CAJ | 학술논문

声信号的体积后向散射强度是声传播过程中一个关键的参数。海冰边缘区的声体积后向散射强度研究对深入认识北极声场环境有着十分重要的意义。本文利用中国第六次北极科学考察获取的数据资料研究了海冰边缘区声体积后向散射强度特性。结果表明：加拿大海盆海冰边缘区是声体积后向散射强度的明显过渡区。无冰海面（海冰密集度小于15％）海洋深层水的声体积后向散射强度明显大于密集海冰区域的海水（海冰密集度大于50％）。讨论了声体积后向散射强度与海冰融化之间的关系，造成融冰区声体积后向散射强度增大的原因是水下悬浮泥沙、浮游生物等悬浮物质增加。根据海冰密集海域的海水后向散射强度弱的特点，对北极下放式声学多普勒测流仪（LADCP）观测的设置提出建议。
성신호적체적후향산사강도시성전파과정중일개관건적삼수。해빙변연구적성체적후향산사강도연구대심입인식북겁성장배경유착십분중요적의의。본문이용중국제륙차북겁과학고찰획취적수거자료연구료해빙변연구성체적후향산사강도특성。결과표명：가나대해분해빙변연구시성체적후향산사강도적명현과도구。무빙해면（해빙밀집도소우15％）해양심층수적성체적후향산사강도명현대우밀집해빙구역적해수（해빙밀집도대우50％）。토론료성체적후향산사강도여해빙융화지간적관계，조성융빙구성체적후향산사강도증대적원인시수하현부니사、부유생물등현부물질증가。근거해빙밀집해역적해수후향산사강도약적특점，대북겁하방식성학다보륵측류의（LADCP）관측적설치제출건의。
Volume backscatter strength (Sv)is a key parameter for acoustic transmission.Study on volume back-scattering strength in marginal ice zone (MIZ)in the Arctic plays an important role in the knowledge of the Arctic acoustic environment.Based on the investigation during the Sixth Chinese National Arctic Research Expedition in summer 2014,the characteristics of backscatter strength in MIZ are analyzed.The results show that Sv under the open water (ice concentration less than 15%)is significantly higher than that in seawater under the packed ice (ice concentration more than 50%).Ice melt causes increasing of opaque creatures and suspended sediment,and leads to increase of Sv.According to the characteristics of low Sv under the packed ice,the proposal about the parameters of LADCP setting is given.