# Earth Science problem

1. Oct 4, 2006

### suedenation

I've no idea how to start this question, please take a look.
I just pick some of the data from the table.
Thanks very much.

Daily cycle in the surface energy balance
The surface energy balance states that
Q¤ = QH + QE + QG
where QH is sensible heat, QE is latent heat and QG is ground heat flux.
I'm required to
a) give a brief interpretation1
b) compute these 24 hour totals2
– transfer of sensible heat to the atmosphere in [Jm¡2]
– transfer of latent heat to the atmosphere in [Jm¡2]
– transfer of water to the atmosphere expressed in [kgm¡2]
– equivalent loss of stored soil liquid water expressed in [mmm¡2] (note: the conversion factor is the density of liquid water, i.e. 1000 kgm¡3)

Table: Daily cycle in hourly-averaged energy balance components over grassland in Alberta. 1 July 2003. (All fluxes in W m¡2)
hour Q¤ QG QH QE
1 -77 -17 -117 23
2 -68 -17 -67 11
. . . . .
. . . . .
24 -66 -15 -101 19
etc.

Last edited: Oct 4, 2006
2. Oct 4, 2006

### Bystander

Step one is to communicate the meanings of "G, H, E" which are presumably subscripts of Q --- saves people "guessing" notations. Step two is take a stab at "part b;" once you've got "b" in hand, "a" is trivial. Dunno why they asked things in the backward order, but that's what's left you with "no idea."