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What The IPCC Said About Ocean Temperatures In 1990

April 25, 2015
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By Paul Homewood 


It’s amazing what you find from the 1990 IPCC Report when you look. These were the days, of course, before the IPCC became fully politicised.

In their section on sea temperatures, they discuss the big cooling of the Atlantic in the 1960’s and 70’s.




They continue:




What they are talking about is the immense heat storing capacity of the oceans, and how changes in circulation patterns can have a significant effect on climate, maybe decades or even centuries later.

The ability of CO2 to affect ocean temperatures is tiny in comparison.

Unfortunately, many scientists today find it easier, and more profitable, to blame all changes on CO2 and ignore all of the natural processes taking place.

  1. A C Osborn permalink
    April 25, 2015 6:43 pm

    Paul, would you be interested in helping the GWFP with an Enquiry in to the state of the current Temperature datasets?

    Cheifio has an interesting article on some of those natural effects that are deliberately being ignored here
    and on the state of Climate Science compared to what it should be here

  2. April 25, 2015 7:15 pm

    What Gouretski et al (2012) said about ocean temperatures in recent times (“…large regions of the oceans have experienced cooling since the 1990s”):

    Click to access NearSurfaceOceanWarming1900.pdf

    “[T]he first decade of the 21st century (2001–2010) was not uniformly warmer than
    previous decades. Before about 1920, the global ocean was almost everywhere colder than the reference decade of 2001–2010. After 1920, several regions of the global ocean were warmer than the reference decade [2001-2010].”

    “[A] rather abrupt cooling since the end of 1990s both in the East Pacific (connected to the weakening of El Nino and the shift to the negative phase of the Pacific Decadal Oscillation) and in the Southern Ocean [see also Knight et al., 2009] may have contributed to a flattening of the global temperature anomaly series after about 2000. The flattening can be clearly seen in Figure 2a.”

    “Decadal mean SST and 0–20 m layer anomalies calculated relative to the reference decade 2001–2010 give evidence of the general warming of the global ocean since 1900. However, large regions of the oceans have experienced cooling since the 1990s. Whereas cooling in the tropical Eastern Pacific ocean is associated with frequent La Nina events in the past decade, the cause of the cooling within the Southern Ocean remains unknown.”

    “Extension of the analysis back to the beginning of the 20th century reveals evolution of the temperature average over the upper 400 meters that is similar to the near-surface time series, with two periods of warming separated by a period between about 1945 and 1970 when the oceans cooled slightly.”
    Also, notice how rapidly the 0-20 m layer of the oceans heated up during the 1900 to 1945 period (below link) according to Gouretski et al (2012), when CO2 levels only rose from about 300 ppm to 310 ppm. Since 1945, when CO2 levels have exploded up to 400 ppm, ocean heat content has simultaneously risen by less than half the 1900 to 1945 rate:

    Now notice how closely the 20th century ocean heat content trends (above link) match total solar irradiance trends (below link) for the 20th century….with even the 1950s to 1970s cooling accounted for:

  3. April 25, 2015 11:37 pm

    Thanks, Paul.
    Those were the days, my friend, we thought they’d never end.
    Now it is politics and money, not much space left for science, I’m afraid. ;-(

  4. April 26, 2015 4:28 pm

    Reblogged this on clever nicknames.

  5. April 27, 2015 6:33 pm

    There are many who does not agree with IPCC and its “consensus” thesis. While most of the scientists and climatologists support it, there are also voices which contradict the conclusions of IPCC. The most important document in this regard is the “Oregon Petition” of 1998, signed by 17,000 scientists who were protesting against the Kyoto Agreement. The petition requested the acknowledgement of the following statement:
    “There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth’s atmosphere and disruption of the Earth’s climate. Moreover, there is substantial scientific evidence that increases in atmospheric carbon dioxide produce many beneficial effects upon the natural plant and animal environments of the Earth. ”
    Neither the IPCC nor the Oregon Petition’s claims are satisfactory enough. They don’t reflect a correct assessment and analysis of the Earth’s climate during the last 150 years.
    I’ve read more on this topic on There is a thesis called Booklet on Naval War changes Climate, which offered me answers to some of my questions.


  1. What The IPCC Said About Ocean Temperatures In 1990. “It’s amazing what you find from the 1990 IPCC Report when you look. These were the days, of course, before the IPCC became fully politicised.” | Official site of DJ Michael Heath

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