CalCOFI's sampling area has evolved over the 65 years of the program. The 66 standard station pattern in the Southern California Bight (SCB) has the best coverage since 1949. The current 75 station pattern, 66 standard + 9 SCCOOS 20m stations, was implemented in 2004. Refer to the Station Positions web page for coordinates for individual CalCOFI stations. Using perimeter station positions and several coastal station reference positions, here is the estimated sampling surface area using Google Maps Area Calculator:
CalCOFI Sampling Area
55263.19 square nautical miles
Download working area KML File Here
(refer to the map for points, download the KML for the actual positions used). Please note that island area has not been excluded.
See the 113 Station Positions KML on Google Maps
The station transects and offshore stations are 40nm apart with coastal stations ~20nm apart. Current station numbering includes a decimal value to distinguish SCCOOS stations from standard CalCOFI stations; sta 93.3 26.7 (standard CalCOFI station) & 93.3 26.4 (SCCOOS), for example. Prior to 2004, standard CalCOFI station may be referenced by the integer line.sta number such as 93.27 (Station 26.7 on Line 93.3). The Line.Sta integer designation is often seen in data before 2004 when SCCOOS stations were added to CalCOFI's station pattern.
Below is a line and station table with desired position (decimal degrees) with average estimated bottom depth, and noted if it is a non-standard station. The stations are listed by order occupied as working from South to North (please note that the order occupied is dynamic and change vary from cruise to cruise). Click this KML Google maps link for station positions & descriptions on a Google map (or download KML).
CalCOFI's standard station pattern since 1984 includes 66 stations from San Diego to Pt Conception (Lines 93.3 to 76.7). Nine additional coastal ~20m SCCOOS stations were added July 2004. Thirty-eight additional stations off central and northern California are typically scheduled during winter and spring cruises, time and weather-permitting (Lines 73.3 to 60.0). A 73 station pattern (eg CalCOFI 1108NH) drops SCCOOS stations 91.7 26.4 & 85.4 35.8 when ship time is limited. These stations require the ship divert off the typical transects. (click thumbnail for larger image)
Current Winter and Spring CalCOFI surveys schedule 104 stations, which may be occupied weather-permitting, during 25 days at sea. If shiptime is limited to 16 days-at-sea, the southern 6 lines become the focus of the survey, occupying the 75 station Summer & Fall pattern. The 29 additional stations located north of Point Conception (lines 73.3 through 60.0) are surveyed but the ship may only stop when fish egg densities are high. (click thumbnail for larger image)
During winter and spring, 109 stations are scheduled when MBARI SECRET time-series stations on Line 66.7 (67) are not included. These stations, 67.65, 67.75, 67.85, 67.95, typically to 1000m, are part of the MBARI SECRET time-series (1997-2014). The 34 stations north of Point Conception, on lines 73.3 through 60.0, are surveyed but when ship-time is short, the ship may only stop when fish egg densities are high.
During winter and spring, 113 stations are normally occupied, weather-permitting. The 38 additional stations located north of Point Conception (lines 73.3 through 60.0) are surveyed but the ship may only stop when fish egg densities are high. Line 66.7, off Monterey, is part of the MBARI 'SECRET' time-series with stations every 20 NM and CTD casts to 1000m. (click thumbnail for larger image)
|Please note that order occupied is the predicted station sequence; "on-station" is within 2nm of desired position|
|CalCOFI Line||Station||Latitude||Longitude||Operations Area - Comments|
|22||90.0||80.0||31.75128 N||121.31559 W||C1177|
|23||90.0||70.0||32.08462 N||120.63872 W||C1177|
|24||90.0||60.0||32.41795 N||119.95935 W||C1177|
|25||90.0||53.0||32.65128 N||119.48228 W||C1177|
|26||90.0||45.0||32.91795 N||118.93551 W||C1177; SOAR; San Clemente Is.|
|37||86.7||45.0||33.48953 N||119.31910 W||W289S-3B|
|38||86.7||50.0||33.32286 N||119.66327 W||W289S-4A, M3, R-2535A; San Nicolas Is.|
|39||86.7||55.0||33.15619 N||120.00678 W||W289S-4A|
|40||86.7||60.0||32.98953 N||120.34964 W||W289S-5A|
|41||86.7||70.0||32.65619 N||121.03339 W||W289S-6A|
|42||86.7||80.0||32.32286 N||121.71457 W||W289S-7A|
|49||83.3||80.0||32.91176 N||122.12858 W||W289S-7B|
|50||83.3||70.0||33.24509 N||121.44283 W||W289S-6B|
|51||83.3||60.0||33.57842 N||120.75443 W||W289S-5B|
|52||83.3||55.0||33.74509 N||120.40923 W||W289S-4B|
|53||83.3||51.0||33.87842 N||120.13258 W||W289S-4B, BEFIN|
|60||80.0||51.0||34.45000 N||120.52390 W||W532S-M2|
|61||80.0||55.0||34.31667 N||120.80245 W||W532S-M2|
|62||80.0||60.0||34.15000 N||121.15000 W||W537, C1176|
|63||80.0||70.0||33.81667 N||121.84304 W||W537, C1176|
|64||80.0||80.0||33.48333 N||122.53335 W||W537, C1176|
|70||76.7||70.0||34.38824 N||122.24608 W||W532S-6C/7C|
|71||76.7||60.0||34.72158 N||121.54828 W||W532S-5C|
|72||76.7||55.0||34.88824 N||121.19831 W||W532S-5C/M1|
|73||76.7||51.0||35.02158 N||120.91782 W||W532S-M1|
CalCOFI Station 80.80: lat 33° 29.0' N lon -122° 32.0' W (33.48333 -122.53335) is one of the primary station occupied on CalCOFI quarterly hydrographic survey cruises for over 60yrs.
In March 06, 2011, a mooring (CCE-1) was deployed on sta 80.80. Real-time data can be viewed in the data section, and the sensor layout is shown in the diagram.
The surface buoy is equipped with a meteorological sensor package providing air pressure, temperature, and wind speed, furthermore a CO2 system that measures CO2 concentration of the atmosphere and the surface water, and sensors for water temperature, salinity, oxygen concentration, and an acoustic doppler current profiler for water currents in the upper 500m. Subsurface sensors at various depths in the upper
80m measure temperature, salinity, chlorophyll concentration, water turbidity, pH, oxygen concentration, nitrate concentration, and cumulative biomass via radiometers. The mooring also contains an active acoustic sensor for zooplankton abundance in the upper 300m. A passive acoustic recorder for marine mammal sounds is not installed at the fifth deployment of CCE-1, as it was in the third and fourth at 1000m depth. The water depth is approximately 4000m, and the lower 3000m of the mooring consist of a stretched line that keeps the system under tension as waves and currents pull on it. (info courtesy of CCE Project & mooring.ucsd.edu)
Area-10 is the area inside the large red-outline; FLETA HOT is the smaller purple box southwest of San Diego. CalCOFI sta 93.40 falls inside the FLETA HOT area. Seven CalCOFI stations are inside Area-10: 93.40, 93.45, 93.50. 93.55. 93.60, 90.45, 90.53.