Searching planetary effects on temperature over a Southern Hemisphere location

FLAVIA BAZZANO; TERESITA HEREDIA; FRANCO MEDINA; RODOLFO CIONCO; ANA G. ELIAS

Hefei

Workshop; 10th Workshop on Long-Term Changes and Trends in the Atmosphere; 2018

University of Science and Technology of China

The temperature over Tucuman (26.8°S, 65.2°W), a location in the Northwestern region of Argentina, is analyzed in the present work in search of a plausible association with solar effects, with the purpose of contributing to the controversial issue on the connection between climate variation and anthropogenic vs. natural forcing. The long-term behavior of this temperature series involves an overall increasing trend, possibly linked to the increasing greenhouse gases concentration, and a long-term periodicity that is not statistically associated to the solar activity cycle present on the total solar irradiance (TSI) which may be directly linked to the Earth?s surface temperature. Based on quasi-periodicities detected in climate parameters not linked to evident solar irradiance cycles, we expand our study including another effect which has been considered in the dynamics of large rivers as ?the planetary hypothesis of the solar cycles?, which supposes that the barycentric dynamics of the Sun could be involved in modulations of the solar cycles. Thus, we present a preliminary statistical analysis of correlation, cross spectrum, and coherence between a temperature time series and solar orbital parameters.