Fig. 2

Potential temperature with depth during the FLX91 simulations (a–k) and the observations l. The simulations were done with (a–d) 100 levels, (e–h) 50 levels, and (i–k) 25 levels. The results from Nakanishi–Niino are given in (a, e, i), those from Mellor–Yamada 2.5 in (b, f, j), GLS in (c, g, k) and Large–McWilliams–Doney in (d, h). No results are shown for Large–McWilliams–Doney for 25 levels as they were essentially the same as those for 50 levels