Author: James Wilkinson
-
0808NH Cruise Prospectus
CalCOFI 00808NH • 14 – 30 Aug 2008 • SIO RV New Horizon • San Diego to San Diego Number of participants: 18 scientists, technicians & volunteers CTD Sensors Bottle Samples Temperature Conductivity Oxygen Fluorescence Transmissometer PAR NO3 Salinity Oxygen Nutrients: Leg 1 only Chlorophyll-a, phaeopigments Primary Productivity, Leg 1 only HPLC, Leg 1 only LTER…
-
Program Overview
The California Cooperative Oceanic Fisheries Investigations (CalCOFI) are a unique partnership of the California Department of Fish & Wildlife, NOAA Fisheries Service and Scripps Institution of Oceanography. The organization was formed in 1949 to study the ecological aspects of the sardine population collapse off California. Today our focus has shifted to the study of the marine environment off the coast of…
-
Primary Productivity Sampling
Primary Productivity Primary productivity samples are taken each day shortly before local apparent noon (LAN). Primary production is estimated from 14C uptake using a simulated in-situ technique. Light penetration is estimated from the Secchi depth (assuming that the 1% light level is three times the Secchi depth). The depths with ambient light intensities corresponding to…
-
CTDMetadata Index
82-Column CTD + Bottle CSV Format (color key & data code index at bottom) Count (Excel Column) Field Description Format 1 (A) Project Cruise; usually CalCOFI or CalCOFI sampling area Text, variable 2 (B) Study YYMMSS (year month ship) Cruise designation Text, 6 char 3 (C) Ord_Occ Order Occupied Integer 4 (D) Event_Num CTD-at-Depth event…
-
Dissolved Oxygen
Dissolved Oxygen The amount of dissolved oxygen in seawater is measured using the Carpenter modification of the Winkler method. Carpenters modification (1965) was designed to increase the accuracy of the original method devised by Winkler in 1889. Using Carpenters modification, the significant loss of iodine is reduced and air oxidation of iodide is minimized. Rather…
-
Nutrient Sampling
Nutrients The phytoplankton macro nutrients nitrate, nitrite, silicate, phosphate and ammonium are analyzed in seawater using a colorimetric assay in which light absorbance is measured versus known standards. To analyze for nutrients a Seal Analytical continuous-flow AutoAnalyzer 3 (AA3) is used. After each run, the charts are reviewed for any problems, any blank is subtracted,…
-
0808NH Scientific Report
Week 1 Briefly, hydrographic data indicates distinctly a strong California Current (CC) as indicated by surface temp (-1 to -1.8) and salinity (-0.1 to – 0.35) anomalies and the location is confirmed by 100m Temp. The CC is strongest 200 to 300 miles off the coast from Pt. Conception and San Diego respectively. The flow…
-
0804JD CTD Data
<span style=”font-size: small”><strong>CalCOFI 0804JD CTD Data</strong> include 1m binavg bottle-corrected sensor data from leg 1 (25 Mar – 8 Apr) and leg 2 (23 – 30 Apr). SIO, NMFS & CDF&G scientists occupied 59 stations (Casts 1 – 59) on leg 1. On leg 2, there were twenty-one CTD stations </span><span style=”font-size: small”>(casts 60-80, order-occupied…
-
0810NH Cruise Prospectus
General Information Departs San Diego on SIO R/V New Horizon 0800 14 Oct 2008. Returns to San Diego 30 Oct 2008. Station plan: 66 standard CalCOFI and 9 SCCOOS stations are scheduled. Number of participants: 14 scientists, technicians & volunteers. CTD Sensors Temperature Conductivity Oxygen Fluorescence Transmissometer PAR NO3 Bottle Samples Salinity Oxygen Nutrients: NO3, NO2,…
-
Database Tables
Station_ID (Station ID & Desired Position) ID Autonumbered Long Integer Sta_ID LineSta Text Line CalCOFI Line Text Sta CalCOFI Station Integer DLat_Dec Desired Position Decimal Latitude Single DLat_Deg Desired Position Lat Degrees Integer DLat_Min Desired Position Lat Minutes Single DLat_Hem Desired Position Lat Hemisphere Text DLon_Dec Desired Position Decimal Longitude Single DLon_Deg Desired Position…