Tag: global warming

Sixty-Six Years of Island Shoreline Dynamics on Jaluit Atoll, Marshall Islands

According to a conventional narrative, tropical islands are eroding away due to rising seas and increasingly devastating storms. Not really, according to the recent work of Ford and Kench (2016).

Writing as background for their study, the two researchers state that low-lying reef islands are “considered highly vulnerable to the impacts of climate change,” where an “increased frequency and intensification of cyclones and eustatic sea-level rise [via global warming] are expected to accelerate shoreline erosion and destabilize reef islands.” However, they note that much remains to be learned about the drivers of shoreline dynamics on both short- and long-term time scales in order to properly project future changes in low-lying island development. And seeking to provide some of that knowledge, the pair of New Zealand researchers set out to examine historical changes in 87 islands found within the Jaluit Atoll (~6°N, 169.6°E), Republic of the Marshall Islands, over the period 1945-2010. During this time, the islands were subjected to ongoing sea level rise and the passage of a notable typhoon (Ophelia, in 1958), the latter of which caused severe damage with its >100 knot winds and abnormal wave heights.

So what did their examination reveal?

Analyses of aerial photographs and high-resolution satellite imagery indicated that the passage of Typhoon Ophelia caused a decrease in total island land area of approximately five percent, yet Ford and Kench write that “despite [this] significant typhoon-driven erosion and a relaxation period coincident with local sea-level rise, [the] islands have persisted and grown.” Between 1976 and 2006, for example, 73 out of the 87 islands increased in size, and by 2010, the total landmass of the islands had exceeded the pre-typhoon area by nearly 4 percent.

Such observations, in the words of Ford and Kench, suggest an “alternative trajectory” for future reef island development, and that trajectory is one of “continued island expansion rather than one of island withering.” And such expansion is not just limited to Jaluit Atoll, for according to Ford and Kench, “the observations of reef island growth on Jaluit coincident with sea level rise are broadly consistent with observations of reef islands made elsewhere in the Marshall Islands and Pacific (McLean and Kench, 2015).” Given as much, it would thus appear that low-lying islands are not as vulnerable to climate change as previously thought.

 

Reference

Ford, M.R. and Kench, P.S. 2016. Spatiotemporal variability of typhoon impacts and relaxation intervals on Jaluit Atoll, Marshall Islands. Geology 44: 159-162.

McLean, R.F. and Kench, P.S. 2015. Destruction or persistence of coral atoll islands in the face of 20th and 21st century sea level rise? WIRES Climate Change 6: 445-463.

Taming the Greenland Melting Global Warming Hype

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

There is a new paper generating some press attention (e.g. Chris Mooney at the Washington Post) that strongly suggests global warming is leading to specific changes in the atmospheric circulation over the Northern Hemisphere that is causing an enhancement of surface melting across Greenland—and of course, that this mechanism will make things even worse than expected into the future.

We are here to strongly suggest this is not the case.

The new paper is by a team of authors led by Marco Tedesco from Columbia University’s Lamont-Doherty Earth Observatory. The main gist of the paper is that Arctic sea ice loss as a result of human-caused global warming is causing the jet stream to slow down and become wigglier—with deeper north-south excursions that hang around longer.  This type of behavior is referred to as atmospheric “blocking.”

If this sounds familiar, it’s the same theoretical argument that is made to try to link wintertime “polar vortex” events (i.e., cold outbreaks) and blizzards to global warming. This argument which has been pretty well debunked, time and time again.

Well, at least it has as it concerns wintertime climate.

The twist of the new Tedesco and colleagues’ paper is that they’ve applied it to the summertime climate over Greenland. They argue that global warming is leading to an increase in blocking events over Greenland in the summer and that is causing warm air to be “locked” in place leading to enhanced surface melting there. Chris Mooney, who likes to promote climate alarm buzzwords, refers to this behavior as “weird.” And he describes the worrysome implications:

The key issue, then, is whether 2015 is a harbinger of a future in which the jet stream keeps sending Greenland atmospheric systems that drive major melt — and in turn, whether the Arctic amplification of climate change is driving this. If so, that could be a factor, not currently included in many climate change simulations, that would worsen the ice sheet’s melt, drive additional sea level rise and perhaps upend ocean currents due to large influxes of fresh water.

As proof that things were weird over Greenland in recent summers, Tedesco’s team offers up this figure in their paper:

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This chart (part of a multipanel figure) shows the time history of the North Atlantic Oscillation (NAO—a pattern of atmospheric variation over the North Atlantic) as red bars and something called the Greenland Blocking Index (GBI) as the black line, for the month of July during the period 1950-2015. The chart is meant to show that in recent years, the NAO has been very low with 2015 being “a new record low of -1.23 (since 1899),” and the GBI has been very high with the authors noting that “[c]oncurrently, the GBI also set a new record for the month of July [2015].” Clearly the evidence is showing that atmospheric blocking increasing over Greenland which fits nicely into the global warming/sea ice loss/wiggly jet stream theory.

So what’s our beef?

A couple of months ago, some of the same authors of the Tedesco paper (notably Ed Hanna) published a paper showing the history of the monthly GBI going back to 1851 (as opposed to 1950 as depicted in the Tedesco paper).

Here’s their GBI plotted for the month of July from 1851 to 2015:

This picture tells a completely different story. Instead of a long-term trend that could be related to anthropogenic global warming, what we see is large annual and multidecadal variability, with the end of the record not looking much different than say a period around 1880 and with the highest GBI occurring in 1918 (with 1919 coming in 2nd place). While this doesn’t conclusively demonstrate that the current rise in GBI is not related to jet stream changes induced by sea ice loss, it most certainly does demonstrate that global-warming induced sea ice loss is not a requirement for blocking events to occur over Greenland and that recent events are not  at all “weird.”  An equally plausible, if not much more plausible, expectation of future behavior is that this GBI highstand is part of multidecadal natural variability and will soon relax back towards normal values.  But such an explanation isn’t Post-worthy.

Another big problem with all the new hype is that history shows the current goings-on in Greenland to be irrelevant, because humans just can’t make it warm enough up there to melt all that much ice. For example, in 2013, Dorthe Dahl-Jensen and her colleagues published a paper in Nature detailing the history of the ice in Northwest Greenland during the beginning of the last interglacial, which included a 6,000 year period in which her ice core data showed averaged a whopping 6⁰C warmer in summer than the 20th century average. Greenland only lost around 30% of its ice with a heat load of (6 X 6000) 36,000 degree-summers. The best humans could ever hope to do with greenhouse gases is—very liberally—about 5 degrees for 500 summers, or (5 X 500) 2,500 degree-summers. In other words, the best we can do is 500/6000 times 30%, or a 2.5% of the ice, resulting in a grand total of seven inches of sea level rise over 500 years. That’s pretty much the death of the Greenland disaster story, despite every lame press release and hyped “news” article on it.

While you won’t find this kind of analysis elsewhere, we’re happy to do it here at Cato. 

References:

Dahl-Jensen, D., et al., 2013.  Eemian interglacial reconstructed from a Greenland folded ice core.  Nature 489, doi: 10.1038/nature11789.

Hanna, E., et al., 2016. Greenland Blocking Index 1851-2015: a regional climate change signal. International Journal of Climatology, doi: 10.1002/joc.4673.

Tedesco, M., et al., 2016. Arctic cut-off high drives the poleward shift of a new Greenland melting record. Nature Communications, DOI: 10.1038/ncomms11723, http://www.nature.com/ncomms/2016/160609/ncomms11723/full/ncomms11723.html

Do Negative Climate Impacts on Food Production Lead to Violence?

Introducing their important work, Buhaug et al. (2015) note that earlier research suggests there is “a correlational pattern between climate anomalies and violent conflict” due to “drought-induced agricultural shocks and adverse economic spillover effects as a key causal mechanism linking the two phenomena.” But is this really so?

Seeking an answer to this question, the four Norwegian researchers compared half a century of statistics on climate variability, food production and political violence across Sub-Saharan Africa, which effort, in their words, “offers the most precise and theoretically consistent empirical assessment to date of the purported indirect relationship.” And what did they thereby find?

Buhaug et al. report that their analysis “reveals a robust link between weather patterns and food production where more rainfall generally is associated with higher yields.” However, they also report that “the second step in the causal model is not supported,” noting that “agricultural output and violent conflict are only weakly and inconsistently connected, even in the specific contexts where production shocks are believed to have particularly devastating social consequences,” which fact leads them to suggest that “the wider socioeconomic and political context is much more important than drought and crop failures in explaining violent conflict in contemporary Africa.”

“Instead,” as they continue, “social protest and rebellion during times of food price spikes may be better understood as reactions to poor and unjust government policies, corruption, repression and market failure,” citing the studies of Bush (2010), Buhaug and Urdal (2013), Sneyd et al. (2013) and Chenoweth and Ulfelder (2015). In fact, they state that even the IPCC’s Fifth Assessment Report concludes “it is likely that socioeconomic and technological trends, including changes in institutions and policies, will remain a relatively stronger driver of food security over the next few decades than climate change,” citing Porter et al. (2014).”

And so we learn that alarmist claims of future climate-change-induced reductions in agricultural production that lead to social unrest and violent conflicts simply are not supported by real-world observations.

 

References

Buhaug, H., Benjaminsen, T.A., Sjaastad, E. and Theisen, O.M. 2015. Climate variability, food production shocks, and violent conflict in Sub-Saharan Africa. Environmental Research Letters 10: 10.1088/1748-9326/10/12/125015.

Buhaug, H. and Urdal, H. 2013. An urbanization bomb? Population growth and social disorder in cities. Global Environmental Change 23: 1-10.

Bush, R. 2010. Food riots: poverty, power and protest. Journal of Agrarian Change 10: 119-129.

Chenoweth, E. and Ulfelder, J. 2015. Can structural conditions explain the onset of nonviolent uprisings? Journal of Conflict Resolution 10.1177/0022002715576574.

Porter, J.R. et al. 2014. Food security and food production systems. Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Ed. C.B. Field et al. (Cambridge: Cambridge University Press) pp. 485-533.

Sneyd, I.Q., Legwegoh, A. and Fraser, E.D.G. 2013. Food riots: media perspectives on the causes of food protest in Africa. Food Security 5: 485-497.

You Ought to Have a Look: Ontario’s Energy Plan, Evidence-based Policy and a New Climate Sensitivity Estimate

You Ought to Have a Look is a feature from the Center for the Study of Science posted by Patrick J. Michaels and Paul C. (“Chip”) Knappenberger.  While this section will feature all of the areas of interest that we are emphasizing, the prominence of the climate issue is driving a tremendous amount of web traffic.  Here we post a few of the best in recent days, along with our color commentary.

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First up in this week’s edition of You Ought to Have a Look is an op-ed by Ross McKitrick (one-time Cato Adjunct who is now Chair of Energy, Ecology & Prosperity at the Frontier Centre for Public Policy and Economic Professor at the University of Guelph) who shreds the energy policy being forwarded by Kathleen Wynne, the Liberal Party Premier of Ontario. Wynne’s proposed plan—aimed to combat climate change—includes, among other things, a requirement that all homes eventually be heated by electricity (i.e., no natural gas, etc.).

McKitrick describes up the plan,

Around the time that today’s high-school students are readying to buy their first home, it will be illegal for builders to install heating systems that use fossil fuels, in particular natural gas. Having already tripled the price of power, Queen’s Park will make it all but mandatory to rely on electricity for heating.

There will be new mandates and subsidies for biofuels, electric buses for schools, extensive new bike lanes to accommodate all those bicycles Ontario commuters will be riding all winter, mandatory electric recharging stations on all new buildings, and many other Soviet-style command-and-control directives.

distills what’s wrong with it,

[E]ven if the…plan were to stop global warming in its tracks, the policies would do more economic harm than the averted climate change.

and, in inimitable Ross fashion, throws in this zinger,

The scheme is called the Climate Change Action Plan, or CCAP, but it would be more appropriately called the Climate Change Coercion Plan: the CCCP.

The entire op-ed appearing in the Financial Post is a must read.

Next up is a post at the blog IPKat (a U.K.-based Intellectual Property news blog) by Nicola Searle that provides an interesting review of a new book by Paul Cairney titled The Politics of Evidence-Based Policy Making.

Evidenced-based policy making (EBPM) is the idea that, well, policy should be based on some sort of evidence. But as Searle (and Cairney) point out, this is a lot more complicated than it seems. Searle eloquently describes the situation as: “Policymaking isn’t a Mondrian, it’s a Monet.”

Rather than the (utopian) linear view that “evidence” clearly informs the best “policy,” the situation is much more complex and involves uncertainties, interpretations, personal beliefs, outside pressures, policy goals, etc.

Searle provides this analogy:

As Cairney puts it, “in the real world, the evidence is contested, the policy process contains a large number of influential actors, and scientific evidence is one of many sources of information.” I’d described policy making in general as akin to an extended family choosing which film to watch. Uncle Alex campaigns for Barbarella, cousin Vic, holding the remote, decides you’re all watching Hulk until your sister Pat throws a tantrum unless you watch Frozen. You might consult the Rotten Tomatoes rating, but you’re convinced that critic from the New York Post is on the payroll of a major studios and the popular rating seems to have been spammed by bots… In the end you watch a Jude Law rom-com. And that’s the simplified version.

For more insight, check out Searle’s full post, or perhaps even Cairney’s book. This is a topic that is quite relevant to the subject of climate change policy (as well as a litany of policy that is rooted in U.S. Environmental ProtectionAgency “evidence”).

And finally, we’d be remiss if we didn’t draw attention to a new study appearing in the AGU journal Earth and Space Science by University College Dublin’s J. Ray Bates that finds that the equilibrium climate sensitivity—that is, the earth’s total surface temperature rise that results from a doubling of the atmospheric effective concentration of carbon dioxide—is “~1°C.”

Bates’ work is an update and extension of the methods and findings of (Cato Center for the Study of Science’s Distinguished Senior Fellow) Richard Lindzen and Yong-Sang Choi and represents another estimate of the climate sensitivity that falls well below the average of the climate models (3.2°C) used in the most recent IPCC report.  The lower the climate sensitivity to greenhouse gas increases, the lower the overall impacts when measured over comparative time-scales.

We’ve added the new Bates results to our lower-than-model climate sensitivity compilation (Figure 1).

Figure 1. Equilibrium climate sensitivity (ECS) estimates from new research beginning in 2011 (colored), compared with the assessed range given in the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) and the collection of climate models used in the IPCC AR5. The “likely” (greater than a 66% likelihood of occurrence) range in the IPCC Assessment is indicated by the gray bar. The arrows indicate the 5 to 95 percent confidence bounds for each estimate along with the best estimate (median of each probability density function; or the mean of multiple estimates; colored vertical line). The right-hand side of the IPCC AR5 range is actually the 90% upper bound (the IPCC does not actually state the value for the upper 95% confidence bound of their estimate). Ring et al. (2012) present four estimates of the climate sensitivity and the red box encompasses those estimates. Likewise, Bates (2016) presents eight estimates and the green box encompasses them. Spencer and Braswell (2013) produce a single ECS value best-matched to ocean heat content observations and internal radiative forcing.

 

Figure 1. Equilibrium climate sensitivity (ECS) estimates from new research beginning in 2011 (colored), compared with the assessed range given in the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) and the collection of climate models used in the IPCC AR5. The “likely” (greater than a 66% likelihood of occurrence) range in the IPCC Assessment is indicated by the gray bar. The arrows indicate the 5 to 95 percent confidence bounds for each estimate along with the best estimate (median of each probability density function; or the mean of multiple estimates; colored vertical line). The right-hand side of the IPCC AR5 range is actually the 90% upper bound (the IPCC does not actually state the value for the upper 95% confidence bound of their estimate). Ring et al. (2012) present four estimates of the climate sensitivity and the red box encompasses those estimates. Likewise, Bates (2016) presents eight estimates and the green box encompasses them. Spencer and Braswell (2013) produce a single ECS value best-matched to ocean heat content observations and internal radiative forcing.

As the Bates results are just-released, we await to see how they stand up to scrutiny (and the test of time).

The journal Earth and Space Science is open access, so everyone can go and have a look for themselves (although, fair warning, the article is very technical).

Release the Kraken

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

Making headlines today (like the one above) is a new paper by Zoë Doubleday and colleagues documenting an increase the population of cephalopods (octopuses, cuttlefish, and squid) over the past 61 years.  The authors, after assembling a data set of historical catch rates, note that this population increase, rather than being limited to a few localized areas, seems to be occurring globally.

End of analysis.

From then on its speculation.

And the authors speculate that human-caused climate change may be behind the robust cephalopod increase. After all, the authors reason, what else has had a consistent large-scale impact over the past six decades? No analysis relating temperature trends (spatially or temporally) to cephalopod trends, no examination of other patterns of climate change and cephalopod change, just speculation.  And a new global warming meme is born—“Swarms of octopus are taking over the oceans.”

There is an overwhelming tendency to relate global warming to all manner of bad things and a great hesitation to suggest a potential link when the outcome is seemingly beneficial. We refer to this as the global-warming-is-bad-for-good-and-good-for-bad phenomenon. It holds a great majority of the time.

In the case of octopuses, squids, and cuttlefish, the authors are a bit guarded as to their speculation of impact of the increase in cephalopod numbers—will they decimate their prey populations or will they themselves provide more prey to their predators? Apparently we’ll have to wait and see.

No doubt, the outcome will be a complex one as is the case behind the observed population increases. Depletion of fish stocks, a release of competitive pressure, and good old-fashioned natural environmental variability are also suggested as potential factors in the long-term population expansion. But complex situations don’t make for great scare stories. Global-warming-fueled bands of marauding octopuses and giant squid certainly do. 

Reference:

Doubleday, Z. A., et al., 2016. Global proliferation of cephalopods. Current Biology, 26, R387–R407.

Arctic Sea Ice Loss Not Leading to Colder Winters

Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”

Although it’s a favorite headline as people shiver during the coldest parts of the winter, global warming is almost assuredly not behind your suffering (the “warming” part of global warming should have clued you in on this).

But, some folks steadfastly prefer the point of view that all bad weather is caused by climate change.

Consider White House Office of Science and Technology Policy (OSTP) head John Holdren. During the depth of the January 2014 cold outbreak (and the height of the misery) that made “polar vortex” a household name, OSTP released a video featuring Holdren telling us that “the kind of extreme cold being experienced by much of the United States as we speak, is a pattern that we can expect to see with increasing frequency as global warming continues.” 

At the time we said “not so fast,” pointing out that there were as many (if not more) findings in the scientific literature that suggested that either a) no relationship exists between global warming and the weather patterns giving rise to mid-latitude cold outbreaks, or b) the opposite is the case (global warming should lead to fewer and milder cold air outbreaks).

The Competitive Enterprise Institute even went as far as to request a formal correction from the White House. The White House responded by saying that the video represented only Holdren’s “personal opinion” and thus no correction was necessary. CEI filed a FOIA request, and after some hemming and hawing, the White House OSTP finally, after a half-hearted search, produced some documents. Unhappy with this outcome, CEI challenged the effort and just this past Monday, a federal court, questioning whether the OSTP acted in “good faith,” granted CEI’s request for discovery.

In the meantime, the scientific literature on this issue continues to accumulate. When a study finds a link between human-caused global warming and winter misery, it makes headlines somewhere. When it doesn’t, that somewhere is usually reduced to here.

The Shallow Back Reef Environment of Ofu, American Samoa

Writing as background for their work, the six-member research team of Koweek et al. (2015) cite several concerns about the future of Earth’s corals that have been projected to result from the so-called twin evils of global warming and ocean acidification, including “coral bleaching (Glynn, 1993; Hughes et al., 2003; van Hooidonk et al., 2013), increased dissolution and bioerosion (Andersson and Gledhill, 2013; Dove et al., 2013; Reyes-Nivia et al., 2013), decreased biodiversity (Fabricius et al., 2011), and shifts toward algal-dominated reefs (Hoegh-Guldberg et al., 2007; Kroeker et al., 2010; 2013).” However, despite these concerns, which have captured the attention of scientists and policy makers for more than two decades now, such worries may well be overestimated and overplayed.

The reason for such growing optimism has to do with the corals themselves, which along with other marine organisms appear to have an inherent ability “of controlling their own biogeochemical environments.” Such biologically-mediated controls, if they are of sufficient magnitude, could potentially offset future changes in the marine environment brought about by rising atmospheric CO2 (projected ocean warming and pH decline). It is therefore of considerable importance for scientists to continue investigating these biological feedbacks in order to better ascertain the future of these precious marine species, for as noted by Koweek et al., “the paradigm of coral reefs as passive responders to their biogeochemical environments is rapidly changing.”

In further expanding the scientific knowledge on this important topic, the six American researchers set out to conduct a “short, high-resolution physical and biogeochemical pilot field study” on the back reefs of Ofu, American Samoa, where they measured a number of hydrodynamic and biogeochemical parameters there over a seven-day period in November, 2011. The specific study location was Pool 100 (14.185°S, 169.666°W), a shallow lagoon containing 85 coral species and various kinds of crustose coralline algae and non-calcifying algae. Koweek et al. selected Pool 100 because, as they state, shallow back reefs “commonly experience greater thermal and biogeochemical variability owing to a combination of coral community metabolism, environmental forcing, flow regime, and water depth.”

Results of their data collection and analysis revealed that temperatures within the shallow back reef environment were consistently 2-3°C warmer during the day than that observed in the offshore environment. In addition, and as expected, the ranges of the physical and biogeochemical parameters studied in Pool 100 greatly exceeded the variability observed in the open ocean. Inside Pool 100, the pH values fluctuated between a low of 7.80 and a high of 8.39 across the seven days of study, with daily ranges spanning between 0.5 and 0.6 of a unit (Figure 1). What is more, Koweek et al. report that the reef community in Pool 100 spent far more time outside of the offshore pH range than within it (pH values were between 8.0 and 8.2 during only 30 percent of the observational period, less than 8.0 for 34 percent of the time and greater than 8.2 for the remaining 36 percent of the observations). Additional measurements and calculations indicated that these fluctuations in pH were largely the product of community primary production and respiration, as well as tidal modulation and wave-driven flow.

Figure 1. Time series of pHT (top panel) and pCO2 (bottom panel) in Pool 100, Ofu, American Samoa from November 16-20, 2011. Vertical blue and orange lines show the occurrence of high and low tides, respectively. Gray vertical shading shows the period from sundown to sunrise. The different colored circles represent data that were collected from different locations in Pool 100 and the dashed horizontal black lines represent the mean value of each parameter in the offshore ocean. Adapted from Koweek et al. (2015).

Figure 1. Time series of pHT (top panel) and pCO2 (bottom panel) in Pool 100, Ofu, American Samoa from November 16-20, 2011. Vertical blue and orange lines show the occurrence of high and low tides, respectively. Gray vertical shading shows the period from sundown to sunrise. The different colored circles represent data that were collected from different locations in Pool 100 and the dashed horizontal black lines represent the mean value of each parameter in the offshore ocean. Adapted from Koweek et al. (2015).

Commenting on these and other of their findings, Koweek et al. write that “our measurements have provided insight into the physical–biogeochemical coupling on Ofu.” And that insight, they add, “suggests a significantly more nuanced view of the fate of coral reefs” than the demise of global reef systems that is traditionally forecast under the combined stresses of climate change and ocean acidification.

Indeed, if these ecosystems presently thrive under such variable (and more severe) environmental conditions than those predicted for the future—which conditions are largely derived and modulated by themselves—why wouldn’t they persist?

 

References

Andersson, A.J. and Gledhill, D. 2013. Ocean acidification and coral reefs: effects on breakdown, dissolution, and net ecosystem calcification. Annual Review of Marine Science 5: 321-348.

Dove, S.G., Kline, D.I., Pantos, O., Angly, F.E., Tyson, G.W. and Hoegh-Guldberg, O. 2013. Future reef decalcification under a business-as-usual CO2 emission scenario. Proceedings of the National Academy of Sciences, USA 110: 15342-15347.

Fabricius, K.E., Langdon, C., Uthicke, S., Humphrey, C., Noonan, S.H.C., De’ath, G., Okazaki, R., Muehllehner, N., Glas, M.S. and Lough, J.M. 2011. Losers and winners in coral reefs acclimatized to elevated carbon dioxide concentrations. Nature Climate Change 1: 165-169.

Glynn, P.W. 1993. Coral reef bleaching: ecological perspectives. Coral Reefs 12: 1-17.

Hoegh-Guldberg, O., Mumby, P.J., Hooten, A.J., Steneck, R.S., Greenfield, P., Gomez, E., Harvell, C.D., Sale, P.F., Edwards, A.J., Caldeira, K., Knowlton, N., Eakin, C.M., Iglesias-Prieto, R., Muthiga, N., Bradbury, R.H., Dubi, A. and Hatziolos, M.E. 2007. Coral reefs under rapid climate change and ocean acidification. Science 318: 1737-1742.

Hughes, T.P., Baird, A.H., Bellwood, D.R., Card, M., Connolly, S.R., Folke, C., Grosberg, R., Hoegh-Guldberg, O., Jackson, J.B.C., Kleypas, J.A., Lough, J.M., Marshall, P., Nystrom, M., Palumbi, S.R., Pandolfi, J.M., Rosen, B. and Roughgarden, J. 2003. Climate change, human impacts, and the resilience of coral reefs. Science 301: 929-933.

Koweek, D.A., Dunbar, R.B., Monismith, S.G., Mucciarone, D.A., Woodson, C.B. and Samuel, L. 2015. High-resolution physical and biogeochemical variability from a shallow back reef on Ofu, American Samoa: an end-member perspective. Coral Reefs 34: 979-991.

Kroeker, K.J., Kordas, R.L., Crim, R.N. and Singh, G.G. 2010. Meta-analysis reveals negative yet variable effects of ocean acidification on marine organisms. Ecology Letters 13: 1419-1434.

Kroeker, K.J., Kordas, R.L., Crim, R.N., Hendriks, I.E., Ramajo, L., Singh, G.S., Duarte, C.M. and Gattuso, J.-P. 2013. Impacts of ocean acidification on marine organisms: quantifying sensitivities and interaction with warming. Global Change Biology 19: 1884-1896.

Reyes-Nivia, C., Diaz-Pulido, G., Kline, D.I., Hoegh-Guldberg, O. and Dove, S.G. 2013. Ocean acidification and warming scenarios increase microbioerosion of coral skeletons. Global Change Biology 19: 1919-1929.

van Hooidonk, R., Maynard, J.A. and Planes, S. 2013. Temporary refugia for coral reefs in a warming world. Nature Climate Change 3: 508-511.

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