Dataset: chloro_Vernet
Deployment: NBP0204

Chlorophyll a and Phaeo Pigments from Bottle Casts and Ice / Ice Cores

A short note on the "Southern Ocean Grid System": The grid is a Cartesian plane covering the sample region in which distances are easy to calculate. The grid system used for SOGLOBEC is a universal transverse mercator (UTM) projection with a certain base point and rotation. The base point was chosen in the far south and the rotation was chosen to create one axis along the peninsula, and the other offshore. The units of UTM are meters, but the points are chosen in km rounded to the nearest km. Negative numbers mean that samples were taken southwest of the y axis or southeast of the x axis. For more details see: Complete explanation of the Southern Ocean grid system.

METHODS:
Chlorophylls were dissolved in 90% acetone and measured using a Turner Designs Digital 10-AU-05 Fluorometer. The instrument was calibrated using chlorophyll a standards from Sigma Chemicals as noted below.

Calibration Notes: NBP0103
Calibrated at start of cruise using Sigma Chemicals chl_a standard.
Calibration values used were as follows:

High Fd: 0.109 High tau: 1.970
Med Fd: 0.111 Med tau: 1.950
Low Fd: 0.109 Low tau: 2.215

Calibration Notes: NBP0104
Calibrated at start of cruise using Sigma Chemicals chl_a standard.
Calibration values used were as follows:

High Fd: 0.090 High tau: 1.982
Med Fd: 0.092 Med tau: 1.981
Low Fd: 0.100 Low tau: 2.215

Calibration Notes: NBP0202
Calibrated at start of cruise using Sigma Chemicals chl_a standard.
Calibration values used were as follows:

High Fd: 0.109 High tau: 1.954
Med Fd: 0.103 Med tau: 1.949
Low Fd: 0.100 Low tau: 1.954

Calibration Notes: NBP0204
Calibrated at start of cruise using Sigma Chemicals chl_a standard.
Calibration values used were as follows:

High Fd: 0.149 High tau: 1.887
Med Fd: 0.141 Med tau: 1.968
Low Fd: 0.149 Low tau: 1.938

Data submitted by:

Maria Vernet
Scripps Institute of Oceanography
University of California, San Diego
La Jolla, California 92093-0218

Phone: 1-858-534-5322
email: mvernet@ucsd.edu

Last update: November 30, 2005; gfh