Korea West Yellow Sea Latitude:   35.6000     Longitude:   125.6000 Associated Investigators: Young-Shil Kang   Related Web Sites: [kodc.nfrdi.re.kr/page?id]   Related Time Series: [ Korea West (Yellow Sea) ]   [ Korea South (East China Sea) ]   [ Korea East (Japan Sea) ]   [ Korea-Russia Joint Site ]   Geographical characteristics:   The Korean peninsula is surrounded by three marine ecosystems (Figure 1). The East/Japan Sea, to the east of Korea is a large, deep (>1000 m) basin. The East China Sea, to the south of Korea is larger in surface area, but shallower than the East/Japan Sea. The Yellow Sea to the west is a shallow, semi-enclosed shelf sea. The mean depth is ca. 44m, with a central trough reaching only about 90m. Sampling periods:   Sampling has been regularly conducted bimonthly (February, April, June, August, October and December) by the National Fisheries Research and Development Institute (NFRDI) since 1965. Sampling methods:   Zooplankton was collected in vertical tows from 100 m, or near the bottom at shallower stations, using a NORPAC net (0.45 m mouth diameter, 0.33 mm mesh size). Volume filtered was estimated using mouth area and depth of tow, assuming a constant filtration rate. Wet weight of zooplankton smaller than 3 cm body size was measured and standardized to unit volume to give zooplankton biomass (mg/mg3). Total copepods, amphipods, chaetognaths and euphausiids have been counted since 1978. Counts of the four taxa were also standardized to unit volume to give concentrations (individuals/m3). Others:   In addition, temperature and salinity were estimated at same stations.