, and a host of other obstacles, there's a lot of careful and painstaking analysis required, and much that can go wrong.

C / decade and the simulated ensemble mean over the models, calculated from the grid boxes of the models where observations exist (which is flawed in my opinion, since excluding of mostly the high latitudes from the model data may emphasize a warm bias in lower latitudes in the models making them appear warmer than they are, but a possible cold bias of the global observations data set is not excluded in this way) had a trend of 0.3 deg.

The instrumental temperature data that exist before 1850, although increasingly biased towards Europe in earlier periods, show that the warming observed after 1980 is unprecedented compared to the levels measured in the previous 280 years, even allowing for the greater variance expected in an average of so few early data compared to the much greater number in the 20th century.