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Reefable
08/27/2017, 12:55 PM
Wow just wow..This documentary on Netflix is alarming eye opener. To realize that we are in a state of loosing the entire coral population of the world in the next 30 years is more than depression. I really hope they recover and adapt to the global warming. Today after watching the documentary I feel proud of myself and all the reefers who are trying to keep these extinct species alive and healthy in their individual tanks. I couldn't stop myself sharing this today. Yep this documentary has changed the way I look and think of corals. It has brought me more closer to my tank than ever.


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el chupacabra
09/02/2017, 06:08 PM
I too didnt realize what a sad state coral reefs were in till watching this. I first heard of this film at macna this year during Walt Smith's talk. Walt Smith gave a talk about coral farming in the south pacific, he's farming coral (ADE project) to rebuild the reefs and supply our hobby. He showed a video of the efforts to rebuild the reefs but for the life of me I cant find it. Supposedly it's on itunes but I cant even find the name of the video on google.

If you like documentaries exposing shocking stuff most people never knew about, check out Virunga. To me it's one of the best docs made. It exposes how first world corporations & countries intentionally start civil wars overseas to acquire resources. It takes place in the Congo where people give their lives to protect the gorrilla. Or check out the horror documentary Crude right before you go to bed. There's images from that Ill never be able to forget. I think these are both on netflix.

Aresangel
09/02/2017, 09:05 PM
It is a bit over dramatized with entire population. It is large quantities in local areas. Some species may go extinct yes, but a bleaching event does not mean the corals do not grow back with time. Every year there is a reported bleaching event especially in the barrier reef with climate change and the southern ocean oscillation currents. The documentary is well done and went through great lengths to document the bleaching event. Recovery should be a follow up documentary to show the state months and years after these major events to give hope (if there is any to give).

That being said I will be showing that documentary to my high school oceanography class Monday to peak their interests in conservation efforts and the importance of coral reefs.


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el chupacabra
09/03/2017, 02:18 PM
I always thought this kind of stuff was under dramatized. For one, we are kind of focused on the loss of corals. But what about all the other forms of life we dont really see or care about much? Such as sponges, arthropods, molluscs - any number of the thousands of species that are dying or going extinct underneath the dying reefs. Meanwhile we are replanting a few sps species and acting like this will rebuild the reef to its former glory. When it comes to the environment things really are pretty dire. Many people dont know that in the past 15 years roughly half of the amphibian species in the western hemisphere have gone extinct (who noticed?).

In the film it's not just documenting 'bleaching', but the process of, bleaching, and then [permanent] death, hence pointing out how algae only grows on coral thats completely dead. I though their primary point was that corals aren't coming back from this. They aren't evolving fast enough.

Reefable
09/03/2017, 09:39 PM
Great input guys. I agree with El's last post though the fact that algae has grown over those thick sps colonies is an indication of something serious if not permanent death. The fact that alarms is in 3 months the entire coral reef was dead brought to bare bones....and this is just a beginning i am afraid off. There are so many other ecosystems which could endanger so many species unheard off...lets hope for the best...


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Frank H
09/16/2017, 07:06 PM
Coral reefs grow in the warmest waters found in the ocean. The majority of water is much cooler than these tropical environments. If the water is warming too much, wouldnt this make other areas potentially reef ready?

What about this 600 mile reef they found last year? https://www.theatlantic.com/science/archive/2016/04/scientists-discover-a-new-coral-reef-at-the-amazons-mouth/479259/

While Chasing Coral was interesting I feel it was more geared to scare the viewer into making changes to fight global warming.

GQsmooth
09/20/2017, 09:11 AM
^^That's the point. The world should be making a shift already.

All in all, it was an interesting watch, but the guy getting overly emotional over the bleaching was a bit much.:crazy1:

karimwassef
09/20/2017, 12:12 PM
Temperature is not as impactful as CO2 acidification.

Walt Smith
11/13/2017, 07:05 PM
Hi El, and others,
you can find the video you are talking about on www.adeproject.org on the "what is ADE" page. better get some popcorn or a glass of wine ... it is 24 minutes long. hope you enjoy!
Walt

JPMagyar
12/03/2017, 11:54 AM
Hopefully mother nature will have something to add to the conversation in years to come.


Connectivity and systemic resilience of the Great Barrier Reef (http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.2003355)

Twinfallz
12/03/2017, 03:53 PM
Wow just wow..This documentary on Netflix is alarming eye opener. To realize that we are in a state of loosing the entire coral population of the world in the next 30 years is more than depression.


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OK; so now I know this doco is ridiculously alarmist I know not to bother watching it.

Jon0807
12/03/2017, 07:52 PM
I watched it and tho I'm not supporting or denying that global warming may or may not be the cause, it seems that movies such as this have a very narrow view on things. Maybe I missed it, but I don't recall them even mentioning any other possibilities such as change ocean chemistry, pollution, normal cycle of nature, etc. Along with the movie Chasing Ice, they gear their research into proving to everyone that the cause of everything is global warming, rather than looking into what else could be causing the problems or if it's just the natural cycle of the climate.

Punchanello
12/03/2017, 09:36 PM
I watched it and tho I'm not supporting or denying that global warming may or may not be the cause, it seems that movies such as this have a very narrow view on things. Maybe I missed it, but I don't recall them even mentioning any other possibilities such as change ocean chemistry, pollution, normal cycle of nature, etc. Along with the movie Chasing Ice, they gear their research into proving to everyone that the cause of everything is global warming, rather than looking into what else could be causing the problems or if it's just the natural cycle of the climate.

The vast majority of credible scientific evidence points to anthropogenic climate change as a primary cause of coral bleaching events. Giving equivalence to other factors is like stumbling upon a man with a knife through his throat and postulating that maybe a strike of lightning killed him. Sure it's possible, but given all the other evidence you have, is it a reasonable theory?

marco j
12/15/2017, 01:19 PM
This "documentary" is nothing but fear porn.

ReefMaster48
12/15/2017, 01:41 PM
This "documentary" is nothing but fear porn.

+1

Let us remember that the people doing the research on global warming and "coral death", are the same people that rely on this information to get a paycheck and have a life. Imagine if they reported that global warming was not real, you think they would have a job? NO! lol

I believe that climate change is real. But no where near the level that anyone presents nor is there enough proof that humans have caused it or that it wil ever cause an issue. And especially an issue that nature will not adapt too. These marine documentaries often quote how a 1 degree difference will make all corals and reefs die. Oh really? Then how can bob run his tank at 74, harry run his at 76, and I run mine at 78-79 all with healthy coral growth??? :debi: Just one example.

Jon0807
12/15/2017, 08:20 PM
+1

Let us remember that the people doing the research on global warming and "coral death", are the same people that rely on this information to get a paycheck and have a life. Imagine if they reported that global warming was not real, you think they would have a job? NO! lol

I believe that climate change is real. But no where near the level that anyone presents nor is there enough proof that humans have caused it or that it wil ever cause an issue. And especially an issue that nature will not adapt too. These marine documentaries often quote how a 1 degree difference will make all corals and reefs die. Oh really? Then how can bob run his tank at 74, harry run his at 76, and I run mine at 78-79 all with healthy coral growth??? :debi: Just one example.

There's a lot of money to be made in fear mongering

Reefable
12/15/2017, 09:09 PM
I just hope and pray this stops whatever theory might be causing it. It's hurts to see how fast they are being wiped off...


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ReefMaster48
12/16/2017, 05:29 AM
I just hope and pray this stops whatever theory might be causing it. It's hurts to see how fast they are being wiped off...


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Obviously there would need to be more research to prove this, but have we ever thought that maybe this is natural and good?

Sure, there may be one area full of x coral thats dieing off. But what if there is another (possibly more) parts of the ocean where there is more x coral growing and maybe even better then this area. Perhaps the die off in this area is to allow room for another coral which needs the space, or just a different kind of environment.

Nature has its own way of dealing with things, and in an incredibly complex way. To say that there is only one cause is incredibly foolish, and shows the quality and trustworthiness of information coming from that source.

If we take a picture of America, then focus on a state, then focus on a retirement home, and this is the only picture that we see of America. If this is all we see, then you would be led to think that America is not repopulating well, and will be dying off quicker then it can rebuild. Well of course we would have to think that! Now if we focus the picture frame on a maternity section in a hospital, you would think the complete opposite.

The Oceans are incredibly vast, and not even all of the current research done could even slightly begin to accurately show a full picture of the ocean's reefs. So why are we concerned that one little area is transitioning from one environment to another?

karimwassef
12/16/2017, 09:42 AM
Nature is slow and changes over millennia. Man is fast and can make changes over years. Ok- decades if congress is involved.

Maybe this will be a good thing in 10,000 years when the colder oceans get tropical and are full of coral... but in the meantime, all we can measure is the cost to the already tropical oceans. It would be amazing to reef snorkel in Cape Cod (assuming it exists) in 10,000 years, but Cancun would become a hurricane hell zone?

fabulousfavia
12/18/2017, 11:12 AM
I watched it a few months ago and I had thought is there any way to restore the coral after it has bleached and I thought of a cool project that us as hobbyists could experiment with to learn more about bleaching. The experiment would only require a small frag tank and some spare trace elements. I was thinking that the aquarist could raise the temperature of the tank until the few coral inside would bleach and once they had bleached the aquarist could dose different trace elements, amino acids, and phyto and zooplynkton to see if there is any way to restore corals after they have bleached.

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Softhammer
12/23/2017, 09:26 AM
I'm am currently doing just this. I have a huge 100% bleached but alive montipora that has been in darkness in my sump for 2 months plus, getting blasted by freshwater top off and covered with sediment. In a week in the main tank it's already coming back. Zero dead pieces. Have always had similar results with frags inadvertently buried in the sand. They almost always recover. I would like to see a post documentary -documentary if you will of recovery. Given the planktonic food source in the ocean I'm willing to put money on the fact that corals can survive by eating their way through bleaching events. The only caveat being that if conditions worsen.

LeJeune981
12/24/2017, 09:19 AM
I watched a similar doc. About staghorn specific corals... where they are having large bleaching events causing all the stage horn to die out... but.... they found that when 2 differant species of stage horn interbreed.. the offspring of the 2 are way more resilient to the disease that's is causing the others to bleach out.. and that crossbreed species is now taking over where the others have bleached out..and are thriving

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djbon
12/25/2017, 12:48 AM
In my state, our reefs are exposed to high water temperature (over 30C) during low tide, and can be chilling cold during raining seasons and yet to find any major bleaching events as far as I can remember. Crown of thorn starfish invasion, yes it happened before. I am almost certain that reef in the equator is battered with temperature swing that most reefers trying to avoid. My tank temperature can be as low as 26C and jump to a high 31C late afternoon and so far no bleaching.

I think GBR is devastated by sudden changes of current originating from warm ocean, and not due to global warming, even though I do feel that our state is a bit warmer nowadays (we can play football in the 80s with the sun right above our head).

Megalonyx
12/30/2017, 05:34 PM
In my state, our reefs are exposed to high water temperature (over 30C) during low tide, and can be chilling cold during raining seasons and yet to find any major bleaching events as far as I can remember. Crown of thorn starfish invasion, yes it happened before. I am almost certain that reef in the equator is battered with temperature swing that most reefers trying to avoid. My tank temperature can be as low as 26C and jump to a high 31C late afternoon and so far no bleaching.

I think GBR is devastated by sudden changes of current originating from warm ocean, and not due to global warming, even though I do feel that our state is a bit warmer nowadays (we can play football in the 80s with the sun right above our head).

I apologize if I'm missing something but wouldn't sudden changes in current because of warmer oceans fall in line with climate change. I don't see why you're differentiating them. For the people who are calling "fear mongering", it's cool to be skeptical and all but how can you not see that the people who are in unrelenting denial of climate change have way way more money at stake- it would pay to take their opinions with a grain of salt. It's would be interesting to see reefs spread to more northern areas of the world and if the temperature stays elevated this would likely happen very slowly, but in our time we will not get to see any of this. A large amount of the worlds population depends on reefs for their income and sustenance and they simply cannot wait hundreds of years for reefs to grow back.

Twinfallz
12/30/2017, 07:02 PM
I apologize if I'm missing something but wouldn't sudden changes in current because of warmer oceans fall in line with climate change. I don't see why you're differentiating them.

Firstly, bleaching occurred in the most northern region of the GBR only.
What was the real cause of this bleaching event? Warmer water could have played a part. There was a record El Nino event after all, equal to the 1998 event, which was itself responsible for coral bleaching, directly due to the related rise in ocean surface temperature in that region, which is a measure of El Nino intensity. But, any related rise in ocean surface temperature is secondary to the most significant & critical factors responsible for coral bleaching. What are those?

As discussed by Ampou 2017 https://www.biogeosciences.net/14/817/2017/ Indonesian biologists had reported that a drop in sea level had bleached the upper 15 cm of the reefs before temperatures had reached NOAA’s Coral Reef Watch bleaching thresholds. 2015 altimetry data shows that sea level was at its lowest in the past 12 years, and this drop in sea level had likely been experienced throughout much of the Coral Triangle including the northern Great Barrier Reef (GBR), and then accelerated during the El Niño. They speculated sea level fall also contributed to the bleaching during the 1998 El Niño. Consistent with the effects of sea level fall, other researchers reported bleaching in the GBR was greatest near the surface then declined rapidly with depth.

Indeed the Great Barrier Reef had also experienced falling sea levels similar to those experienced by Indonesian reefs. Visitors to Lizard Island had reported more extreme low tides and more exposed reefs which is consistent with the extremely high mortality in the Lizard Island region during the 2016 El Niño. Of course reefs are often exposed to the air at low tide, but manage to survive if the exposure is short or during the night. However as seen in tide gauge data from Cairns just south of Lizard Island, since 2010 the average low tide had dropped by 10 to 15 cm. After previous decades of increasing sea level had permitted vertical coral growth and colonization of newly submerged coastline, that new growth was now being left high and dry during low tide. As a result shallow coral were increasingly vulnerable to deadly desiccation during more extreme sea level drops when warm waters slosh toward the Americas during an El Niño.

Furthermore, an El Niño in the Coral Triangle not only causes a sudden sea level fall, but it also generates a drier high-pressure system with clear skies, so that this region is exposed to more intense solar irradiance. In addition, El Niño conditions reduce regional winds that drive reef-flushing currents and produce greater wave washing that could minimize desiccation during extreme low tides. And as one would predict, these conditions were exactly what were observed during El Niño 2016 around Lizard Island and throughout the northern GBR.

Apology accepted!

Reefable
12/30/2017, 09:49 PM
Firstly, bleaching occurred in the most northern region of the GBR only.

What was the real cause of this bleaching event? Warmer water could have played a part. There was a record El Nino event after all, equal to the 1998 event, which was itself responsible for coral bleaching, directly due to the related rise in ocean surface temperature in that region, which is a measure of El Nino intensity. But, any related rise in ocean surface temperature is secondary to the most significant & critical factors responsible for coral bleaching. What are those?



As discussed by Ampou 2017 https://www.biogeosciences.net/14/817/2017/ Indonesian biologists had reported that a drop in sea level had bleached the upper 15 cm of the reefs before temperatures had reached NOAA’s Coral Reef Watch bleaching thresholds. 2015 altimetry data shows that sea level was at its lowest in the past 12 years, and this drop in sea level had likely been experienced throughout much of the Coral Triangle including the northern Great Barrier Reef (GBR), and then accelerated during the El Niño. They speculated sea level fall also contributed to the bleaching during the 1998 El Niño. Consistent with the effects of sea level fall, other researchers reported bleaching in the GBR was greatest near the surface then declined rapidly with depth.



Indeed the Great Barrier Reef had also experienced falling sea levels similar to those experienced by Indonesian reefs. Visitors to Lizard Island had reported more extreme low tides and more exposed reefs which is consistent with the extremely high mortality in the Lizard Island region during the 2016 El Niño. Of course reefs are often exposed to the air at low tide, but manage to survive if the exposure is short or during the night. However as seen in tide gauge data from Cairns just south of Lizard Island, since 2010 the average low tide had dropped by 10 to 15 cm. After previous decades of increasing sea level had permitted vertical coral growth and colonization of newly submerged coastline, that new growth was now being left high and dry during low tide. As a result shallow coral were increasingly vulnerable to deadly desiccation during more extreme sea level drops when warm waters slosh toward the Americas during an El Niño.



Furthermore, an El Niño in the Coral Triangle not only causes a sudden sea level fall, but it also generates a drier high-pressure system with clear skies, so that this region is exposed to more intense solar irradiance. In addition, El Niño conditions reduce regional winds that drive reef-flushing currents and produce greater wave washing that could minimize desiccation during extreme low tides. And as one would predict, these conditions were exactly what were observed during El Niño 2016 around Lizard Island and throughout the northern GBR.



Apology accepted!



Very interesting thanks for sharing


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Megalonyx
12/31/2017, 12:15 AM
Interesting and surprising scientific rebuttal. I would like to point out that, in the movie, it was said that the southern portion of the Great Barrier Reef was spared from bleaching because of massive amounts of cold water dumped on it from a storm. In fact they had originally set up in the south expecting it to be bleached but had to move to capture the bleaching event.

Sea level dropped around 2010-2013 around Australia due to unusually heavy rains on the continent( Australia's geography resulted in the collection of water in the outback- please read more about this in the sources at the bottom). The only reason this has an effect on sea level was because of the unusually high rains Australia received during that time period-
Australia has been predicted and shown to be subject to heavier rains as an effect of climate change ( again sources below). That would seem to show that even if we assumed that bleaching in the northern Great Barrier Reef was caused by low sea levels that base culprit is still climate change.

https://www.scientificamerican.com/article/a-scientist-explains-the-mystery-of-recent-sea-level-drop/
https://www.npr.org/2013/08/20/213577129/how-extreme-australian-rains-made-global-sea-levels-drop
http://www.dailymail.co.uk/sciencetech/article-2398782/How-Australias-thirsty-Outback-soaked-water-like-sponge-causing-drop-GLOBAL-sea-levels.html
https://www.google.com/amp/s/amp.theguardian.com/environment/2013/aug/23/australian-floods-global-sea-level
https://www.google.com/amp/s/phys.org/news/2017-01-hard-fall-australia-climate.amp


Now, the coral beachings in Australia, as well as Hawaii, were caused by an El Niño event however this was an unusually long and strong one. It has been shown that El Niño events have occurred in some degree at least as far back as the beginning of the Holocene and generally occur every two to seven years. In this bleaching event the Great Barrier Reef lost 29% of its coral ( the northern parts losing almost 60%). This is certainly not a normal occurrence. El Niño events have been predicted to increase in frequency and duration as a result of climate change- in fact they already have. I don't know of anything specifically linking the El Niño event in question directly to climate change however I can leave you with plenty of sources that show that El Niño's are worsened by the effects of climate change.
https://e360.yale.edu/features/el_nino_and_climate_change_wild_weather_may_get_wilder
https://www.nature.com/articles/nclimate2100
http://climatechange.cornell.edu/whats-el-nino-up-to-now/
https://www.google.com/amp/s/www.carbonbrief.org/extreme-el-ninos-double-frequency-under-one-point-five-celsius-warming-study/amp
http://www.bbc.com/news/science-environment-24494398

Additionally, I think, correct me if I'm wrong since it has been several months since I watched the movie, all the bleached reefs they showed along with their bleaching time lapse were under water and not exposed to air at all. The Great Barrier Reef has an average depth of 35 meters, I simply don't see how a drop in 15 centimeters could have killed 30% of it by exposure, ( 60% in affected parts)

rjjr1963
12/31/2017, 07:07 PM
The climate has never been static. Dramatic and rapid climate change events have happened over the eons. Volcanic eruptions, rapid global temperature changes and rapid changes in the environmental chemical composition. The changes and variables have given us a rich, abundant and diversified ecology. Man should mitigate his impact but these paid for alarmists are to be treated with skepticism and must develop verifiable theories which are falsifiable. This is the way of science.

Twinfallz
01/01/2018, 12:28 AM
I would like to point out that, in the movie, it was said that the southern portion of the Great Barrier Reef was spared from bleaching because of massive amounts of cold water dumped on it from a storm. In fact they had originally set up in the south expecting it to be bleached but had to move to capture the bleaching event.

It’s beyond ridiculous to attempt to explain the absence of coral bleaching on the majority of the GBR by suggesting one storm could make any difference at all let alone have such a massive impact.
I’m surprised you haven’t cited man-made global warming as the cause of this massive amount of storm delivered cold water.

Sea level dropped around 2010-2013 around Australia due to unusually heavy rains on the continent. The only reason this has an effect on sea level was because of the unusually high rains Australia received during that time period-
Australia has been predicted and shown to be subject to heavier rains as an effect of climate change ( again sources below). That would seem to show that even if we assumed that bleaching in the northern Great Barrier Reef was caused by low sea levels that base culprit is still climate change.
The 2010-11 Queensland flooding event, which you incorrectly consider unusual as a result of man-made global warming, wasn’t unusual at all. These heavy flooding rains don’t occur yearly, but are a normal and regular occurrence in this area - for example - “Wivenhoe Dam, Brisbane’s main dam, was planned in the early 1970s as a flood mitigation and water storage dam. The 1974 Brisbane flood highlighted the need for flood protection for South East Queensland.” “Brisbane experienced major flooding in 1893, 1974 and 1996. The 2010 La Niña Modoki weather pattern, which brings wetter conditions to eastern Australia, was the strongest since 1973.”

The 2010-11 Brisbane & surrounding area flooding was made far worse by the fact that the dam was left near full capacity despite the forecasted cyclone & expected heavy rains. Rather than keeping the dam’s level generally lower to deal with heavy rain events, as was intended, or lowering the dam’s water level prior to the expected event by draining water into the Brisbane River, the rain waters flooded out of the dam, flooded the river and previously known flood prone zones that the dam was built to protect in the first place, and previously known flood prone zones the council had hence allowed to be built on.

As Fasullo notes – “a rare combination of three large-scale climate modes—La Niña, the Southern Annular Mode, and the Indian Ocean dipole” was responsible for the heavy rains, as well as cyclone activity. This is a natural occurrence, not man-made global warming.
Note: no need to post four newspaper links, all written in the same month & year, referring to the same exact theory by one person. One links sufficient.

As far as your link to future rainfall patterns in Australia is concerned, it’s merely a model projection based on arbitrary assumptions & input, has no value at all other than to the fellow who received grant money to produce it, & whose livelihood is reliant on the climate crises industry.

The 2010-11 La Nina rains had nothing to do with sea level fall during the period of the far northern GBR bleaching event. The 2010-11 event was responsible for an estimated fall of 7mm over a one-and-a-half-year time period. Further, as reported in August, 2013, on any of the four articles you posted, “atmospheric patterns have returned to normal, more rain is falling over the tropical oceans once more and the seas are rising again.”

Not only was sea level rising again from 2011, the estimated 7mm fall is insignificant compared to the 15cm fall (2016) as noted in Ampou 2017, and also by the average low tide fall of 10 to 15 cm as measured by tide gauges in Cairns.




Now, the coral beachings in Australia, as well as Hawaii, were caused by an El Niño event however this was an unusually long and strong one. It has been shown that El Niño events have occurred in some degree at least as far back as the beginning of the Holocene and generally occur every two to seven years. In this bleaching event the Great Barrier Reef lost 29% of its coral ( the northern parts losing almost 60%). This is certainly not a normal occurrence. El Niño events have been predicted to increase in frequency and duration as a result of climate change- in fact they already have. I don't know of anything specifically linking the El Niño event in question directly to climate change however I can leave you with plenty of sources that show that El Niño's are worsened by the effects of climate change.
Your five links, all concerning just two papers dealing with El Nino future projections, are again nothing but scary scenarios, both based on model projections that are based on arbitrary assumptions. They are not useful as they are not data, because they cannot be tested for accuracy.

The 2015-16 El Nino & the 1997-98 El Nino, were both officially classed as ‘very strong’ as measured by intensity. So were the 65-66, 72-73, and 82-83 events. Although it is true that the 2015-16 event lasted longer than the event back in 97-98, when both are measured for duration at the time they reached, and then fell below, an intensity classed as only ‘moderate’, the difference in duration between the two is insignificant.
When measured for duration at the intensity rating of ‘strong’ and above, and the intensity rating of ‘very strong’, again the difference is insignificant as is the overall intensity between the two events. Suggesting the 2015-16 event was “an unusually long and strong one” is not accurate if comparing it to the El Nino back in 97-98, 18 years earlier.

Your arguments are all based on blaming every natural event on man-made global warming. Now it’s responsible for making El Nino’s worse. But there is no proof of this, only arbitrary model projections. It’s a favourite but baseless claim endlessly repeated by climate alarmists.

Simply, create a concept & reality leaves the room. It goes; ‘the atmosphere is really really sensitive to increasing co2, & this will make the world really hot, and the oceans really hot, & this will kill all corals’.
It’s impossible to argue with a concept that suggests man-made global warming is responsible for everything. More heatwaves - more deadly cold snaps. More rain – less rain. More floods – more droughts. More severe snow storms – no more snow ever. More hurricanes – less hurricanes etc, etc. It’s a concept readily absorbed by even the most scientifically illiterate & naïve, who run with it.

What the data actually shows to be the most critical component in regards to the GBR and Indonesian bleaching event is significant sea level fall in that region exacerbated by El Nino.


As far as the Holocene is concerned sea levels were around 160 meters lower. No doubt ocean circulation patterns were significantly different. There was no GBR. The water was land ice. It melted when the ice age ended. Still is, naturally. The GBR started forming 8,000 years ago, during the Holocene Maximum, when average temperatures were estimated to be up 5 degrees Centigrade higher than present. Warmer ocean water too. How bout that.


Additionally, I think, correct me if I'm wrong since it has been several months since I watched the movie, all the bleached reefs they showed along with their bleaching time lapse were under water and not exposed to air at all. The Great Barrier Reef has an average depth of 35 meters, I simply don't see how a drop in 15 centimeters could have killed 30% of it by exposure, ( 60% in affected parts)
Well, they can decide what to, & what not to show in a movie, especially when its agenda driven propaganda. I haven’t watched the movie as its nothing but propaganda. I know this from looking into the people & organisations, & scientist involved in making the movie. It’s a follow on from ‘chasing Ice’, which I have no doubt is just more propaganda. They omit important facts, exaggerate others, & tell straight lies. But if he makes a living out of it, well, it’s a free world.

In any case, the Indonesian reefs were bleached by low sea level and not “temperature-induced bleaching” Ampou 2017.

On the GBR, shallow-water corals on inshore, mid-shelf & outer-shelf reefs were reported as the most affected. Consistent with the effects of sea level fall, researchers reported bleaching in the GBR was greatest near the surface then declined rapidly with depth.
No doubt that corals below the surface, even at the lowest tides were affected as well, as the El Nino generated clear skies causing more intense solar irradiance, reduced regional winds that drive reef-flushing currents that produce greater wave washing that would minimize the very warm pools of virtually stagnant water.

No doubt that some of the ‘movie’ corals were underwater when filmed, some even at low tide. But on what day? Low tide levels change from tide to tide, & day to day. For example; corals that were not exposed on the low tide on the afternoon of 5th March 2016 would have been during the periods between March 7-11 & April 5-10, for example.. http://www.bom.gov.au/ntc/IDO59001/IDO59001_2016_QLD_TP006.pdf

Coral mortality following extreme low tides and high solar radiation
https://link.springer.com/article/10.1007/s00227-006-0573-0
On coral reefs, spring low tides are recurrent disturbances, but are rarely reported to cause mass mortality. However, in years when extremely low tides coincide with high noon irradiances, they have the potential to cause widespread damage. Here, we report on such an event on a fringing coral reef in the central Great Barrier Reef (Australia) in September 2005. Visual surveys of colony mortality and bleaching status of more than 13,000 corals at 14 reef sites indicated that most coral taxa at wave-protected sites were severely affected by the event. Between 40 and 75% of colonies in the major coral taxa (Acropora, Porites, Faviidae, Mussidae and Pocilloporidae) were either bleached or suffered partial mortality. In contrast, corals at wave-exposed sites were largely unaffected (<1% of the corals were bleached), as periodic washing by waves prevented desiccation. Surveys along a 1–9 m depth gradient indicated that high coral mortality was confined to the tidal zone. However, 20–30% of faviid colonies were bleached throughout the depth range, suggesting that the increase in benthic irradiances during extreme low tides caused light stress in deeper water. Analyses of an 8-year dataset of tidal records for the area indicated that the combination of extended periods of aerial exposure and high irradiances occurs during May–September in most years, but that the event in September 2005 was the most severe. We argue that extreme low-tide, high-irradiance events are important structuring forces of intertidal coral reef communities, and can be as damaging as thermal stress events. Importantly, they occur at a time of year when risks from thermal stress, cyclones and monsoon-associated river run-off are minimal.
End.

Coral Mortality and Resilience

There are 4 widespread misconceptions about bleaching propagated by tabloid media hyping climate doom and researchers like Hoegh-Guldberg. To clarify:

1 Bleaching is not always driven by warming temperatures

2 Bleaching is not responsible for most coral mortality.

3 Coral can rapidly respond to disturbances and replace lost cover within a decade or less.

4 Bleaching, whether or not it results in coral mortality, is part of a natural selection process from which better-adapted populations emerge.

Severe 2010 Cold-Water Event Caused Unprecedented Mortality to Corals of the Florida Reef Tract and Reversed Previous Survivorship Patterns
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0023047
In January 2010, coral reefs of Florida, United States, were impacted by an extreme cold-water anomaly that exposed corals to temperatures well below their reported thresholds (16°C), causing rapid coral mortality unprecedented in spatial extent and severity.

The impacts recorded were catastrophic and exceeded those of any previous disturbances in the region. The mean percent coral mortality recorded for all species and subregions was 11.5% in the 2010 winter, compared to 0.5% recorded in the previous five summers, including years like 2005 where warm-water bleaching was prevalent.

jestronix
05/21/2018, 07:13 PM
Most people if they get a severe illness like cancer will go and see a doctor and follow all avenues of scientific research based treatments , do they argue there's no proof and walk off ? Do they argue with the doctor and say these drug treatments are just scaremongering ? How interesting it is that we pick and choose when scientific research is credible:) usually when it only effects us right ? In most cases I suspect it's all for ego and the need to argue and justify a strong need to be different!

If you didn't shed a tear in this doco or feel some emotional response you may need to ease up on the Xanax, err which is also based on scientific research !

If you don't believe in scientific research based methods and they that are falsified by a group of extreme leftists, it may be time to drain your tank and put some plastic corals in and a few rubber fish! Oh and burn those test kits you have, surely they are the work of the devil ?

In all seriousness though, believer or non believer it's sad to see all those bleached corals and the countless losses of life underneath.