Sentences with phrase «cold bias»
So is it a warm or cold bias then?
realclimate.org
Thus, our study suggests that one way to improve the equatorial cold bias in the models is to improve the representation of subtropical and mid-latitude cloud albedo.
Here, we investigate the extent to which these equatorial cold biases are related to mean climate biases generated in the extra-tropics and then communicated to the equator via the oceanic subtropical cells (STCs).
Buoys have increased global coverage of the oceans by up to 15 percent since the 1970s, but they have a known cold bias compared to measurements taken from ships.
Both simulations exhibit cold biases compared with observations over WCan, with the bias exacerbated at higher resolution, suggesting little added value for temperature overall.
General circulation models frequently suffer from a substantial cold bias in equatorial Pacific sea surface temperatures (SSTs).
2) The EC - Earth model has a well - known cold bias over the subtropical Atlantic, which is the source region for the mild and moist air being transported to the UK in december 2015.
For example, satellite - derived estimates based on thermal infrared measurements (e.g. Comiso 2000; Kwok and Comiso 2002; Schneider et al. 2004) provide broad spatial coverage, but depend on effective cloud masking, and provide at best a clear - sky dataset that is generally cold biased.
We find no evidence for cold bias in wood or canvas bucket temperatures in the central tropical Pacific when measurement is rapid (∼ 1 min) and the bucket samples of large volume (≥ 5 L).
Thus, the claim by Cowtan and Way (2014) that the ERA - interim analysis shows a rapidly increasing cold bias in HadCRUT4 after 1998 does not apply to HadCRUT4v4 over the longer post 1978 period.
While there is still an effect for changeover from insulated buckets to engine inlets after the 1970s, there is also evidence that the introduction of buoys in this period results in an offsetting cold bias.
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.
In contrary, the only observational evidence shows a cold bias (as has been corrected for the Lin et al. paper after some e-mail discussion with the authors).
«The actual bias from the Lin et al. data under light winds at night is a cold bias.
(The northern Pacific is too active, due to a cold bias and excessive ice formation, resulting in too much communication with deeper oceanic layers.)
However, the model has a cold bias of about − 3 °C and also a dry bias of about 15 % of the mean specific humidity.
The figure shows that the impact of the adjustment to remove the cold bias from bucket sea surface temperature measurements warms the historical data, decreasing the amount of global warming the data indicate.
HadCRUT3 doesn't sample the Arctic at all well, so it probably has a cold bias if you consider it as an estimate of global temperature.
The magnitude of the cloud and cold bias can vary spatially and seasonally, raising questions about the inter-regional and inter-seasonal comparability of trends.
«By the way — the absence of any high elevation or high latitude stations would likely only serve to create a cold bias in the global temperature average because we calculate the gridded and global averages using anomalies — not absolute station temperatures — as I explained in the information in my earlier e-mail to you.
In it, they documented how a change in observing practices before and after World War II produced a cold bias in the sea surface temperatures that were incorporated into the compilations of global average temperatures (see here and here for more details).