Current status of Antarctic environments and resources

22othe

A Study on Korea`s modern diplomatic institution : analysis on Chosun`s diplomatic framework and permanent envoy mission in the 19th century

학위논문(박사)--서울대학교 대학원 :외교학과,2000.Docto

해양생태계의 환경수용력과 관련한 최근의 연구경향

22othe

동해의 수산자원 현황 및 연구방향

22othe

Temporal changes in marine environments in the Antarctic Peninsula areaduring the 1994/95 austral summer

11othe

Preliminary observation along a hydrographic section in the Weddell Seaduring the 1996 field season (in English)

22othe

Seasonal Characteristics of Todarodes pacificus Paralarval Distribution in the Northern East China Sea

We conducted eight surveys in the northern East China Sea (ECS) in winter (February – April), summer (July), and autumn (October) 2004-2009, to investigate the seasonal distribution of T. pacificus. A total of 482 paralarvae, ranging in mantle length (ML) from 1.0 - 17.0 mm, were collected at 73 out of 181 stations. There were higher numbers of paralarvae during the winter and summer months than in the autumn. There was significant seasonal variation in the paralarval mantle lengths; mantle lengths were longer in winter (April) than in summer (July). The position of oceanic fronts in the study area played an important role in restricting paralarval distribution along the inshore edge of the Tsushima Warm Current (TWC). When the TWC expanded to western Jeju Island in winter and autumn, the paralarval distribution range extended to include western Jeju Island. However, when the TWC was located southeast of Jeju Island in the summer, paralarvae were distributed along the frontal zone off southeast Jeju Island. Sites at which paralarval mantle length was <2.0 mm ML indicated that the spawning ground were likely to be within the northern ECS in winter and summer, but north of the study area in autumn.22Nkc

Prediction of the Spawning Ground of Todarodes pacificus under IPCC Climate A1B Scenario

In the northwestern Pacific, spawning of the common squid, Todarodes pacificus, occurs at continental shelf and slope areas of 100-500 m, and the optimum temperature for the spawning and survival of paralarvae is assumed to be 18-23oC. To predict the spawning ground of Todarodes pacificus under future climate conditions, we simulated the present and future ocean circulations, using an East Asia regional ocean model (Modular Ocean Model, MOM version3), projected by two different global climate models (MPI_echam5, MIROC_hires), under an IPCC SRES A1B emission scenario. Mean climate states for 1990-1999 and 2030-2039 from 20th and 21th Century Climate Change model simulation (from the IPCC 4th Assessment Report) were used as surface conditions for simulations, and we examined changes in spawning ground between the 1990s and 2030s. The results revealed that the distribution of spawning ground in the 2030s in both climate models shifted northward in the East China Sea and East Sea, for both autumn and winter populations, compared to that of the 1990s. Also, the spawning area (with 1/6o × 1/6o grid) in the 2030s of the autumn and winter populations will decline by 11.6% (MPI_echam5) to 30.8% (MIROC_hires) and 3.0% (MPI_echam5) to 18.2% (MIROC_hires), respectively, from those of the 1990s.11scopuskc