UAH global temperature anomaly for May – down again, near zero

UAH_May09-520

Graph by Anthony (click for larger image) text by Dr. Roy Spencer from his blog here

May 2009 Global Temperature Update +0.04 deg. C

June 4th, 2009 by Roy W. Spencer, Ph. D.

YR MON GLOBE   NH   SH   TROPICS

2009   1   0.304   0.443   0.165   -0.036

2009   2   0.347   0.678   0.016   0.051

2009   3   0.206   0.310   0.103   -0.149

2009   4   0.090   0.124   0.056   -0.014

2009   5   0.043   0.043   0.043   -0.168

May 2009 saw another drop in the global average temperature anomaly, from +0.09 deg. C in April to +0.04 deg. C in May, originating mostly from the Northern Hemisphere and the tropics.

A reminder for those who are monitoring the daily progress of global-average temperatures here:

(1) Only use channel 5 (”ch05″), which is what we use for the lower troposphere and middle troposphere temperature products.

(2) Compare the current month to the same calendar month from the previous year (which is already plotted for you).

(3) The progress of daily temperatures should only be used as a rough guide for how the current month is shaping up because they come from the AMSU instrument on the NOAA-15 satellite, which has a substantial diurnal drift in the local time of the orbit. Our ‘official’ results presented above, in contrast, are from AMSU on NASA’s Aqua satellite, which carries extra fuel to keep it in a stable orbit. Therefore, there is no diurnal drift adjustment needed in our official product.

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Flanagan
June 5, 2009 7:14 am

Hi everybody,
of course, the 100 degrees figure was just for fun. The thing is, for what I remember, that the fastest warming regions are around the poles (even if the temperatures do stay below 0 in most parts), so I’m not sure data based on everything-but-the-polar region is really the best choice. RSS should have similar problems.
The French estimate is based on forecasting models for the polar regions, including boundary conditions known from other data set.

MrCPhysics
June 5, 2009 7:20 am

“Watts, who is apparently in the tinfoil-hat and black helicopter club, that poster reveals dark purposes:”
When you can’t argue the facts one resorts to ad hominem attacks. One shouldn’t, but often one does, especially when “one” is a climate “scientist.”
The disgustingly low level of dialog on AGW is going to one day be the shame of ALL of us who consider ourselves scientists. The agenda-driven activist “scientists” have forever tarred the profession for the rest of us.

June 5, 2009 7:23 am

For those interested, I normally post monthly (OI.v2 SST) global, hemispheric, individual ocean, and NINO3.4 SST anomaly data on the 1st or 2nd of each month. Here’s this month’s:
http://bobtisdale.blogspot.com/2009/06/may-2009-sst-anomaly-update.html
Regards

Mike Bryant
June 5, 2009 7:27 am

Climate Progress believes in “Mark’s Arctic Death Spiral!” Anagrammed = “Mark’s Patriarchical Edicts”… I didn’t even know the sea ice was alive…

MarkoL
June 5, 2009 7:38 am

Reported today that in Helsinki Finland we are experiencing the coldest weather in 60 years. So much for GW again.

MikeEE
June 5, 2009 7:41 am

Flanagan (04:36:06) :
Yes, the incomplete coverage of the Earth should be considered, but most regular readers of this blog will know that this has been covered before. See:
http://wattsupwiththat.com/2008/03/08/putting-a-myth-about-uah-and-rss-satellite-data-to-rest/
In it Dr. Christy is quoted to say: (I hope my formatting experimentation works)

As the spacecraft rolls over the pole it does so at an inclined orbit so
that the highest nadir latitude is about 82 deg with the scanner looking
out a bit closer to the pole. Since we apply the scan line data mostly to
the nadir area directly below the satellite, the actual data only go to
about 83 deg. In the gridded data I interpolate over the pole, but I
wouldn’t trust the data too much beyond 85 deg.
MikeEE

MikeEE
June 5, 2009 7:42 am

…and I should have included…
The coverage is such that almost all of the Earth is seen only a few percent is missed.
MikeEE

Ken
June 5, 2009 7:45 am

“How is the zero level defined?”
The mean of all temperatures 1979-1998.

David Y
June 5, 2009 7:51 am

Totally OT here:
Wait for it, everyone…Based on a piece in Yahoo news this morning, some AGW blowhard will, invariably, blame Flight 447’s tragic demise on global warming/climate change/etc.
“Meteorologists said the Air France jet entered an unusual storm with 100 mph (160 kph) updrafts that acted as a vacuum, sucking water up from the ocean. The moist air rushed up to the plane’s high altitude, where it quickly froze in minus-40 degree temperatures. The updrafts also would have created dangerous turbulence.”
Any bets on when Al Gore/Hansen/other says something along the lines of: “Before global warming, airliners never had to deal with this”? I give it 48 hours more (unless I just haven’t seen it yet).

Ron de Haan
June 5, 2009 7:55 am

Ok, David Archibald was a little too optimistic with his temperature projection but…temperature is still going down. It obviously takes more time before the effects of the current solar minimum materialize.
We are in a learning process here and there is no scientist in the world who made any progress without engaging a trial and error process.
I miss the respect for the trial and error process with some of the posters here and I absolutely reject the mentality of burning down people who stick out their necks publishing about subjects to be discussed here.
Without people like David Archibald, and many others, WUWT would be a blank page and nobody would learn anything.

Frank Mosher
June 5, 2009 7:58 am

Anthony. Several people have criticized Archibald’s prediction. ” Those that are without sin cast the first stone”. Before someone is critical of anothers public prediction, ISTM, they should have also made a very public prediction that was substantially more accurate. A little humility goes a long way. fm

Keith W
June 5, 2009 8:08 am

The May AMSU anomaly tracks with surface temperatures away from urban heat islands close to the Canadian border (44’62” N). We are 4.6% above the long term heating degree day averages for this year with snow down to 2000 feet last week and frost again in the valleys last night.

Joe Black
June 5, 2009 8:11 am

1998 was such a gift to the AGW alarmists who like to terminate analysis around AD 2000.

George DeBusk
June 5, 2009 8:11 am

Dave Middleton,
Where can I find the UAH Lower Tropospheric data separated by land and ocean? I have only seen global data and data segregated by latitude bands.
GHD

Milwaukee Bob
June 5, 2009 8:12 am

Ubuntu,
Climate Progress declaring war on WUWT is like Monaco declaring war on the US.
But if you need me Dr. Watts, I have my T-hat (with a brain underneath it) and my old beat-up physics books ready to go.
MKE Bob

Milwaukee Bob
June 5, 2009 8:14 am

Oh, and a really good slip-stick and even and abacus.

Frank Mosher
June 5, 2009 8:15 am

Anthony. Is this ” Flanagan”, the same one who said “hot” in California ? NWS is predicting 4-7 inches snow for Ebbetts, Carson and Tioga passes this evening. There are a lot of hikers/backpackers that will be huddled in their tents this evening, cursing their misfortune. Up your way, i see Redding broke a rainfall record yesterday. fm

Claude Harvey
June 5, 2009 8:15 am

Somehow, this one doesn’t look quite right. The chart in this post appears to be Spencer’s April chart. When I go to Spenser’s site, his May numbers are not yet posted. If you check out the real-time ASMU temp charts at various altitudes, they appear to show temperatures for May ’09 higher than May ’08.
What am I missing here?

June 5, 2009 8:16 am

Flanagan (04:36:06) :
Thanks for the URL. For those of us who don’t read French very well, here is a Link to the site via Google Translate .

June 5, 2009 8:20 am

“Tinfoil-hats and black helicopters?”…It’s a conspiracy theory jab.
“Tinfoil-hats” refers to people who wear such things to prevent the CIA, space aliens or the UN from using mind control devices on them or reading their thoughts. See the movie Signs for an example.
“Black helicopters” refers to mysterious black helicopters (presumably UN helicopters) that were supposedly snooping on Americans in the 1990’s. Some of the “black helicopter” crowd also claimed that the Clinton Administration was putting bar codes on the reverse sides of highway signs so that the UN invaders could navigate our highways – UN invaders drive on the wrong side of the road…I guess. I have a friend who literally believed in this sort of crap.
Basically they are referring to Mr. Watts and WUWT as a bunch of conspiracy geeks because we are skeptical of the AGW fraud. It’s sort of a compliment. It’s like a Creation Science blog referring to a Stephen J. Gould blog as being in “the tinfoil-hat and black helicopter club.”

Ron de Haan
June 5, 2009 8:22 am

Flanagan, get rid of your Toyota Prius and get a life.

David Y
June 5, 2009 8:31 am

re: My OT post at 7:51:40
Aha! The ad hominem specialists at ClimateProgress already beat me to it:
http://climateprogress.org/2009/06/04/marc-moranos-banner-headline-did-global-warming-help-bring-down-air-france-flight-447/
Sorry, no prizes for anyone.

Editor
June 5, 2009 8:33 am

Ubuntu (06:25:51) :
NSDIC’s Dr Mark Serreze is carving WUWT a new one on Climate Progress.
Cute. Dr. Romm lobbed Dr. Serreze a softball and the newly-appointed director of NSIDC responds with an ad-hominem attack on Anthony Watts. Great Science going on over there at Climate Progress. Rather than explaining why NSIDC and arctic-roos graphs are different, the best Dr. Romm can say is “They do things a little differently”.
I’m sure there is no connection whatsoever, but it is interesting how that arctic ice melt line started going down when Dr. Serreze was apponted.

Ron de Haan
June 5, 2009 8:33 am

Exclusive: New NSIDC director Serreze explains the “death spiral” of Arctic ice and the “breathaking ignorance” of blogs like WattsUpWithThat
From: http://climateprogress.org/
Congratulations Anthony, I regard it as a compliment when professional warmistas take aim at WUWT.
It’s like an open invitation.
It’s only a pitty that they don’t allow you to post a comment if it does not support their overheated ideas.

J.Hansford
June 5, 2009 8:39 am

Very interesting.
CO2 is going up, but temperature is staying down…. Not what the Hypothesis of AGW says is supposed to happen…. Not to mention the fact that no computer model modeled this outcome…. They are not very good at proving their assertions on climate are they?
Keep up the good reporting Anthony.
I had a quick look at ” Climate Progress” Ubuntu, and was a bit appalled at what passed for Journalism there. WUWT is very Fair and Balanced compared to that blog I reckon.

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