HR: 0800h
AN: GP41A-01    [Abstracts]
TI: Polar Methane Sulphonic Acid trend associated with solar activity
AU: * Mendoza, B
EM: blanca@geofisica.unam.mx
AF: Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F. C.P. 04510, México, Mexico City, 04510, Mexico
AU: Velasco, V
EM: vmv@geofisica.unam.mx
AF: Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F. C.P. 04510, México, Mexico City, 04510, Mexico
AU: Osorio, J
EM: jaime@geofisica.unam.mx
AF: Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F. C.P. 04510, México, Mexico City, 04510, Mexico
AB: Solar activity has been proposed as a main contributor to climatic change. Solar variability associated phenomena such as total solar irradiance and cosmic rays could alter the Earth's radiation budget and therefore the climate, the latter through possible modification of the cloud albedo1-4. However, biological processes have also been proposed to change the cloud albedo5. In this work we use wavelet analysis to investigate the relation between polar concentrations of Methane Sulphonic Acid (MSA), a product of seawater algae, and the Total Solar Irradiance (TSI) and the sea surface temperature (SST). Here we found that MSA presents on the 11yrs sunspot cycle a negative correlation with TSI, which would favour a positive feedback for climate, however the non linear relation with the SST also found here, indicates that the MSA is partially contributing to the SST. Our results indicate that the TSI has the possibility to alter the climate indirectly through its effect on biological processes. Quantification of the relationship between the MSA and TSI is a step forward to the knowledge of the mechanisms influencing the climate
DE: 1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1650 Solar variability (7537)
DE: 2162 Solar cycle variations (7536)
DE: 7538 Solar irradiance
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2007 Joint Assembly