Figure 3: (a) A typical neutral curve , defined using expression (11) for different values of . (b) Numerical calculation of the stability on space. (c) An illustration of the dispersion relation ( versus the wave number ), where (m^{2}·day^{−1}) and the other parameters are given in Table 1. Blue line: (m·day^{−1}); red line: (m·day^{−1}); green line: (m·day^{−1}).