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Though the numerical value of the temperature of the surface water is almost equal to that of 1977, it\nbecomes somewhat higher northward from 12°N.\n2) The thermocline exists in a layer at a depth of about 80 m - 200 m around 14°N,\nabout 50 m - 140 m around 09°-30\u0027N but was shallower than that in 1977. The vertical gradients of temperature in the thermocline are ca 0.10 °C/m at 14°N, ca 0.13 °C/\nm at 08°N, and less than that in 1977.\n3) The numerical value of surface salinity is ca 34.60%, and ca 0.20% lower\nthan that in 1977. The salinity maximum, which was found in a layer at a depth\nof about 100 m around 14°-30\u0027N in 1977, extended to the south from the north as\nfar as 09°N in a layer between 90 m - 125 m in 1978.\n4) The first salinity minimum is found at a depth of about 250 m at 15°N and is\nthe same as our research reported in 1977. The depth of the salinity minimum becomes gradually shallower as approaching to the equator from the north. The second salinity minimum, showing the Equatorial Pacific Water, is found at a depth of\nabout 800 m.\n5) The boundary between the North Equatorial Current and the Equatorial Countercurrent\nis recognized around 09°N and it seems to have shifted to the south compared with that in 1977.\n6) The current axies of the eastward and westward flow are around 08°-45\u0027N and\n09°-30\u0027N. The axis of the eastward flow shifts to the south about 100 miles compared with that in 1977 but the axis of the westward flow is almost the same as that\nin 1977.\nThe numerical value of the maximum velocity of the eastward and westward flow\nare ca 23 cm/sec and ca 33 cm/sec. These are somewhat higher than that in 1977.\nThe total flux of the eastward and westward flow are ca 8.0×10^\u003c6\u003e m^\u003c3\u003e/sec and ca\n19.3×10^\u003c6\u003e m^\u003c3\u003e/sec. The total flux of the eastward flow is far larger than that in 1977\nbut the total flux of the westward flow is smaller than that in 1977.\n7) The maximum value of the occurrence of zooplankton per cubic meter is 461\nindividuals at 10°N and the minimum value is 140 individuals at 13°N. The rate of\nthe occurrence of Copepoda, Radioioria, Ceratium and Appendicularia is 53%, 16%, 11%\nand 10%, respectively. 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The Oceanographical Research in the Southern Region of the Hawaiian Islands II
http://hdl.handle.net/10232/13157
http://hdl.handle.net/10232/131570b8213d2-45a6-453f-8b47-78440ef1d2d7
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2012-05-02 | |||||
タイトル | ||||||
タイトル | The Oceanographical Research in the Southern Region of the Hawaiian Islands II | |||||
別言語のタイトル | ||||||
その他のタイトル | ハワイ諸島南方海域における海洋調査 II | |||||
著者 |
YUWAKI, Yasutaka
× YUWAKI, Yasutaka× HENMI, Tomio |
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別言語の著者 | ||||||
姓名 | 湯脇, 泰隆 | |||||
別言語の著者 | ||||||
姓名 | 辺見, 富雄 | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
要約(Abstract) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Oceanographical observations and biological research in the southern region of the Hawaiian Islands were carried out on board the Keiten Maru from May to June, 1978. When the present results are compared with those obtained last year (1977), some differences are found in the oceanic characteristics and the distribution of zooplankton, which are summarized as follows. 1) The numerical values of the temperature of the surface water are ca 26.0°C at 15°N, ca 26.9°C at 12°N and ca 27.7°C at 08°N, respectively. Though the numerical value of the temperature of the surface water is almost equal to that of 1977, it becomes somewhat higher northward from 12°N. 2) The thermocline exists in a layer at a depth of about 80 m - 200 m around 14°N, about 50 m - 140 m around 09°-30'N but was shallower than that in 1977. The vertical gradients of temperature in the thermocline are ca 0.10 °C/m at 14°N, ca 0.13 °C/ m at 08°N, and less than that in 1977. 3) The numerical value of surface salinity is ca 34.60%, and ca 0.20% lower than that in 1977. The salinity maximum, which was found in a layer at a depth of about 100 m around 14°-30'N in 1977, extended to the south from the north as far as 09°N in a layer between 90 m - 125 m in 1978. 4) The first salinity minimum is found at a depth of about 250 m at 15°N and is the same as our research reported in 1977. The depth of the salinity minimum becomes gradually shallower as approaching to the equator from the north. The second salinity minimum, showing the Equatorial Pacific Water, is found at a depth of about 800 m. 5) The boundary between the North Equatorial Current and the Equatorial Countercurrent is recognized around 09°N and it seems to have shifted to the south compared with that in 1977. 6) The current axies of the eastward and westward flow are around 08°-45'N and 09°-30'N. The axis of the eastward flow shifts to the south about 100 miles compared with that in 1977 but the axis of the westward flow is almost the same as that in 1977. The numerical value of the maximum velocity of the eastward and westward flow are ca 23 cm/sec and ca 33 cm/sec. These are somewhat higher than that in 1977. The total flux of the eastward and westward flow are ca 8.0×10^<6> m^<3>/sec and ca 19.3×10^<6> m^<3>/sec. The total flux of the eastward flow is far larger than that in 1977 but the total flux of the westward flow is smaller than that in 1977. 7) The maximum value of the occurrence of zooplankton per cubic meter is 461 individuals at 10°N and the minimum value is 140 individuals at 13°N. The rate of the occurrence of Copepoda, Radioioria, Ceratium and Appendicularia is 53%, 16%, 11% and 10%, respectively. The individual number and the rate of occurrence of each one are almost equal to that in 1977. |
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収録雑誌名 |
鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University 巻 28, p. 215-231 |
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作成日 | ||||||
日付 | 1979-12-25 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
ISSN | 0453087X | |||||
NII書誌ID(雑誌) | ||||||
収録物識別子タイプ | NCID | |||||
NC ID | AN00040498 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
NDC | ||||||
主題Scheme | NDC | |||||
主題 | 663 | |||||
公開者・出版者 | ||||||
出版者 | 鹿児島大学 | |||||
公開者よみ | ||||||
公開者よみ | カゴシマ ダイガク | |||||
公開者別名 | ||||||
公開者別名 | Kagoshima University |