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#1371773 - 29/03/2016 21:47 Coral Bleaching
Ronfishes Offline
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Registered: 25/02/2013
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Loc: Gordonvale
Some footage of the most devastating coral bleaching ever seen.

https://au.news.yahoo.com/video/watch/31...g-damage/#page1
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#1371774 - 29/03/2016 21:51 Re: Coral Bleaching [Re: Ronfishes]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 5177
Loc: Wollongong NSW
Yes, I saw something about this on 7:30 last night. The whole reef from Lizard Is to PNG has been bleached from what I heard. It's a massive issue.

We're currently studying the Great Barrier Reef, so no doubt, this will be a big topic in my Geography class.

Thanks for starting this thread.


Edited by Wave Rider (29/03/2016 21:52)
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Oct- 21st
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#1371776 - 29/03/2016 22:02 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
My friends parents posted some underwater photos on FB from Fitzroy Isalnd today, not sure if they realized but every pic has bleaching in the background
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2016-2017 wet season: 1187.6mm
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#1371778 - 29/03/2016 22:12 Re: Coral Bleaching [Re: Ronfishes]
Wave Rider Offline
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Hmmm, they probably don't realise.

http://mobile.abc.net.au/news/2016-03-28...section/7279338

An article about it above. Basically what I watched last night in written form
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2016-17 season storm total for here= 12

Oct- 21st
Nov- 9th, 28th
Jan- 24th
Feb- 11th, 12th, 17th, 18th(2)
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#1371803 - 30/03/2016 11:04 Re: Coral Bleaching [Re: Ronfishes]
ozone doug Offline
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Registered: 06/11/2006
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Loc: Roma SW QLD Eye to the S Wes...
Man that's pretty bad ,I'll have to go and have another look with my family before its gone .Sad but it's just the start of a whole new world that wont be pretty. Acidifying of ocean will be leaving shellfish with no shells and carbon /methane .
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#1371869 - 30/03/2016 20:50 Re: Coral Bleaching [Re: Ronfishes]
Seira Offline
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Registered: 27/08/2003
Posts: 6741
Loc: Adelaide Hills.


Edited by -Cosmic- (naz) (30/03/2016 20:56)
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#1371910 - 31/03/2016 11:16 Re: Coral Bleaching [Re: Ronfishes]
SBT Offline
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Registered: 07/02/2007
Posts: 14126
Loc: Townsville Dry Tropics
All that dead coral is a resource that can be put to good use.

In the 1800's to 1940's it was used for all sorts of things but I am sure someone could come up with even more uses than the ones I have jokingly made below.

Some suggestions could include:
1) crushed and burnt to produce lime for cement.
2) harvest and paint it for souvenirs.
3) crushed for road base.
4) crushed and used in toothpaste
5) crushed and used for medical implants for spinal surgery
6) crushed and used in Cairns to build a semi decent beach
7) crushed and used for footpaths
8) crushed to make whitewash/lime render for walls
9) make jewellery out of it
10) filters for aqua culture
11) paint making
12) ceramics
13) compressed in moulds with the addition of epoxy glue to become furniture
14) kitty litter
15) oil spill clean up kits
16) abrasive paper for wood working
17) grinding pastes
18) soaking up greenies tears at rallies.
19) false teeth and dental implants
20) flog it off as modern day fossils
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#1372032 - 01/04/2016 19:27 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
I just returned from a 3 day liveaboard off Cairns and I would say the more vulnerable sections of the reef were about 20% bleached. On the other hand I dived a site called 3 Sisters where there were few visible signs of bleaching. I think it fared a bit better being a set of bommies separated from the main reef with plenty of water flowing over. Sites where the water flow was not as good I'm sure fared worse.

My understanding is that areas to the North of Lizard Island bore the brunt of 33C water temps whereas temps a little further South were in the 30-31C range. I plan on diving with Mike Ball later in the year that will visit some of those Northern Reefs so will get a clearer idea of the true picture at that time.

In terms of the reef being gone for good I wouldn't worry too much. Certainly sections will be hit hard from a strong El Nino event such as the one we just had but its far from having wiped out the whole reef and with another 15-18 years before the next strong El Nino it will have its chance to recover as it did from the 97/98 event.


Edited by Locke (01/04/2016 19:29)

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#1372043 - 01/04/2016 22:14 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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YTD: 1071.2mm

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#1372101 - 02/04/2016 18:14 Re: Coral Bleaching [Re: Ronfishes]
Dipole Offline
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Registered: 10/01/2013
Posts: 315
Loc: Hervey Bay 48m,Tuross Head


Good resource,rf.

I note that "In both the 1998 and 2002 (el nino) events, the vast majority of
corals on the Reef survived, as sea temperatures came
back down again in time for them to recover. About
five per cent of the Great Barrier Reef’s coral reefs
experienced coral die-off in both these events."

Hope that the recovery this time is just as rapid.

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#1372264 - 04/04/2016 19:51 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
Wasn't aware the Solitary islands had coral let alone bleaching:

http://www.surg.org.au/content/about-us
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2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1372321 - 05/04/2016 11:41 Re: Coral Bleaching [Re: Ronfishes]
ozone doug Offline
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Registered: 06/11/2006
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Loc: Roma SW QLD Eye to the S Wes...
Good find Ron . I didn't know coral was that far south ,I would like to see that spot now .
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#1372742 - 11/04/2016 10:06 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
Coral bleaching is now being reported on WA coast near Broome, previously unheard of in this area I think?

http://www.abc.net.au/news/2016-04-10/coral-bleaching-at-reddell-beach-in-broome/7314710


Edited by Ronfishes (11/04/2016 10:12)
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2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1372746 - 11/04/2016 10:30 Re: Coral Bleaching [Re: Ronfishes]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 5177
Loc: Wollongong NSW
Geez that's bad also. Soon Ningaloo Reef will be hit, but hopefully not..
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Nov- 9th, 28th
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#1372763 - 11/04/2016 13:42 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Registered: 31/12/2002
Posts: 2966
Loc: Broome


Yes seen a bit of coral bleaching around the local reefs but it is fairly spasmodic usually worse near the more peripheral areas closer to shore.
Some reefs have been exposed to high temperatures during the lower tides when they completely out of the water and also high water temps with those hotter days as we have a lot of this year.

Usually we have more cloudy type days and mixing of the water with cyclones and lows but this year haven't had much at all which has contributed to the high water temps especially on the reef close to shore.
We had some bad fish kills from bacteria up the coast near Manari this year as well.

In September last year did a few dives around the area and in general I thought the coral was in pretty good shape .
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#1372777 - 11/04/2016 17:49 Re: Coral Bleaching [Re: Ronfishes]
Popeye Offline
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Registered: 30/12/2006
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Loc: Cable Beach - Broome WA
Yeah definitely not the first time its happened here. A few years back you could see big white coral outcrops just under the surface on the low tides. They stood out clearly. Last few years there has not been any. Will be having some low tide trips at work soon so will find out if any bleaching in the areas we use. Agree with Des though in regards to local conditions in the NWest this year being pretty horrendous.
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#1372780 - 11/04/2016 18:45 Re: Coral Bleaching [Re: Ronfishes]
Seabreeze Offline
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Registered: 18/09/2005
Posts: 10026
Loc: South West Rocks, NSW
Originally Posted By: Ronfishes
Wasn't aware the Solitary islands had coral let alone bleaching:

http://www.surg.org.au/content/about-us

There is also coral further south than that around Fish Rock at South West Rocks, just north of 31ºS.
Lord Howe Island about 31.5ºS but well offshore in the Tasman Sea has coral as well. Middleton and Elizabeth Reefs though further north than Solitary Island are large reefs well offshore, approx. between 29.5-30ºS.
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#1372793 - 11/04/2016 20:48 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Registered: 25/02/2013
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Loc: Gordonvale
Thanks for the local info Desie, Pops and Seabreeze.
If we see bleaching in Sept we are in serious trouble Des wink Those corals in WA are said to be some of, if not the hardiest in the world.
Was aware the Lord Howe claims the southern most coral reef. I went for a fisheries job of some sort for the Solitary islands way back in '98 when I was fresh out of college. Failed though lol
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MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1372804 - 11/04/2016 23:51 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Registered: 31/12/2002
Posts: 2966
Loc: Broome

Hers a few pics of corals around the Riddell area which are pretty vulnerable .
Pops I think you paddle around this area in the dry although on bigger tides. wink
These pics were taken in March 2015 on king tides low of 0.67m .



]



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#1372806 - 12/04/2016 00:53 Re: Coral Bleaching [Re: Ronfishes]
Popeye Offline
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Registered: 30/12/2006
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Loc: Cable Beach - Broome WA
Checked that spot out at low tide a few weeks ago Des. Awesome spot. Some of the best exposed corals around Broome at low tide there. Heaps of Turtles at the right time of year as well.
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#1372828 - 12/04/2016 11:24 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Registered: 31/12/2002
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Loc: Broome

Yes nice spot Pops so colourful and seen lots of sealife including Blue Rings Occis and some beautiful colourful different types of Nudibranchs ...

If wide scale coral bleaching occurring locally should be pretty apparent in these locations first you would think..
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#1372829 - 12/04/2016 11:29 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Registered: 31/12/2002
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Loc: Broome


Yes Pops nice reef along that area wish I had a camera like you to get those real you beaut pics especially considering it is so colourful.
Have seen lots Nudibranches in different colours ,blue rings ,and so many tropical fishes etc on the low tide.

You would think if coral bleaching was happening wide scale locally these areas would be the first to show it up.
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#1373192 - 16/04/2016 13:15 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Registered: 31/12/2002
Posts: 2966
Loc: Broome

Interesting article

W.A Coral Bleaching
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#1373221 - 17/04/2016 08:38 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
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Loc: Brisbane
Here's a photo taken at Three Sisters off Cairns on the trip I did with Pro Dive last month.

As posted previously, although I saw some bleaching on this trip, it was a long way from being a wasteland. Doing the far northern reef later in the year and will post some photos after that trip where I expect to see more extensive bleaching than off Cairns.


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#1373276 - 17/04/2016 17:02 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
Great pic Locke
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MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373372 - 18/04/2016 20:47 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
Not much we haven't already heard (warning, may mention the unmentionable):

https://youtu.be/PoO9uWg5p4I

Will be interesting when you head up later in the year Locke, see how much recovery is or isn't occurring.
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373468 - 20/04/2016 08:18 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
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Loc: Brisbane
Provided the whole reef isn't inexplicable wiped out in 1 go by an extremely unlikely single catastrophic event, then its remarkable ability to recover will always ensure that medimum term climate influences such as the 1 in 15-18 yr strong El Nino like the one we just had will never spell doom for the reef.

Just as the bush always grows back after a bushfire so will the reef grow back after a cyclone, crown of thorns attack or coral bleaching event.

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#1373505 - 20/04/2016 15:55 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Loc: Gordonvale
Yeah. Nah. This is an unprecedented event. The question is whether the areas affected will recover before the next cyclone, crown of thorns outbreak or bleaching event.

http://www.sciencemag.org/news/2016/04/survey-confirms-worst-ever-coral-bleaching-great-barrier-reef
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MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373506 - 20/04/2016 16:09 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Loc: Brisbane
Unprecedented in an era where we've only had 2 strong El Nino events spaced 17 years apart is a very subjective word.

Sure the Northern section of the reef has been hit very hard and may well take a decade to recover, but your talking about a reef system over 2000km which a large portion of which has not been severely bleached.

Severe tropical cyclones wipe out entire sections of reef which still manage to subsequently recover. The odds of a severe tropical cyclone hitting a particular section of reef are surprisingly small and I'd be very surprised to see a crown of thorns outbreak on a section of reef 95% bleached.

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#1373510 - 20/04/2016 16:52 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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200 year old corals do not recover in a decade or two.
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373513 - 20/04/2016 16:58 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Registered: 25/02/2013
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Loc: Gordonvale
[uhn-pres-i-den-tid]
adjective
1.
without previous instance; never before known or experienced; unexampled or unparalleled:
an unprecedented event.
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373517 - 20/04/2016 17:28 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
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Loc: Brisbane
I would suspect multiple trees of age greater than 200 years are destroyed by weather events each year.

In Brisbane in 2011, the floods had destroyed a 200 year old tree at a camping ground I visited afterwards as well as a number of others along the river bank. I don't recall anyone suggesting at that point that the camp grounds would never recover.

Recovery of the reefs is not dependent on the replacement of a single 200 year old piece of coral. The great barrier reef has been present for over 10,000 years. In its history coral formations of a variety of ages have no doubt come and gone destroyed by cyclones and previous bleaching events. Very old pieces of coral have been destroyed by natural events previously and yet they still exist on the reef aas evidenced by the presence of a 200 year old piece of coral destroyed by the current El Nino.

I'm not downplaying the magnitude of the current event. I've been diving the reef since 2002 and the extent of the bleaching off cairns was certainly greater than I've previously seen. But when trying to establish how it will recover in the years to come I think some of the reports have been far too pessimistic and underestimate the capacity of the reef to restore itself.

One of the most laughable things was this morning on Channel 9 news, Karl Stefanovic showing a piece of footage of what must have been a severely bleached far northern section of the reef and suggesting that this is what visitors to Cairns would see now when they went out to the reef. Utter BS and certainly not representative of what I saw on my trip in late March.

Anyways, I'll have a better idea of where things really stand when I see the Northern reefs for myself at the end of the year.

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#1373538 - 20/04/2016 22:13 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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You are generalizing and comparing apples with echidnas mate. We'd be fairly lucky if in the northern 1000km of reportedly severely bleached coral had one single 200 yr old lump of coral die. Nothing like a native forest that has evolved with fire for at least 50,000 years.

Admittedly we have not got much of a history for these events.
http://www.aims.gov.au/docs/research/climate-change/coral-bleaching/bleaching-events.html

Yes these areas may recover, but with faster growing corals. As these events inevitably become more severe and frequent it may result in decreased biodiversity as slower growing corals lose out to these faster growing species. Just my thoughts. Modern day evolution..

And for the love of whatever man, never speak of Karl Stefanovic again!
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373549 - 21/04/2016 08:11 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
Originally Posted By: Ronfishes
You are generalizing and comparing apples with echidnas mate. We'd be fairly lucky if in the northern 1000km of reportedly severely bleached coral had one single 200 yr old lump of coral die. Nothing like a native forest that has evolved with fire for at least 50,000 years.

Admittedly we have not got much of a history for these events.
http://www.aims.gov.au/docs/research/climate-change/coral-bleaching/bleaching-events.html

Yes these areas may recover, but with faster growing corals. As these events inevitably become more severe and frequent it may result in decreased biodiversity as slower growing corals lose out to these faster growing species. Just my thoughts. Modern day evolution..

And for the love of whatever man, never speak of Karl Stefanovic again!


If these events become more severe then the reefs will have less time to recover. But that's a very big if without getting further into forbidden topics.

The point I was trying to make was natural events take out long lived natural flora and fauna on a regular basis somewhere on this planet but where conditions remain conducive regrowth always occurs. The wreck of Yongala is a classic example of this. Put some structure in favorable conditions in tropical or sub-tropical waters and you'll get coral growth.

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#1373586 - 21/04/2016 15:26 Re: Coral Bleaching [Re: Ronfishes]
desieboy Offline
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Loc: Broome

Not saying I totally believe all of this but the author has some pretty good credentials ."Professor Ove Hoegh-Guldberg of the University of Queensland, who has studied coral for over three decades."

50% of reef dead...
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#1373590 - 21/04/2016 16:48 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale

I read somewhere that its possible that 50% of the badly affected Northern 1000km may die. They may have decided to clickbait the heading a little lol.

Still, 50% of almost 50% of the reef...
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MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373600 - 21/04/2016 18:21 Re: Coral Bleaching [Re: Ronfishes]
scott12 Offline
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Registered: 10/11/2015
Posts: 628
Loc: maadi Tully area
RF,When I was in High school in the 80's "they" also told me that the Amazon would be cleared by the year 2000..when I spent 6 months exploring the place in '95 I found that I'd probably need a few more lifetimes to actually see a fraction of what was remaining..

What I've learnt is that "they" have their own agendas and that often has very little basis in reality..

I've got half a dozen tanks filled and cant wait to get out get in the water and take a look, if these horrible winds ever stop...I'll try and take some footage as well..

Just remember that bleached coral is not dead coral.

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#1373610 - 21/04/2016 20:24 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
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Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
These 'they' you speak of Pogo, I'm guessing they're the ones that post facebook memes with not a reference or statistic in sight? Different to a scientist with aerial, underwater surveys and historical data? I'm not sure what their agenda may be they are already getting paid.

Just because the Amazon is massive does not mean it isn't getting smaller. I am not a pessimist, just a realist. Just because the most popular dive spots around Cairns are marginally affected does not mean the northern section is not in a bad way. I could make up a statistic like: 99% of people will never see it, so I'll just say most people won't get to see it. So it is good that people like Locke will get a look and be able to pass on real info a bit further on.

These horrible winds and cloud cover are probably the best thing that could of happened lol.
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373616 - 21/04/2016 21:22 Re: Coral Bleaching [Re: Ronfishes]
scott12 Offline
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Registered: 10/11/2015
Posts: 628
Loc: maadi Tully area
Unfortunately Ron all the planets resources will continue to dwindle and die as the worlds population and rampant worship of consumerism increases.. even people who think they are nature lovers are part of the problem...

http://news.nationalgeographic.com/news/2008/01/080129-sunscreen-coral.html

The best solution may be an event that wipes away 90% of the worlds population...

I'll get back to you on this coral bleaching once I've had a chance to check it out for myself..I've seen a pretty amazing recovery after the 2 big cyclones in the last 10 years and the incredible damage from those cant be compared to bleaching..

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#1373623 - 21/04/2016 23:32 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
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Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
Only the Northern part of the reef upwards has a 50% coral mortality rate I dived off Cairns very recently and would estimate no more than 20% of that section bleached.

Professor Ove Hoegh-Guldberg is absolutely full of crap or being misquoted. (I'm inclined to think full of crap given his track record of outlandish predictions of doom for the reef over the past decade).

When he says

“Dive teams have been looking at sample locations and are seeing well over 50 percent coral deaths.”

What he means is "dive teams have looked at a hand picked sample of the worst sections of the reef".

Currently at worst only a 500km section of the reef from Lizard Island upwards (repesenting less than a quarter of the reefs entire length of 2,300km) is severely bleached in the manner he has suggested. But then he's been quoting sensational headlines for over a decade and has never been called out on it.

Here is a NOAA site that presents data from Virtual stations on the reef. I'd pay more attention to that than Professor Ove.

http://coralreefwatch.noaa.gov/satellite/vs/greatbarrierreef.php#SassieReef_GBR

Anyway, the pictures I post here at the end taken from the Northern end of the reef year will give you a true indication of just how bad the situation is.

If they show total devastation in the manner Professor Ove has described I will be the first to admit I was wrong but I doubt that will be the case.



Edited by Locke (21/04/2016 23:34)

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#1373635 - 22/04/2016 08:25 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
Nice link Locke. The combination of poor journalism and bias makes it very difficult to interpret reality these days. When I went to uni, we were taught to interpret information and data without bias. Of course you need to try to come to a conclusion but leave your feelings out of it.

Once the effects of this event have been tallied, it will be interesting to get the final verdict on say the net 5 year loss/gain of reef area.
_________________________
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2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1373662 - 22/04/2016 11:37 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1377275 - 31/05/2016 20:01 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1377308 - 01/06/2016 04:37 Re: Coral Bleaching [Re: Ronfishes]
dormant Offline
Weather Freak

Registered: 30/01/2011
Posts: 532
Loc: near ferry, FNQ
And if the tourist industry were not affected how much angst would there be? How much study of coral beds are there where no one visits and where no human activity occurs on land to find out if this is just a natural cycle?

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#1377312 - 01/06/2016 07:30 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
Weatherzone Addict

Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
Hard to put a context on this when so much of this is attributable to a strong El Nino which occurs roughly once every 15-20 years.

The past 3 strong El Nino's occurred in 82/83, 97/98 and the current one. Each of these has been quite different in the distribution of the warmest SST anomalies.

82/83 was strongest in the East with the highest anomalies in the Nino 1+2 region, whilst the 97/98 had stronger anomalies in the Nino 3 region and finally the current event has been centred further West again recording highest values in the Nino 3.4 and 4 regions. (The Nino 1+2 readings for the current event don't come anywhere near the readings recorded in the past 2 strong El Nino's)

This surely must play some role in the distribution of above average anomalies on the Great Barrier Reef.

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#1378092 - 04/06/2016 16:55 Re: Coral Bleaching [Re: Ronfishes]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 6741
Loc: Adelaide Hills.
"the overall mortality rate is 22 percent -- and about 85% of the die-off has occurred in the far north between the tip of Cape York and just north of Lizard Island, 250 km north of Cairns. 75% of the reef will come out in a few months time as recovered."

--Dr. Russell Reichelt, Great Barrier Reef Marine Park Authority.
--Data from Australian Institute of Marine Science Survey.
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[A quote about abrupt weather pattern changes occurring within decades.]

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#1378549 - 06/06/2016 13:22 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
Weatherzone Addict

Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
Dr Reichhelt has an excellent video explaining the nature and extent of this year's event. Very well balanced and without the hysteria seen in other quarters.

One of my biggest concerns from this event is how one of my favorite dive sites on the reef (Acropolis) has faired. Some of the best plate coral formations you'd ever want to see but certainly on the edge of the danger zone and a lot of the coral is very shallow in depth.

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#1394973 - 29/11/2016 11:14 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
Update:

http://mobile.abc.net.au/news/2016-11-29...996?pfmredir=sm

Did you get out for a dive Locke?
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1409267 - 23/02/2017 19:19 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1411587 - 10/03/2017 11:17 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1411605 - 10/03/2017 15:48 Re: Coral Bleaching [Re: Ronfishes]
Weary Offline
Weather Freak

Registered: 07/03/2014
Posts: 858
Loc: Edge Hill, Cairns
http://downloads.gbrmpa.gov.au/files/3i95xze6ys

Video and photos of bleaching taken yesterday
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#1411613 - 10/03/2017 17:54 Re: Coral Bleaching [Re: Ronfishes]
Brett Guy Offline
Weatherzone Addict

Registered: 05/10/2010
Posts: 4822
Loc: Bently Park, Cairns
No photos to show the difference but there is definitely a bit more bleaching at GI this year than last. We must take into account though that last years bleached coral here recovered so there is no cumulative effect and we will just have to wait and see how it recovers this time around.really need a cyclone or two to take some of the heat out of the water though.

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#1411616 - 10/03/2017 18:48 Re: Coral Bleaching [Re: Ronfishes]
Snowy Hibbo Offline
Weather Freak

Registered: 30/12/2016
Posts: 155
Loc: Matlock, Victoria.


Coral bleaching would obviously be occurring in current observations. The POAMA forecast is for cooling over the next month or so. But skill is medium at best beyond a month at this time of year.

The public version of this dataset is here: http://www.bom.gov.au/oceanography/oceantemp/GBR_SST.shtml


Edited by Snowy Hibbo (10/03/2017 18:50)
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#1411619 - 10/03/2017 18:57 Re: Coral Bleaching [Re: Snowy Hibbo]
Weary Offline
Weather Freak

Registered: 07/03/2014
Posts: 858
Loc: Edge Hill, Cairns
Originally Posted By: Snowy Hibbo


Coral bleaching would obviously be occurring in current observations. The POAMA forecast is for cooling over the next month or so. But skill is medium at best beyond a month at this time of year.

The public version of this dataset is here: http://www.bom.gov.au/oceanography/oceantemp/GBR_SST.shtml


No but the unpublic version has a big blob of hot water until the end of march
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#1411624 - 10/03/2017 19:24 Re: Coral Bleaching [Re: Weary]
Snowy Hibbo Offline
Weather Freak

Registered: 30/12/2016
Posts: 155
Loc: Matlock, Victoria.
Originally Posted By: Weary
Originally Posted By: Snowy Hibbo


Coral bleaching would obviously be occurring in current observations. The POAMA forecast is for cooling over the next month or so. But skill is medium at best beyond a month at this time of year.

The public version of this dataset is here: http://www.bom.gov.au/oceanography/oceantemp/GBR_SST.shtml


No but the unpublic version has a big blob of hot water until the end of march

Correct, it will take several months to cool if POAMA has its way.
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#1412669 - 16/03/2017 06:28 Re: Coral Bleaching [Re: Ronfishes]
Ronfishes Offline
Weatherzone Addict

Registered: 25/02/2013
Posts: 3108
Loc: Gordonvale
Poorly written article but has some relevance, ie 'last years news'

http://www.theage.com.au/comment/i-saw-t...308-guu0r0.html
_________________________
MTD: 60.6mm
2016-2017 wet season: 1187.6mm
YTD: 1071.2mm

Opinion is not fact.

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#1412803 - 16/03/2017 18:50 Re: Coral Bleaching [Re: Ronfishes]
Hanrahan Offline
Cloud Gazer

Registered: 11/03/2017
Posts: 27
Loc: Townsville
I'm late to this discussion but for mine, the biggest threat to the GBR is still the crown of thorns starfish.

Bear with me, I'm an old phart who first travelled to the reef [probably Keeper Reef] on the MV Paluma as a boy in the '50s where we viewed it through a glass bottomed boat. As a teenager I snorkelled on it. It was magnificent.

Many years later, after the COT devastation, I swam on the Ribbon Reefs and it was the saddest thing I ever saw. A more recent trip off Townsville showed fair recovery but it was far from it's best.

Worrying about warming will achieve nothing because we can't control it. It is possible we can control the COT so lets renew the research on that which seems to have languished.
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Before the year is out.

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#1413032 - 17/03/2017 21:07 Re: Coral Bleaching [Re: Ronfishes]
BIG T Offline
Weather Freak

Registered: 24/01/2012
Posts: 845
Loc: Albany Creek , QLD
I will be very interested to see how the bleaching goes if we can get a cpl of big monsoon seasons back to back. Just a dumbass personal theory I have.

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#1413254 - 18/03/2017 22:42 Re: Coral Bleaching [Re: Ronfishes]
Locke Offline
Weatherzone Addict

Registered: 27/12/2007
Posts: 4226
Loc: Brisbane
Just returned from a week of diving off Cairns. Saw some evidence of bleaching still but certainly not extensive and no worse than last year.
Spent most of the week on Milne and Flynn Reefs and from what I saw, I'd estimate 5-10% severe bleaching. Managed to get some beautiful photos though of coral that was not visibly bleached.
Still some very warm water around though.

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