Drought
hideA drought is an extended period of months or years when a region notes a deficiency in its water supply. Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region. Although droughts can persist for several years, even a short, intense drought can cause significant damage and harm the local economy. This global phenomenon has a widespread impact on agriculture. The United Nations estimates that an area of fertile soil the size of Ukraine is lost every year because of drought, deforestation, and climate instability. Lengthy periods of drought have long been a key trigger for mass migration and played a key role in a number of ongoing migrations and other humanitarian crises in the Horn of Africa and the Sahel.
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News tagged with drought
Peat fires drive temperatures up
Nov 30, 2009 |
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Peatlands, especially those in tropical regions, sequester gigantic amounts of organic carbon. Human activities are now having a considerable impact on these wetlands. For example, drainage projects, in combination with the ...
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Venezuela turns to cloud-seeding to battle drought
Space & Earth / Earth Sciences
Nov 29, 2009 |
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(AP) -- Hugo Chavez says he is starting to "bombard" clouds now that Cuba has provided Venezuela with cloud-seeding help in an effort to produce rain and alleviate the effects of a severe drought.
Researchers find long awaited key to creating drought resistant crops
Dec 03, 2009 |
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Van Andel Research Institute (VARI) researchers have determined precisely how the plant hormone abscisic acid (ABA) works at the molecular level to help plants respond to environmental stresses such as drought and cold. ...
When roots lose contact
Nov 30, 2009 |
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Plant roots can shrink as a result of water deficit and lose contact with the surrounding soil. This effect has been suspected for a long time, but has only now been demonstrated for a fact with the help of ...
Maryland Farmer grows plants for green roofs around nation
Dec 02, 2009 |
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It is a crisp fall day on Emory Knoll Farms as John Shepley stops at a raspberry bush, picks a few berries and pops them into his mouth on his walk to the greenhouses.
Researchers look at water-energy impacts of climate change
Dec 01, 2009 |
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(PhysOrg.com) -- Climate projections for the next 50 to 100 years forecast increasingly frequent severe droughts and heat waves across the American Southwest, sinking available water levels even as rising mercury drives up ...
Greenhouse gas carbon dioxide ramps up aspen growth
Dec 04, 2009 |
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The rising level of atmospheric carbon dioxide may be fueling more than climate change. It could also be making some trees grow like crazy.
Texas AgriLife researchers working to develop heartier, better-adapted crops
Dec 04, 2009 |
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Dr. Daniel Leskovar, a Texas AgriLife Research plant physiologist at the Texas AgriLife Research and Extension Center in Uvalde, has been investigating ways to help vegetable plants make a less stressful transition from the ...
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