Drought and instability
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Coca-Cola touts new ‘Ekocenters’ for water, medicine and WiFi

Coca-Cola touts new ‘Ekocenters’ for water, medicine and WiFi | Drought and instability | Scoop.it
Coca-Cola recently announced plans to deploy Ekocenters in developing communities in Africa, Asia, Latin America and North America. These one-stop shops will offer clean ...
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Waco rainfall the exception in Texas drought - Waco Tribune-Herald (blog)

Waco rainfall the exception in Texas drought - Waco Tribune-Herald (blog) | Drought and instability | Scoop.it
Waco rainfall the exception in Texas drought
Waco Tribune-Herald (blog)
The latest National Weather Service drought statement has good news and bad news.
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Shale Drillers Offered Water Cheaper Than U.K. Residents - Bloomberg

Shale Drillers Offered Water Cheaper Than U.K. Residents - Bloomberg | Drought and instability | Scoop.it
Shale Drillers Offered Water Cheaper Than U.K.
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1600 Attend PSC Hearings on Haverstraw Desalination Plant

1600 Attend PSC Hearings on Haverstraw Desalination Plant | Drought and instability | Scoop.it
by Gale Pisha Approximately 1600 people attended the New York State Public Service Commission (PSC) hearings in Rockland County last week regarding United Water’s proposed Haverstraw desalination plant.
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In a Hot, Thirsty Energy Business, Water Is Prized - New York Times

In a Hot, Thirsty Energy Business, Water Is Prized - New York Times | Drought and instability | Scoop.it
New York Times In a Hot, Thirsty Energy Business, Water Is Prized New York Times WITH so much focus on carbon emitted from the nation's power plants, another environmental challenge related to electricity generation is sometimes overlooked: the...
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Qatar's QEWC Signs $450m Finance Deal For Desalination Plant ...

Qatar's QEWC Signs $450m Finance Deal For Desalination Plant ... | Drought and instability | Scoop.it
The plant, when completed, will produce 10 per cent of the Gulf country's water.
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Renewables-based Desalination: A Solution to MENA's Water Crisis

Renewables-based Desalination: A Solution to MENA's Water Crisis | Drought and instability | Scoop.it
"You never miss the water till the well runs dry" is an old idiom that is becoming a harsh reality for the Middle East and North Africa region and globally. Water scarcity is now this century's imminent greatest problem, a clear ...
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Permanent, Devastating Corn Belt Drought Brings All Time Record Crop

Permanent, Devastating Corn Belt Drought Brings All Time Record Crop | Drought and instability | Scoop.it
USDA is now estimating total 2013 corn production at 13.8 billion bushels, which if realized, would result a new record for annual U.S. corn production September 2013 USDA Crop Production summary |...
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Forests worldwide near tipping-point from drought, study finds

Forests worldwide near tipping-point from drought, study finds | Drought and instability | Scoop.it

Forests worldwide are at "equally high risk" to die-off from drought conditions, warns a new study published this week in the journal Nature. The study, conducted by an international team of scientists, assessed the specific physiological effects of drought on 226 tree species at 81 sites in different biomes around the world. It found that 70 percent of the species sampled are particularly vulnerable to reduction in water availability. With drought conditions increasing around the globe due to climate change and deforestation, the research suggests large swathes of the world's forests — and the services they afford — may be approaching a tipping point.

 

Water is critical to trees, transporting nutrients, providing stabilizing, and serving as a medium for the metabolic processes that generate the energy needed for a tree to survive. Mechanically, water moves through plants via their xylem, a tissue that can be compared to a system of tubes. Transpiration or release of water from a plant's leaves keeps the system moving. But when water availability is insufficient, the process begins to break down, having substantial impacts on the health of a tree. While this has long been observed, until recently the exact mechanism that triggers drought stress in forests was poorly understood. The new study argues that "hydraulic failure" may be a key factor. Effectively, insufficient water availably leads a tree to start pulling air bubbles — called gas emboli — into its xylem impeding the flow of water. Hydraulic failure is akin to attempting to drink through a broken straw — air bubbles significantly reduce the amount of liquid that reaches the top of the straw.

 

The researchers found that a wide range of trees are susceptible to "hydraulic failure". "We show that 70% of 226 forest species from 81 sites worldwide operate with narrow... hydraulic safety margins against injurious levels of drought stress and therefore potentially face long-term reductions in productivity and survival if temperature and aridity increase as predicted for many regions across the globe," the authors write. "Safety margins are largely independent of mean annual precipitation, showing that there is global convergence in the vulnerability of forests to drought, with all forest biomes equally vulnerable to hydraulic failure regardless of their current rainfall environment."

 

The results provide insight on why drought-induced forest die-off is occurring in a range of forest types, including tropical rainforests which are not typically considered at risk of drought. Over the past 15 years, forests in Borneo and the Amazon have suffered from widespread drought-induced decline. Drought stress if often accompanied by increased incidence of fires, either from natural sources like lightning or human activities like burning for cattle pasture of plantation establishment.


Via Dr. Stefan Gruenwald
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Lauri's curator insight, August 3, 2013 8:11 PM

If we lose our forests, we are well and truly screwed.

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CRS World Report: Fighting Cycles of Drought in Senegal

CRS World Report: Fighting Cycles of Drought in Senegal | Drought and instability | Scoop.it
PODCAST: A CRS program helps farmers grow better crops to stop the vicious cycle of poverty and hunger caused by drought.
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Water holds key to sustainable development, UN chief tells Budapest summit - UN News Centre

Water holds key to sustainable development, UN chief tells Budapest summit - UN News Centre | Drought and instability | Scoop.it
UN News Centre Water holds key to sustainable development, UN chief tells Budapest summit UN News Centre 8 October 2013 – Secretary-General Ban Ki-moon today stressed the vital role of water in sustainable development, highlighting in particular...
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Veolia Environnement | Seawater desalination

Veolia Environnement | Seawater desalination | Drought and instability | Scoop.it
Desalination of sea water makes it possible to increase the freshwater resources available and provide a solution in case of drought.
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Drought may hit Nigeria, others – World Bank - Nigeria Business News

Drought may hit Nigeria, others – World Bank - Nigeria Business News | Drought and instability | Scoop.it
The World Bank has said drought may hit some parts of Africa, including Nigeria, between now and 2015.
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Desalination: Developing Fresh Water Resources in Qatar ...

Desalination: Developing Fresh Water Resources in Qatar ... | Drought and instability | Scoop.it
Qatar has one of the fastest growing economies in the world. Revenues from the mid 20th century discovery of oil are primarily responsible for its recent economic growth. Qatar has experienced a population expansion from ...
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UT Law | Energy Center | Edwards Aquifer and Desalination

Texas groundwater districts are grappling with thedifficult task of meeting mounting demands and preserving long-term supplies even as the recent Bragg decision has cast uncertainty over their regulatory authority.
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Scientists developing a seawater-desalination chip - Gizmag

Scientists developing a seawater-desalination chip - Gizmag | Drought and instability | Scoop.it
A device known as the water chip uses electricity to remove salt from seawater.
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