Large-scale hydrographic/CTD work is planned for the Japan/East Sea in summer, 1999, using the R/V Revelle. This is part of a multi-national study of the Japan/East Sea. Participating countries are the US, Russia, S. Korea and Japan. The hydrographic study for which clearance is herein requested includes significant Russian participation from the Far Eastern Regional Hydrometeorological Institute in Vladivostok, and the Pacific Oceanological Institute of the Russian Academy of Sciences, in Vladivostok.
The complete project includes hydrographic coverage of the entire Japan/East Sea with the exception of North Korean waters. It will be carried out from a Russian ship (FERHRI's Khromov) and the US ship R/V Revelle, for which clearance is herein requested. The R/V Revelle cruise will cover the Japanese and Korean portions of the JES plus several stations in Russian waters. The Russian (FERHRI) research vessel, the Khromov, will cover the Russian portion.
All parameters to be measured on the cruises are summarized below in Table 1. The personnel list is included as Table 2.
The scientific objectives of the hydrographic work are:
(1) determining the full vertical structure of the major components of the circulation, including the Liman Current, East Korea Warm Current and Tsushima Current, as well as a possible deep western boundary current and the other portions of the deep circulation which likely are coupled with the near-surface circulation;
(2) understanding the origin and maintenance of the subpolar front in the central JES, and the potential for topographic control;
(3) obtaining a complete synoptic view of the vertically-layered structure of the JES;
(4) using chemical tracers including nutrients, oxygen, and chlorofluorocarbons to discern the major circulation paths;
The enclosed map shows the R/V Revelle coverage for which clearance is being requested. The thin red/orange boundaries indicate our understanding of the 200 mile EEZ.
Station locations in the Russian EEZ:
39 50N 134 0E
40 0N 134 0E
40 10N 134 0E
40 20N 134 0E
40 30N 134 0E
40 50N 134 0E
All stations will consist of a CTD cast with 24 bottles or less to the ocean bottom. Station separation is basically no more than 30 nm, and is closer near boundaries.
Chart for R/V Revelle summer, 1999
survey of Japan/East Sea.
Expanded view of central region.
A table of all R/V Revelle station positions is attached.
Several stations in Russian waters in the central Japan Sea just north of Yamato Rise are indicated for the R/V Revelle cruise plan. These stations are the northern ends of two station groups which are within Japanese waters. There are two reasons for these stations:
1. An important hydrological feature is associated with Yamato Rise - the Subpolar Front. Although the front is always found, its structure and location change. It is important for the scientific goals of the program that the front be completely crossed so that properties and vertical structure of the front be completely mapped at a single time. Therefore, the Revelle crossing of the front should be complete.
2. Yamato Rise is a major bathymetric feature. It is expected that there is major, top-to-bottom circulation associated with the northern flank of the rise. This must be completely crossed to be resolved. It would be difficult, perhaps impossible, to study this circulation using stations from two different ships a month apart, because of possible time-dependence and because of potential differences in measurement calibration.
The stations which are requested for Russian waters are south of 41 15'N.
Institution list for Tables 1 and 2:
FERHRI: Far Eastern Regional Hydrogmeteorological Research
Institute, Vladivostok, Russia
POI: Pacific Oceanological Institute, Russian Academy of Sciences,
Far Eastern Branch, Vladivostok, Russia
SNU: Seoul National University, Seoul, Korea
SIO: Scripps Institution of Oceanography, La Jolla, CA, USA
WHOI: Woods Hole Oceanographic Institution, Woods Hole, MA, USA
NPGS: Naval Postgraduate School, Monterey, CA, USA
NOAA/AOML: National Oceanic and Atmospheric Administration, Miami,
FL, USA
UW: University of Washington, Seattle, WA, USA
UH: University of Hawaii, Honolulu, HI, USA
IOS: Institute of Ocean Sciences, Southampton, UK
CTD equipment (SIO): an
ODF-modified NBIS Mark IIIb CTD with O2 sensor, dual
platinum resistance thermometers, altimeter, and pinger (two
complete
systems with spares); CTD sampler-controller for back-up in event of
loss of conductor in CTD cable, PC-based acquisition system.
Salinity analysis (SIO): at least two Guildline Autosal salinometers
with at least one ampoule IAPSO Standard Seawater per station
Nutrient analysis (SIO): Technicon autoanalyzer; ODF standard methodology
Oxygen analysis (SIO): Carpenter-modified Winkler method, automated with
UV endpoint
Carbon Dioxide and other chemistry:
Pacific Oceanological Institute and Seoul National University.
Carbon 14 and delta O18: samples will be collected for analysis
ashore by Kyung-Ryul Kim's laboratory.
Surface pCO2, T, S, chlorophyll, pN2O: Kyung-Ryul Kim will supply
a Seabird and laboratory instrumentation.
Chlorofluorocarbons: University of Washington.
Nobel gases: Institute of Ocean Sciences, Southampton.
Velocity profiling: Seoul National University, Univ. of Hawaii.
Underway velocity profiling:
Bathymetry: Revelle's seabeam equipment. 5-minute center beam
values while underway on the cruise. Disposition of data following
cruise is unknown. Method for acquisition of information from Khromov
still unknown.
Shipboard meteorology: Woods Hole Oceanographic Institution.
Atmosphere soundings: San Diego State University.
Bio-optical profiling (Revelle only): Scripps Institution of Oceanography.
(Mitchell, Stramski, Flatau).
Water particle analysis (Revelle only):
Water samples will be analyzed for
spectrophotometer absorption, particle fluorometer
size distribution, multisizer pigments
using a Cary 100 Turner Designs Coulter Counter
Lynne Talley
1.4 Water sampling equipment and underway measurements
CTD/hydrographic operations: Scripps Institution of Oceanography/Oceanographic Data Facility.
During the Revelle leg the Scripps Institution of Oceanography
Oceanographic Data Facility (SIO) will support rosette
operations,
shipboard sampling and analyses for salinity, dissolved oxygen, and
nutrients (NO3, NO2, PO4, SiO3), CTD operation, and
related shipboard and shore data processing.
During the Revelle leg, a group of scientists and technicians
from FERHRI and POI will be trained to carry out
all operations using the SIO equipment and techniques
sufficiently to carry out operations on the primary Khromov leg, on
which there will be no non-Russian participants.
Water sampling equipment (SIO): two 24-place rosette frames outfitted
with 24 bottles, an intelligent pylon, and LADCP capability.
Alkalinity, pH, TCO2 equipment (Tischenko and K-R Kim to supply)
CFC equipment (Warner to supply). For the Revelle cruise, Dr.
Kyung-Ryul Kim will lend his CFC van.
Argon, neon, krypton, tritium and helium-3 equipment (Jenkins to supply)
Lowered acoustic doppler current profiler: RDI equipment
supplied by Peter Hacker at U. Hawaii. Operated on the Revelle
cruise by Kuh Kim group.
Underway acoustic doppler current profiler: Revelle's equipment.
Ramp and Ashjian will likely be processing and releasing the data.
IMET system on the Revelle.
Data acquisition and processing
will be overseen by Bob Beardsley (WHOI) and Clive Dorman (SIO/SDSU).
Free balloon, Satellite-Navigation signal,
Vaisalla manufacture, atmospheric sounding system.
A Biospherical Inst. MER, Sea Tech
transmissometer and Seabird will be used to profiles for
in-water reflectance, beam attenuation, conductivity,
temperature, fluorescence. These profiles will be conducted from
separate winch, two times a day.
ltalley@ucsd.edu
Scripps Institution of Oceanography
University of California, San Diego
Last updated November 18, 1998
