Sunday, July 10, 2016
Now it's mangroves (persongroves?)
All bad things are caused by global warming. That seems to be the orthodoxy. Evidence be damned. Warmists are like the people who see UFO's ..... every light in the sky is a UFO. So coral bleaching in 2015 was due to global warming; kelp dieback was due to global warming and now dieback among some mangroves in Northern Australia is due to global warming. And, as we all surely know, global warming is caused by increasing levels of CO2 in the atmosphere. As CO2 increases, so we get hotter. So if all these diebacks were caused by a warming globe, CO2 levels should have been shooting up, right?
Fortunately the guy below can pinpoint the time when the mangroves died off. He says it happened "in September-October 2015". So CO2 levels should have shot up around that time, right? In fact, 2015 was the one year in which CO2 levels stagnated. 2015 CO2 levels at Mauna Loa just fluctuated up and down from month to month around the 400ppm mark. See the record below, a screen grab from Mauna Loa.
The 4th column is the actual average CO2 level in ppm. So, far from shooting up, CO2 was in stasis. So any warming CANNOT be attributed to a CO2 rise. Dr Norm Duke is talking through his anus. There WAS warming in 2015 but that was due to El Nino. It cannot have been due to a CO2 rise, because there wasn't any
Close to 10,000 hectares of mangroves have died across a stretch of coastline reaching from Queensland to the Northern Territory.
International mangroves expert Dr Norm Duke said he had no doubt the "dieback" was related to climate change.
"It's a world-first in terms of the scale of mangrove that have died," he told the ABC.
Dr Duke flew 200 kilometres between the mouths of the Roper and McArthur Rivers in the Northern Territory last month to survey the extent of the dieback.
He described the scene as the most "dramatic, pronounced extreme level of dieback that I've ever observed".
Dr Duke is a world expert in mangrove classification and ecosystems, based at James Cook University, and in May received photographs showing vast areas of dead mangroves in the Northern Territory section of the Gulf of Carpentaria.
Until that time he and other scientists had been focused on mangrove dieback around Karmuba, Queensland, at the opposite end of the Gulf.
"The images were compelling. They were really dramatic, showing severe dieback of mangrove shoreline fringing — areas just extending off into infinity," Dr Duke said.
"Certainly nothing in my experience had prepared me to see images like that."
Dr Duke said he wanted to discover if the dieback in the two states was related. "We're talking about 700 kilometres of distance between incidences at that early time," he said.
The area the Northern Territory photos were taken in was so remote the only way to confirm the extent and timing of the mangrove dieback was with specialist satellite imagery.
With careful analysis the imagery confirmed the mangrove dieback in both states had happened in the space of a month late last year, coincident with coral bleaching on the Great Barrier Reef.
"We're talking about 10,000 hectares of mangroves were lost across this whole 700 kilometre span," Dr Duke said. "It's not only unprecedented, it's extensive, it's severe and it's noticeable.
"I have not seen such imagery anywhere before, from all over the world. I work in many places around the world and I look at damaged mangroves as part of my work all the time. These are the most shocking images of dieback I've ever seen."
Dr Duke flew to the Northern Territory in June to judge the physical extent of the mangroves' damage. With the support of the NT Parks and Wildlife Commission he flew in a helicopter between the mouths of the Roper and McArthur Rivers.
What is causing the 'dieback'?
Dr Duke said the cause of such extensive damage was not immediately evident.
"Like a large oil spill, like a cyclone or severe storm — none of those things had occurred in the region in recent times," he said.
"But in that mix of things that were going on at the same time we're starting to hear about coral bleaching ... [and] hot water on the east coast."
The coincident timing of coral bleaching on the Great Barrier Reef and the dieback of mangroves in the north led Dr Duke to look at climatic factors.
"I started hearing that the wet season was missing from the Northern Territory over that time period," he said. "The wet season was only one-month-long in the year before. Usually the wet season in the Northern Territory in that area is three or four months long," Dr Duke said.
He said he was convinced unusually low rainfall in the 2014 wet season and elevated temperatures led to the massive mangrove dieback. He said a deadly lack of fresh water and increased water and atmospheric temperatures stressed the plants beyond their tolerance.
Satellite imagery pinpoints the damage to a period of around four weeks in September-October 2015.
Posted by John J. Ray (M.A.; Ph.D.).