【摘 要】
：
本文采用美国伍兹霍尔研究所研发的海洋-大气-波浪-泥沙输运耦合模式COAWST(Coupled Dcean-Atmos-phere-Wave-Sediment Transport)对南海及邻近海域进行了9 km分辨率的数值模拟研究.结果表明,南海贯穿流的季节变化再现了冬强夏弱的特征,在南海内部冬季呈现气旋环流结构,夏季呈现反气旋环流结构,尤其在冬季其流轴结构更为清晰和稳定,海水从吕宋海峡进入南海,从民都洛海峡、卡里马塔海峡、台湾海峡和巴拉巴克海峡流出,吕宋海峡断面流量与其他4个海峡流量合计在数量级上相当,
【机 构】
：
中国海洋大学海洋与大气学院,山东 青岛 266100;齐鲁工业大学(山东省科学院;山东省计算中心(国家超级计算济南中心) ,山东 济南 250101;齐鲁工业大学(山东省科学院;山东省计算中心(国家超
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本文采用美国伍兹霍尔研究所研发的海洋-大气-波浪-泥沙输运耦合模式COAWST(Coupled Dcean-Atmos-phere-Wave-Sediment Transport)对南海及邻近海域进行了9 km分辨率的数值模拟研究.结果表明,南海贯穿流的季节变化再现了冬强夏弱的特征,在南海内部冬季呈现气旋环流结构,夏季呈现反气旋环流结构,尤其在冬季其流轴结构更为清晰和稳定,海水从吕宋海峡进入南海,从民都洛海峡、卡里马塔海峡、台湾海峡和巴拉巴克海峡流出,吕宋海峡断面流量与其他4个海峡流量合计在数量级上相当,保持南海海水总量不变.吕宋海峡、卡里马塔海峡、民都洛海峡的流量呈现明显相关性,吕宋海峡流量增大时,民都洛海峡和卡里马塔海峡的流量也相应增大,相关系数分别达到0畅78和0畅9.通过更适于分析中短期变化的简化绕岛环流理论,定量计算2019年吕宋海峡、黑潮和棉兰老流流量与北赤道流分叉点位置的关系,发现夏季北赤道流分叉点NECBL(North Equatorial Current Bifurcation Latitude)偏南,在13畅6°N附近;冬季NECBL偏北,在15畅6°N左右,同期黑潮流量减少,棉兰老流流量增加,作为南海贯穿流入流的吕宋海峡流量可达13畅4 Sv.吕宋海峡输运补偿了北赤道流到达菲律宾海岸后的北向分支的流量,与棉兰老流的流量呈正相关,相关系数达到0畅5361.
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