The magnitude and proximate cause of ice-sheet growth since 35,000 yr B.P.
Quaternary Research
By: I.J. Winograd
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Abstract
The magnitude of late Wisconsinan (post-35,000 yr B.P.) ice-sheet growth in the Northern Hemisphere is not well known. Ice volume at ???35,000 yr B.P. may have been as little as 20% or as much as 70% of the volume present at the last glacial maximum (LGM). A conservative evaluation of glacial-geologic, sea level, and benthic ??18O data indicates that ice volume at ???35,000 yr B.P. was approximately 50% of that extant at the LGM (???20,000 yr B.P.); that is, it doubled in about 15,000 yr. On the basis of literature for the North Atlantic and a sea-surface temperature (SST) data compilation, it appears that this rapid growth may have been forced by low-to-mid-latitude SST warming in both the Atlantic and Pacific Oceans, with attendant increased moisture transport to high latitudes. The SST ice-sheet growth notion also explains the apparent synchroneity of late Wisconsinan mountain glaciation in both hemispheres.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The magnitude and proximate cause of ice-sheet growth since 35,000 yr B.P. |
| Series title | Quaternary Research |
| DOI | 10.1006/qres.2001.2272 |
| Volume | 56 |
| Issue | 3 |
| Year Published | 2001 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Quaternary Research |
| First page | 299 |
| Last page | 307 |
| Google Analytic Metrics | Metrics page |