Sentences with phrase «surface datasets»

Or should the satellite series show the same warming trend as surface datasets, if they're accurate?

Using the IPCC's gold - standard global surface dataset (the UK's HadCRUT4), this chart plots the cumulative growth in temperature along with NOAA's reported cumulative growth in atmospheric CO2 levels (ppm).

For the period 1979 - 2004, the three surface datasets and the UAH MSU lower tropospheric dataset (T2LT) show the following trends (in degrees / decade), along with the 2SD error:

I guess when someone answers that satisfactorily, or demonstrates that that is the case (in the Hadcrut data for example), I might sit up and take the surface dataset more seriously.

Yet that dataset, which, like all the surface datasets, was recently adjusted to deliver the global warming that measurements did not show, now indicates a warming trend over those same eight years at a rate equivalent to more than 1.5 degrees / century.

If the surface has warmed in the past couple of decades, as the surface datasets now pretend, CO2 can not have been the cause.

2: Why, two years ago, did every surface temperature dataset agree with the satellites that there had been no global warming this millennium, and why, though the two satellites continue to show little or no warming, was every surface dataset altered in the two years preceding the Paris climate conference in a manner calculated to show significant warming?

It is legitimate to infer that the surface datasets have been altered to try to bring the reported warming closer to the failed but (for now) still profitable predictions.

Although Forest 2006 stated that the Curry et al. 2005 study used the Forest 2006 data (and indeed relied upon that study's results in relation to the surface dataset), the MIT model surface temperature simulation dataset for Curry et al. 2005 was very different from that used in the other study, Sanso et al. 2008.

All of the surface datasets are updated every month as new data becomes available and understanding of uncertainties improves.

This latter climate shift makes it especially difficult to interpret trends seen in satellite or surface datasets that are only a decade or two in length, since an apparent upward trend in something like temperature may be partly anthropogenic and partly natural over a time period in which only one natural climate shift occurred.

New Statement: For the past 5 years (60 months), there is statistically significant global warming in the two satellite datasets, the surface datasets indicate a non-significant warming trend.

The divergence is even greater between the three surface datasets and the warming projections of the IPCC's first (1990) assessment report.

As I said, if you have a study that you think shows such a sunspot - related signal in some surface dataset, send me two links, one to the study and one to the data it's based on, and I'll take a look at it.

We all remember Mears's statement that he considered the surface datasets to be more reliable, partly because they agree with each other better than the sat datasets do.