Spectrophotometric measurements of absorption coefficients by total particles, phytoplankton and non-algal particles during POLARSTERN cruise PS93.2 ...

• Main Authors: Wiegmann, Sonja, Liu, Yangyang, Bracher, Astrid
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: absorption; non-algal particles; particulate matter; Phytoplankton; Arctic Amplification AC3; FRontiers in Arctic marine Monitoring FRAM; Arctic; Fram Strait
• Online Access: https://dx.doi.org/10.1594/pangaea.907605; https://doi.pangaea.de/10.1594/PANGAEA.907605

Absorption coefficients by total particles (ap), phytoplankton (aph) and non-algal particles (aNAP) were measured on water samples collected from underway AC-S flow-through system outflow and CTD. Measurements were performed using a dual-beam UV/VIS spectrophotometer as described in Liu et al. (2018) and Liu et al. (2019).1. About sampling:a) underway samples were collected from unfiltered AC-S outflow (depth: 11m); CTD samples with 5-6 depths were collected on upcast.b) vacuum pressure for filtration: maximum 200 hPac) samples were shock frozen in liquid nitrogen and then stored in -80°C until measurement after cruise.d) blank filters were collected by soaking them in 0.2um filtered seawater.e) replicates were not collected.2. About measurements:a) Instrument: dual-beam UV/VIS Spectrophotometer (Cary 4000, Varian Inc., Palo Alto, CA, USA) equipped with a 150 mm integrating sphere (external DRA-900, Varian, Inc. and Labsphere Inc., made from Spectralon (TM)).b) wavelength range of scan and resolution: ... : Supplement to: Liu, Yangyang; Boss, Emmanuel; Chase, Alison P; Xi, Hongyan; Zhang, Xiaodong; Röttgers, Rüdiger; Pan, Yanqun; Bracher, Astrid (2019): Retrieval of phytoplankton pigments from underway spectrophotometry in the Fram Strait. Remote Sensing, 11(3), 318 ...