Tuesday, August 5, 2008

How much have ocean temperatures changed since the inception of Argo ?

15 comments:

Anonymous said...

Comparison of Argo data with previous oceanographic datasets indicates that the present-day ocean is warmer (in the globally-averaged sense) than the ocean of 50 years ago, by about 0.4-degrees C at the sea surface. Smaller warming trends are seen in sub-surface layers, extending even into the abyssal oceans. A recent paper in Nature by C. Domingues and colleagues (Nature, Volume 453, June 19, 2008, pp 1090-1093) summarizes the present knowledge on global ocean temperature change, ocean heat content, and the contribution of ocean warming to sea level rise.

The results of Domingues et al (2008) do not show a constant rate of warming. Instead there are periods of warming interspersed with multi-year cooling periods. There is also regional variability in the multi-decadal trends. Moreover, there is uncertainty in the results because of sparse sampling of the oceans and instrumental errors during the pre-Argo era. In spite of the variability and the uncertainty, the evidence for a 50-year warming trend in the oceans is compelling.

For the period since Argo achieved global coverage, 2004-2008, there is no significant trend in the globally averaged temperature. There is considerable regional and depth-variability over this time period, but the global mean temperature is approximately constant. Given the 50-year temperature record, a 4-year period of constant temperature is not particularly unusual, and should not be taken to indicate any change in the multi-decadal warming trend.

It will of course be of great interest to see how the Argo temperature record of the next 5-10 years compares to both the historical 50-year record and to the present Argo 4-year record. The Argo team will continue to make every effort to maintain the global Argo array and to provide data of highest possible quality.

Argo Steering Team

Ayrdale said...

May I ask for a regular precis, in layman's language of any significant findings. I understand the essential long term nature of this study, but if serious sea level rises are going to occur because of climate change then I would expect some significant sea temperature readings; n'est ce pas ?

Anonymous said...

Interesting how anonymous takes data from argo that shows no significant change in 4 years and adds data that is knon to be scientificly incomplete and unreliable. I guess its the only way to make the information say what he wants it to say.
Please lets use real consistent data from this excellent source and watch it for trends. Lets wait to jump into the jump into the ocean like Lemmings until we see an alarming warming trend. Oh Ya the Lemmings running into the ocean was a made up lie by some scientists so they could get funding for studys. Scientists are human and lei for financial gain just like regular people.
John Weismantel

I.F. Stone said...

So, 'regular people' lie for financial gain ?

You mean, like global warming 'Skeptics' that made their wealth in a global oil-based economy, and are desperately trying to spread FUD (fear, uncertainty, and doubt) among the Public to delay a transition to low carbon energy ?

Yeah, everyone knows that.

But unlike WSJ readers and paid coal utility shills, scientists have to rigorously PROVE what they say.

Anonymous said...

Please, Mr Anonymous of the Argo Steering Team - how can you say that there is "compelling" evidence of warming over the last 50 yaers when the evidence comes from bathythermographs - much less accurate than Argo and poorly dispersed (especially in the southern hemisphere). it's statements like this that smack of desperation to make the data fit an agenda, and which make the much reviled skeptics. . skeptical.

Anonymous said...

You Say "..since Argo achieved global coverage, 2004-2008, there is no significant trend in the globally averaged temperature."

But according to something else I have read there is a downward trend. See Here: http://icecap.us/images/uploads/argodata.jpg

What do you have to say about that?

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Hank Roberts said...

Please check your site occasionally.
This thread has spammers, see above.

Elsewhere, septics are 'interpreting' your info like this, Posted on 11/23 at 12:55 PM:

http://icecap.us/index.php/go/joes-blog/another_top_international_scientist_jumps_off_global_warming_titanic/

".... Argo*, the official world sea temperatures record (as much as 80% of the earth’s heat is held in the oceans). It seems our oceans are getting very cold according a survey from the world’s top 50 international laboratories - so perhaps we may see more icebergs forming to snare that rudderless IPCC ship?. ...."

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Peter said...

I love listening to all these arguments. As I see it, Argo is there to get answers to a problem that, to the enlightened is very obviously happening. I dare anyone to spend some time behind my helm facing a violent storm that shouldn't be there. Its a little harder than sitting in an armchair knocking the results of those looking for answers...

Peter

Jargon = J&G said...

All we really need is scientific fact, not made up stuff.

Nearly five years have passed since the opening post was made, when Argo Steering Team wrote "It will of course be of great interest to see how the Argo temperature record of the next 5-10 years compares to both the historical 50-year record and to the present Argo 4-year record," so where and what is the comparison so far?

Anonymous said...

Well, another four years have past and the argo program has found exactly how much "catastrophic" heating in the four major oceans?

Anonymous said...

It's now 2014. How is that theory about ocean warming coming along?