Welcome to SPOT

Since 1998 the University of Southern California has been conducting a time-series study in the San Pedro Channel off the coast of Southern California.  The San Pedro Ocean Time-series, or SPOT is a systematic long-term study on the physical and biogeochemical cycles in the San Pedro Basin.

The main objective of SPOT is to record over time the distribution of temperature, salinity, microbiological and chemical constituents of the sea water column at this location with a known depth of 900 meters.

SPOT consists of one small volume repeat station with sampling from a CTD/O2/Rosette equipped with twelve 12-liter Niskin bottles. Essential sample analyses will include salinity, and dissolved oxygen, pigments and nutrients.  

In addition, investigations concerning marine chemistry, microbiology and geo-biology are conducted during monthly cruises by participating departments.  The sampling needs of cruise participants will determine the number of casts per cruise.

The importance of repeat sampling over time is to measure a suite of core parameters for observing and interpreting the physical and biogeochemical variability at this location.   This knowledge contributes to our understanding of the effects of global climate change.

SPOT Events

December 8, 2014 - Sea Day
Cruise Form Deadline:  Dec. 1st.  (Note:  this has been moved from Dec. 18th)

January 15, 2015 - Sea Day
Cruise Form Deadline:  Jan. 8th.

February 12, 2015 - Sea Day
Cruise Form Deadline:  Feb. 5th.





Participants!  Please contact Troy using the Cruise Form under Particpant Info.  Form deadline is 7 days prior to the cruise.  Thank you.


  • Cruise Form must be submitted 7 days prior to cruise.
  • RV Yellowfin departs SCMI promptly at 07:00.
  • Wear close-toed shoes.
  • Bring water and lunch.
  • Take seasickness medication 45 minutes prior to boarding.
  • Wear sunscreen and a hat.

  • Troy Gunderson
  • USC Wrigley Institute for Environmental Studies
  • University of Southern California
  • University Park Campus
  • AHF 108
  • Los Angeles, CA 90089-0371