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Liu, Yangyang; Wiegmann, Sonja; Bracher, Astrid (2019): Optical density (median) by all particles during POLARSTERN cruise PS99 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.907649, In 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, https://doi.org/10.3390/rs11030318

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Abstract:
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 assumption that phytoplankton pigments do not absorb in near-infrared (Neeley et al., 2018). This adjustment was not applied to NAP OD data.
f) NAP absorption data from underway samples collected during 2016-06-17T21:20, 2016-06-18T00:26, 2016-06-18T03:19, 2016-06-18T06:38, 2016-06-15T12:12, and 2016-06-15T15:09 were missing. To calculate the corresponding phytoplankton absorption, the missing NAP data were taken the same as the ones from 2016-06-17T18:13, 2016-06-18T18:09, 2016-06-18T18:09, 2016-06-18T18:09, 2016-06-15T09:15, and 2016-06-15T09:15, respectively. However, this was not applied to NAP OD data.
Keyword(s):
absorption; non-algal particles; optical density; particulate matter; Phytoplankton
Related to:
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 S; 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
Funding:
German Research Foundation (DFG), grant/award no. 268020496: TRR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms
Coverage:
Median Latitude: 76.970906 * Median Longitude: 6.159834 * 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: 2016-07-13T06:02:00
Minimum DEPTH, water: 5.00 m * Maximum DEPTH, water: 100.00 m
Event(s):
PS99.1-track * Latitude Start: 53.563960 * Longitude Start: 8.548130 * Latitude End: 78.300000 * Longitude End: 15.650000 * Date/Time Start: 2016-06-13T00:00:00 * Date/Time End: 2016-06-22T00:00:00 * Campaign: PS99.1 (ARK-XXX/1.1) * Basis: Polarstern * Method/Device: Underway cruise track measurements (CT)
PS99.2-track * Latitude Start: 78.300000 * Longitude Start: 15.650000 * Latitude End: 69.678000 * Longitude End: 18.989800 * Date/Time Start: 2016-06-23T00:00:00 * Date/Time End: 2016-07-16T00:00:00 * Campaign: PS99.2 (ARK-XXX/1.2) * Basis: Polarstern * Method/Device: Underway cruise track measurements (CT)
PS99/002-1 * Latitude: 74.858670 * Longitude: 16.098500 * Date/Time: 2016-06-19T05:22:00 * Elevation: -375.8 m * Location: Norwegian Sea * Campaign: PS99.1 (ARK-XXX/1.1) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventLiu, Yangyang
2DATE/TIMEDate/TimeLiu, YangyangGeocode
3Sample IDSample IDLiu, Yangyang
4LATITUDELatitudeLiu, YangyangGeocode
5LONGITUDELongitudeLiu, YangyangGeocode
6DEPTH, waterDepth watermLiu, YangyangGeocode
7Sample volumeSamp vollLiu, Yangyangfiltration volume
8Density, optical at given wavelengthODLiu, Yangyang350 nm
9Density, optical at given wavelengthODLiu, Yangyang352 nm
10Density, optical at given wavelengthODLiu, Yangyang354 nm
11Density, optical at given wavelengthODLiu, Yangyang356 nm
12Density, optical at given wavelengthODLiu, Yangyang358 nm
13Density, optical at given wavelengthODLiu, Yangyang360 nm
14Density, optical at given wavelengthODLiu, Yangyang362 nm
15Density, optical at given wavelengthODLiu, Yangyang364 nm
16Density, optical at given wavelengthODLiu, Yangyang366 nm
17Density, optical at given wavelengthODLiu, Yangyang368 nm
18Density, optical at given wavelengthODLiu, Yangyang370 nm
19Density, optical at given wavelengthODLiu, Yangyang372 nm
20Density, optical at given wavelengthODLiu, Yangyang374 nm
21Density, optical at given wavelengthODLiu, Yangyang376 nm
22Density, optical at given wavelengthODLiu, Yangyang378 nm
23Density, optical at given wavelengthODLiu, Yangyang380 nm
24Density, optical at given wavelengthODLiu, Yangyang382 nm
25Density, optical at given wavelengthODLiu, Yangyang384 nm
26Density, optical at given wavelengthODLiu, Yangyang386 nm
27Density, optical at given wavelengthODLiu, Yangyang388 nm
28Density, optical at given wavelengthODLiu, Yangyang390 nm
29Density, optical at given wavelengthODLiu, Yangyang392 nm
30Density, optical at given wavelengthODLiu, Yangyang394 nm
31Density, optical at given wavelengthODLiu, Yangyang396 nm
32Density, optical at given wavelengthODLiu, Yangyang398 nm
33Density, optical at given wavelengthODLiu, Yangyang400 nm
34Density, optical at given wavelengthODLiu, Yangyang402 nm
35Density, optical at given wavelengthODLiu, Yangyang404 nm
36Density, optical at given wavelengthODLiu, Yangyang406 nm
37Density, optical at given wavelengthODLiu, Yangyang408 nm
38Density, optical at given wavelengthODLiu, Yangyang410 nm
39Density, optical at given wavelengthODLiu, Yangyang412 nm
40Density, optical at given wavelengthODLiu, Yangyang414 nm
41Density, optical at given wavelengthODLiu, Yangyang416 nm
42Density, optical at given wavelengthODLiu, Yangyang418 nm
43Density, optical at given wavelengthODLiu, Yangyang420 nm
44Density, optical at given wavelengthODLiu, Yangyang422 nm
45Density, optical at given wavelengthODLiu, Yangyang424 nm
46Density, optical at given wavelengthODLiu, Yangyang426 nm
47Density, optical at given wavelengthODLiu, Yangyang428 nm
48Density, optical at given wavelengthODLiu, Yangyang430 nm
49Density, optical at given wavelengthODLiu, Yangyang432 nm
50Density, optical at given wavelengthODLiu, Yangyang434 nm
51Density, optical at given wavelengthODLiu, Yangyang436 nm
52Density, optical at given wavelengthODLiu, Yangyang438 nm
53Density, optical at given wavelengthODLiu, Yangyang440 nm
54Density, optical at given wavelengthODLiu, Yangyang442 nm
55Density, optical at given wavelengthODLiu, Yangyang444 nm
56Density, optical at given wavelengthODLiu, Yangyang446 nm
57Density, optical at given wavelengthODLiu, Yangyang448 nm
58Density, optical at given wavelengthODLiu, Yangyang450 nm
59Density, optical at given wavelengthODLiu, Yangyang452 nm
60Density, optical at given wavelengthODLiu, Yangyang454 nm
61Density, optical at given wavelengthODLiu, Yangyang456 nm
62Density, optical at given wavelengthODLiu, Yangyang458 nm
63Density, optical at given wavelengthODLiu, Yangyang460 nm
64Density, optical at given wavelengthODLiu, Yangyang462 nm
65Density, optical at given wavelengthODLiu, Yangyang464 nm
66Density, optical at given wavelengthODLiu, Yangyang466 nm
67Density, optical at given wavelengthODLiu, Yangyang468 nm
68Density, optical at given wavelengthODLiu, Yangyang470 nm
69Density, optical at given wavelengthODLiu, Yangyang472 nm
70Density, optical at given wavelengthODLiu, Yangyang474 nm
71Density, optical at given wavelengthODLiu, Yangyang476 nm
72Density, optical at given wavelengthODLiu, Yangyang478 nm
73Density, optical at given wavelengthODLiu, Yangyang480 nm
74Density, optical at given wavelengthODLiu, Yangyang482 nm
75Density, optical at given wavelengthODLiu, Yangyang484 nm
76Density, optical at given wavelengthODLiu, Yangyang486 nm
77Density, optical at given wavelengthODLiu, Yangyang488 nm
78Density, optical at given wavelengthODLiu, Yangyang490 nm
79Density, optical at given wavelengthODLiu, Yangyang492 nm
80Density, optical at given wavelengthODLiu, Yangyang494 nm
81Density, optical at given wavelengthODLiu, Yangyang496 nm
82Density, optical at given wavelengthODLiu, Yangyang498 nm
83Density, optical at given wavelengthODLiu, Yangyang500 nm
84Density, optical at given wavelengthODLiu, Yangyang502 nm
85Density, optical at given wavelengthODLiu, Yangyang504 nm
86Density, optical at given wavelengthODLiu, Yangyang506 nm
87Density, optical at given wavelengthODLiu, Yangyang508 nm
88Density, optical at given wavelengthODLiu, Yangyang510 nm
89Density, optical at given wavelengthODLiu, Yangyang512 nm
90Density, optical at given wavelengthODLiu, Yangyang514 nm
91Density, optical at given wavelengthODLiu, Yangyang516 nm
92Density, optical at given wavelengthODLiu, Yangyang518 nm
93Density, optical at given wavelengthODLiu, Yangyang520 nm
94Density, optical at given wavelengthODLiu, Yangyang522 nm
95Density, optical at given wavelengthODLiu, Yangyang524 nm
96Density, optical at given wavelengthODLiu, Yangyang526 nm
97Density, optical at given wavelengthODLiu, Yangyang528 nm
98Density, optical at given wavelengthODLiu, Yangyang530 nm
99Density, optical at given wavelengthODLiu, Yangyang532 nm
100Density, optical at given wavelengthODLiu, Yangyang534 nm
101Density, optical at given wavelengthODLiu, Yangyang536 nm
102Density, optical at given wavelengthODLiu, Yangyang538 nm
103Density, optical at given wavelengthODLiu, Yangyang540 nm
104Density, optical at given wavelengthODLiu, Yangyang542 nm
105Density, optical at given wavelengthODLiu, Yangyang544 nm
106Density, optical at given wavelengthODLiu, Yangyang546 nm
107Density, optical at given wavelengthODLiu, Yangyang548 nm
108Density, optical at given wavelengthODLiu, Yangyang550 nm
109Density, optical at given wavelengthODLiu, Yangyang552 nm
110Density, optical at given wavelengthODLiu, Yangyang554 nm
111Density, optical at given wavelengthODLiu, Yangyang556 nm
112Density, optical at given wavelengthODLiu, Yangyang558 nm
113Density, optical at given wavelengthODLiu, Yangyang560 nm
114Density, optical at given wavelengthODLiu, Yangyang562 nm
115Density, optical at given wavelengthODLiu, Yangyang564 nm
116Density, optical at given wavelengthODLiu, Yangyang566 nm
117Density, optical at given wavelengthODLiu, Yangyang568 nm
118Density, optical at given wavelengthODLiu, Yangyang570 nm
119Density, optical at given wavelengthODLiu, Yangyang572 nm
120Density, optical at given wavelengthODLiu, Yangyang574 nm
121Density, optical at given wavelengthODLiu, Yangyang576 nm
122Density, optical at given wavelengthODLiu, Yangyang578 nm
123Density, optical at given wavelengthODLiu, Yangyang580 nm
124Density, optical at given wavelengthODLiu, Yangyang582 nm
125Density, optical at given wavelengthODLiu, Yangyang584 nm
126Density, optical at given wavelengthODLiu, Yangyang586 nm
127Density, optical at given wavelengthODLiu, Yangyang588 nm
128Density, optical at given wavelengthODLiu, Yangyang590 nm
129Density, optical at given wavelengthODLiu, Yangyang592 nm
130Density, optical at given wavelengthODLiu, Yangyang594 nm
131Density, optical at given wavelengthODLiu, Yangyang596 nm
132Density, optical at given wavelengthODLiu, Yangyang598 nm
133Density, optical at given wavelengthODLiu, Yangyang600 nm
134Density, optical at given wavelengthODLiu, Yangyang602 nm
135Density, optical at given wavelengthODLiu, Yangyang604 nm
136Density, optical at given wavelengthODLiu, Yangyang606 nm
137Density, optical at given wavelengthODLiu, Yangyang608 nm
138Density, optical at given wavelengthODLiu, Yangyang610 nm
139Density, optical at given wavelengthODLiu, Yangyang612 nm
140Density, optical at given wavelengthODLiu, Yangyang614 nm
141Density, optical at given wavelengthODLiu, Yangyang616 nm
142Density, optical at given wavelengthODLiu, Yangyang618 nm
143Density, optical at given wavelengthODLiu, Yangyang620 nm
144Density, optical at given wavelengthODLiu, Yangyang622 nm
145Density, optical at given wavelengthODLiu, Yangyang624 nm
146Density, optical at given wavelengthODLiu, Yangyang626 nm
147Density, optical at given wavelengthODLiu, Yangyang628 nm
148Density, optical at given wavelengthODLiu, Yangyang630 nm
149Density, optical at given wavelengthODLiu, Yangyang632 nm
150Density, optical at given wavelengthODLiu, Yangyang634 nm
151Density, optical at given wavelengthODLiu, Yangyang636 nm
152Density, optical at given wavelengthODLiu, Yangyang638 nm
153Density, optical at given wavelengthODLiu, Yangyang640 nm
154Density, optical at given wavelengthODLiu, Yangyang642 nm
155Density, optical at given wavelengthODLiu, Yangyang644 nm
156Density, optical at given wavelengthODLiu, Yangyang646 nm
157Density, optical at given wavelengthODLiu, Yangyang648 nm
158Density, optical at given wavelengthODLiu, Yangyang650 nm
159Density, optical at given wavelengthODLiu, Yangyang652 nm
160Density, optical at given wavelengthODLiu, Yangyang654 nm
161Density, optical at given wavelengthODLiu, Yangyang656 nm
162Density, optical at given wavelengthODLiu, Yangyang658 nm
163Density, optical at given wavelengthODLiu, Yangyang660 nm
164Density, optical at given wavelengthODLiu, Yangyang662 nm
165Density, optical at given wavelengthODLiu, Yangyang664 nm
166Density, optical at given wavelengthODLiu, Yangyang666 nm
167Density, optical at given wavelengthODLiu, Yangyang668 nm
168Density, optical at given wavelengthODLiu, Yangyang670 nm
169Density, optical at given wavelengthODLiu, Yangyang672 nm
170Density, optical at given wavelengthODLiu, Yangyang674 nm
171Density, optical at given wavelengthODLiu, Yangyang676 nm
172Density, optical at given wavelengthODLiu, Yangyang678 nm
173Density, optical at given wavelengthODLiu, Yangyang680 nm
174Density, optical at given wavelengthODLiu, Yangyang682 nm
175Density, optical at given wavelengthODLiu, Yangyang684 nm
176Density, optical at given wavelengthODLiu, Yangyang686 nm
177Density, optical at given wavelengthODLiu, Yangyang688 nm
178Density, optical at given wavelengthODLiu, Yangyang690 nm
179Density, optical at given wavelengthODLiu, Yangyang692 nm
180Density, optical at given wavelengthODLiu, Yangyang694 nm
181Density, optical at given wavelengthODLiu, Yangyang696 nm
182Density, optical at given wavelengthODLiu, Yangyang698 nm
183Density, optical at given wavelengthODLiu, Yangyang700 nm
184Density, optical at given wavelengthODLiu, Yangyang702 nm
185Density, optical at given wavelengthODLiu, Yangyang704 nm
186Density, optical at given wavelengthODLiu, Yangyang706 nm
187Density, optical at given wavelengthODLiu, Yangyang708 nm
188Density, optical at given wavelengthODLiu, Yangyang710 nm
189Density, optical at given wavelengthODLiu, Yangyang712 nm
190Density, optical at given wavelengthODLiu, Yangyang714 nm
191Density, optical at given wavelengthODLiu, Yangyang716 nm
192Density, optical at given wavelengthODLiu, Yangyang718 nm
193Density, optical at given wavelengthODLiu, Yangyang720 nm
194Density, optical at given wavelengthODLiu, Yangyang722 nm
195Density, optical at given wavelengthODLiu, Yangyang724 nm
196Density, optical at given wavelengthODLiu, Yangyang726 nm
197Density, optical at given wavelengthODLiu, Yangyang728 nm
198Density, optical at given wavelengthODLiu, Yangyang730 nm
199Density, optical at given wavelengthODLiu, Yangyang732 nm
200Density, optical at given wavelengthODLiu, Yangyang734 nm
201Density, optical at given wavelengthODLiu, Yangyang736 nm
202Density, optical at given wavelengthODLiu, Yangyang738 nm
203Density, optical at given wavelengthODLiu, Yangyang740 nm
204Density, optical at given wavelengthODLiu, Yangyang742 nm
205Density, optical at given wavelengthODLiu, Yangyang744 nm
206Density, optical at given wavelengthODLiu, Yangyang746 nm
207Density, optical at given wavelengthODLiu, Yangyang748 nm
208Density, optical at given wavelengthODLiu, Yangyang750 nm
209Density, optical at given wavelengthODLiu, Yangyang752 nm
210Density, optical at given wavelengthODLiu, Yangyang754 nm
211Density, optical at given wavelengthODLiu, Yangyang756 nm
212Density, optical at given wavelengthODLiu, Yangyang758 nm
213Density, optical at given wavelengthODLiu, Yangyang760 nm
214Density, optical at given wavelengthODLiu, Yangyang762 nm
215Density, optical at given wavelengthODLiu, Yangyang764 nm
216Density, optical at given wavelengthODLiu, Yangyang766 nm
217Density, optical at given wavelengthODLiu, Yangyang768 nm
218Density, optical at given wavelengthODLiu, Yangyang770 nm
219Density, optical at given wavelengthODLiu, Yangyang772 nm
220Density, optical at given wavelengthODLiu, Yangyang774 nm
221Density, optical at given wavelengthODLiu, Yangyang776 nm
222Density, optical at given wavelengthODLiu, Yangyang778 nm
223Density, optical at given wavelengthODLiu, Yangyang780 nm
224Density, optical at given wavelengthODLiu, Yangyang782 nm
225Density, optical at given wavelengthODLiu, Yangyang784 nm
226Density, optical at given wavelengthODLiu, Yangyang786 nm
227Density, optical at given wavelengthODLiu, Yangyang788 nm
228Density, optical at given wavelengthODLiu, Yangyang790 nm
229Density, optical at given wavelengthODLiu, Yangyang792 nm
230Density, optical at given wavelengthODLiu, Yangyang794 nm
231Density, optical at given wavelengthODLiu, Yangyang796 nm
232Density, optical at given wavelengthODLiu, Yangyang798 nm
233Density, optical at given wavelengthODLiu, Yangyang800 nm
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