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Wednesday, October 22, 2014

Anthony Watts (and others) fail ocean chemistry - woefully!

Sou | 12:59 AM Go to the first of 17 comments. Add a comment

I noticed Anthony Watts retweeted something the other day and wondered if he'd be dumb enough to copy and paste it at WUWT.

He is and he did.

Anthony loudly proclaims his ignorance of basic physics and chemistry, with the headline:

New paper debunks ‘ocean acidification’ scare, finds warming increases pH

He copied his article (archived here) from another denier blog that often makes scientific bloopers, the Hockeyschtick.


This leads me to the twitter exchange I saw. It went like this. First up Marc Morano tweeted about the HockeySchick dud article, and Seth Borenstein replied:
.
Then the HockeySchtick mumbled something about Henry's Law and Anthony Watts showed his profound ignorance.

Sheesh! And some people seriously think they'll learn science from science deniers?

I know I don't need to explain the multiple bloopers to you, but I will anyway, because you never know when a stray WUWT reader will happen here by accident or good fortune. It's really quite simple.


Freshwater lakes aren't the ocean


The first blooper is that the paper in question was about a freshwater lake. That can't be used to "debunk" anything about ocean acidification. The chemistry is quite different in freshwater to sea water. (The bonus blooper here was that the paper doesn't appear to have been about CO2, in the main.)


Solubility of a gas in a liquid


The second blooper relates to Anthony Watts not understanding solubility of a gas in a liquid. The amount of dissolved gas in a body of water is, in part, dependent on partial pressure and temperature. In an ideal situation, this is described in Henry's Law:

"At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid."

Or, to put it another way, as temperature increases, to maintain the same amount of the gas dissolve in the liquid, the partial pressure of the gas must also increase.

Now the ocean doesn't behave as water would in a closed system in a laboratory where the temperature and pressure can be controlled. There are lots of other things happening, like waves and currents and wind. Just the same, if CO2 wasn't increasing and the oceans were warming, they'd emit CO2. That's what happened in the past when ice ages ended. The oceans warmed up, released CO2 which caused the earth (and oceans) to warm up even more. Eventually a new equilibrium was reached.

Today we're increasing the partial pressure of CO2 faster than the oceans can keep up with. So while the oceans are warming, they continue to absorb CO2. A lot of what we're pouring into the air is dissolving in the oceans.


Ocean acidification is chemistry


The third blooper relates to Anthony confusing the chemistry of ocean acidification with the solubility of gaseous CO2 in sea water. Dissolved CO2 reacts chemically with water. It's the chemical reactions that cause the pH to drop. Seth Borenstein was correct and Anthony Watts is a goose.

The equations look like this diagram attributed to the University of Maryland (I couldn't find the original):



Here's another explanation and diagram from NOAA's PMEL Carbon Program:



This process has made the sea 30 percent more acidic than it was before industrialisation. That's affecting the organisms that live in the sea, some more than others.




There is a lake in Japan


The paper that HockeySchtick found was published in Climate of the Past, and is open access. It had the title:

Water pH and temperature in Lake Biwa from MBT'/CBT indices during the last 280 000 years

The abstract (my paras):
We generated a 280 000 yr record of water pH and temperature in Lake Biwa, central Japan, by analysing the methylation index (MBT′) and cyclisation ratio (CBT) of branched tetraethers in sediments from piston and borehole cores.
Our aim was to understand the responses of precipitation and air temperature in central Japan to the East Asian monsoon variability on orbital timescales.
Because the water pH in Lake Biwa is determined by phosphorus and alkali cation inputs, the record of water pH should indicate the changes in precipitation and temperature in central Japan. Comparison with a pollen assemblage in a Lake Biwa core suggests that lake water pH was determined by summer temperature in the low-eccentricity period before 55 ka, while it was determined by summer precipitation in the high-eccentricity period after 55 ka. From 130 to 55 ka, the variation in lake pH (summer precipitation) lagged behind that in summer temperature by several thousand years.
This perspective is consistent with the conclusions of previous studies (Igarashi and Oba, 2006; Yamamoto, 2009), in that the temperature variation preceded the precipitation variation in central Japan.

Yes indeed. I can see you nodding your head and saying to yourself "Hmm, makes sense". Do you know the chemistry and biology involved in analysing the methylation index and cyclisation ratio of branched tetraethers in sediments from piston and borehole cores? If so, I'll let you explain it :)

I can but barely follow the science described in the paper. I'd have to do quite a bit of reading and go back and relearn a lot of chemistry, biochemistry and biology to understand half of what the paper is about. The introduction provides some context for the research (my paras):
The East Asian monsoon governs the climate of East Asia (Wang et al., 2003), and East Asian monsoon variability on orbital timescales has been the topic of many studies, which have revealed that it has responded to precession; however, the timing of monsoon variability continues to be debated.
Kutzbach (1981) hypothesised that the Asian monsoon responds to insolation changes at low latitudes, which are regulated by precession. According to this hypothesis, the summer monsoon is maximal when Northern Hemisphere summer insolation is maximal in the precession cycle. Indeed, oxygen isotope records from cave stalagmites in China have demonstrated that summer monsoon variability was pronounced at the precession cycle and maximal at the July–August precession (e.g. Wang et al., 2001, 2008; Yuan et al., 2004; Dykoski et al., 2005).
However, some proxy records are not consistent with this hypothesis. Clemens and Prell (2003) reported that Indian summer monsoon variability showed both precession and obliquity cycles and was maximal at the November perihelion on the precession band.
The pollen record in the north-western Pacific off central Japan shows that the East Asian monsoon has been strongest at the October–November perihelion in a precession cycle (Heusser and Morley, 1985; Igarashi and Oba, 2006). Thus, the conclusions have varied according to the proxy record used. 
Since the conclusions of different studies varied, the scientists embarked on their own research. They described the factors affecting pH of lakes in general as:
  1. the geology of the drainage basin,
  2. evaporation, 
  3. the photosynthesis of phytoplankton and submerged plants, 
  4. the respiration of organisms, and 
  5. the decomposition of organic matter by microbes. 

The paper goes into a lot of detail describing the different factors determining pH in this particular lake. From that information, they then worked out how pH was determined in different orbital periods, looking back over the past 280,000 years. If you are tuned into the subject, you'll probably find the details interesting reading. It really didn't seem to be about atmospheric CO2, or not directly anyway. There was some discussion of how today, in the particular lake being studied, Lake Biwa, photosynthesis is controlled mainly by the phosphorus concentration. The pH increased by more than 1 from the 1960s to the 1970s, from agricultural runoff after rain, which is rather a lot. (Fresh water doesn't have the buffering capacity of sea water.) From that they deduced that "summer precipitation in the watershed is a factor that controls photosynthesis and, consequently, the pH of the lake water". Then they discussed the effect of chemical weathering and more. It was highly technical and I won't try to explain the ins and outs, not least because I don't understand it.

The upshot is that the scientists suggested that:
Lake water pH was determined by summer temperature in low-eccentricity periods, while it was determined by summer precipitation in high-eccentricity periods. From 130 to 55 ka, variation in lake pH (summer precipitation) lagged behind that in summer temperature by several thousand years. Thaumarchaeotal production was enhanced in specific periods in interglacials. 

The Thaumarchaeota (from the Greek 'thaumas', meaning wonder) are a phylum of the Archaea proposed in 2008 after the genome of Cenarchaeum symbiosum was sequenced and found to differ significantly from other members of the hyperthermophilic phylum Crenarchaeota.[1][2] Three described species in addition to C. symbosium are Nitrosopumilus maritimus, Nitrososphaera viennensis, and Nitrososphaera gargensis.[2] All organisms of this lineage thus far identified are chemolithoautotrophic ammonia-oxidizers and may play important roles in biogeochemical cycles, such as the nitrogen cycle and the carbon cycle. 
Well, there you go. You (might have) learnt something today :)

From the WUWT comments


It's interesting to see if WUWT readers are more scientifically literate than Anthony Watts, the HockeySchtick and Marc Morano. Many of them are, you'll be pleased to learn. Too many are not. First some of the crass and ignorant comments.

Eric Worrall 
October 21, 2014 at 12:40 am
The ocean acidification scare was always going to be a crock. The outgassing from any warming of the ocean utterly swamps any uptake due to higher CO2 concentrations in the air. Nice to see some measurements which confirm this basic science.

Konrad won't accept science. Not now. Not ever.
October 21, 2014 at 2:36 am
Sorry Ferdinand, it just won’t do. It is as Viscount Monckton wrote – “ocean “acidification” is the last refuge of the global warming scoundrel.”
Why “acidification” as opposed to the more accurate “de-alkinisation”? Because “acid” sounds ever so much scary, doesn’t it? You and yours chose propaganda over science and were fool enough to do so while the Internet kept a permanent record.
There can be no forgiveness. Not now. Not ever.


There were a few people who made informed comments:

James
October 21, 2014 at 12:43 am
And what about the partial pressure component of Henry’s Law?
At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.”
The increases in partial pressure is a lot more than the temperature rise. The overall affect will be decrease in pH in Oceans. 

Jerker Andersson  (extract)
October 21, 2014 at 1:01 am
I think we should not mix up what has happened during the last 280k years with what is happening now when it comes to CO2. While Henrys law says that a warm oceans can disolve less CO2 than a cold oceans it also says that if you increase the partial pressure of the CO2 in the atmosphere there will be an imbalance and the iceans will start to disolve CO2 from the atmosphere until a new equilibrium is reached. When that has happened both the oceans and the atmosphere has a higher amount of CO2.

Mike Jonas
October 21, 2014 at 1:17 am
Jerker Andersson is right. In the past, as stated in the paper, atmospheric CO2 and its balance with the oceans was all natural and the warmer = more alkaline relationship applied. But today, atmospheric CO2 has been increased by fossil fuel usage etc, and that pattern has been disturbed. It does seem clear that ocean pH has decreased very slightly in recent years, and that man-made CO2 is one of the factors. Doesn’t justify alarmism, though. 
Mostlyharmless  
October 21, 2014 at 1:59 am
“Not so fast…” indeed – claiming that a study of pH changes in a freshwater lake proves or disproves anything at all wrt so-called “ocean acidification” is very reminiscent of warmist “tricks”, and has no place on a truly sceptical blog. Citing Henry’s law is also invalid, as sea-water chemistry is complex, and pH is heavily buffered.

tty
October 21, 2014 at 3:00 am
Unfortunately this has absolutely no relevance for “ocean acidification”. The chemistry of freshwater lakes is very different from oceans.


Ajioka, T., M. Yamamoto, K. Takemura, A. Hayashida, and H. Kitagawa. "Water pH and temperature in Lake Biwa from MBT'/CBT indices during the last 280 000 years." Climate of the Past 10, no. 5 (2014): 1843-1855. doi:10.5194/cp-10-1843-2014

17 comments:

Phil Clarke said...

Off Topic ...

The Death of Irony

In a piece tagged Climate Ugliness Watts and his moderators allow commenters to unleash some of the ugliest, most blatent and disgusting examples of misogyny one could imagine, directed against Naomi Oreskes. Too horrible to reproduce.

I only hope we are witnessing the endgame for this vile blog.

Sou said...

I saw that but have been flat out on other stuff the last few days and didn't get to cover it. I did check the person who wrote the main article, Ron Arnold. I gather he's a professional anti-environmentalist, who probably won't rest until the last tree on earth is felled and all species of animals have become extinct.

Anthony is very inconsistent, sticking up for someone (Fred Singer) who reportedly denied the health effects from second hand smoke. He is usually strongly anti-tobacco because it took his parents.

With Anthony, being anti-climate and anti-women trumps being anti-tobacco.

Arthur said...

I notice Judith Curry has an attack on Naomi Oreskes today also. Some coordination program going on behind the scenes? I wasn't aware of anything special from Oreskes recently?

metzomagic said...

I didn't get a chance to read through the comments at WUWT, but another thing they don't seem to 'get' about PH is that the scale is logarithmic. Typical denier comment: "So what if the PH changed from 8.2 to 8.1, what harm could that possibly cause?" when in fact it is a ~30% change (in H+ ion concentration), as Sou mentioned above :-(

Lionel A said...

They probably have only just discovered Oreskes latest book, with Erik M Conway, 'The Collapse of Western Civilization: A View from the Future' after all it was published only three months ago.

After all facing up to the truth is not a strong-point of the audience Watts and now increasingly Curry, given Curry's recent article in the WSJ, which annoyingly is behind a pay-wall. But use a phrase you can see to Google and you might get lucky.

Should we let such propaganda, which should be available to all to dissect in the public interest, hide behind a paywall? Should the copyright of such be respected? Yes I know that scientific papers often require a subscription to the journal but then the financing of these two disparate types of publication is asymmetric, in favour of the propagandists.

Lionel A said...

"...but another thing they don't seem to 'get' about PH is that the scale is logarithmic..."

As is water vapour capacity of air with temperature rise IIRC.

Anonymous said...

Lake != Ocean btw.

dhogaza said...

Ron Arnold is the founder of the "Wise Use Movement" and has had tremendous influence on conservatives who oppose conservation and environmental protections on [US] federal lands.

dbostrom said...

“de-alkinisation”

Amazing to see these folks trying to unwind and reweave semantics by coining horribly awkward terms involving hyphens, just to keep their fear at bay.

Warming: de-cooling.
Cooling: en-thermalizing.
Dying: de-vivifiying.

dbostrom said...

Oops. Cooling is "de-thermalizing," or for the layman "de-warming." Sorry!

luminous beauty said...

Not sure what you're saying here, but the log of vapor capacity varies with temperature. I.e., vapor capacity varies as an exponential function of temperature.

Rattus Norvegicus said...

And the damage done by that movement is still reverberating. For example HR 1526, which would restore the strip-mining of our forests by getting rid of NEPA for logging projects, or the movement which is strangely popular in the west to sell off public lands.

Bernard J. said...

These days every one of the posts at WUWT simply add to the fact that humans as a species are voting to become an evolutionary dead-end.

It's not as if many of us here and elsewhere have not posted about this (and everything else) repeatedly on Watts' site - and elsewhere - and meticulously explained the science to them, including links to reference material. Not only are the WUWTians ignorant, they are recalcitrantly and irredeemably so. This intellectual inertia extends all the way to the top of most nations' governments, with little sign that there's any chance of an 11th hour reprieve.

The only glimmer of hope that I see is that there is a gathering of momentum with some institutions committing to divestment, and others smelling the possibility of profit in renewables. If only it's not too little, too late.

This cognitive scotoma in humans is a fundamental bug in a generally sophisticated design. It reminds me of the Mars Climate Orbiter which, in 1999, saw state of the art technology plummet into the implacably unweilding fact of the hard Martian surface for want of a little basic understanding and mental flexibility.

We seem determine to replicate that example here on Earth, with the breaking of our ecosphere replacing the surface of Mars.

Vale Homo sapiens. You were an interesting little orbiter whilst it lasted.

Phil Clarke said...

Anthony is very inconsistent, sticking up for someone (Fred Singer) who reportedly denied the health effects from second hand smoke.

Singer's denial of secondhand smoke effects on behalf of the tobacco industry is well-documented (see e.g.his wiki entry, DesmogBlog, Sourcewatch, The tobacco papers).

As is his denial of the effects of CFCs on Ozone, and objections to the Montreal protocols on behalf of the Big Chem.

He was also shamefully complicit in the re-writing of Roger Revelle's late work.

http://rabett.blogspot.co.uk/2007/04/if-richard-lindzen-shows-up-at-your.html

Other than that, a stand-up guy.

I'd be surprised if the admirable Mr Mashey does not have a substantial dossier on S. Fred.

Lionel A said...

Oops. Yes sorry mixed up my functions Log, Log e and e.

Anonymous said...

Surely, De-Basing... (snicker)

R the anon

Anthony David said...

That's what happened in the past when ice ages ended. The oceans warmed up, released CO2 which caused the earth (and oceans) to warm up even more. Eventually a new equilibrium was reached.

It is a little more complicated than that. Henry's Law cannot account for the rapid rise of CO2 during deglaciations, there was not enough carbon stored in the surface ocean. Current research points to a major contribution from the Southern Ocean upwelling due to Eckman pumping as the sea ice retreated south. Another source of CO2 is thought to be increase carbonate precipitation in the tropics as the continental shelves were flooded.