LATITUDINAL VARIATION OF DEEP SCATTERING LAYER IN THE WESTERN PACIFIC

作     者：LUELian-gang, QIAOFang-li YUANYe-li 

作者机构：KeyLaboratoryofMarineScienceandNumericalModelingTheFirstInstituteofOceanographyStateOceanicAdministrationQingdao266061China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2004年第16卷第5期

页      面：571-581页

核心收录：

学科分类：082403[工学-水声工程] 08[工学] 0824[工学-船舶与海洋工程] 

基　　金：NationalKeyBasicResearchandDevelopmentProgram (GrantNo :19990 4 3811)andYouthScienceFoundationofStateOceanicAdministration (GrantNo :G2 0 0 340 3) 

主　　题：deep scattering layer latitudinal variation north pacific intermediatewater (NPIW) acoustic doppler current profiler (ADCP) dissolved oxygen 

摘      要：The acoustic Echo Intensity (EI) was recorded with 38k shipborne AcousticDoppler Current Profiler (AD-CP) 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. Thelatitudinal variation of the main DSL, which has high level of back-scatter strength (BS) at highlatitude, is prominent during both nighttime and daytime. The influences of environmental conditionson the DSL are discussed. Since high-oxygen water in the north is a friendly environment of marineanimals which form the main DSL, more animals are expected to aggregate in the 400dbars-600dbarslayer in the north. Dissolved Oxygen (DO) is the principal factor that causes the main DSL to varywith latitude, and its spatial distributions result from formation and transport of North PacificIntermediate Water (NPIW).