Sunday, May 31, 2015
© Saturday, May 30, 2015
Civil Aviation Unveils Design For New Cayman Air Terminal
The Cayman Islands Airports Authority (CIAA) has unveiled the interior conceptual drawings for the multi-million dollar expansion project at Owen Roberts International Airport (ORIA).
Commenting on the design created by Florida based firm RS&H Group, CIAA’s CEO Albert Anderson said, “The interior design is very impressive and I am confident that once completed the new expanded airport will be a first-class terminal facility
The CI$55 million expansion project should take around three years to complete and will nearly triple the current space at the airport. Construction on the first phase of the project is expected to begin this summer.
Here is the Cayman Islands Government's chance to save money and show their support for alternative energy. Covering the roof and parking lots with solar panels, and using LED lighting would set an example for Caymanians and Caymanian businesses to follow. Editor
Thursday, May 28, 2015
Global climate on verge of multi-decadal change
A new study, by scientists from the University of Southampton and National Oceanography Centre (NOC), implies that the global climate is on the verge of broad-scale change that could last for a number of decades.
The change to the new set of climatic conditions is associated with a cooling of the Atlantic, and is likely to bring drier summers in Britain and Ireland, accelerated sea-level rise along the northeast coast of the United States, and drought in the developing countries of the Sahel region. Since this new climatic phase could be half a degree cooler, it may well offer a brief reprise from the rise of global temperatures, as well as resulting in fewer hurricanes hitting the United States.
The study, published today in Nature, proves that ocean circulation is the link between weather and decadal scale climatic change. It is based on observational evidence of the link between ocean circulation and the decadal variability of sea surface temperatures in the Atlantic Ocean.
Lead author Dr Gerard McCarthy, from the NOC, said: "Sea-surface temperatures in the Atlantic vary between warm and cold over time-scales of many decades. These variations have been shown to influence temperature, rainfall, drought and even the frequency of hurricanes in many regions of the world. This decadal variability, called the Atlantic Multi-decadal Oscillation (AMO), is a notable feature of the Atlantic Ocean and the climate of the regions it influences."
These climatic phases, referred to as positive or negative AMO's, are the result of the movement of heat northwards by a system of ocean currents. This movement of heat changes the temperature of the sea surface, which has a profound impact on climate on timescales of 20-30 years. The strength of these currents is determined by the same atmospheric conditions that control the position of the jet stream. Negative AMO's occur when the currents are weaker and so less heat is carried northwards towards Europe from the tropics.
The strength of ocean currents has been measured by a network of sensors, called the RAPID array, which have been collecting data on the flow rate of the Atlantic meridonal overturning circulation (AMOC) for a decade.
Dr David Smeed, from the NOC and lead scientist of the RAPID project, adds: "The observations of AMOC from the RAPID array, over the past ten years, show that it is declining. As a result, we expect the AMO is moving to a negative phase, which will result in cooler surface waters. This is consistent with observations of temperature in the North Atlantic."
Since the RAPID array has only been collecting data for last ten years, a longer data set was needed to prove the link between ocean circulation and slow climate variations. Therefore this study instead used 100 years of sea level data, maintained by the National Oceanography Centre's permanent service for mean sea level. Models of ocean currents based on this data were used to predict how much heat would be transported around the ocean, and the impact this would have on the sea surface temperature in key locations.
Co-author Dr Ivan Haigh, lecturer in coastal oceanography at the University of Southampton, said: "By reconstructing ocean circulation over the last 100 years from tide gauges that measure sea level at the coast, we have been able to show, for the first time, observational evidence of the link between ocean circulation and the AMO." More
Monday, May 25, 2015
Deciphering clues to prehistoric climate changes locked in cave deposits
It turns out that the steady dripping of water deep underground can reveal a surprising amount of information about the constantly changing cycles of heat and cold, precipitation and drought in the turbulent atmosphere above. The analysis of a stalagmite from a cave in north east India can detect the link between El Nino conditions in the Pacific Ocean and the Indian monsoon, a new study has found.
When the conversation turns to the weather and the climate, most people’s thoughts naturally drift upward toward the clouds, but Jessica Oster’s sink down into the subterranean world of stalactites and stalagmites.
That is because the assistant professor of earth and environmental sciences at Vanderbilt University is a member of a small group of earth scientists who are pioneering in the use of mineral cave deposits, collectively known as speleothems, as proxies for the prehistoric climate.
It turns out that the steady dripping of water deep underground can reveal a surprising amount of information about the constantly changing cycles of heat and cold, precipitation and drought in the turbulent atmosphere above.
As water seeps down through the ground it picks up minerals, most commonly calcium carbonate. When this mineral-rich water drips into caves, it leaves mineral deposits behind that form layers which grow during wet periods and form dusty skins when the water dries up.
Today, scientists can date these layers with extreme precision based on the radioactive decay of uranium into its daughter product thorium. Variations in the thickness of the layers is determined by a combination of the amount of water seeping into the cave and the concentration of carbon dioxide in the cave’s atmosphere so, when conditions are right, they can provide a measure of how the amount of precipitation above the cave varies over time. By analyzing the ratios of heavy to light isotopes of oxygen present in the layers, the researchers can track changes in the temperature at which the water originally condensed into droplets in the atmosphere changes and whether the rainfall’s point of origin was local or if traveled a long way before falling to the ground.
The value of this information is illustrated by the results of a study published May 19 in the journal Geophysical Research Letters by Oster’s group, working with colleagues from the Berkeley Geochronology Center, the Smithsonian Institution National Museum of Natural History and the University of Cambridge titled “Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India.”
In the study, Oster and her team made a detailed record of the last 50 years of growth of a stalagmite that formed in Mawmluh Cave in the East Khasi Hills district in the northeastern Indian state of Meghalaya, an area credited as the rainiest place on Earth.
Studies of historical records in India suggest that reduced monsoon rainfall in central India has occurred when the sea surface temperatures in specific regions of the Pacific Ocean were warmer than normal. These naturally recurring sea surface temperature “anomalies” are known as the El Niño Modoki, which occurs in the central Pacific, and the Pacific Decadal Oscillation, which takes place in the northern Pacific. (By contrast, the historical record indicates that the traditional El Niño, which occurs in the eastern Pacific, has little effect on rainfall levels in the subcontinent.)
When the researchers analyzed the Mawmluh stalagmite record, the results were consistent with the historical record. Specifically, they found that during El Niño Modoki events, when drought was occurring in central India, the mineral chemistry suggested more localized storm events occurred above the cave, while during the non-El Niño periods, the water that seeped into the cave had traveled much farther before it fell, which is the typical monsoon pattern.
“Now that we have shown that the Mawmluh cave record agrees with the instrumental record for the last 50 years, we hope to use it to investigate relationships between the Indian monsoon and El Niño during prehistoric times such as the Holocene,” said Oster.
The Holocene Climate Optimum was a period of global climate warming that occurred between six to nine thousand years ago. At that time, the global average temperatures were somewhere between four to six degrees Celsius higher than they are today. That is the range of warming that climatologists are predicting due to the build-up of greenhouse gases in the atmosphere from human activity. So information about the behavior of the monsoon during the Holocene could provide clues to how it is likely to behave in the future. This knowledge could be very important for the 600 million people living on the Indian subcontinent who rely on the monsoon, which provides the area with 75 percent of its annual rainfall.
“The study actually grew out of an accidental discovery,” said Oster. Vanderbilt graduate student Chris Myers visited the cave, which co-author Sebastian Breitenbach from Cambridge has been studying for several years, to see if it contained enough broken speleothems so they could use them to date major prehistoric earthquakes in the area.
Myers found a number of columns that appear to have broken off in the magnitude 8.6 earthquake that hit Assam, Tibet in 1950. But he also discovered a number of new stalagmites that had begun growing on the broken bases. When he examined these in detail he found that they had very thick layers and high concentrates of uranium, which made them perfect for analysis.
Because of the large amount of water running into the cave, the stalagmite they choose to analyze had grown about 2.5 centimeters in 50 years. (If that seems slow, compare it with growth rates of a few millimeters in a thousand years found in caves in arid regions like the Sierra Nevada.) As a result, the annual layers averaged about 0.4 millimeters thick — wide enough for the researchers to get seven to eight samples per layer, which is slightly better than one measurement every two months. The amount of information about the climate that scientists can extract from the stalagmites and stalactites in a cave is amazing. But the value of this approach increases substantially as the number of caves that can act as climate proxies increases.
It is not a simple task. Because each cave is unique, the scientists have to study it for several years before they understand it well enough to use it as a proxy. For example, they must establish how long it takes water to move from the surface down to the cave, a factor that can vary from days to months.
Efforts to use the mineral deposits in caves as climate proxies began in the 1990’s. Currently, there are only a few dozen scientists who are pursuing this line of research and they have analyzed the mineral deposits from 100 to 200 caves in this fashion.
Story Source:
The above story is based on materials provided by Vanderbilt University. The original article was written by David Salisbury. Note: Materials may be edited for content and length.
Journal Reference:
- Christopher G. Myers, Jessica L. Oster, Warren D. Sharp, Ralf Bennartz, Neil P. Kelley, Aaron K. Covey, Sebastian F.M. Breitenbach. Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India. Geophysical Research Letters, 2015; DOI: 10.1002/2015GL063826
Saturday, May 16, 2015
Weak climate deal would jeopardise new development goals - experts - TRFN
LONDON, May 15 (Thomson Reuters Foundation) - The world's chances of achieving new international development goals will be slim without more ambitious action to curb climate change, researchers said.
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| Dr. Ulric 'Neville' Trotz |
Pakistan, for example, is unlikely to be able to end poverty by 2030 if accelerating climate change brings worse weather disasters, water scarcity and other problems, a new report from the UK-based Climate and Development Knowledge Network said.
But if global warming is held to 2 degrees Celsius - the aim of negotiations toward a new U.N. climate deal at the end of the year in Paris - Pakistan would have only a "low" risk of failing to eradicate poverty, the report said.
Planned new sustainable development goals (SDGs) aimed at ending poverty, improving gender equality, and giving access to water and clean power have a much higher chance of being achieved if action to limit climate change is ambitious, the report's authors said.
But if weaker efforts on climate change put the world on track for a 3 to 5 degree Celsius temperature rise, Asia and sub-Saharan Africa could see poverty rates 80 percent to 140 percent higher, the report found.
If the new sustainable development goals, expected to be agreed in New York in September, have strong targets, they could lift ambition in the year-end climate deal, the report said.
"There's a simple message: Climate action is developmental action," said Ulric "Neville" Trotz, a science advisor at the Caribbean Community Centre for Climate Change in Belize.
Countries need to fully incorporate climate action into national development plans, he added.
The report, by a team of economic policy and development experts, is one of the first attempts to put rough numbers on how the two new global deals due this year on climate change and sustainable development might interact.
States are negotiating over a proposal for 17 new sustainable development goals, backed by 169 targets, focused on everything from reducing inequality, hunger and climate change to managing forests and oceans better and promoting sustainable economic growth.
At the climate negotiations in December, leaders will aim to put in place an agreement, which would take effect in 2020, to curb carbon emissions and help poorer countries adapt to climate change and adopt a cleaner development path.
ZERO POVERTY, ZERO EMISSIONS
There are huge areas of overlap, experts say, not least because climate change impacts - such as water insecurity and more weather-related disasters - can cut harvests and incomes, and lead to children leaving school, as well as forcing governments to divert development funds to disaster relief.
"There's a simple message: Climate action is developmental action," said Ulric "Neville" Trotz, a science advisor at the Caribbean Community Centre for Climate Change in Belize.
Investing in cleaner, cheaper energy could not only cut climate risks but also improve health and provide the power needed to spur economic growth, the researchers said.
Many Caribbean islands, for example, rely on expensive imported fossil fuels, making their economies uncompetitive.
They are also extremely vulnerable to climate-related impacts, such as sea-level rise and stronger storms, said economist Anil Markandya, one of the report's authors.
"Unless we change the architecture of our energy sector, we might as well forget development under the SDGs," Trotz said.
Funding that change would require international support, such as from the new Green Climate Fund (GCF), he added.
Andrea Ledward, head of climate and environment for Britain's Department of International Development and a GCF board member, told a launch event for the report there is a need to "break down the firewall" between funding for climate and development projects because the two areas are so closely tied.
Rich nations have committed to mobilise by 2020 an annual $100 billion in climate finance that is "new and additional" to existing funding.
Jonathan Reeves of the International Institute for Environment and Development said that while climate and development funding streams could be merged, the accounting must be kept separate to ensure the money is "new and additional".
He warned that the least-developed countries have the most to lose if efforts to address climate change fail.
"If your country is going to be submerged within a couple of generations by sea-level rise, you're not even going to be thinking about achieving the SDGs," he said.
Ilmi Granoff, a researcher with the Overseas Development Institute in London, said public support for an ambitious climate deal and strong sustainable development targets could be won by focusing on a new, understandable aim for all countries: "zero poverty and zero emissions within a generation". (Reporting by Laurie Goering; editing by Megan Rowling) More
Monday, May 11, 2015
Superadobe/Earthbag Orphanage Withstands Nepal Earthquake
Cal-Earth Low-cost Sustainable Earthen Housing Solutions Proved Effective and Safe in Earthquakes
Hesperia, Calif., May 5, 2015 -- Cal-Earth Institute today announced they received confirmation that the Superadobe/Earthbag orphanage project built for the Pegasus Children’s Project in the northern Khathmandu valley in Nepal survived the 7.6 magnitude earthquake on 25 April 2015, and the structures are all still standing.
The Superadobe (sandbags/barbed wire) building system developed at Cal-Earth (U.S. Patent #5,934,027) integrates traditional earth architecture with contemporary global safety requirements, and passes severe earthquake code tests in California. The technology has been published by NASA, endorsed by the United Nations, featured in countless world media outlets, and awarded the prestigious Aga Khan Award for Architecture in 2004.
A UK organization, Small Earth, built over 40 domes in 2006 for the Pegasus Children’s Project in Nepal, which is home to over 90 children and their caretakers, all of who are confirmed safe after the earthquake. Trained by a Cal-Earth alumni in 2005, Small Earth’s founder, Julian Faulkner, shared the news: "The domes have come through relatively unscathed with just surface cracking to the plasterwork… in the village below the site 15 houses have collapsed and many others are badly damaged with all the villagers now sleeping under tarpaulins in the fields."
Faulkner stated the superficial damage to the buildings is a "testament to the quality of training we received that has enabled us to further develop the technology for use in climates as diverse as the temperate UK, the monsoon-drenched Himalayas and the African savannah." Pegasus is raising funds to rebuild a brick structure that was destroyed during the quake, but feel validated in their choice to build earthbag domes to withstand the extreme conditions.
The Cal-Earth organization is dedicated to addressing the pressing needs of all the Earth’s homeless population and displaced people. The global housing shortage currently includes some 20-40 million refugees and displaced persons, and hundreds of millions more who live in substandard or slum housing. With compounding environmental challenges and the acceleration of natural and man-made disasters, this shortage will only become more severe in the coming decades. Cal-Earth believes the time to act is now, in order to ensure that everyone has a safe and sustainable place to live.
Cal-Earth is responding to the growing need to educate people in the face of compounding environmental challenges and the acceleration of natural and man-made disasters. On May 11, 2015, Cal-Earth will launch its first online class for download and streaming: Introduction to Superadobe. Cal-Earth is working toward raising addition funding to create more online content so that anyone, from anywhere, will be able to learn sustainable earth architecture in person or online. More
About Cal-Earth
Cal-Earth, the California Institute of Earth Art and Architecture, is a 501 (c)(3) nonprofit organization committed to providing solutions to the human need for shelter through research, development, and education in earth architecture. Cal-Earth envisions a world in which every person is empowered to build a safe and sustainable home with their own hands, using the earth under their feet. Currently, Cal-Earth reaches over 1.5 million through worldwide outreach and social media, in addition to more than 1,500 visitors who come to the Hesperia site annually for workshops and tours.
http://www.pegasuschildren.btck.co.uk
http://tinyurl.com/CalEarthKCET
Media Contact:
Sheefteh Khalili
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