Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2019
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.907605 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867167677362995200 |
|---|---|
| author | Wiegmann, Sonja Liu, Yangyang Bracher, Astrid |
| author_facet | Wiegmann, Sonja Liu, Yangyang Bracher, Astrid |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 hPa c) 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: 300-850 nm, 1 nm. c) slit band width: 2 nm. d) scan speed: 150 nm min−1 e) Sample filters were extracted with 95% methanol for the absorption measurement of NAP. f) The baseline of the spectrophotometer was set with a dry piece of a blank filter. Filters were wetted with purified water and measured regularly after every fifth sample filter served as references. 3. About data analysis: a) interpolated wavelength range and resolution: 350-750 nm, 1nm. b) pathlength amplification factor (beta correction factor): 4.5 (Röttgers and Gehnke 2012; Röttgers et al., 2014). c) Null-point scattering correction at 750 nm is applied. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_907605 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Spectrophotometric measurements of absorption coefficients by total particles, phytoplankton and non-algal particles during POLARSTERN cruise PS93.2 Wiegmann, Sonja Liu, Yangyang Bracher, Astrid absorption; AC3; Arctic Amplification; FRAM; FRontiers in Arctic marine Monitoring; non-algal particles; particulate matter; Phytoplankton 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 hPa c) 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: 300-850 nm, 1 nm. c) slit band width: 2 nm. d) scan speed: 150 nm min−1 e) Sample filters were extracted with 95% methanol for the absorption measurement of NAP. f) The baseline of the spectrophotometer was set with a dry piece of a blank filter. Filters were wetted with purified water and measured regularly after every fifth sample filter served as references. 3. About data analysis: a) interpolated wavelength range and resolution: 350-750 nm, 1nm. b) pathlength amplification factor (beta correction factor): 4.5 (Röttgers and Gehnke 2012; Röttgers et al., 2014). c) Null-point scattering correction at 750 nm is applied. |
| title | Spectrophotometric measurements of absorption coefficients by total particles, phytoplankton and non-algal particles during POLARSTERN cruise PS93.2 |
| topic | absorption; AC3; Arctic Amplification; FRAM; FRontiers in Arctic marine Monitoring; non-algal particles; particulate matter; Phytoplankton |
| url | https://doi.org/10.1594/PANGAEA.907605 |