We investigated the short-term and local changes in the thermohaline front in the Jeju Strait, Korea, which is usually formed during winter and spring. To do so, we compared Real-Time Observation System by Ferryboat (RTOSF) data with wind data and routinely collected oceanographic data. During February and April 2007, a thermohaline front formed in the Jeju Strait around the 13- isotherms and 33.0-33.5 isohalines. The thermohaline was clearly weakened and began moving southward in mid-March. The variations in the surface temperature and salinity showed a continuous north-south oscillation of the thermohaline front with a period of 3-10 days. The speed of the short-term and local fluctuation of thermohaline front was about 5-30 cm/s. We confirmed these findings by examining the variation in the maximum temperature gradient and isotherm during the study period. These short-term and local changes had not been previously detected using serial oceanographic and satellite data. Analysis of local wind data revealed a northerly wind fluctuation with a period of 3-10 days, which was clearly related to the short-term and local changes in the thermohaline front. The short-term and local changes of the thermohaline front in the Jeju Strait originated from local changes in the winter monsoon in this area.
展开▼
机译:我们调查了韩国济州海峡的热盐线锋线的短期和局部变化,该变化通常在冬季和春季形成。为此,我们将渡轮实时观测系统(RTOSF)数据与风力数据和常规收集的海洋学数据进行了比较。在2007年2月和2007年4月,在济州海峡围绕13个等温线和33.0-33.5个等盐线形成了一条热盐线。 3月中旬,盐卤明显减弱,并开始向南移动。表面温度和盐度的变化表明,热盐卤锋的南北振荡持续了3-10天。盐卤盐前线的短期和局部波动速度约为5-30 cm / s。我们通过检查研究期间最大温度梯度和等温线的变化来确认这些发现。这些短期和局部变化以前没有使用连续的海洋学和卫星数据检测到。对当地风数据的分析显示,北风的波动为3-10天,这显然与热盐线锋线的短期和局部变化有关。济州海峡热盐盐锋的短期和局部变化是由于该地区冬季季风的局部变化引起的。
展开▼