Environmental Influences on South African Fish Catch: South Coast Transition

Table 1

Pairwise cross-correlation values of Agulhas Bank environmental variables and Chlorophyll for seasonal (upper) and anomaly values in the period 1997–2007. Bold values are significant at 95% confidence. +2 refers to Chl-a lagging two months. Values near zero are omitted.

Seasonal	U stress	U current	𝑑𝑇/𝑑𝑧	Wind curl	Vert. motion	Sea temp	Salinity
U current	0.71				𝑁=12
𝑑𝑇/𝑑𝑧	−0.95	−0.56
Wind curl	0.47		−0.51
Vert. motion	−0.66	−0.90	0.49
Sea temp	0.33	0.83			−0.83
Salinity	0.37	0.43		0.31		0.46
Chl-a		0.45		−0.72	−0.58	0.59
Chl-a+2	−0.75	−0.32	0.81	−0.44	0.47
Anomalies	U stress	U current	𝑑𝑇/𝑑𝑧	Wind curl	Vert. motion	Sea temp	Salinity
U current					𝑁=120
𝑑𝑇/𝑑𝑧		0.30
Wind curl
Vert. motion		0.11	–0.25	–0.16
Sea temp	0.07			0.21	–0.19
Salinity		0.12	–0.31		0.14	0.31
Chl-a			–0.20			–0.21	–0.13
Chl-a+2			–0.09		0.25		–0.16