Comments on: HadCrut & NOAA October Temperature Anomalies: Lower than September.

By: lucia

lucia — Thu, 03 Dec 2009 14:06:49 +0000

Gaz–

Why not use last Wednesday?

The AR4 projections are based on a set of Scenarios that were published in late 2000 (roughly November, if memory serves me right.) January 2001 is the first month of the year after those SRES were defined. I prefer to test projections or predictions made before the events could be observed. So, January 2001 is the first date I consider reasonable. Earlier dates permit comparison to hindcasts because both the temperatures and the forcings had already occurred.

If you read my blog you will see that I regularly post comparisons beginning in many earlier years. For example, in this post, you can see I show a graph beginning in 1990 as well as 2001.

By: Gaz

Gaz — Thu, 03 Dec 2009 03:35:58 +0000

“..Jan 2001, which I use as my preferred start date…”

Ha ha bloody ha.

Why not use last Wednesday?

By: tetris

tetris — Fri, 20 Nov 2009 23:40:09 +0000

Lucia,
I know weather is only weather, but West coast temps here in BC have been well below the norm with the exception of late September-early October, and there are new snow records being established both in terms of quantity and early in the season.

By: crosspatch

crosspatch — Fri, 20 Nov 2009 18:16:13 +0000

I will agree that the first half of the month has seemed warm in the continental US but I am seeing indications that the second half of the month is going to be chilly. Though the chill might start a bit too late to influence the monthly mean very much.

By: DG

DG — Fri, 20 Nov 2009 15:09:59 +0000

Files for HadCRUT data are dated thru 3-9-2009.
http://www.cru.uea.ac.uk/cru/data/temperature/

By: vg

vg — Fri, 20 Nov 2009 06:41:49 +0000

refer to previous post to assess credibility of ANYTHING from British met Office

By: lucia

lucia — Fri, 20 Nov 2009 04:28:46 +0000

tetris–
Yes. That said, temperature could still go up. It’s been a warm November in Illinois.

By: DG

DG — Fri, 20 Nov 2009 04:27:39 +0000

Previous HadCRUT temps keep getting adjusting upward month after month.

By: tetris

tetris — Fri, 20 Nov 2009 04:20:10 +0000

Interesting as we are experiencing an El Nino.

By: Fred Nieuwenhuis

Fred Nieuwenhuis — Fri, 20 Nov 2009 01:09:57 +0000

Again, note that GIS, HADCRUT and NOAA do not have Canadian data. See note from NOAA:

Please Note: This preliminary assessment was made before data from Canada was made available. Therefore, some of the ranks presented in this report could change slightly when Canadian data is included in the final record. The inclusion of the missing data may cause modest changes to global-scale ranks. The assessment for Northern Hemisphere land temperatures could change by several ranks.