Fig. 1. Temporal distribution of the number of occultation profiles in January, April, July and October, 2007−2011.

Fig. 2. Flow chart of two-parameter model function method.

Fig. 3. Angle gradient profile obtained by the difference method and the model function method using the bending angle gradient profile (BA represents the bending angle): (a) Bending angle profile with uniform random error , boundary layer top height ; (b) bending angle profile with uniform random error , boundary layer top height ; (c) bending angle profile with uniform random error , boundary layer top height ; (d) bending angle profile with uniform random error , boundary layer top height .

Fig. 4. Height of the boundary layer obtained by the three methods: (a) Three methods to get the height of the boundary layer top based on profile 1, H_true = 3.15 km, std(H_M) = 0.013, std(H_L) = 0.44, std(H_M) = 0.61; (b) three methods to get the height of the boundary layer top based on profile 2, H_true = 4.55 km, std(H_M) = 0.020, std(H_L) = 0.89, std(H_M) = 1.19

Fig. 5. The 5-year average boundary layer height of the ocean obtained by the model function method, the data used is the bending angle profile of the four months of 2007−2011 in January, April, July, and October: (a) The average height of the boundary layer in January; (b) the average height of the boundary layer in April; (c) the average height of the boundary layer in July; (d) the average height of the boundary layer in October.

Fig. 6. The 5-year average boundary layer height of the ocean obtained by the model function method, the data used is the zbalmax provided by CDAAC of the four months of 2007−2011 in January, April, July, and October: (a) The average height of the boundary layer in January; (b) the average height of the boundary layer in April; (c) the average height of the boundary layer in July; (d) the average height of the boundary layer in October.