rotation curve
rotation curve The observed variation in orbital speed of stars and interstellar matter with distance from the centre of a galaxy. The curve is determined by measuring the Doppler shift of spectral lines at optical, infrared, millimetre, or radio wavelengths. The observed ‘flatness’ of these curves at large radii in many spiral galaxies implies the existence of large amounts of unseen
dark matter beyond the visible regions.
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DROUGHT IN THE UNITED STATES:DONALD A. WILHITE
Transcript from: Congressional Testimony; 4/27/2006; 700+ words
; ...imperative to point out that drought is a normal part of...need to be prepared for droughts, and focus our attention...reduce impacts before drought strikes. On average...1895 to present. This drought record illustrates both...in particular the droughts of the 1930s, 1950s...
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DROUGHT IN THE UNITED STATES:CHET KOBLINSKY
Transcript from: Congressional Testimony; 4/27/2006; 700+ words
; ...Thank you for inviting me to discuss drought conditions in the United States and NOAA`s role in drought research, monitoring, and forecasting...for a variety of phenomena, including drought. In my testimony I will highlight...
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DROUGHT IS WILD CARD IN WATER PLANNING
News Wire article from: United Press International; 7/23/2003; 700+ words
; ...Predicting droughts.) DALLAS, July 23 (UPI) -- Drought is the wild...S. Seasonal Drought Outlook became...who monitor droughts. Both were...recognize that droughts may become more...suffering from drought, the mid...
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Droughts: Less Dramatic, No Less Damaging
Magazine article from: Business and Economic Review; 10/1/2006; ; 700+ words
; ...attention, but droughts can have a powerful...Mizzell. A major drought in 1998-2002...declare official droughts. Criteria have...different stages of drought - incipient, moderate...national integrated drought information system...Senator Jim DeMint. Droughts, like hurricanes...
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The drought monitor
Magazine article from: Bulletin of the American Meteorological Society; 8/1/2002; ; 700+ words
; ...economy during this drought. As a result of recent droughts in the United States...understanding and portraying drought on a map. When tracking...assessing the severity of droughts, some basic questions...How severe is this drought?" For purposes of...
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 "Rocky Mountain News (Denver, CO)")
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'DROUGHT,' AS IT TURNS OUT, IS A LOT OF DIFFERENT THINGS.(City Desk/Local)
Newspaper article from: Rocky Mountain News (Denver, CO); 3/5/2003; ; 700+ words
; ...specifically, agricultural drought refers to a situation when...then you have an agricultural drought,'' said Michael Glantz...perspective.'' INFOBOX 3 different droughts * Meteorological: Defined...called ``socioeconomic'' drought. * Agricultural: Defined...
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DROUGHT MONITORING AND PREPAREDNESS:CHESTER J. KOBLINSKY
Transcript from: Congressional Testimony; 5/4/2006; 700+ words
; ...Thank you for inviting me to discuss drought conditions in the United States and NOAA`s role in drought research, monitoring, and forecasting...for a variety of phenomena, including drought. In my testimony I will highlight...
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Drought reconstructions for the continental United States
Magazine article from: Journal of Climate; 4/1/1999; ; 700+ words
; ...spatial in its design. The drought reconstructions show that the 1930s "Dust Bowl" drought was the most severe such event...since 1700. Other more local droughts are also revealed in the regional patterns of drought obtained by rotated principal...
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DROUGHT MONITORING AND PREPAREDNESS:DONALD A. WILHITE
Transcript from: Congressional Testimony; 5/4/2006; 700+ words
; ...need to be prepared for droughts, and focus our attention...reduce impacts before drought strikes. On average...nation is affected by drought each year, based on...1895 to present. This drought record illustrates both...in particular the droughts of the 1930s, 1950s...
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DROUGHT EMERGENCIES:BOB KERREY
Transcript from: Congressional Testimony; 9/8/1997; 700+ words
; ...prolonged, severe drought at some time in...several severe droughts affecting widely...We have seen that droughts can have repercussions...area afflicted by drought. Nationwide impacts of localized droughts can be great, producing...
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Drought
Encyclopedia entry from: UXL Encyclopedia of Science
...the effects of a drought on the landscape...years. History Droughts have taken place...to 1879, severe droughts in China caused...food. In 1921, a drought along the Volga...worsened the effect of drought in the countries...The unrelenting droughts were the worst those...
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Drought Management
Book article from: Water:Science and Issues
...The incidence of drought in the United States...figure on page 262. Droughts differ from one another...disciplinary perspectives of drought exist. Because of these...definition of agricultural drought should account for the...Hydrological. Hydrological droughts are associated with...
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droughts
Book article from: The Oxford Companion to the Earth
...political dimension to drought amelioration. Seasonal droughts occur in many areas...USA, the European drought of 1976, the Sahelian droughts of North Africa...elapse before a drought is officially declared. Droughts are not abnormal...
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drought
Book article from: The Columbia Encyclopedia, Sixth Edition
...insufficient rainfall. Drought cannot be defined in...Since ancient times droughts have had far-reaching...experienced the worst drought in more than 50 years; more recent severe droughts have afflicted countries...contribute to this drought cycle. Bibliography...
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drought cycle
Book article from: A Dictionary of Ecology
drought cycle A temporary and repetitive phase of drier conditions in an otherwise favourable environment (e.g. the 22-year drought cycles of North American grasslands).
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