Fast Repetition Rate Fluorometry (FRRF) data collected on the RV L'Astrolabe from 26/12/2003 to 01/01/2004 (Dumont d'Urville - Hobart)

These data were collected on the RV L'Astrolabe (platform code: FHZI) from 26/12/2003 to 01/01/2004 on a trip from Dumont d'Urville to Hobart.Maximum photochemical efficiency of photosystem II (PSII), also called maximum quantum yield of PSII (Fv/Fm), has become one of the most widely utilized fluorescence parameters in phytoplankton research. It represents the potential photochemical efficiency, which is the probability that the light energy captured by the photosynthetic apparatus is being utilized as photochemistry. Fv/Fm has been shown to have an instant response to variations in physical and chemical properties and is interpreted as a diagnostic of the overall health or competence of phytoplankton. Together with the absorption cross section area of PSII and chlorophyll concentration, it can be used to measure primary production (Cheah et al. 2011, Deep Sea Research).Seawater from 3 m depth was supplied continuously from the ship’s clean seawater line. FRR fluorescence yields were measured continuously at 1 minute intervals in dark-adapted state (! 15 minutes dark-adaptation) using a flash sequence consisting of a series of 100 subsaturation flashlets (1.1 μs flash duration and 2.8 μs interflash period) and a series of 20 relaxation flashlets (1.1 μs flash duration and 51.6 μs interflash period).

本数据集采集于“L'Astrolabe”号研究船（平台编码：FHZI），采集时段为2003年12月26日至2004年1月1日，航线为从迪蒙·迪维尔站前往霍巴特。
光系统II（photosystem II, PSII）最大光化学效率，亦称为PSII最大量子产额（Fv/Fm），现已成为浮游植物研究中应用最为广泛的荧光参数之一。该参数表征潜在光化学效率，即光合装置捕获的光能用于光化学反应的概率。研究表明，Fv/Fm可对理化性质变化产生瞬时响应，可作为浮游植物整体健康状态与生理机能的诊断指标。结合PSII吸收截面与叶绿素浓度，该参数可用于海洋初级生产力的测定（Cheah等，2011，《深海研究》）。
研究通过船舶洁净海水管路连续采集3米深度的海水样品。采用暗适应（暗适应时长不低于15分钟）状态下的快速重复荧光（Fast Repetition Rate, FRR）技术，以1分钟为间隔连续测定荧光产额；测量所用闪光序列包含两组：100个亚饱和微闪光（闪光时长1.1 μs，闪光间隔2.8 μs）与20个弛豫微闪光（闪光时长1.1 μs，闪光间隔51.6 μs）。