T214 Interhemispheric Records of Paleoclimate Change: Low Latitude Influences on the High Latitudes, or the Other Way Around, in Pole-Equator-Pole Syntheses
Wednesday, 5 November 2003
8:00 AM - 12:00 PM
TROPICAL – EXTRATROPICAL LINKAGES IN PATTERNS OF CLIMATE VARIABILITY
Paper number: T214-2
Program: Technical Sessions
Time: 8:15 AM – 8:35 AM
Authors
Abstract
The observational record of modern climate variability provides evidence that recurring, prominent patterns (hereafter called modes) of climate variability in the midlatitudes are influenced by forcing from the tropics, and vice versa. I will summarize the observational and modeling evidence that demonstrates the North Atlantic Oscillation/Arctic Oscillation (NAO/AO) and Pacific North American Patterns (PNA) are influenced by forcing from the tropics (e.g., by El Nino/Southern Oscillation; ENSO), and that the tropical modes of variability (ENSO and TAV – aka the Tropical Atlantic dipole) are influenced by the midlatitudes.
I will then discuss the arguments for the robustness of these linkages through the Holocene, and – time permitting – how they might be different during Glacial Times.