| LATITUDINAL VARIATION OF DEEP SCATTERING LAYER IN THE WESTERN PACIFIC |
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| 引用本文： | LUELian-gang, QIAOFang-li YUANYe-li. LATITUDINAL VARIATION OF DEEP SCATTERING LAYER IN THE WESTERN PACIFIC[J]. 水动力学研究与进展(B辑), 2004, 16(5): 571-581 |
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| 作者姓名： | LUELian-gang QIAOFang-li YUANYe-li |
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| 作者单位： | KeyLaboratoryofMarineScienceandNumericalModeling,TheFirstInstituteofOceanography,StateOceanicAdministration,Qingdao266061,China |
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| 基金项目： | NationalKeyBasicResearchandDevelopmentProgram (GrantNo :19990 4 3811)andYouthScienceFoundationofStateOceanicAdministration (GrantNo :G2 0 0 340 3) |
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| 摘 要： | The acoustic Echo Intensity (EI) was recorded with 38k shipborne Acoustic Doppler Current Profiler (ADCP) in the Western Pacific in four cruises between Sept. 2001 and Oct. 2002. The main Deep Scattering Layer (DSL) was observed at 400m-600 m depth in the four cruises. The latitudinal variation of the main DSL, which has high level of backscatter strength (BS) at high latitude, is prominent during both nighttime and daytime. The influences of environmental conditions on the DSL are discussed. Since high-oxygen water in the north is a friendly environment of marine animals which form the main DSL, more animals are expected to aggregate in the 400dbars-600dbars layer in the north. Dissolved Oxygen (DO) is the principal factor that causes the main DSL to vary with latitude, and its spatial distributions result from formation and transport of North Pacific Intermediate Water (NPIW).
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| 关 键 词： | 深散射层 纬度变化 北太平洋介质水 多普勒声流仿制 液化氧 |
LATITUDINAL VARIATION OF DEEP SCATTERING LAYER IN THE WESTERN PACIFIC |
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| Lv Lian-gang,QIAO Fang-li,YUAN Ye-li Key Laboratory of Marine Science and Numerical Modeling,The First Institute of Oceanography,State Oceanic Administration,Qingdao ,China. LATITUDINAL VARIATION OF DEEP SCATTERING LAYER IN THE WESTERN PACIFIC[J]. Journal of Hydrodynamics, 2004, 16(5): 571-581 |
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| Authors: | Lv Lian-gang QIAO Fang-li YUAN Ye-li Key Laboratory of Marine Science Numerical Modeling The First Institute of Oceanography State Oceanic Administration Qingdao China |
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| Affiliation: | Lv Lian-gang,QIAO Fang-li,YUAN Ye-li Key Laboratory of Marine Science and Numerical Modeling,The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China |
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| Abstract: | The acoustic Echo Intensity (EI) was recorded with 38k shipborne Acoustic Doppler Current Profiler (ADCP) in the Western Pacific in four cruises between Sept. 2001 and Oct. 2002. The main Deep Scattering Layer (DSL) was observed at 400m-600 m depth in the four cruises. The latitudinal variation of the main DSL, which has high level of backscatter strength (BS) at high latitude, is prominent during both nighttime and daytime. The influences of environmental conditions on the DSL are discussed. Since high-oxygen water in the north is a friendly environment of marine animals which form the main DSL, more animals are expected to aggregate in the 400dbars-600dbars layer in the north. Dissolved Oxygen (DO) is the principal factor that causes the main DSL to vary with latitude, and its spatial distributions result from formation and transport of North Pacific Intermediate Water (NPIW). |
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| Keywords: | deep scattering layer latitudinal variation North Pacific Intermediate Water (NPIW) Acoustic Doppler Current Profiler (ADCP) dissolved oxygen |
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