332
BAJA
CALIFORNIA
I
TIDAL FLATS
I
I
I
I
I
I
I
SONORA MESA
10 km
Fig. 22.1. The Upper Gulf of California and the Colorado River delta
S. Alvarez-Borrego
tropical summer (June-October), large-scale pressure fields drive weak
southeasterly winds (2-5m s- 1 ) primarily along the Gulf axis. Cross-Gulf
winds are particularly intense in the northwestern region during upper
level trough passages over Baja California (Badan-Dangon et al. 1991). The
northern half of the Gulf is dry and desert-like, with a mean annual precipitation of almost zero and mean evaporation of 1.1 m year- 1 • Despite heat
BAJA
CALIFORNIA
I
TIDAL FLATS
I
I
I
I
I
I
I
SONORA MESA
10 km
Fig. 22.1. The Upper Gulf of California and the Colorado River delta
S. Alvarez-Borrego
tropical summer (June-October), large-scale pressure fields drive weak
southeasterly winds (2-5m s- 1 ) primarily along the Gulf axis. Cross-Gulf
winds are particularly intense in the northwestern region during upper
level trough passages over Baja California (Badan-Dangon et al. 1991). The
northern half of the Gulf is dry and desert-like, with a mean annual precipitation of almost zero and mean evaporation of 1.1 m year- 1 • Despite heat