Estimation of net radiation at sea

Measurement of net radiation at sea is very difficult whereas, the measurement of global solar radiation or total downward radiation is much less complicated. Hence the dependencies of net radiation on global solar radiation and total downward radiation are studied from hourly Canadian GATE data. Results show that net radiation can be estimated from measurements of incoming solar radiation or total downward radiation by empirical formulae to an accuracy comparable to that of measurement. However, these formulae must be established from measurements.