So much for tree rings as a temperature proxy.
Huge Canadian Tree Growth Study.
Our analyses of a new methodologically standardized tree-ring dataset covering Canada’s boreal forest provide insights into the growth responses of this ecosystem to climate change. Although revealing no overarching “growth enhancement” or “growth decline” in recent years, results do point to significant regional- and species-related trends in growth. The observed link between climate variation and growth variability revealed unique evidence of an intensification of the impacts of hydroclimatic variability on growth late in the 20th century, in parallel with the rapid rise of summer temperature.
Such response can be attributed to annual growth variability in these forests being mainly driven by negative sensitivity to summer temperature (warmer summers leading to less growth) and positive sensitivity to summer soil moisture (more moisture leading to more growth)
RSS is one of the two satellite temperature data sets. They show the EL Nino “peak”.
I wonder how far the La Nina will drop?
No surprise for anyone paying attention.
A study published in late April by an environmental group found that Europe’s biofuel regulations created 80 percent more carbon dioxide (CO2) emissions than the conventional oil they replaced. The report estimates the biofuels create new emissions equivalent to putting an extra 12 million cars on the road.
Europe has been blending small percentages of biofuels into conventional gasoline and oil and diesel specifically to reduce CO2 emissions. The continent plans to require biofuels account for 10 percent of all fuel used by 2020. The EU’s CO2 emissions are estimated to have increased by 0.7 percent last year relative to 2014, even though the continent has spent an estimated $1.2 trillion financially supporting green and bio-energy with the goal of lowering CO2 emissions.
Yup. Science is settled.
Scientists astonished to find 600-mile long reef under the muddy water in a site already marked for oil exploration
Scientists were ‘flabbergasted’ to discover the Amazon reef as coral usually thrives in clear, sunlit tropical waters.
A huge 3,600 sq mile (9,300 sq km) coral reef system has been found below the muddy waters off the mouth of the river Amazon, astonishing scientists, governments and oil companies who have started to explore on top of it.
The existence of the 600-mile long reef, which ranges from about 30-120m deep and stretches from French Guiana to Brazil’s Maranhão state, was not suspected because many of the world’s great rivers produce major gaps in reef systems where no corals grow.
In addition, there was little previous evidence because corals mostly thrive in clear, sunlit, salt water, and the equatorial waters near the mouth of the Amazon are some of the muddiest in the world, with vast quantities of sediment washed thousands of miles down the river and swept hundreds of miles out to sea.
But the reef appears to be thriving below the freshwater “plume”, or outflow, of the Amazon. Compared to many other reefs, the scientists say in a paper in Science Advances on Friday, it is is relatively “impoverished”. Nevertheless, they found over 60 species of sponges, 73 species of fish, spiny lobsters, stars and much other reef life.
They try and say the “science is settle”. It never is. Corals adapt. Otherwise they wouldn’t have survived.
Researchers have shown for the first time that some corals surviving bleaching events can acquire and host new types of algae from their environment, which may make the coral more heat-tolerant and enhance their recovery.
The research, published in The ISME Journal, was led by Southern Cross University postgraduate student Ms Nadine Boulotte and included scientists from SCU’s Marine Ecology Research Centre, the University of Melbourne, the Australian Institute of Marine Science (AIMS) and the University of Hawai’i.
“This new study will cause a paradigm shift in our understanding of corals that build reefs,” Ms Boulotte said.
“Most corals were previously believed to only acquire microalgae in their juvenile stage, and to house the same algae types for their lifetime.
“Our study shows for the first time that some adult corals can be promiscuous, and swap their algal partners later in life.
“This algae partner-swapping could help corals to better adapt to climate change and survive bleaching events if they can acquire more heat-tolerant microalgae.”
What a shocker. The climate cycles keep going up and down and so-called global warming” doesn’t change it
Predictions that a warmer climate will lead to more rain for some but longer droughts for others might be wrong, according to a study of 12 centuries worth of data.
The study, published today in science journal Nature, found there was no difference between 20th-century rainfall patterns and those in the pre-industrial era. The findings are at odds with earlier studies suggesting climate change causes dry areas to become drier and wet areas to become wetter.
Fredrik Ljungqvist and colleagues at Stockholm University analysed previously published records of rain, drought, tree rings, marine sediment and ice cores, each spanning at least the past millennium across the northern hemisphere.
They found that the ninth to 11th and the 20th centuries were comparatively wet and the 12th to 19th centuries were drier, a finding that generally accords with earlier model simulations covering the years 850 to 2005.
However, their reconstruction “does not support the tendency in simulations of the 20th century for wet regions to get wetter and dry regions to get drier in a warmer climate”.
“Our reconstruction reveals that prominent seesaw patterns of alternating moisture regimes observed in instrumental data across the Mediterranean, western USA and China have operated consistently over the past 12 centuries,” the paper says.