Diurnal cycle of cumulus clouds over land (http://www.knmi.nl/samenw/eurocs/ARM/#Case)
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 21 11 30     -30      5
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 21 15 30      90    250
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 21 18 00     140    450
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 21 19 00     140    500
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 21 21 30     100    420
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 22 00 00     -10    180
 iy im id ih in     sens   flat     
                    w.m-2   w.m-2     
 97 06 22  2 00     -10      0