Last month I posted the University of Alabama, Huntsville (UAH) Microwave Sounder Unit (MSU) data for January 2008 with a note that it showed a sharp drop from January 2007 data.
The February data from UAH is out. You can see it the raw data yourself here
It shows a slight rebound from the -0.046°C value of January 2008 to 0.016°C for a slight change (∆T) of .062°C upwards.
click for a larger image
It appears the La Niña in the Pacific and the solar minimum are continuing to affect temperatures globally, resulting in this cooler period for the last 13 months in January 2007.
click for a larger image
Below: A plot of sunspots showing our current position in the solar minimum. Note the uncertainty for the two projections of the next cycle 24.
I’ll plot the other metrics (RSS, GISS, HadCRUT) as soon as they are available. I expect the RSS data to be published soon, perhaps in the next day or two.
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You are QUICK, Anthony. I’ve been clicking on RSS and UAH data several times a day to see if there was an update. Figures as soon as I leave for home…..
Solar cycle #24 coming up.
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The sunspot plot with data through Feb 08 is available at http://www.swpc.noaa.gov/SolarCycle/ . Not surprisingly to those keeping an eye on the sun, there’s no sign of leaving the minimum yet.
Note that http://www.swpc.noaa.gov/SolarCycle/SC24/Oct_2006.html says “The panel expects to issue a preliminary prediction in the spring of 2007. The panel also expects to issue updates to this prediction on an annual basis until a final prediction is issued, approximately 30 months after cycle 24 has begun.”
http://www.swpc.noaa.gov/SolarCycle/SC24/Statement_01.html is the March 2007 statement, I assume a new one will be issued soon.
People are forever calling this cooling a localised La Nina in the pacific. Well that may be the focus but surely if Baghdad sees its first snow in all recorded history we are not looking at simply a localised La Nina. Look at this piccie … is this just a La Nina?
http://www.osdpd.noaa.gov/PSB/EPS/SST/data/anomnight.3.6.2008.gif
Check the Indian ocean surface cooling and see that it is in the tropics and mainly on the equator like the pacific cooling. Check also where the warmer surface is being pushed ….i.e to the higher latitudes and its leading edge is not unremarkably the warmest.
Does anyone get the picture of what’s happening?
For those interested Leif Svalgaard who is on the sunspot committee keeps a research page and updates weekly some interesting parameters of our Sun. His sunspot record go to Feb2008:
http://www.leif.org/research/Most%20Recent%20IMF,%20SW,%20and%20Solar%20Data.pdf
“for a slight change (∆T) of .05°C upwards”
Slight change? That’s a rate of 60 degrees per century!
For those who are interested Leif Svalgaard keeps a weekly
update on sunspots on his research web page.
http://www.leif.org/research/Most%20Recent%20IMF,%20SW,%20and%20Solar%20Data.pdf
A couple notes on the UAH raw data. While the northern hemisphere (NH) went 0.33 degrees to above average, the SH data went below average for the first time in, well, not so long ago, May & June 2006. The 12 month average continued to fall thanks to dropping Feb 2007, a very warm month. March 2007 was also warm, after that goes the global average ought to level off. Then again, I may still have snow on the ground in April here near Concord NH and it’s snowing in Dallas TX today (cool!), so no promises.
Has anyone experimented with non-linear averages? Unix & related systems record a “load average” that has an exponential decay that is trivial to compute, e.g. a new value is something like 5% of the current load plus 95% of the previous average. The problem with the 12 month average we have is that the weather a year ago is just as important as current weather. That’s defensible for looking at historical data, but not so nice for looking at current conditions or projecting trends.
Andrew, I’m no scientist, but one theme that I keep rading in your posts is the connection that the lack of solar activity is a major cause for global cooling. Have you plotted together the data for Sunspot activity and Global Temperature? Looking by eye it appears that as sunspot activity was moving in a downward trend, global temperature was moving in an upwards trend? I do acknowledge that the ISES Data only dates back to 2000 while the MSU Global Temperature dates back to 1979, and therefore not necessarily the best two plots to compare by eye.
REPLY: Anthony is the name. I do have a plot, will do that soon.
“Slight change? That’s a rate of 60 degrees per century!”
Uh, we fell .15 in Jan. That would be a drop of 180 degrees per century!
That Feb change still leaves us way below the trend line. So it will continue to pull the trend line down.
“Looking by eye it appears that as sunspot activity was moving in a downward trend, global temperature was moving in an upwards trend?”
No, sun spot activity was moving in an upward trend until solar cycle 23. 23 was a medium activity cycle. Also remember, that the ocean lag that is built into CO2 warming is also built into solar effect.
Ric, there must be some multiplier of the sun’s output to cause greater changes in climate. There is also probably a lag between what the sun puts out and changes in the climate. The Svalgaard thread, now three of them, on climateaudit.org are examining these questions in excruciating detail.
Answer: the mechanism by which the sun’s output is magnified probably include clouds, ultraviolet radiation, and outgoing longwave radiation.
I think I’ve never heard so loud
The quiet message in a cloud.
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Does anyone know if this latest spot is Cycle 23 or Cycle 24. Which way whirls it?
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Hi,
Anthony it would be nice to see the geomagnetic index plotted also. I think that has more bearing on temperature i.e CRF.
REPLY: I did that some posts back, see this:
http://wattsupwiththat.files.wordpress.com/2008/02/solar-geomagnetic-ap.png
Kim, there was one earlier this week that disappeared so quickly that it didn’t even have a number assigned to it. The last official spot was still on cycle 23. There hasn’t been a spot on Cycle 24 for 2 months now since the reversed one appeared in early January.
It’s just….not……starting……….
We live in interesting times. 🙂
Hi,
Here is a piece that make a case for solar influence on climate.
http://www.happs.com.au/downloaders/Cloud_temp_tropo.pdf
NOAA releases US temp data for Feb 08.
“The average temperature in February 2008 was 34.9 F. This was 0.2 F warmer than the 1901-2000 (20th century) average, the 52nd warmest February in 114 years.”
http://www.ncdc.noaa.gov/oa/climate/research/cag3/na.html
Not asquite as low as January 08, but still continuing the current cooling trend.
I wonder what the number would be if they continued to use the base period they used to use: 1950-1981? The early 20th century was quite cold, and using that data as a base might bring the baseline down some.
Just think out loud again. They’ve just recently swiched to 1901-2000 base period.
Every time a month passes the NOAA/SWPC chart is redrawn with the lower and higher forecasts (the committee has divided in two over cycle 24) but the minimum always slides a month or two ahead of the current results.
Wishful thinking for certain. I’m betting next March.
This is interesting.
SH ice: http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/current.365.south.jpg
NH ice: http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/current.365.jpg
Looks to me like the SH has turned the corner and has started building ice already, earlier than last year. And the NH is still building, so it appears *both* hemispheres are gaining ice coverage right now.
Is that normal? Seriously, I really don’t know if it is or not…
[…] UAH Global temperature data for Feb08: near zero anomaly Last month I posted the University of Alabama, Huntsville (UAH) Microwave Sounder Unit (MSU) data for January 2008 with […] […]
Looking at this piccie again.
http://www.osdpd.noaa.gov/PSB/EPS/SST/data/anomnight.3.6.2008.gif
Just seems the sun is implicated as the driver of this change. Why is the surface cooling across the tropics and mainly on the equator like the Indian and Pacific cooling forming a particularly noticeable band? Why does it appear clearly that the warmer surface is being pushed to the higher latitudes with its leading edge showing as the warmest? Plenty of questions and Jim Arndt’s post to Cloud_temp_tropo.pdf offers pretty good thoughts on the matter.
However, just my thoughts here. One feels that there are always plenty of cosmic rays high in the air, but they and the ions that they liberate are in short supply at low altitudes, so that increases or decreases due to changes in solar magnetism have more noticeable consequences lower down and I suspect at lower latitudes too. Further, as we approach what appears to be an extended solar minimum we are seeing this associated with this cloudy and cooler period across the tropics. This lack of warmth in the ocean will eventually transfer to the high latitudes north and south creating changes. i.e. the cosmic-ray and cloud-forcing hypothesis. Any comment?
It shows a slight rebound from the -0.046°C value of January 2008 to 0.016°C for a slight change (∆T) of .05°C upwards.
Am I missing something? -0.046 delta 0.016 is 0.06°C upwards is it not?
REPLY: you are correct, I had a typo, which is fixed now. Thanks for pointing it out.
MattN,
There’s a pretty broad range of normal in the global sea ice, just in the 29 years of satellite observation. This image shows some past levels:
http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/global.daily.ice.area.withtrend.jpg
Andrew, are you coming to the city again soon?
REPLY: Jeez, who are you talking to? If it is the blog owner, Anthony, then yes I’ll be there sometime in the next month.