HR: 14:35h
AN: SH33C-04 INVITED     [Abstracts]
TI: Estimate solar contribution to the global surface warming using the ACRIM TSI satellite composite.
AU: * Scafetta, N
EM: ns2002@duke.edu
AF: Duke University, Physics Department, Durham, NC 27708 United States
AU: West, B J
EM: Bruce.J.West@us.army.mil
AF: Duke University, Physics Department, Durham, NC 27708 United States
AB: We study, by using a wavelet decomposition methodology, the solar signature on global surface temperature data using the ACRIM total solar irradiance satellite composite by Willson and Mordvinov. These data present a +0.047% per decade trend between minima during solar cycles 21-23 (1980-2002). By using the phenomenological climate sensitivity to a 22-year cycle, we estimate that the ACRIM upward trend might have contributed 10-30% of the global surface temperature warming over the period 1980-2002. Moreover, by comparing the phenomenological climate sensitivity to the 11-year solar cycle with those hypothesized by some energy balance models we conclude that the former is 1.5-3 times stronger than the latter. Finally, we study the climate sensitivity in different regions of the Earth.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1637 Regional climate change
DE: 1650 Solar variability (7537)
DE: 1739 Solar/planetary relationships
DE: 3280 Wavelet transform (3255, 4455)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005