What is the correct equation to calculate net long wave radiation at the atmosphere to space boundary? 6. (1 mark) (ltm+l)-l b. las-(ltl) d. (ltas+l)-kex c. 7. why is there a difference between the net longwave radiation at the atmosphere to space boundary for the pdc and gc? (2 marks) (1 mark) 8. what is the correct equation to calculate surface heat flux in the atmosphere? kri+ kd+ k-(qh + q) a b. qh+qe la qn+qe+la + a c. oh + qe why is there a difference between the surface heat flux in the atmosphere for the pdc and 9. (2 marks) gc?