The analysis has involved the development of a four-dimensional assessment of the atmosphere during the drought over various temporal scales using a knowledge of temperature, humidity, geopotential height, wind, clouds, satellite data and model output now provides a comprehensive overview of the evolution of the drought.
42.
Where f is the Coriolis parameter, \ sigma is related to the geostrophic velocity vector, \ zeta _ g is the geostrophic relative vorticity, \ phi is the geopotential, \ nabla ^ 2 _ H is the horizontal Laplacian operator and \ nabla _ H is the horizontal del operator.
43.
The normal height H * of a point is computed from geopotential numbers by dividing the point's geopotential number, i . e . its geopotential difference with that of sea level, by the average, normal gravity computed along the plumbline of the point . ( More precisely, along the ellipsoidal normal, averaging over the height range from 0 the ellipsoid to H *; the procedure is thus recursive.
44.
The normal height H * of a point is computed from geopotential numbers by dividing the point's geopotential number, i . e . its geopotential difference with that of sea level, by the average, normal gravity computed along the plumbline of the point . ( More precisely, along the ellipsoidal normal, averaging over the height range from 0 the ellipsoid to H *; the procedure is thus recursive.
45.
The normal height H * of a point is computed from geopotential numbers by dividing the point's geopotential number, i . e . its geopotential difference with that of sea level, by the average, normal gravity computed along the plumbline of the point . ( More precisely, along the ellipsoidal normal, averaging over the height range from 0 the ellipsoid to H *; the procedure is thus recursive.
46.
This means that travelling one metre in the vertical direction, i . e ., the direction of the 9.8 m�s " 2 ambient gravity, will " approximately " change your potential by 1 GPU . Which again means that the difference in geopotential, in GPU, of a point with that of sea level can be used as a rough measure of height " above sea level " in metres.
