Solar Effects on Weather and Climate in the Indonesian Archipelago

Solar Effects on Weather and Climate in the Indonesian Archipelago

The Houw Liong1)
Plato Martuani Siregar2)
Iratius Radiman3)

1) Department of Physics, ITB
2) Department of Geophysics and Meteorology, ITB
3) Department of Astronomy, ITB

International Seminar APRIM, Bali, 2005

Abstract
From various stations at Geographic Latitudes from 60N to 100S throughout the Indonesian Archipelago, anomalies of rainfall and irradiance were collected and plotted to those of the Monthly Sunspot Number between 1948 and 2003. It is shown that there is a tight correlation between solar activity and the various geophysical variables, such as the mean temperature of Earth, the cloud cover, the sea surface temperature and the rainfall throughout the region. It is also found that there is a weak correlation between the coefficients of correlation obtained from various plots of the number of sunspot to irradiance, the irradiance to rainfall and the number of sunspot to rainfall from each station against the geomagnetic latitude of the stations. The coefficients of correlations increases as we go to higher geomagnetic latitudes.
This is the initial study at ITB to embark and promote research on Solar Effects on Weather and Climate in the Indonesian Archipelago.

Keywords: Solar Cycle, Geomagnetic Effects.