Characterization of the Boreal Summer Upwelling at the Northern Coast of the Gulf of Guinea Based on the PROPAO In Situ Measurements Network and Satellite Data

Table 1

Onset date as Julian day for the four nearest grid points of PROPAO network stations. Underlined dates show upwelling initiation eastward towards Cotonou. Bold dates refer to initiation at one cape while bold and italic dates refer to initiation at both capes.

Year	Cotonou	Takoradi	Abidjan	Sassandra
1998	182	170	179	178
1999	186	188	212	213
2000	172	180	186	181
2001	174	183	194	181
2002	184	188	193	194
2003	176	169	172	181
2004	177	167	169	167
2005	176	166	174	168
2006	188	185	188	185
2007	177	178	186	196
2008	178	180	182	175
2009	195	189	190	187
2010	184	174	186	180
2011	173	186	187	190