| PALEOLIMNOLOGY |
Ground-water processes controlling a prairie lake's response to middle Holocene drought
|
|
Smith, A.J.,Smith, A.J.,Smith, A.J.,Smith, A.J.,Smith, A.J. 1997 Ground-water processes controlling a prairie lake's response
to middle Holocene drought Geology Vol. 25, pp. 391-394
| Data Coverage |
North: 45.86694 * South: 45.86694 |
|
West: -95.80361 * East: -95.80361 |
Data: Please Cite Data Contributors!
|
|
Summary: Lake response to climate forcing is commonly regarded as being controlled by within-lake processes. We present a case from
the northern Great Plains in which Holocene drought response recorded in lake sediments was determined by changes in chemical
characteristics of source ground water. Middle Holocene ostracode assemblages were dominated by halophylic Limnocythere staplini,
indicating increased lake-water salinity, yet the oxygen isotope values in this period decreased by 2 per mil to 3 per mil,
contrary to expectations of evaporative dominance. We infer from these proxy records and ground-water flow-model results that
the paleoclimatic record in the lake was mediated by changes in ground-water catchment area and by reduction in evapotranspiration
accompanying desiccation of peripheral lake basins.
More Info on Paleolimnology |
|
|
Complete XML Record: noaa-lake-6064
(Last Revised: 2009-02-11 )
|
|
 |
DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
325 Broadway, E/CC23
Boulder, CO 80305
USA
|
| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
Fax: 303-497-6513
|
|
