Dissolved and Particulate Trace Metals Measured during the JGOFS Equatorial Pacific Process Study

The Equatorial Pacific Process Study (EQPAC) was conducted along 140 deg W
longitude during 1992.

Four cruises took place: February 3 - March 9, March 19 - April 15,
August 5 - September 18, and September 24 - October 21. A fifth benthic
cruise and sediment trap legs were added. During the first cruise
(TT007), 15 stations were occupied along 140 deg W longitude from
12 deg N latitude to 12 deg S latitude. During the second cruise
(TT008), data were collected at 8 stations along 140 deg W longitude
from 9 deg S latitude to 9 deg N latitude. During the third cruise
(TT011), data were collected at 15 stations along 140 deg W from 12 deg N
latitude to 12 deg S latitude. During the fourth cruise (TT012), data were
collected at 5 stations along 140 deg W longitude from 17 deg S
latitude to the equator.

Dissolved and particulate trace metals were filtered at 0.4
micrometers. Trace metals measured include dissolved cadmium (Cd), dissolved
cobalt (Co), dissolved copper (Cu), dissolved iron (Fe), dissolved
nickel (Ni), dissolved lead (Pb), dissolved zinc (Zn), particulate
aluminum (Al), particulate iron (Fe), and particulate manganese (Mn).
The particulate constituents were extracted with a 25% acetic acid
leach, refractory constituents by total digestion. The trace metal
data were only collected during the second (TT008) and fourth (TT012) cruises.

The data is public domain and can be retrieved on-line at
"http://usjgofs.whoi.edu/jg/dir/jgofs/"

[The information in this summary was taken from the JGOFS
World Wide Web pages.]