Citation:

rs11030318

Name: Optical density (median) by non-algal particles during POLARSTERN cruise PS99
Published: 2019-10-18
License: https://creativecommons.org/licenses/by/4.0/
Keywords: absorption; non-algal particles; optical density; particulate matter; Phytoplankton

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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

Project(s):

Arctic Amplification (AC3)

FRontiers in Arctic marine Monitoring (FRAM)

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: 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

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: (ARK-XXX/1.1) * Basis: * 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: (ARK-XXX/1.2) * Basis: * 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: (ARK-XXX/1.1) * Basis: * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Liu, Yangyang
2	DATE/TIME	Date/Time		Liu, Yangyang	Geocode
3	Sample ID	Sample ID		Liu, Yangyang
4	LATITUDE	Latitude		Liu, Yangyang	Geocode
5	LONGITUDE	Longitude		Liu, Yangyang	Geocode
6	DEPTH, water	Depth water	m	Liu, Yangyang	Geocode
7	Sample volume	Samp vol	l	Liu, Yangyang	filtration volume
8	Density, optical at given wavelength	OD		Liu, Yangyang	350 nm
9	Density, optical at given wavelength	OD		Liu, Yangyang	352 nm
10	Density, optical at given wavelength	OD		Liu, Yangyang	354 nm
11	Density, optical at given wavelength	OD		Liu, Yangyang	356 nm
12	Density, optical at given wavelength	OD		Liu, Yangyang	358 nm
13	Density, optical at given wavelength	OD		Liu, Yangyang	360 nm
14	Density, optical at given wavelength	OD		Liu, Yangyang	362 nm
15	Density, optical at given wavelength	OD		Liu, Yangyang	364 nm
16	Density, optical at given wavelength	OD		Liu, Yangyang	366 nm
17	Density, optical at given wavelength	OD		Liu, Yangyang	368 nm
18	Density, optical at given wavelength	OD		Liu, Yangyang	370 nm
19	Density, optical at given wavelength	OD		Liu, Yangyang	372 nm
20	Density, optical at given wavelength	OD		Liu, Yangyang	374 nm
21	Density, optical at given wavelength	OD		Liu, Yangyang	376 nm
22	Density, optical at given wavelength	OD		Liu, Yangyang	378 nm
23	Density, optical at given wavelength	OD		Liu, Yangyang	380 nm
24	Density, optical at given wavelength	OD		Liu, Yangyang	382 nm
25	Density, optical at given wavelength	OD		Liu, Yangyang	384 nm
26	Density, optical at given wavelength	OD		Liu, Yangyang	386 nm
27	Density, optical at given wavelength	OD		Liu, Yangyang	388 nm
28	Density, optical at given wavelength	OD		Liu, Yangyang	390 nm
29	Density, optical at given wavelength	OD		Liu, Yangyang	392 nm
30	Density, optical at given wavelength	OD		Liu, Yangyang	394 nm
31	Density, optical at given wavelength	OD		Liu, Yangyang	396 nm
32	Density, optical at given wavelength	OD		Liu, Yangyang	398 nm
33	Density, optical at given wavelength	OD		Liu, Yangyang	400 nm
34	Density, optical at given wavelength	OD		Liu, Yangyang	402 nm
35	Density, optical at given wavelength	OD		Liu, Yangyang	404 nm
36	Density, optical at given wavelength	OD		Liu, Yangyang	406 nm
37	Density, optical at given wavelength	OD		Liu, Yangyang	408 nm
38	Density, optical at given wavelength	OD		Liu, Yangyang	410 nm
39	Density, optical at given wavelength	OD		Liu, Yangyang	412 nm
40	Density, optical at given wavelength	OD		Liu, Yangyang	414 nm
41	Density, optical at given wavelength	OD		Liu, Yangyang	416 nm
42	Density, optical at given wavelength	OD		Liu, Yangyang	418 nm
43	Density, optical at given wavelength	OD		Liu, Yangyang	420 nm
44	Density, optical at given wavelength	OD		Liu, Yangyang	422 nm
45	Density, optical at given wavelength	OD		Liu, Yangyang	424 nm
46	Density, optical at given wavelength	OD		Liu, Yangyang	426 nm
47	Density, optical at given wavelength	OD		Liu, Yangyang	428 nm
48	Density, optical at given wavelength	OD		Liu, Yangyang	430 nm
49	Density, optical at given wavelength	OD		Liu, Yangyang	432 nm
50	Density, optical at given wavelength	OD		Liu, Yangyang	434 nm
51	Density, optical at given wavelength	OD		Liu, Yangyang	436 nm
52	Density, optical at given wavelength	OD		Liu, Yangyang	438 nm
53	Density, optical at given wavelength	OD		Liu, Yangyang	440 nm
54	Density, optical at given wavelength	OD		Liu, Yangyang	442 nm
55	Density, optical at given wavelength	OD		Liu, Yangyang	444 nm
56	Density, optical at given wavelength	OD		Liu, Yangyang	446 nm
57	Density, optical at given wavelength	OD		Liu, Yangyang	448 nm
58	Density, optical at given wavelength	OD		Liu, Yangyang	450 nm
59	Density, optical at given wavelength	OD		Liu, Yangyang	452 nm
60	Density, optical at given wavelength	OD		Liu, Yangyang	454 nm
61	Density, optical at given wavelength	OD		Liu, Yangyang	456 nm
62	Density, optical at given wavelength	OD		Liu, Yangyang	458 nm
63	Density, optical at given wavelength	OD		Liu, Yangyang	460 nm
64	Density, optical at given wavelength	OD		Liu, Yangyang	462 nm
65	Density, optical at given wavelength	OD		Liu, Yangyang	464 nm
66	Density, optical at given wavelength	OD		Liu, Yangyang	466 nm
67	Density, optical at given wavelength	OD		Liu, Yangyang	468 nm
68	Density, optical at given wavelength	OD		Liu, Yangyang	470 nm
69	Density, optical at given wavelength	OD		Liu, Yangyang	472 nm
70	Density, optical at given wavelength	OD		Liu, Yangyang	474 nm
71	Density, optical at given wavelength	OD		Liu, Yangyang	476 nm
72	Density, optical at given wavelength	OD		Liu, Yangyang	478 nm
73	Density, optical at given wavelength	OD		Liu, Yangyang	480 nm
74	Density, optical at given wavelength	OD		Liu, Yangyang	482 nm
75	Density, optical at given wavelength	OD		Liu, Yangyang	484 nm
76	Density, optical at given wavelength	OD		Liu, Yangyang	486 nm
77	Density, optical at given wavelength	OD		Liu, Yangyang	488 nm
78	Density, optical at given wavelength	OD		Liu, Yangyang	490 nm
79	Density, optical at given wavelength	OD		Liu, Yangyang	492 nm
80	Density, optical at given wavelength	OD		Liu, Yangyang	494 nm
81	Density, optical at given wavelength	OD		Liu, Yangyang	496 nm
82	Density, optical at given wavelength	OD		Liu, Yangyang	498 nm
83	Density, optical at given wavelength	OD		Liu, Yangyang	500 nm
84	Density, optical at given wavelength	OD		Liu, Yangyang	502 nm
85	Density, optical at given wavelength	OD		Liu, Yangyang	504 nm
86	Density, optical at given wavelength	OD		Liu, Yangyang	506 nm
87	Density, optical at given wavelength	OD		Liu, Yangyang	508 nm
88	Density, optical at given wavelength	OD		Liu, Yangyang	510 nm
89	Density, optical at given wavelength	OD		Liu, Yangyang	512 nm
90	Density, optical at given wavelength	OD		Liu, Yangyang	514 nm
91	Density, optical at given wavelength	OD		Liu, Yangyang	516 nm
92	Density, optical at given wavelength	OD		Liu, Yangyang	518 nm
93	Density, optical at given wavelength	OD		Liu, Yangyang	520 nm
94	Density, optical at given wavelength	OD		Liu, Yangyang	522 nm
95	Density, optical at given wavelength	OD		Liu, Yangyang	524 nm
96	Density, optical at given wavelength	OD		Liu, Yangyang	526 nm
97	Density, optical at given wavelength	OD		Liu, Yangyang	528 nm
98	Density, optical at given wavelength	OD		Liu, Yangyang	530 nm
99	Density, optical at given wavelength	OD		Liu, Yangyang	532 nm
100	Density, optical at given wavelength	OD		Liu, Yangyang	534 nm
101	Density, optical at given wavelength	OD		Liu, Yangyang	536 nm
102	Density, optical at given wavelength	OD		Liu, Yangyang	538 nm
103	Density, optical at given wavelength	OD		Liu, Yangyang	540 nm
104	Density, optical at given wavelength	OD		Liu, Yangyang	542 nm
105	Density, optical at given wavelength	OD		Liu, Yangyang	544 nm
106	Density, optical at given wavelength	OD		Liu, Yangyang	546 nm
107	Density, optical at given wavelength	OD		Liu, Yangyang	548 nm
108	Density, optical at given wavelength	OD		Liu, Yangyang	550 nm
109	Density, optical at given wavelength	OD		Liu, Yangyang	552 nm
110	Density, optical at given wavelength	OD		Liu, Yangyang	554 nm
111	Density, optical at given wavelength	OD		Liu, Yangyang	556 nm
112	Density, optical at given wavelength	OD		Liu, Yangyang	558 nm
113	Density, optical at given wavelength	OD		Liu, Yangyang	560 nm
114	Density, optical at given wavelength	OD		Liu, Yangyang	562 nm
115	Density, optical at given wavelength	OD		Liu, Yangyang	564 nm
116	Density, optical at given wavelength	OD		Liu, Yangyang	566 nm
117	Density, optical at given wavelength	OD		Liu, Yangyang	568 nm
118	Density, optical at given wavelength	OD		Liu, Yangyang	570 nm
119	Density, optical at given wavelength	OD		Liu, Yangyang	572 nm
120	Density, optical at given wavelength	OD		Liu, Yangyang	574 nm
121	Density, optical at given wavelength	OD		Liu, Yangyang	576 nm
122	Density, optical at given wavelength	OD		Liu, Yangyang	578 nm
123	Density, optical at given wavelength	OD		Liu, Yangyang	580 nm
124	Density, optical at given wavelength	OD		Liu, Yangyang	582 nm
125	Density, optical at given wavelength	OD		Liu, Yangyang	584 nm
126	Density, optical at given wavelength	OD		Liu, Yangyang	586 nm
127	Density, optical at given wavelength	OD		Liu, Yangyang	588 nm
128	Density, optical at given wavelength	OD		Liu, Yangyang	590 nm
129	Density, optical at given wavelength	OD		Liu, Yangyang	592 nm
130	Density, optical at given wavelength	OD		Liu, Yangyang	594 nm
131	Density, optical at given wavelength	OD		Liu, Yangyang	596 nm
132	Density, optical at given wavelength	OD		Liu, Yangyang	598 nm
133	Density, optical at given wavelength	OD		Liu, Yangyang	600 nm
134	Density, optical at given wavelength	OD		Liu, Yangyang	602 nm
135	Density, optical at given wavelength	OD		Liu, Yangyang	604 nm
136	Density, optical at given wavelength	OD		Liu, Yangyang	606 nm
137	Density, optical at given wavelength	OD		Liu, Yangyang	608 nm
138	Density, optical at given wavelength	OD		Liu, Yangyang	610 nm
139	Density, optical at given wavelength	OD		Liu, Yangyang	612 nm
140	Density, optical at given wavelength	OD		Liu, Yangyang	614 nm
141	Density, optical at given wavelength	OD		Liu, Yangyang	616 nm
142	Density, optical at given wavelength	OD		Liu, Yangyang	618 nm
143	Density, optical at given wavelength	OD		Liu, Yangyang	620 nm
144	Density, optical at given wavelength	OD		Liu, Yangyang	622 nm
145	Density, optical at given wavelength	OD		Liu, Yangyang	624 nm
146	Density, optical at given wavelength	OD		Liu, Yangyang	626 nm
147	Density, optical at given wavelength	OD		Liu, Yangyang	628 nm
148	Density, optical at given wavelength	OD		Liu, Yangyang	630 nm
149	Density, optical at given wavelength	OD		Liu, Yangyang	632 nm
150	Density, optical at given wavelength	OD		Liu, Yangyang	634 nm
151	Density, optical at given wavelength	OD		Liu, Yangyang	636 nm
152	Density, optical at given wavelength	OD		Liu, Yangyang	638 nm
153	Density, optical at given wavelength	OD		Liu, Yangyang	640 nm
154	Density, optical at given wavelength	OD		Liu, Yangyang	642 nm
155	Density, optical at given wavelength	OD		Liu, Yangyang	644 nm
156	Density, optical at given wavelength	OD		Liu, Yangyang	646 nm
157	Density, optical at given wavelength	OD		Liu, Yangyang	648 nm
158	Density, optical at given wavelength	OD		Liu, Yangyang	650 nm
159	Density, optical at given wavelength	OD		Liu, Yangyang	652 nm
160	Density, optical at given wavelength	OD		Liu, Yangyang	654 nm
161	Density, optical at given wavelength	OD		Liu, Yangyang	656 nm
162	Density, optical at given wavelength	OD		Liu, Yangyang	658 nm
163	Density, optical at given wavelength	OD		Liu, Yangyang	660 nm
164	Density, optical at given wavelength	OD		Liu, Yangyang	662 nm
165	Density, optical at given wavelength	OD		Liu, Yangyang	664 nm
166	Density, optical at given wavelength	OD		Liu, Yangyang	666 nm
167	Density, optical at given wavelength	OD		Liu, Yangyang	668 nm
168	Density, optical at given wavelength	OD		Liu, Yangyang	670 nm
169	Density, optical at given wavelength	OD		Liu, Yangyang	672 nm
170	Density, optical at given wavelength	OD		Liu, Yangyang	674 nm
171	Density, optical at given wavelength	OD		Liu, Yangyang	676 nm
172	Density, optical at given wavelength	OD		Liu, Yangyang	678 nm
173	Density, optical at given wavelength	OD		Liu, Yangyang	680 nm
174	Density, optical at given wavelength	OD		Liu, Yangyang	682 nm
175	Density, optical at given wavelength	OD		Liu, Yangyang	684 nm
176	Density, optical at given wavelength	OD		Liu, Yangyang	686 nm
177	Density, optical at given wavelength	OD		Liu, Yangyang	688 nm
178	Density, optical at given wavelength	OD		Liu, Yangyang	690 nm
179	Density, optical at given wavelength	OD		Liu, Yangyang	692 nm
180	Density, optical at given wavelength	OD		Liu, Yangyang	694 nm
181	Density, optical at given wavelength	OD		Liu, Yangyang	696 nm
182	Density, optical at given wavelength	OD		Liu, Yangyang	698 nm
183	Density, optical at given wavelength	OD		Liu, Yangyang	700 nm
184	Density, optical at given wavelength	OD		Liu, Yangyang	702 nm
185	Density, optical at given wavelength	OD		Liu, Yangyang	704 nm
186	Density, optical at given wavelength	OD		Liu, Yangyang	706 nm
187	Density, optical at given wavelength	OD		Liu, Yangyang	708 nm
188	Density, optical at given wavelength	OD		Liu, Yangyang	710 nm
189	Density, optical at given wavelength	OD		Liu, Yangyang	712 nm
190	Density, optical at given wavelength	OD		Liu, Yangyang	714 nm
191	Density, optical at given wavelength	OD		Liu, Yangyang	716 nm
192	Density, optical at given wavelength	OD		Liu, Yangyang	718 nm
193	Density, optical at given wavelength	OD		Liu, Yangyang	720 nm
194	Density, optical at given wavelength	OD		Liu, Yangyang	722 nm
195	Density, optical at given wavelength	OD		Liu, Yangyang	724 nm
196	Density, optical at given wavelength	OD		Liu, Yangyang	726 nm
197	Density, optical at given wavelength	OD		Liu, Yangyang	728 nm
198	Density, optical at given wavelength	OD		Liu, Yangyang	730 nm
199	Density, optical at given wavelength	OD		Liu, Yangyang	732 nm
200	Density, optical at given wavelength	OD		Liu, Yangyang	734 nm
201	Density, optical at given wavelength	OD		Liu, Yangyang	736 nm
202	Density, optical at given wavelength	OD		Liu, Yangyang	738 nm
203	Density, optical at given wavelength	OD		Liu, Yangyang	740 nm
204	Density, optical at given wavelength	OD		Liu, Yangyang	742 nm
205	Density, optical at given wavelength	OD		Liu, Yangyang	744 nm
206	Density, optical at given wavelength	OD		Liu, Yangyang	746 nm
207	Density, optical at given wavelength	OD		Liu, Yangyang	748 nm
208	Density, optical at given wavelength	OD		Liu, Yangyang	750 nm
209	Density, optical at given wavelength	OD		Liu, Yangyang	752 nm
210	Density, optical at given wavelength	OD		Liu, Yangyang	754 nm
211	Density, optical at given wavelength	OD		Liu, Yangyang	756 nm
212	Density, optical at given wavelength	OD		Liu, Yangyang	758 nm
213	Density, optical at given wavelength	OD		Liu, Yangyang	760 nm
214	Density, optical at given wavelength	OD		Liu, Yangyang	762 nm
215	Density, optical at given wavelength	OD		Liu, Yangyang	764 nm
216	Density, optical at given wavelength	OD		Liu, Yangyang	766 nm
217	Density, optical at given wavelength	OD		Liu, Yangyang	768 nm
218	Density, optical at given wavelength	OD		Liu, Yangyang	770 nm
219	Density, optical at given wavelength	OD		Liu, Yangyang	772 nm
220	Density, optical at given wavelength	OD		Liu, Yangyang	774 nm
221	Density, optical at given wavelength	OD		Liu, Yangyang	776 nm
222	Density, optical at given wavelength	OD		Liu, Yangyang	778 nm
223	Density, optical at given wavelength	OD		Liu, Yangyang	780 nm
224	Density, optical at given wavelength	OD		Liu, Yangyang	782 nm
225	Density, optical at given wavelength	OD		Liu, Yangyang	784 nm
226	Density, optical at given wavelength	OD		Liu, Yangyang	786 nm
227	Density, optical at given wavelength	OD		Liu, Yangyang	788 nm
228	Density, optical at given wavelength	OD		Liu, Yangyang	790 nm
229	Density, optical at given wavelength	OD		Liu, Yangyang	792 nm
230	Density, optical at given wavelength	OD		Liu, Yangyang	794 nm
231	Density, optical at given wavelength	OD		Liu, Yangyang	796 nm
232	Density, optical at given wavelength	OD		Liu, Yangyang	798 nm
233	Density, optical at given wavelength	OD		Liu, Yangyang	800 nm

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

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