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Point Conception? God walks on the water below that point,

Point Conception? God walks on the water below that point, and the waters above it, He left to the devil. Phillip Vella, whose 68 years of fishing on the CA coast give him a clear understanding of biogeographic boundaries. Cluster around Point Conception. NDBC Surface Temperature Data.

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Point Conception? God walks on the water below that point,

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  1. Point Conception? God walks on the water below that point, and the waters above it, He left to the devil. Phillip Vella, whose 68 years of fishing on the CA coast give him a clear understanding of biogeographic boundaries.

  2. Cluster around Point Conception

  3. NDBC Surface Temperature Data

  4. Winds around Point Conception

  5. Surface T at all PISCO moorings shows same 10-100 day pattern, but SB Channel stations have greater high-frequency variability.

  6. Bottom (14m) temperatures at PISCO moorings

  7. Surface T at Point Sal is 2-5o cooler than Ellwood. Seasonal variation at a given station is ~ 5o. Pt Sal Purisima Arguello Jalama Alegria Ellwood

  8. 1st EOFs of NDBC Air and Water T and PISCO Water T show same seasonal variations.

  9. Alongshore Coherence in Surface Temperature

  10. Alongshore coherence in Temperature (10-day period) is greater north of Point Conception.

  11. Outside the SB Channel, wind events drive temperature changes, first near shore (PISCO), then 30km offshore (NDBC).

  12. Inside SB Channel, similar pattern, but drawn by someone drinking triple lattes; more high-frequency variability.

  13. 1st EOFs of NDBC Air and Water T and PISCO Water T show same seasonal variations.

  14. Large Scale Circulation: Seasonal Cycle Winter Summer Winant, Dever, Dorman, Harms at SIO

  15. Alongshore coherence in near-surface Principal axis currents

  16. Point Conception is a major biogeographic boundary. Do the PISCO physical data reflect this? • Yes, it’s the edge of an upwelling zone: • surface T and stratification decrease to North • upwelling pattern is more apparent to North • coherence at 10-day period increases to North • tidal and faster variability decrease to North • But: • surface T at all stations co-vary with seasons • Other differences: • cyclonic circulation in Santa Barbara Channel • internal waves more common in channel • species range boundaries

  17. Bottom (14m) temperatures at PISCO moorings

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