UAH Global Temperature Update for February, 2013: +0.18 deg. C
By Dr. Roy Spencer
Our Version 5.5 global average lower tropospheric temperature (LT) anomaly for February, 2013 is +0.18 deg. C, a large decrease from January’s +0.50 deg. C. (click for large version):
These large month-to-month changes are not that uncommon, especially during Southern Hemisphere summer, and are due to small variations (several percent) in the convective heat flux from the ocean surface to the atmosphere.
The global, hemispheric, and tropical LT anomalies from the 30-year (1981-2010) average for the last 14 months are:
YR MON GLOBAL NH SH TROPICS
2012 1 -0.134 -0.065 -0.203 -0.256
2012 2 -0.135 +0.018 -0.289 -0.320
2012 3 +0.051 +0.119 -0.017 -0.238
2012 4 +0.232 +0.351 +0.114 -0.242
2012 5 +0.179 +0.337 +0.021 -0.098
2012 6 +0.235 +0.370 +0.101 -0.019
2012 7 +0.130 +0.256 +0.003 +0.142
2012 8 +0.208 +0.214 +0.202 +0.062
2012 9 +0.339 +0.350 +0.327 +0.153
2012 10 +0.333 +0.306 +0.361 +0.109
2012 11 +0.282 +0.299 +0.265 +0.172
2012 12 +0.206 +0.148 +0.264 +0.138
2013 1 +0.504 +0.555 +0.453 +0.371
2013 2 +0.176 +0.369 -0.016 +0.169
Related:
Global Microwave Sea Surface Temperature Update for Feb. 2013: -0.01 deg. C
The global average sea surface temperature (SST) update for Feb. 2013 is -0.01 deg. C, relative to the 2003-2006 average: (click for large version)
The anomalies are computed relative to only 2003-2006 because those years were relatively free of El Nino and La Nina activity, which if included would cause temperature anomaly artifacts in other years. Thus, these anomalies cannot be directly compared to, say, the Reynolds anomalies which extend back to the early 1980s. Nevertheless, they should be useful for monitoring signs of ocean surface warming, which appears to have stalled since at least the early 2000′s. (For those who also track our lower tropospheric temperature [“LT”] anomalies, these SST anomalies average about 0.19 deg. C cooler over 2003-2006.)
The SST retrievals come from Remote Sensing Systems (RSS), and are based upon passive microwave observations of the ocean surface from AMSR-E on NASA’s Aqua satellite, the TRMM satellite Microwave Imager (TMI), and WindSat. While TMI has operated continuously through the time period (but only over the tropics and subtropics), AMSR-E stopped nominal operation in October 2011, after which Remote Sensing Systems patched in SST data from WindSat. The various satellite datasets have been carefully intercalibrated by RSS.
Despite the relatively short period of record, I consider this dataset to be the most accurate depiction of SST variability over the last 10+ years due to these instruments’ relative insensitivity to contamination by clouds and aerosols at 6.9 GHz and 10.7 GHz.

Really need to start seeing some negative numbers….
They are all anomalies 🙂
Not read all the comments but bw was right. Nothing worthy of comment really. No slope, no trend, nothing.
DaveE.
maybe these “entities” in Calif are getting a clue:
California cancels CO2 permit sale amid no demand
SAN FRANCISCO, March 4 (Reuters Point Carbon) – The California Air Resources Board (ARB) on Friday said that since no covered entities have signaled their intent to purchase high-priced allowances from the state’s reserve, the March 8 sale has been cancelled…
http://www.pointcarbon.com/news/1.2206612?&ref=searchlist
Qalter Dnes says:
March 4, 2013 at 5:38 pm
Hadley v3 – April 1997 to January 2013
UAH – September 2008 to January 2013 (also September 2008 to February 2013)
Would you happen to have the slope for Hadley3? (WFT only goes to November and SkS only goes to December.) Thanks!
As for UAH, WFT says the slope = -0.000609524 per year from July 2008 to January 2013. Am I missing something?
http://www.woodfortrees.org/plot/uah/from:2008.5/plot/uah/from:2008.5/trend
In reply to:
MattN says:
March 4, 2013 at 6:17 pm
Really need to start seeing some negative numbers….
William:
The extreme AGW paradigm gig is up if there is planetary cooling. It will be interesting to listen to the extreme AGW paradigm pushers’ fabrications to explain global cooling.
Past climate cycles correlate with solar magnetic cycle changes. The paleoclimatic record shows there is a 10 to 12 year delay in planetary cooling when the sun changes from a series of very active solar magnetic cycles to a Maunder minimum set of cycles. The sun appears to be rapidly moving to a Maunder minimum. There appears to be early observational evidence of global cooling.
The extreme AGW paradigm pushers appear to have painted themselves into a corner with comments that the time to discuss AGW science is over. The AGW climate science is settled. Scientists that do not support the extreme AGW paradigm are “deniers”.
For example David Suzuki.
http://www.davidsuzuki.org/issues/climate-change/science/climate-change-basics/climate-change-deniers/
David Suzuki
“The debate is over about whether or not climate change is real (William: Suzuki defines the debate to be about climate change, not climate sensitivity to forcing changes, to avoid discussion observations and analysis that does not support the extreme AGW movements agenda which is to reverse industrial development. The climate debate is about the magnitude of the future warming, as current warming is roughly half of what was predicted and has stalled. The debate is also about the IPCC general circulation models that assume the planet amplifies warming which is not correct as satellite analysis of top of the atmosphere radiation vs ocean temperatures indicates the planet resist warming by increasing or decreasing clouds in the tropics).
Irrefutable evidence from around the world—including extreme weather events, record temperatures, retreating glaciers and rising sea levels—all point to the fact that climate change is happening now and at rates much faster than previously thought. (William: Suzuki does not provide facts to support his statements. Actual planetary temperature data indicates the warming has stopped. The IPCC models predict continued warming as atmospheric CO2 increases.)
http://www-eaps.mit.edu/faculty/lindzen/236-Lindzen-Choi-2011.pdf
“On the Observational Determination of Climate Sensitivity and Its Implications
We estimate climate sensitivity from observations, using the deseasonalized fluctuations in sea surface temperatures (SSTs) and the concurrent fluctuations in the top-of-atmosphere (TOA) outgoing radiation from the ERBE (1985-1999) and CERES (2000-2008) satellite instruments. Distinct periods of warming and cooling in the SSTs were used to evaluate feedbacks. An earlier study (Lindzen and Choi, 2009) was subject to significant criticisms. The present paper is an expansion of the earlier paper where the various criticisms are taken into account. ….
….we show that simple regression methods used by several existing papers generally exaggerate positive feedbacks and even show positive feedbacks when actual feedbacks are negative. We argue that feedbacks are largely concentrated in the tropics, and the tropical feedbacks can be adjusted to account for their impact on the globe as a whole. Indeed, we show that including all CERES data (not just from the tropics) leads to results similar to what are obtained for the tropics alone – though with more noise.
… We again find that the outgoing radiation resulting from SST fluctuations exceeds the zerofeedback response thus implying negative feedback. In contrast to this, the calculated TOA outgoing radiation fluxes from 11 atmospheric models forced by the observed SST are less than the zerofeedback response, consistent with the positive feedbacks that characterize these models. The results imply that the models are exaggerating climate sensitivity.”
….However, warming from a doubling of CO2 would only be about 1C (based on simple calculations where the radiation altitude and the Planck temperature depend on wavelength in accordance with the attenuation coefficients of wellmixed CO2 molecules; a doubling of any concentration in ppmv produces the same warming because of the logarithmic dependence of CO2’s absorption on the amount of CO2) (IPCC, 2007). This modest warming is much less than current climate models suggest for a doubling of CO2. Models predict warming of from 1.5C to 5C and even more for a doubling of CO2. Model predictions depend on the ‘feedback’ within models from the more important greenhouse substances, water vapor and clouds….
http://www.spiegel.de/international/world/0,1518,662092,00.html
“Even though the temperature standstill probably has no effect on the long-term warming trend, it does raise doubts about the predictive value of climate models, and it is also a political issue. For months, climate change skeptics have been gloating over the findings on their Internet forums. This has prompted many a climatologist to treat the temperature data in public with a sense of shame, thereby damaging their own credibility.
“It cannot be denied that this is one of the hottest issues in the scientific community,” says Jochem Marotzke, director of the Max Planck Institute for Meteorology in Hamburg. “We don’t really know why this stagnation is taking place at this point.”
Just a few weeks ago, Britain’s Hadley Centre for Climate Prediction and Research added more fuel to the fire with its latest calculations of global average temperatures. According to the Hadley figures, the world grew warmer by 0.07 degrees Celsius from 1999 to 2008 and not by the 0.2 degrees Celsius assumed by the United Nations Intergovernmental Panel on Climate Change. And, say the British experts, when their figure is adjusted for two naturally occurring climate phenomena, El Niño and La Niña, the resulting temperature trend is reduced to 0.0 degrees Celsius — in other words, a standstill.”
http://www.forbes.com/sites/warrenmeyer/2012/02/09/understanding-the-global-warming-debate/
“The problem for global warming supporters is they actually need for past warming from CO2 to be higher than 0.7C. If the IPCC is correct that based on their high-feedback models we should expect to see 3C of warming per doubling of CO2, looking backwards this means we should already have seen about 1.5C of CO2-driven warming based on past CO2 increases. But no matter how uncertain our measurements, it’s clear we have seen nothing like this kind of temperature rise. Past warming has in fact been more consistent with low or even negative feedback assumptions.”
March 4, 2013 at 4:29 pm | James Abbott says:
“[ … ] can now turn to Australia:
The Bureau of Meteorology has confirmed the three summer months ending February 28 were the hottest season ever recorded in Australia, leading the government’s Climate Commission to label it the “Angry Summer” in a new report. “The Australian summer over 2012 and 2013 has been defined by extreme weather events across much of the continent, including record-breaking heat, severe bushfires, extreme rainfall and damaging flooding,” the report said.
Australia experienced its hottest ever average national maximum temperature on January 7 of 40.30 degrees Celsius (104.5 Fahrenheit), while 44 sites, including Sydney and Hobart, recorded all-time high temperatures in the summer. The report said there have only been 21 days in 102 years where the average maximum temperature for the whole of Australia has exceeded 39 Celsius and eight of these happened in the summer just gone.”
————————
Bollocks … you may like to refer to the response here:
This summer the Bureau of Meteorology (BOM) invented a whole new metric to measure average national heat, which might be all very well except no-one (other than the BOM) seems to know what it is.
On January 7th the BOM claimed Australia set a new “average maximum daily temperature record”. Now the headlines are about the “hottest” Australian summer.
With both records, no one outside the BOM team has access to the methods or data. This post is about the new “daily” temperature of Australia used to declare Jan 7th was a record, but the same point applies to the “hottest summer” records, even though they may be a different data set. Where is the data? Where are the methods?
Is the BOM a science agency or a PR bureau?
Source: http://joannenova.com.au/2013/03/mystery-black-box-method-used-to-make-all-new-australian-hottest-ever-records/
James Abbott says:
March 4, 2013 at 4:01 pm
“Encouraging” for skeptics is data that backs their position.
I don’t have a position other than “I don’t like the warmists’ methods.” Skeptics have shown ALL of the methods to be suspect, from the simple (types of thermometers used in gathering data) to the difficult (all things feedback-oriented), and everything in-between (models).
Since all of the above is in question, the conclusions are a joke, scientifically speaking. It’s not science at all. The skeptic position is “Follow the scientific method.” Therefore, in this article, the only thing to check is “Did Spencer report the data properly?” I think that’s pretty simple, lol.
One of the unknown pluses about the climate debate is the increased knowledge of science [see the above comments]. I was trained as an engineer but was a salesman most of my life. Ordinary people posting on WUWT completely lose me with their knowledge and mathamatics. My bad!
“It would appear that January was a bit of an anomaly then… an outlier as it were.”
Not so if you factor in the long-term trend. There are plenty of excursions from the trend line of similar magnitude (both warm and cool)
http://www.woodfortrees.org/plot/uah/plot/uah/from:1979/to:2013/trend
The largest outliers on record occurred in 1998, whether or not the trend is factored. And yet 1998 (or 1997) is often used as a start date for temp trends. I wonder why that is.
Would it be possible for an Australian to submit a FOIA request for their BOM’s new methodology?
“And yet 1998 (or 1997) is often used as a start date for temp trends. I wonder why that is.”
That was an extremely strong El Nino period. However, it was followed, almost immediately, by a 2 year period of La Nina. The La Nina wasn’t as strong as the El Nino, but because it was more than twice as long, it’s effect on the trend was almost equal to the El Nino. Take a look at this table.
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/ensoyears.shtml
So basically, the effects on the trend of the first El Nino plus the first La Nina period is virtually nil. This basically means that the argument that people pick 97/98 as a starting point may have merit in terms of the motivation, but it has no merit in terms of the effect on the trend. In other words, selecting Jan 98 as your starting point gives a true picture of the trend from that time to the present. This has also been confirmed by people who have ENSO filtered the data before calculating the trend line. The ENSO filtered line has a virtually identical slope to a non ENSO filtered data set.
Bottom line is that there has been no real warming for 15 years.
FOIA has been submitted but they claim they will release it as a peer reviewed paper in the near future.
James Abbott says:
March 4, 2013 at 4:29 pm
Whether or not Oz is having it’s Anthropogenic measured late Holocene whatever thermal excursion I am just having a hard time qualifying this as anomolous as regards typical end-extreme-interglacial norms.
Granted, sea levels are not the same everywhere, but if at the end of the last interglacial, the Eemian, or MIS-5e, sea levels estimated at many places around the globe indicate that temps/sea levels exceeded the late Holocene’s AR4 estimate of +0.59M by one or almost two orders of magnitude….
http://www.uow.edu.au/business/content/groups/public/@web/@sci/@eesc/documents/doc/uow045009.pdf
http://lin.irk.ru/pdf/6696.pdf
…..then I need to understand why the present warming is in any way anomolous.
Without delving at all into what constitutes “anomalous”, we should at least be able to agree that at the very least it has to be more than what tends to happen anyway at an end extreme interglacial……..
And then there is MIS-11, the last time gaia was also at an end-extreme interglacial during an eccentricity minima:
http://si-pddr.si.edu/jspui/bitstream/10088/7516/1/vz_Olson_and_hearty_a_sustained_21m_sea-level_highstand_during_mis_1.pdf
Which brings to mind:
http://www.clim-past.net/6/131/2010/cp-6-131-2010.pdf
Just sayin
“The Bureau of Meteorology has confirmed the three summer months ending February 28 were the hottest season ever recorded in Australia, leading the government’s Climate Commission to label it the “Angry Summer” in a new report.”
And apart from the BOM cooking up a brand you ‘secret weathermen’s business’ metric to conveniently throw out there in the Federal election year ether (yes or no to the carbon tax), you all need to bear in mind the First Fleet rolled up at Sydney Cove in 1788. It was a struggle not to starve for some years before more melanin deprived folks with the odd thermometer began to follow in their path. But let the official Austn Bureau of Statistics 2005 Yearbook take up the tale-
“The Stevenson screen was first introduced to Australia in the 1880s and was installed everywhere, with a few exceptions, by 1910. Prior to this date, thermometers were located in various types of shelter, as well as under verandas and even in unheated rooms indoors. Because of this lack of standardisation, many pre-1910 temperatures in Australia are not strictly comparable with those measured after that date, and therefore must be used with care in analyses of climate change within Australia.”
Now down under the true believers in global warming/climate change/climate disruption/extreme weather have another interesting statistical correlation, namely with a strong belief that the original inhabitants, being much closer to Gaia than themselves, are the font of all wisdom in such matters for the many tens of thousands of years they were here first. That is until they want to talk hysterically about reliable thermometer results and then the statistical correlation totally vanishes into thin air. Something to do with tipping points I’d imagine but the more staistically adept among you could perhaps explain it.
While we here in Australia have to endure the rantings from Flannery and the latest rubbish, sorry report, from the BOM about the “hottest summer evah”, we are now being subjected to the claims that the start of our autumn is looking to be “the hottest evah!” There are comments at the Jo Nava link that completely demolishes the BOM report specifically around weather stations. And if you go to the BOM website and check out station localtion you will notice that most are sites at town/city centres and at airports. Well, if the BOM can “fiddle” with temperature data from NIWA in New Zealand, why not “fiddle” with their own?
D.B. Stealey says:
March 4, 2013 at 4:18 pm
Here is a chart showing a normal y-axis. Not so scary, eh?
—–
Plot that again using zero kelvin as the start of the Y axis on the same graph size and see what that reveals. Why do we look at the top of the graph and blow that line up 1000 times to show the wiggle?
oldfossil says: “This is encouraging. The alarmists have ramped up their hysteria lately”
But it is no longer aimed at us but a last desperate attempt to persuade the lukewarmers who are ignoring them in their droves.
We are better off with the cats doing their thing. Might stay warmer and prevent things like this from happening. It was the cold that got them.
http://www.bbc.co.uk/news/world-asia-21657589
I always thought that degrees Celsius are anomalies with respect to zero Celsius and degrees Fahrenheit anomalies with respect to zero Fahrenheit. Any base line is as good as the base lines from these two gentlemen. For what reason do weather men talk about anomalies and the rest of the world about deviation scores? Do I miss a very profound and interesting story?
The ocean temp fall has caused south east Australia to warm up HA HA http://www.weatherzone.com.au/news/regions-weather-changing/23918
Werner Brozek says:
March 4, 2013 at 7:27 pm
> Qalter Dnes says:
> March 4, 2013 at 5:38 pm
Gack; I can’t even spell my own name right. Q and W are next to each other on the keyboard.
> Hadley v3 – April 1997 to January 2013
>
> UAH – September 2008 to January 2013 (also September 2008 to February 2013)
>
> Would you happen to have the slope for Hadley3? (WFT only goes to November
> and SkS only goes to December.) Thanks!
First of all, Hadley 3 has always had 2 outputs. I prefer the one at http://hadobs.metoffice.com/hadcrut3/diagnostics/global/nh+sh/monthly h*t*t*p*:*/*/*hadobs.metoffice.com/hadcrut3/diagnostics/global/nh+sh/monthly (remove the asterisks to get the real URL). This one has one month per row, so I don’t have to feed it through a shell script to reformat it to plottable CSV data. And it always comes out earlier than the other version (12 months across a row). See http://www.metoffice.gov.uk/hadobs/hadcrut3/diagnostics/time-series.html for the format of the data. Anyhow, the value I get is -0.000251 per year Apr 1997 to Jan 2013.
> As for UAH, WFT says the slope = -0.000609524 per year from July 2008 to
> January 2013. Am I missing something?
> http://www.woodfortrees.org/plot/uah/from:2008.5/plot/uah/from:2008.5/trend
I use the dataset at http://vortex.nsstc.uah.edu/public/msu/t2lt/tltglhmam_5.5 plus I throw in any changes from the posting at Dr. Spencer’s blog at http://www.drroyspencer.com/category/blogarticle/ The UAH EDU site is usually updated a few days after the blog article.
I get Sept 2008 value as -0.005
There’s another version of the file at http://vortex.nsstc.uah.edu/data/msu/t2lt/uahncdc.lt which only goes to 2 decimals. I wonder if WFT is using that one.
William McClenney says:
Which brings to mind:
http://www.clim-past.net/6/131/2010/cp-6-131-2010.pdf
Wow, that’s an interesting link! The similarity to MIS-19 is intriguing. So we may be at the last peak of the Holocene now – before us lie 9000 years of gradual cooling until the next glaciation is upon us. That should be enough time to colonize a friendlier planet if we just stop fooling around with non working AGW “solutions” and other silliness and start making Great Plans again 🙂
D.B. Stealey says:
March 4, 2013 at 4:18 pm
bw, Here is a chart showing a normal y-axis. Not so scary, eh?
Why don’t you use the Kelvin scale. That would make it look even less scary. Mind even a 5 deg departure on the Kelvin scale wouldn’t look too alarming but, as we all know, a 5 deg drop in global average temperatures is enough to cause mile high ice sheets to form across much of the UK.
Rhoda Answer = No way! Australia is a dictatorship run by a tiny politically correct minority who have destroyed the higher education system so you now get guys like Flannery and landwosky ect. BOM will never release the data if they do they will”adjust it” to show hotter than ever