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Latest Dendrochronology Stories

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2010-12-14 06:25:00

An unprecedented, decades-long combination of heat and drought could be headed to the Southwest United States sometime this century, according to a new study by researchers at the University of Arizona. The scientists reviewed previous studies of temperature changes and droughts in the region over the past 1,200 years, and concluded that a 60-year drought similar to the one that occurred during the 12th Century could be in our future. "Major 20th century droughts pale in comparison to...

83cea68164c21f7a801590ec4134064d1
2010-05-26 09:42:42

Droughts in the late 20th century rival some of North Africa's major droughts of centuries past, reveals new research that peers back in time to the year 1179. The first multi-century drought reconstruction that includes Morocco, Algeria and Tunisia shows frequent and severe droughts during the 13th and 16th centuries and the latter part of the 20th century. An international research team figured out northwest Africa's climate history by using the information recorded in tree rings. The...

81e4072f65e937de78673fe25c53d4e21
2010-04-23 09:45:00

The most detailed picture of at least four epic droughts that Asia has seen in the past 1000 years was found in the study of tree rings, scientists reported on Thursday. Scientists collected data over a 15 year period that they expect will reveal a better understanding of how climate change can unleash large-scale weather disruptions. Severe shifting in the seasonal monsoon rains in Asia, which feed almost half the world's population by producing crop growth, could affect socio-economics in...

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2010-03-30 08:35:00

Evidence suggests changing environment can bring down a civilization Decades of drought, interspersed with intense monsoon rains, may have helped bring about the fall of Cambodia's ancient Khmer civilization at Angkor nearly 600 years ago, according to an analysis of tree rings, archeological remains and other evidence. The study, published this week in the journal Proceedings of the National Academy of Sciences, may also shed light on what drives"”and disrupts"”the rainy season...

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2009-12-04 08:15:11

Isotope analysis provides accurate information The analysis of carbon and oxygen isotopes embedded in tree rings may shed new light on past climate events in the Mackenzie Delta region of northern Canada. Scientists have long looked at the width of tree rings to estimate temperature levels of past years. Larger rings indicate more tree growth in a season, which translates into warmer summer temperatures. But the analysis of carbon and oxygen isotopes in tree rings can also provide accurate...

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2009-11-17 05:55:00

Ancient high-altitude trees grow faster as temperatures rise Increasing temperatures at high altitudes are fueling the post-1950 growth spurt seen in bristlecone pines, the world's oldest trees, according to new research. Pines close to treeline have wider annual growth rings for the period from 1951 to 2000 than for the previous 3,700 years, reports a University of Arizona-led research team. Regional temperatures have increased, particularly at high elevations, during the same 50-year...

2009-07-30 11:14:01

 Scientists are comparing annual growth rings of the Pacific Northwest's largest bivalve and its most iconic tree for clues to how living organisms may have responded to changes in climate.Analyzed by themselves, the rings from a single tree or mollusk may sometimes reflect conditions that are either favorable or unfavorable for growth. When scientists look at numerous individuals of the same species, however, the consistency of the ring patterns allows them to build a model and compare...

2009-07-01 01:06:32

Researchers say baldcypress trees in central Texas provide a record of past weather and clues to the region's future. Malcolm Cleaveland of the University of Arkansas and his team have been taking cores from the trees that show the rings, the Austin American-Statesman reported Tuesday. Each ring represents a year in the tree's life, with thin ones being years of drought and thicker ones those when rainfall was more plentiful. The tree rings give you a perspective you can't get in any other...

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2009-02-17 13:17:37

Researchers are studying data from the tree rings of conifers in Vietnam to reveal new clues into how droughts affected ancient civilizations. The researchers, from the US and Japan, reported their findings at a climate change conference in Dalat on Tuesday. They found that the tree ring samples collected from Fokienia hodginsii, a rare species that lives in Vietnam's cloud forests, revealed drought records for more than 700 years. Brenden M. Buckley said he and his colleagues collected...

2008-09-02 12:00:00

U.S. climate scientists say the Northern Hemisphere's surface temperatures were higher during the past decade than at any time during the last 1,300 years. The researchers said if they include somewhat controversial data derived from tree-ring records, the warming is anomalous for at least 1,700 years. "Some have argued tree-ring data is unacceptable for this type of study," said Penn State Associate Professor Michael Mann. "Now we can eliminate tree rings and still have enough data from...


Word of the Day
vermicular
  • Like a worm in form or movement; vermiform; tortuous or sinuous; also, writhing or wriggling.
  • Like the track or trace of a worm; appearing as if worm-eaten; vermiculate.
  • Marked with fine, close-set, wavy or tortuous lines of color; vermiculated.
  • A form of rusticated masonry which is so wrought as to appear thickly indented with worm-tracks.
This word ultimately comes from the Latin 'vermis,' worm.
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