Continuous Multi-spectral Fluorescence and Absorption Spectroscopy for Petroleum Hydrocarbon Detection in Near-surface Ocean Waters : ZoNiCo5 Survey, Fairway Basin Area, Lord Howe Rise

A WET Labs SAFire multi-spectral and absorption meter was used to identify dissolved poly-aromatic hydrocarbons and anomalous biological activity in near surface waters. Over 6000 km of data were collected southwest of Noumea. No obvious hydrocarbon anomalies were detected but blue-green algal blooms (Trichodesmium ?), identified also by satellite and biological analysis (Dupouy et al, 2000), were commonly encountered in the survey area. An extremely high absorption anomaly centred at 162.7 deg E and 22.7 deg S, with a strong algal fluorescence signature at 440 nm excitation, is also likely to be from the same source.

本研究使用WET Labs SAFire多光谱吸收仪（WET Labs SAFire multi-spectral and absorption meter）识别近表层海水中的溶解态多环芳烃（dissolved poly-aromatic hydrocarbons）与异常生物活动。研究团队在努美阿（Noumea）西南海域采集了总长超6000公里的观测数据。本次调查未检出明显的烃类异常，但调查区内普遍存在蓝藻水华（blue-green algal blooms），经卫星与生物学分析（Dupouy等，2000）确认其疑似为束毛藻属（Trichodesmium？）。另有一处以东经162.7°、南纬22.7°为中心的极强吸收异常，其在440nm激发波长下呈现显著藻类荧光特征，该异常的来源大概率与上述蓝藻水华一致。