Rosenfeld L K, McGee C D, Robertson G L, Noble M A, Jones B H
Department of Oceanography, Naval Postgraduate School, Code OC/Ro, 833 Dyer Road, Room 328, Monterey, CA 93943-5122, USA.
Mar Environ Res. 2006 Jun;61(5):471-93. doi: 10.1016/j.marenvres.2006.02.003. Epub 2006 Feb 28.
Fecal indicator bacteria concentrations measured in the surf zone off Huntington Beach, CA from July 1998-December 2001 were analyzed with respect to their spatial patterns along 23 km of beach, and temporal variability on time scales from hourly to fortnightly. The majority of samples had bacterial concentrations less than, or equal to, the minimum detection limit, but a small percentage exceeded the California recreational water standards. Areas where coliform bacteria exceeded standards were more prevalent north of the Santa Ana River, whereas enterococci exceedances covered a broad area both north and south of the river. Higher concentrations of bacteria were associated with spring tides. No temporal correspondence was found between these bacterial events and either the timing of cold water pulses near shore due to internal tides, or the presence of southerly swell in the surface wave field. All three fecal indicator bacteria exhibited a diel cycle, but enterococci rebounded to high nighttime values almost as soon as the sun went down, whereas coliform levels were highest near the nighttime low tide, which was also the lower low tide.
对1998年7月至2001年12月在加利福尼亚州亨廷顿海滩外海浪区测量的粪便指示菌浓度，分析了其沿23公里海滩的空间分布模式以及从每小时到每两周时间尺度上的时间变异性。大多数样本的细菌浓度低于或等于最低检测限，但有一小部分超过了加利福尼亚州的娱乐用水标准。大肠菌超标区域在圣安娜河以北更为普遍，而肠球菌超标区域则覆盖了该河以北和以南的大片区域。较高的细菌浓度与大潮有关。在这些细菌事件与因内潮导致的近岸冷水脉冲的时间，或表面波场中南风涌浪的存在之间，未发现时间上的对应关系。所有三种粪便指示菌都呈现出日周期，但肠球菌几乎在太阳下山后就反弹至夜间高值，而大肠菌水平在夜间低潮附近最高，夜间低潮也是较低的低潮。
