I’ve moved to WordPress. This post can now be found at Update of NODC (Levitus et al 2009) OHC Data Through June 2009
###############UPDATE (October 16, 2009):
This post contains erroneous data that was posted by the NODC at their website. The graphs have been updated in the post "NODC Corrections to Ocean Heat Content (0-700m) Part 3". I have left this post intact for those who wish to compare the graphs of the individual basins.
Earlier updates to this post are now located at the end.
UPDATE (October 11, 2009):
Joe Romm of ClimateProgress noted in his reply to my comment on his post “Skeptical Science explains how we know global warming is happening: It’s the oceans, stupid!”, “Heck you don't even link to the article, which was "published 11 April 2009" (!!) whereas all the data you list is subsequent to that.”
For those who are incapable of clicking on the NODC links that I do provide in the following post and discovering that Levitus et al (2009) is linked there, here’s a direct link to the paper:
ftp://ftp.nodc.noaa.gov/pub/data.nodc/woa/PUBLICATIONS/grlheat08.pdf
Note: Joe’s closing clause in the quote above (“…whereas all the data you list is subsequent to that.”) is curious. It reflects his misunderstanding of what I presented or it reflects his attempt to misdirect his readers. Either way, he missed the mark. In the following post, I graphed the updated NODC data that’s available through KNMI. And that’s really all the post is about. It’s an update. Nothing more, nothing less. It includes all of the base Levitus et al (2009) data from January 1955 to December 2008 PLUS the recently released updated data from January 2009 through June 2009. Based on Joe Romm’s reasoning, we should disregard all climate data (SST, TLT, TSI, sea level, etc.) that are posted after the paper that introduces the dataset or maybe Joe is suggesting that all updates need to be peer reviewed.
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INTRODUCTION
On October 1, KNMI updated the NODC Ocean Heat Content (Levitus et al 2009) data that’s available on Climate Explorer.
http://climexp.knmi.nl/selectfield_obs.cgi?someone@somewhere
These updates are not shown on the NODC’s Global Ocean Heat Content webpage:
http://www.nodc.noaa.gov/OC5/3M_HEAT_CONTENT/index.html
The updates also aren’t shown in the table of Global Analyzed Fields (ASCII files):
http://www.nodc.noaa.gov/cgi-bin/OC5/3M_HEAT/heatdata.pl?time_type=yearly700
But the single 22.4 MB dataset at the top of the table does contain the January through March and the April through June data, which were updated (added) on September 14, 2009:
ftp://ftp.nodc.noaa.gov/pub/data.nodc/woa/DATA_ANALYSIS/3M_HEAT_CONTENT/DATA/heat_3month/HC_0-700-3month.tar.gz
GLOBAL, HEMISPERIC, AND OCEAN BASIN GRAPHS
Global OHC has dropped back to its 2003 levels.
http://i34.tinypic.com/dev5ld.pngGlobal OHC
North Atlantic OHC is continuing to decline from its 2004 peak.
http://i36.tinypic.com/ddkeas.pngNorth Atlantic OHC
The recent drop in the South Atlantic OHC was sizeable, but not outside of the range of its normal variability.
http://i36.tinypic.com/2m5fais.pngSouth Atlantic OHC
And of the remaining OHC datasets, the only two that showed increases over the past six months are the South Pacific and Southern Ocean OHC
http://i35.tinypic.com/1ys415.pngSouth Pacific
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http://i38.tinypic.com/34f19p2.pngSouthern Ocean
Here are the remaining OHC subsets without commentary.
http://i38.tinypic.com/j79h1i.pngNorthern Hemisphere
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http://i35.tinypic.com/cqr13.pngSouthern Hemisphere
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http://i37.tinypic.com/2wlxz09.pngNorth Pacific
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http://i38.tinypic.com/6e0oax.pngIndian Ocean
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http://i38.tinypic.com/9u417d.pngArctic Ocean
CLOSING
Two earlier posts illustrated the impacts of natural variables on OHC. These included the ENSO-induced step changes in the OHC of numerous oceans and the effects of the NAO on high-latitude North Atlantic OHC:
1. ENSO Dominates NODC Ocean Heat Content (0-700 Meters) Data
2. North Atlantic Ocean Heat Content (0-700 Meters) Is Governed By Natural Variables
UPDATE (October 11, 2009):
Joe Romm of ClimateProgress noted in his reply to my comment on his post “Skeptical Science explains how we know global warming is happening: It’s the oceans, stupid!”, “Heck you don't even link to the article, which was "published 11 April 2009" (!!) whereas all the data you list is subsequent to that.”
For those who are incapable of clicking on the NODC links that I do provide in the following post and discovering that Levitus et al (2009) is linked there, here’s a direct link to the paper:
ftp://ftp.nodc.noaa.gov/pub/data.nodc/woa/PUBLICATIONS/grlheat08.pdf
Note: Joe’s closing clause in the quote above (“…whereas all the data you list is subsequent to that.”) is curious. It reflects his misunderstanding of what I presented or it reflects his attempt to misdirect his readers. Either way, he missed the mark. In the following post, I graphed the updated NODC data that’s available through KNMI. And that’s really all the post is about. It’s an update. Nothing more, nothing less. It includes all of the base Levitus et al (2009) data from January 1955 to December 2008 PLUS the recently released updated data from January 2009 through June 2009. Based on Joe Romm’s reasoning, we should disregard all climate data (SST, TLT, TSI, sea level, etc.) that are posted after the paper that introduces the dataset or maybe Joe is suggesting that all updates need to be peer reviewed.
##########
UPDATE 2 (October 11, 2009):
Those of you who read my comment at Joe Romm’s ClimateProgress…
http://climateprogress.org/2009/10/10/skeptical-science-global-warming-not-cooling-is-still-happening-ocean-heat-content/comment-page-1/#comment-155154
…will note that I referred to my earlier reply to dhogaza. Hmmm. Not too surprisingly, that comment never made it to the thread. Having posted comments there before and having had them deleted, I now keep copies. Here’s what I wrote:
8. Bob Tisdale says:
Your comment is awaiting moderation.
October 11, 2009 at 5:21 am
dhogaza: I presume your remark (3.) “Lessee… MIT-trained physicist vs. a high-school trained weather reader. I wonder which is more likely to understand the science” is to tallbloke (2.) above, in which he included a link to the WUWT post that I wrote. My original version is here:
http://bobtisdale.blogspot.com/%202009/%2010/%20update-of-nodc-levitus-et-al-2009-ohc.html
If not, disregard this comment.
That post uses NODC OHC data. As noted above, it shows a drop in OHC from January 2009 to June 2009. It was prepared as part of Levitus et al (2009):
ftp://ftp.nodc.noaa.gov/%20pub/%20data.nodc/%20woa/%20PUBLICATIONS/%20grlheat08.pdf
I don’t believe there’s a “high-school trained weather reader” among S. Levitus, J. I. Antonov, T. P. Boyer, R. A. Locarnini, H. E. Garcia, and A. V. Mishonov.
Their update is available here:
ftp://ftp.nodc.noaa.gov/%20pub/%20data.nodc/%20woa/%20DATA_ANALYSIS/%203M_HEAT_CONTENT/%20DATA/%20heat_3month/%20HC_0-700-3month.tar.gz
If you can’t work with the NODC’s Global Analyzed Fields above, the data is also available on a more user-friendly basis through the KNMI Climate Explorer:
http://climexp.knmi.nl/%20selectfield_obs.cgi?someone@somewhere
Simply scroll down to “Heat content” and select “1955-now: NODC 0-700m”.
If the drop in OHC concerns you, I suggest you contact Levitus et al. After you explain why you called them high school-trained weather readers, I’m sure they’ll be happy to answer your questions.
Have a nice day.
