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
OBOB collected at 5 stations along 140 deg W longitude from 17 deg S
latitude to the equator.
A Multiple Unit Large Volume in situ Filtration System (MULVFS)
was used to determine concentrations of various seawater constituents
(C, N, S, Na, Ca, Mg, K, Sr, CaCO3, P, Si(opal), Al, Ba, Mn, Fe, Cu, Pb)
during the TT007 and TT011 cruises. The MULVFS was used concurrently
with an STD (Salinity, Temperature, Depth) device and a
transmissometer. An RGB optical scanner was used to determine
particle size distributions after functionally defining the
>53 micrometer size class with 53 micrometer polyester screen filters.
Currently, only the optical particle densities, transmissometer and STD
information are available on-line.
The data is public domain and can be retrieved on-line at
[The information in this summary was taken from the JGOFS
World Wide Web pages.]