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Author: James Wilkinson

  • 1004MF Cruise Chronicle

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    James Wilkinson
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    Dates & Times are UTC; Tweets were posted PST (-8) Offloading CalCOFI 1004MF at Pt Huneme (Oxnard). http://twitpic.com/1oo5n7 Mon May 17 18:58:15 +0000 2010 1004MF: Completed 77.70 at midnight, on our way to 77.60; weather calm; almost finished. Sun May 16 07:37:28 +0000 2010 1004MF: next sta is 80.90 at 0440 then up to 77.90 for…

  • 1004MF DEPM Station Activity

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    James Wilkinson
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    DEPM1004 Station Activities Order_Occ Line Sta CALBOB MANTA PAIRV PRPOOS OOZEKI/TRAWL CTD SALT OXYG CHLO NUTS PHYT PRODO WEA SECCHI DRIFT DIC/KEELING REMRKS 1 94.9 29.9 X01V01   X01V01     X01V01 X01Y01           X01V01       Y=BOTTLE DID NOT TRIP 2 93.9 36.3 X01V01   X01V01     X01V01…

  • 1004MF Station Activity

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    James Wilkinson
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    CalCOFI 1004 Station Activities Order_Occ Line Sta CALBOB MANTA PAIRV PRPOOS OOZEKI/TRAWL CTD SALT OXYG CHLO NUTS PHYT PRODO WEA SECCHI DRIFT DIC/KEELING REMRKS 123* 93.4 26.4 X01V01         X01V01 X01V01 X01V01 X01V01 X01V01     X01V01       START CALCOFI 125 93.3 26.7 X01V01 X01V01 X01V01     X01V01 X01V01…

  • 1004MF Cruise Announcement

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    James Wilkinson
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      I.              Cruise Overview              I.A.      Cruise Period                         I.A.1.   23 March 2010 – 17 May 2010             I.B.      Operating Area I.B.1.   US/Mexican border to San Francisco with variable transect lengths (please refer to Appendix 1 for detailed plot).               I.C.      Summary of Objectives   Survey the distributions and abundances of pelagic fish stocks,…

  • 1004MF Cruise Track

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    James Wilkinson
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  • Multi-Frequency Acoustics

    Multi-Frequency Acoustics

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    James Wilkinson
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    A combination of multi-frequency acoustics and midwater trawl samples are used to estimate the biomass and distribution of mesopelagic and epipelagic (sardine and anchovy) fishes as well as macrozooplankon and identify areas of enhanced productivity and concentration in the southern California Current.

  • Acoustic Doppler Current Profiler

    Acoustic Doppler Current Profiler

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    James Wilkinson
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    ADCP continuous profiles of ocean currents and acoustic backscatter between 20 and 500 meters deep are measured along the shiptrack from a hull-mounted 150 kHz Acoustic Doppler Current Profiler (ADCP). The ADCP data are averaged over 3-minute intervals; typically sixty 8-meter depth bins are recorded. On NOAA vessels, ADCP data collection may be altered by…

  • Advanced Laser Fluorometer

    Advanced Laser Fluorometer

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    James Wilkinson
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    Continuous underway analysis of phytoplankton pigment groups and variable fluorescence (Fv/Fm). ALF, developed by A. Chekalyuk at Lamont-Doherty Earth Observatory, uses laser stimulated emission at 405 and 532 nm together with spectral deconvolution analysis to distinguish fluorescence from three types of phycoerythrin, chlorophyll-a, and chromophoric dissolved organic matter (CDOM). The ALF is useful for differentiating…

  • Underway pCO2

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    James Wilkinson
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    Current interest in ocean acidification has led to development and deployment of an underway pCO2-pH system. Built in the lab of Dr. Todd Martz at Scripps Oceanography for LTER, the system is installed by CALCOFI on our quarterly cruises. The system is comprised of a Sunburst Sensors SuperCO2 system for pCO2, a Durafet III pH…

  • Sea Surface & Meterological Data

    Sea Surface & Meterological Data

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    James Wilkinson
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    All CalCOFI ships actively collect sea surface, meteorological, and other types of continuous data. There are differences in systems used between boats and agencies as well as differences in data types and availability. The core parameters that are most reliably collected are navigational data such as GPS, thermosalinographic and fluorometeric data, and various types of…