Standard deviation of optical density by all particles during POLARSTERN cruise PS99
| Title: | Standard deviation of optical density by all particles during POLARSTERN cruise PS99 |
|---|---|
| Authors: | Liu, Yangyang, Wiegmann, Sonja, Bracher, Astrid |
| Publisher Information: | PANGAEA |
| Publication Year: | 2019 |
| Collection: | PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen) |
| Subject Terms: | absorption, AC3, Arctic Amplification, ARK-XXX/1.1, ARK-XXX/1.2, Autonomous underwater vehicle, AUV, AUV ID 038, CT, CTD/Rosette, CTD/Rosette with Underwater Vision Profiler, CTD-RO, CTD-RO_UVP, DATE/TIME, Density, optical standard deviation, DEPTH, water, EG_I, EG_II, EG_III, EG_IV, Event label, FRAM, FRontiers in Arctic marine Monitoring, HG_I, HG_II, HG_III, HG_IV, HG_IX |
| Subject Geographic: | MEDIAN LATITUDE: 77.143306 * MEDIAN LONGITUDE: 6.096293 * SOUTH-BOUND LATITUDE: 56.769550 * WEST-BOUND LONGITUDE: -5.409330 * NORTH-BOUND LATITUDE: 80.002133 * EAST-BOUND LONGITUDE: 18.236670 * DATE/TIME START: 2016-06-14T15:12:00 * DATE/TIME END: 2016-07-12T12:30:00 * MINIMUM DEPTH, water: 5.00 m * MAXIMUM DEPTH, water: 100.00 m |
| Description: | Absorption coefficients (abs) and optical density (OD) by total particles, phytoplankton and non-algal particles (NAP) were measured with standard deviation (sd) estimated on water samples collected from underway AC-S flow-through system outflow and CTD. Measurements were performed using QFT-ICAM (Röttgers et al., 2016) 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 hPa c) samples were measured fresh (not preserved). d) blank filters were collected by soaking them in 0.2um filtered seawater. e) replicates were not collected. 2. About measurements: a) Instrument: light source: UV-VIS lamp (CF-1000- HC lamp, Illumination Technology, USA); absorption meter: Quantitative Filter Technique - Integrating Cavity Absorption Meter (QFT-ICAM) (Röttgers et al., 2016) with 80 mm- diameter integrating sphere; detector: photodiode array spectrometer (AVASPEC-ULS2048-RS-USB2, Avantes, the Netherlands). b) wavelength range of scan and resolution: 313.5-875.7 nm, 0.3 nm. c) slit band width: 2 nm. d) sample filters were bleached with 10% sodium hypochlorite (NaClO) solution for the OD measurement of NAP. e) samples were measured for four times and bleached samples were measured twice. f) dark current and blank filters were measured and subtracted. 3. About data analysis: a) interpolated wavelength range and resolution: 320-844 nm, 2nm. b) wavelength range for fluorescence correction: 670:800 nm. c) diameter of sample patch on GF/F filter: 2.133 cm. d) pathlength amplification factor (beta correction factor): 4.06 (Röttgers et al., 2016). e) no scattering correction for total particle absorption is applied; NAP absorption was adjusted with an offset in the range of 710-750 nm so that the median value of NAP absorption equals the median value of in total particle absorption in this spectral range. This adjustment is based on the ... |
| Document Type: | dataset |
| File Description: | text/tab-separated-values, 72290 data points |
| Language: | English |
| Relation: | https://doi.org/10.1594/PANGAEA.907648; 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, https://doi.org/10.3390/rs11030318; Liu, Yangyang; Röttgers, Rüdiger; Ramírez-Pérez, Marta; Dinter, Tilman; Steinmetz, Francois; Nöthig, Eva-Maria; Hellmann, Sebastian; Wiegmann, Sonja; Bracher, Astrid (2018): Underway spectrophotometry in the Fram Strait (European Arctic Ocean): a highly resolved chlorophyll a data source for complementing satellite ocean color. Optics Express, 26(14), A678-A696, https://doi.org/10.1364/OE.26.00A678; Neeley, Aimee; Mannino, Antonio; Boss, Emmanuel; D'Sa, Eurico J; Freeman, Scott; Fry, Ed; Mueller, James L; Pegau, Scott; Reynolds, Rick A; Roesler, Collin; Röttgers, Rüdiger; Stramski, Dariusz; Twardowski, Michael S (2018): Ocean Optics and Biogeochemistry Protocols for Satellite Ocean Colour Sensor Validation; Volume 1.0. Inherent Optical Property Measurements and Protocols: Absorption Coefficient. International Ocean Colour Coordinating Group (IOCCG), https://doi.org/10.25607/OBP-119; Röttgers, Rüdiger; Doxaran, David; Dupouy, Cécile (2016): Quantitative filter technique measurements of spectral light absorption by aquatic particles using a portable integrating cavity absorption meter (QFT-ICAM). Optics Express, 24(2), A1, https://doi.org/10.1364/OE.24.0000A1; https://doi.pangaea.de/10.1594/PANGAEA.907654; https://doi.org/10.1594/PANGAEA.907654 |
| DOI: | 10.1594/PANGAEA.907654 |
| Availability: | https://doi.org/10.1594/PANGAEA.907654 https://doi.org/10.1594/PANGAEA.907648 https://doi.org/10.3390/rs11030318 https://doi.org/10.1364/OE.26.00A678 https://doi.org/10.25607/OBP-119 https://doi.org/10.1364/OE.24.0000A1 |
| Rights: | CC-BY-4.0: Creative Commons Attribution 4.0 International ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess |
| Accession Number: | edsbas.6B133465 |
| Database: | BASE |
| Description not available. |