Volume and time-averaged Λ coefficients ⟨ℋ⟩ (left panels), ⟨ℳ⟩ (middle), and ⟨𝒱⟩ (right) from all sets of runs along with best fits to Eqs. (28)–(27). The thick lines show an adequate fit according to the criteria in the text, and the thin lines show fits with one fewer coefficient for comparison. The colours denote the maximum number of coefficients, n_max, taken into account in the fits such that n_max = 0, 1, 2, and 3 correspond to yellow, orange, red, and purple, respectively.