by AMERICAN INSTITUTE OF BIOLOGICAL SCIENCES, February 2, 2017 in WUWT
A survey of 97 coastal ecosystem experts revealed impacts of climate disturbance but also instances of resilience in all ecosystem types evaluated and at multiple locations worldwide …
by JoNova, June 12, 2018 inJoNovaBlog
After half a billion million years of climate change, I’m shocked, shocked I tell you, that life on Earth (and specifically corals) have so many ways to cope with the climate changing. After all, it’s natural (if you are trained by Greenpeace) to assume that corals can only survive in a world with one constant stable temperature just like they never had.
One more tool in the coral-reef-workshop
Corals don’t just have a tool-box, they have a Home Depot Warehouse. h/t to GWPF
by Ross C.L. et al., 2017, June 10, 2018 in CO2Science
The global increase in the atmosphere’s CO2 content has been hypothesized to possess the potential to harm coral reefs directly. By inducing changes in ocean water chemistry that can lead to reductions in the calcium carbonate saturation state of seawater (Ω), it has been predicted that elevated levels of atmospheric CO2 may reduce rates of coral calcification, possibly leading to slower-growing — and, therefore, weaker — coral skeletons, and in some cases even death.
As we have previously pointed out on our website, however (see The End of the Ocean Acidification Scare for Corals and A Coral’s Biological Control of its Calcifying Medium to Favor Skeletal Growth), such projections often fail to account for the fact that coral calcification is a biologically mediated process, and that out in the real world, living organisms tend to find ways to meet and overcome the many challenges they face; and coral calcification in response to ocean acidification is no exception.
See also in French
by Prof. Dr. P. Berth, 5 juin 2018, in ScienceClimatEnergie.be
Voici quelques réflexions sur la théorie de l’acidification des océans. Selon cette théorie, le pH des océans diminuerait inlassablement, en raison du CO2 qui ne cesse de s’accumuler dans l’atmosphère.
• Les mesures directes de pH sont récentes et nous n’avons aucun recul. Selon les médias et les ONG écologistes, qui se basent sur le GIEC et sur certaines publications (e.g., Caldeira & Wickett 2003), le pH des océans aurait été de 8.25 en 1750. Cependant, il faut savoir que personne n’a jamais mesuré le pH des océans en 1750, puisque le concept de pH n’a été inventé qu’en 1909 (par le danois Søren P.L. Sørensen), et que les premiers appareils fiables pour mesurer le pH ne sont apparus qu’en 1924… Nous ne sommes donc pas certains de cette valeur de 8.25 pour 1750… La valeur de 8.25 est donc obtenue par des mesures indirectes et n’est donc pas certaine.
• A l’heure d’aujourd’hui, tous les pH sont possibles. Lorsqu’on dit que les océans actuels sont à un pH de 8.1, de quel océan parle-t-on? S’agit-il du pH moyen global? Si c’est de cela qu’on parle, quelle est l’incertitude sur la mesure? (i.e., l’écart-type?). Ceci n’est jamais indiqué. Il faut savoir que si l’on prend un jour de la semaine, tous les pH sont possibles dans les océans, comme l’illustre très bien la figure suivante.
by David Middleton, June 5, 2018 in WUWT
The Fable of Chicken Little of the Sea
Guest essay by David Middleton,
When if comes to debunking Gorebal Warming, Chicken Little of the Sea (“ocean acidification”) and other Warmunist myths, my favorite starting points are my old college textbooks.
Way back in the Pleistocene (spring semester 1979) in Marine Science I, our professor, Robert Radulski, assigned us The Oceans by Sverdrup (yes, that Sverdrup), Johnson and Fleming. Even though it was published in 1942, it was (and may still be) considered the definitive oceanography textbook. I looked up “ocean acidification” in the index… It wasn’t there.
The notion that CO2 partial pressure influences the pH of seawater isn’t a new concept, *surely* ocean acidification must have been mentioned in at least one of my college textbooks.
by Nicola Jones, January 11, 2011 in Nature
Corals around Japan are fleeing northwards, according to a new study. One type has been spotted ‘sprinting’ at 14 kilometres a year, thanks to a lift from ocean currents. That means ocean ecosystems could shift rapidly in the face of climate-change impacts such as warming seas, the authors say.
by University of Sydney, May 28, 2018 in ScienceDaily
Over millennia, the reef has adapted to sudden changes in environment by migrating across the sea floor as the oceans rose and fell.
The study published today in Nature Geoscience, led by University of Sydney’s Associate Professor Jody Webster, is the first of its kind to reconstruct the evolution of the reef over the past 30 millennia in response to major, abrupt environmental change.
The 10-year, multinational effort has shown the reef is more resilient to major environmental changes such as sea-level rise and sea-temperature change than previously thought but also showed a high sensitivity to increased sediment input and poor water quality. (…)
by K. Richard, May 24, 2018 in NoTricksZone
Scientists claim that the ocean’s global mean surface pH may have declined (i.e., became less alkaline and thus more “acidic”) by -0.08 in the last 265 years — from 8.13 during pre-industrial times to 8.05 today. That’s an overall, long-term pH change rate of -0.0003 per year.
By way of comparison, from one season to the next, or over the course of less than a year, pH levels naturally change by twice that amount (±0.15 pH units). On a per-decade scale, oceanic pH can naturally fluctuate up and down by up to 0.6 units within a span of a decade (as shown in red below).
by James Spry, April 19, 2018 in Climatism
A new study, published in Nature by serial reef alarmist Prof Terry Hughes, Director of the ARC Centre of Excellence for Coral Reef Studies at James Cook University, examines the link between the level of heat exposure from the 2015/16 super El Niño, “resulting in coral bleaching and ultimately coral death.“
See aslo here
by S. Xu et al., December 2017, in AGU1000Biogeosciences
Coral bleaching is becoming a serious issue for coral reefs under the stress of global warming. However, whether it has occurred in the past in times of thermal stress remains unclear. Moreover, an understanding of historic coral bleaching events would greatly improve our insight into the adaptive capabilities of corals under such stresses. It is known that Porites corals, a massive coral, have relatively high levels of symbiotic zooxanthellae and a strong thermal tolerance when compared with most other corals (and particularly branched corals). Thus, growth hiatuses and/or mortality surfaces of fossil Porites may be used to indicate past ecological or environmental stress events, such as severe bleaching. In this study, monthly geochemical and isotopic environmental proxies of four fossil Porites corals with well‐preserved growth hiatuses and mortality surfaces (aged 3,800–4,200 years before 2013 A.D.), collected from Wenchang fringing reef, Hainan Island, Northern South China Sea were analyzed. Specifically, the Sr/Ca, δ18O, and δ13C were measured with a monthly resolution for each sample.
by University of California – Irvine, April 26, 2018 in ScienceDaily
By taking a closer look, scientists find resilience in face of heat stress.
Coral reef bleaching is stark evidence of the damage being inflicted by global climate change on marine ecosystems, but a research team has found some cause for hope. While many corals are dying, others are showing resilience to increased sea surface temperatures, pointing to possible clues to the survival and recovery of these vitally important aquatic habitats (…)
See aslo here
by Kate Wheeling, April 19, 2018 in PacificStandard
Coral reefs are facing no shortage of threats including ocean acidification, overfishing, plastic pollution, and rising temperatures. Sea surface temperatures have been climbing on average for over a century, and ocean heat waves—which can trigger coral bleaching events—are becoming more common and severe. Scientists have long worried that as coral-killing spikes in temperature become more frequent, corals won’t have enough time to recover between bleaching events and will ultimately go extinct. But a new paper, published today in PLoS Genetics, suggests that corals might be able to adapt to another century of warming.
by A. Watts, March 2, 2018 in WUWT
WUWT readers may remember this story from last year, where Chris Turney, leader of the ill fated “ship of fools” Spirit of Mawson expedition that go stuck in Antarctic sea ice said: “Penguins Don’t Migrate, they’re dying!” and of course blamed the dreaded “climate change” as the reason. Of course three days later, Discover Magazine ran an article that suggested Turney was full of Penguin Poop.
Well, seems there’s a surplus of Penguins now, in a place nobody thought to look, there’s an extra 1.5 million Penguins. From Woods Hole Oceanographic Institute.
h/t to WUWT reader Lewis P. Buckingham.
by University of Birmingham, March 2, 2018, in WUWT
As the Earth’s surface and atmosphere warm, the amount of moisture – water vapour – in the atmosphere will increase. Understanding the size of this increase is important for predicting future climates as water vapour is a significant greenhouse gas. Atmospheric moisture content also influences the patterns and intensity of rainfall events.
The relationship between temperature and moisture content can be explored by the study of intervals in Earth’s history when climates where significantly warmer than those seen in modern times, which necessitates a method for estimating ancient atmospheric moisture content.