22
The temperature T at a location in
the Northern Hemisphere depends on
longitude x, latitude y, and time t; so

22
The temperature T at a location in
the Northern Hemisphere depends on
longitude x, latitude y, and time t; so
we can write T= f(x,y,t). The time is
measured since January 1.
What is the meaning of the partial
derivatives dT/dx?
(2 Points)
The rate of change of temperature
with respect to time