HR: 0800h
AN: GP41A-04    [Abstracts]
TI: The impact of the October-November 2003 intense solar storm events on the atmospheric circulation in the Pacific Southern Hemisphere Magnetic Anomaly region
AU: * Vieira, L A
EM: vieira-le@uol.com.br
AF: Universidade do Vale do Paraíba, Instituto de Pesquisa e Desenvolvimento Av. Shishima Hifumi, 2911 - Urbanova , Sao Jose dos Campos, SP 12244-000, Brazil
AU: da Silva, L A
EM: ligia@cptec.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 1758, Sao Jose dos Campos, SP 12227-010, Brazil
AU: Guarnieri, F
EM: guarnieri@univap.br
AF: Universidade do Vale do Paraíba, Instituto de Pesquisa e Desenvolvimento Av. Shishima Hifumi, 2911 - Urbanova , Sao Jose dos Campos, SP 12244-000, Brazil
AU: Echer, E
EM: eecher@dge.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 1758, Sao Jose dos Campos, SP 12227-010, Brazil
AU: Prestes, A
EM: alan@lacesm.ufsm.br
AF: Instituto Nacional de Pesquisas Espaciais (CRS - INPE), Campus da Universidade Federal de Santa Maria – UFSM Centro Tecnológico – LACESM – Cidade Universitária, Santa Maria, RS 97105-900, Brazil
AU: Dal Lago, A
EM: dallago@dge.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 1758, Sao Jose dos Campos, SP 12227-010, Brazil
AU: da Silva, M R
EM: marlos@dge.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 1758, Sao Jose dos Campos, SP 12227-010, Brazil
AU: Schuch, N
EM: njschuch@lacesm.ufsm.br
AF: Instituto Nacional de Pesquisas Espaciais (CRS - INPE), Campus da Universidade Federal de Santa Maria – UFSM Centro Tecnológico – LACESM – Cidade Universitária, Santa Maria, RS 97105-900, Brazil
AU: Wrasse, C M
EM: cmw@univap.br
AF: Universidade do Vale do Paraíba, Instituto de Pesquisa e Desenvolvimento Av. Shishima Hifumi, 2911 - Urbanova , Sao Jose dos Campos, SP 12244-000, Brazil
AB: Evidences of the solar activity modulation of the Earth's climate have been observed on different time scales. The main solar activity mechanisms to control climate proposed to explain these observations are: (1) the variability of the total solar irradiance causing a change in the total energy input to the earth's atmosphere and consequent warming/cooling; (2) the variability of the solar ultraviolet emission and its effects on the stratospheric ozone and thermal structure; (3) the cosmic rays effects on the cloud coverage; and (4) high energy particle precipitation effects on mesospheric and stratospheric ozone in the auroral and/or southern hemisphere magnetic anomaly regions during solar storm events. It is conceivable that these mechanisms contribute to varying extends on different regions. However, the precise roles of each process during extreme solar events have not yet been investigated. Here we show that the unusual atmospheric circulation conditions over the southern Pacific and Atlantic oceans, and South America on late October and early November 2003 could be related to the large solar storm events, the Halloween events. We observed the development of anti-cyclones in the South Pacific after the onset of the main proton events. We observed also changes in the position and intensity of the Intertropical Convergence Zone and in the South Pacific Convergence zone. This result reveals that effects on the atmospheric conditions, including cloud coverage and radiative flux in the atmosphere, in the southern hemisphere magnetic anomaly region could be observed during extreme solar conditions. Previous studies suggested that the influence of solar activity on climate could be observed on decadal to millennia time scales. Our results demonstrate that the variability of the solar activity could have impact on southern hemisphere weather and climatic conditions. We anticipate our analysis to be a starting point for more sophisticated weather and climatic models. For example, the predictability of El Niño events could be tested, including its worldwide effects, based on space weather processes. Furthermore, the increase of the southern hemisphere temperature could be investigated based on changes of the Earth's magnetic field configuration.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1650 Solar variability (7537)
DE: 3310 Clouds and cloud feedbacks
DE: 3337 Global climate models (1626, 4928)
DE: 7974 Solar effects
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2007 Joint Assembly