Abstract
Analyses of pollen and plant macrofossils from a new core spanning the past 60,000 years from Lake Tulane, Florida show a strong antiphase relationship in temperature between Florida and the North Atlantic region. During the Pleistocene, oak-scrub and prairie phases were coeval with long, intense Dansgaard-Oeschger interstadials (warm periods) that initiated Bond cycles. Pine phases were coeval with the North Atlantic long stadials (cold periods) that ended Bond cycles and were terminated by Heinrich events. Lake levels were higher during pine phases, and climate was wetter. However, climate in Florida was also warmer during these phases, which were cold periods in the North Atlantic. Perhaps diminution of thermohaline circulation before and during Heinrich events reduced northward heat transport and retained warmth in the subtropical Atlantic and Gulf of Mexico.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2197-2211 |
| Number of pages | 15 |
| Journal | Quaternary Science Reviews |
| Volume | 25 |
| Issue number | 17-18 |
| DOIs | |
| State | Published - Sep 2006 |
Bibliographical note
Funding Information:We thank H.E. Wright Jr. for reviewing the manuscript; George Denton, Edouard Bard, and Joe Stoner for helpful discussion, and two anonymous reviewers. Chris Dorion helped with coring, and Pietra Mueller greatly assisted with field and lab work. Landowners Paul and Justine Devlin graciously provided access to Lake Tulane. Support received from NSF grants ATM-9405145 to E.C. Grimm and ATM-9321265 to G.L. Jacobson.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.