Accession Number : ADP007347
Title : Spatial and Temporal Characteristics of the Little Ice Age: The Antarctic Ice Core Record,
Corporate Author : OHIO STATE UNIV COLUMBUS
Personal Author(s) : Mosley-Thompson, Ellen ; Thompson, Lonnie G.
Report Date : MAR 1992
Pagination or Media Count : 5
Abstract : Recently, ice core records from both hemispheres, in conjunction with other proxy records (e.g., tree rings, speleothems and corals), have shown that the Little Ice Age (LIA) was spatially extensive, extending to the Antarctic. This paper examines the temporal and spatial characteristics of the dust and delta 18O information from Antarctic ice cores. Substantial differences exist in the records. For example, a 550-year record of delta 18O and dust concentrations from Siple Station, Antarctica suggests that warmer, less dusty conditions prevailed from A.D. 1600 to 1830. Alternately, dust and delta 18O data from South Pole Station indicate that opposite conditions (e.g., cooler and more dusty) were prevalent during the LIA. Three additional Antarctic delta 18O records are integrated with the Siple and South Pole histories for a more comprehensive picture of LIA conditions. The records provide additional support for the LIA temperature opposition between the Antarctic Peninsula region and East Antarctica. In addition, periods of strongest LIA cooling are not temporally synchronous over East Antarctica. These strong regional differences demonstrate that a suite of spatially distributed, high resolution ice core records will be necessary to characterize the LIA in Antarctica.
Descriptors : *CORES, *DUST, *ICE, *ANTARCTIC REGIONS, ADDITION, COOLING, HEMISPHERES, HIGH RESOLUTION, PENINSULAS, PICTURES, RECORDS, REGIONS, RESOLUTION, RINGS, STATIONS, TEMPERATURE, TREES, SYMPOSIA, SURFACE TEMPERATURE.
Subject Categories : Geography
Snow, Ice and Permafrost
Distribution Statement : APPROVED FOR PUBLIC RELEASE