2 ! calculate rate constant for n2o5 + water in RADM2
4 es = 1000.*0.6112*exp(17.67*(t_phy(i,k,j)-273.15)/(t_phy(i,k,j)- 29.65))
5 qvs = es / ( p_phy(i,k,j) - es )
8 rh = moist(i,k,j,P_QV) / qvs
9 rh = MIN ( MAX ( rh, 0.), 1.)
12 rc_n2o5 = REAL(1.0 / ( 3.6E4 * EXP( -( rh / 0.28 ) ** 2.8 ) + 300.0 ), KIND=dp)