an update to yet another gem of denier BS associated with ocean acidification: earlier related posts are added at the bottom (of this post):
in this piece of denier crapola, the much hyped claim was that NOAA scientists had purposely omitted some 80 years of data... and in so doing, fraudulently arrived at their results/analysis that speak to levels of existing ocean acidification at regional levels across the earth's oceans. In the particular denier fallacious attack, a graphic localized to Hawaii was targeted.
in my initial reply I spoke to the data quality aspect relative to ~1990 where ocean community scientists shifted away from using data associated with the less accurate "ph bulb measurement" technique in favour of more accurate data associated with alternate and more enhanced measuring techniques based on, for example, alkalinity and DIC (Dissolved Inorganic Carbon) process methods to arrive at ocean pH. I also highlighted the fact that the denier attacking the NOAA scientists and their analysis was fully aware of why they chose the data they did... in fact, as I wrote, the denier spoke to it himself in his own blog writings... which as I also pointed out... was conveniently left out of the narrative that got mega-hyped across the denialsphere!
of course, the key in the NOAA scientists analysis is that it has a regional focus... analyze data per regional areas and determine pH, per regional area, accordingly.
One point I didn't highlight was the additional nonsensical approach the denier took in presuming to calculate an ocean-wide pH trend level... by presuming to just calculate a "global mean pH" for each year without factoring such things as the regional variability in geographic and seasonal patterns in ocean pH. A somewhat analogous/bogus example that illustrates this Big Time Denier Fail would be for someone to attempt to calculate a global temperature figure/trend based on absolute temperature rather than calculating anomalies and gridding quality checked data.
the related article/paper as published within the journal 'Oceanography'... inclusive of detailed chemistry and a related (data sourced) table of "
average concentrations of carbon system parameters and temperature-and-salinity values for surface waters of the major ocean basins based on the global ocean data analysis project data set."
this 'event' has certainly reached the upper echelon of denier hype! What's lost in any denier articles is the, in my understanding, the reason the targeted data begins around 1990 is that it coincides with the availability of more reliable data based on alkalinity and DIC (Dissolved Inorganic Carbon) process methods to arrive at pH... that the 'ocean community' began to rely less upon the older dated 'pH bulb meters' and moved to rely upon other more reliable methods to determine ocean pH.
your suggestion of 'Wallace being a dick' is spot on if you factor he's knowingly manufactured the whole event... in my view, his own blog writing speaks to exactly that. In that regard,
Wallace closes a Jan 2014 blog entry with the following passage:
It’s possible that much or all of this post-1988 data was not recorded using glass electrode pH meters. As my earlier posts document, the ocean science community has moved away from glass electrodes starting about 1989, although other parts of the water scientific community and other industries continue to use glass electrode pH meters for all ranges of ionic strengths.
of course, none of the articles I perused across the typical denier blogs have Wallace including this little ditty in his article - go figure!
I expect once the holiday break settles out, a formal response will be forthcoming... perhaps even from NOAA directly. In any case, just as stands, it's quite telling to realize the dual standard at play here. On one level we have the denier community purposely cherry-picking ~15-18 years as the reference period to determine surface temperature... apparently, a somewhat relative time-frame for more reliable ocean pH data is verboten!