HR: 0800h
AN: GC51D-1068    [Abstracts]
TI: The NAO, the AO, and Global Warming: How Closely Related?
AU: * Cohen, J L
EM: jcohen@aer.com
AF: AER, Inc., 131 Hartwell Avenue, Lexington, MA 02421 United States
AU: Barlow, M
EM: mbarlow@aer.com
AF: AER, Inc., 131 Hartwell Avenue, Lexington, MA 02421 United States
AB: The North Atlantic Oscillation (NAO) and closely related Arctic Oscillation (AO) strongly affect Northern Hemisphere (NH) surface temperatures with patterns similar to the global warming trend. The NAO and AO have been in a positive trend for much of the 1970s and 1980s with historic highs in the early 1990s, and it has been suggested that they contribute significantly to the global warming signal. We examine the trends in standard indices of the AO, NAO, and NH average surface temperature for Dec-Feb, 1950 through 2004, and the associated patterns in surface temperature anomalies. We also examine factors previously identified as relating to the NAO, AO, and their positive trend: North Atlantic sea surface temperatures (SSTs), Indo-Pacific warm pool SSTs, stratospheric circulation, and Eurasian snow cover.
DE: 3322 Land/atmosphere interactions
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
DE: 3362 Stratosphere/troposphere interactions
DE: 1610 Atmosphere (0315, 0325)
DE: 1620 Climate dynamics (3309)
SC: Global Climate Change [GC]
MN: 2004 AGU Fall Meeting