Citation:

PANGAEA.763970

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Abstract:

As part of the GEOTRACES Polarstern expedition ANT XXIV/3 (ZERO and DRAKE), Polonium-210 and Lead-210 have been measured in the water column and on suspended particulate matter in February to April 2008. Our goal was to resolve the affinities of 210Po and 210Pb to transparent exopolymer particles (TEP) and particulate organic carbon (POC).

Polonium-210 and Lead-210 in the ocean can be used to identify the sources and sinks of suspended matter. In seawater, Polonium-210 (210Po) and Lead-210 (210Pb) are produced by stepwise radioactive decay of Uranium-238. 210Po (138 days half life) and 210Pb (22.3 years half life) have high affinities for suspended particles. Those radionuclides are present in dissolved form and adsorbed onto particles. Following adsorption onto particle surfaces, 210Po especially is transported into the interior of cells where it bonds to proteins. In this way, 210Po also accumulates in the food chain. 210Po is therefore considered to be a good tracer for POC, and traces particle export over a timescale of months. 210Pb (22.3 years half life) adsorbs preferably onto structural components of cells, biogenic silica and lithogenic particles, and is therefore a better tracer more rapidly sinking matter.

Water samples were taken with Niskin bottles. Dissolved Polonium-210 and Lead-210 activities refer to the fraction < 1µm. Particulate Polonium-210 and Lead-210 refer to the activity on particles >1µm retained on nucleopore filters. Zooplankton retained on the filters was systematically removed as this study focused on phytoplankton and exudates. The data have been submitted to Pangaea following a Polonium-Lead intercalibration exercise organized by GEOTRACES, where the AWI lab results range within the data standard deviation from 10 participating labs.

Related to:

Church, Thomas; Rigaud, Sylvain; Baskaran, Mark; Kumar, Anupam; Friedrich, Jana; Masqué, Pere; Puigcorbé, Viena; Kim, Guebuem; Radakovitch, Olivier; Hong, Gi Hoon (2012): Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples. Limnology and Oceanography-Methods, 10, 776-789, https://doi.org/10.4319/lom.2012.10.776

Fahrbach, Eberhard; de Baar, Hein J W (2010): The Expedition of the Research Vessel Polarstern to the Antarctic in 2008 (ANT-XXIV/3). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 606, 232 pp, https://doi.org/10.2312/BzPM_0606_2010

Project(s):

Global marine biogeochemical cycles of trace elements and their isotopes (GEOTRACES)

Coverage:

Median Latitude: -58.360944 * Median Longitude: -8.713867 * South-bound Latitude: -69.390600 * West-bound Longitude: -64.427800 * North-bound Latitude: -42.338900 * East-bound Longitude: 8.993400

Date/Time Start: 2008-02-13T17:17:00 * Date/Time End: 2008-04-11T15:57:00

Minimum DEPTH, water: 25 m * Maximum DEPTH, water: 1000 m

Event(s):

PS71/101-2 * Latitude: -42.338900 * Longitude: 8.993400 * Date/Time: 2008-02-13T17:17:00 * Elevation: -4546.0 m * Location: South Atlantic Ocean * Campaign: (PS71) * Basis: * Method/Device: (CTD-UC)

PS71/104-2 * Latitude: -47.671800 * Longitude: 4.289300 * Date/Time: 2008-02-17T00:03:00 * Elevation: -4546.0 m * Location: South Atlantic Ocean * Campaign: (PS71) * Basis: * Method/Device: (CTD-UC)

PS71/113-6 * Latitude: -53.022900 * Longitude: 0.055900 * Date/Time: 2008-02-20T20:22:00 * Elevation: -2430.0 m * Location: South Atlantic Ocean * Campaign: (PS71) * Basis: * Method/Device: (CTD-UC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event
2	Date/Time of event	Date/Time
3	Latitude of event	Latitude
4	Longitude of event	Longitude
5	Elevation of event	Elevation	m
6	DEPTH, water	Depth water	m		Geocode
7	Polonium-210, particulate	210Po part	dpm/100 l	Friedrich, Jana
8	Polonium-210, particulate, standard deviation	210Po part std dev	±	Friedrich, Jana
9	Polonium-210, dissolved	210Po diss	dpm/100 l	Friedrich, Jana
10	Polonium-210, dissolved, standard deviation	210Po diss std dev	±	Friedrich, Jana
11	Polonium-210	210Po	dpm/100 l	Friedrich, Jana
12	Polonium-210, standard deviation	210Po std dev	±	Friedrich, Jana
13	Lead-210, particulate	210Pb part	dpm/100 l	Friedrich, Jana
14	Lead-210, particulate, standard deviation	210Pb part std dev	±	Friedrich, Jana
15	Lead-210, dissolved	210Pb diss	dpm/100 l	Friedrich, Jana
16	Lead-210, dissolved, standard deviation	210Pb diss std dev	±	Friedrich, Jana
17	Lead-210	210Pb	dpm/100 l	Friedrich, Jana
18	Lead-210, standard deviation	210Pb std dev	±	Friedrich, Jana
19	Polonium-210/Lead-210 activity ratio, dissolved	(210Po/210Pb) diss		Friedrich, Jana
20	Polonium-210/Lead-210 activity ratio, dissolved, standard deviation	(210Po/210Pb) diss std dev	±	Friedrich, Jana
21	Polonium-210/Lead-210 activity ratio	(210Po/210Pb)		Friedrich, Jana
22	Polonium-210/Lead-210, standard deviation	210Po/210Pb std dev	±	Friedrich, Jana
23	Polonium-210/Lead-210 activity ratio, particulate	(210Po/210Pb) part		Friedrich, Jana
24	Polonium-210/Lead-210 activity ratio, particulate, standard deviation	(210Po/210Pb) part std dev	±	Friedrich, Jana

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

782 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Date/Time	3 Latitude	4 Longitude	5 Elevation [m]	6 Depth water [m]	7 210Po part [dpm/100 l]	8 210Po part std dev [±]	9 210Po diss [dpm/100 l]	10 210Po diss std dev [±]	11 210Po [dpm/100 l]	12 210Po std dev [±]	13 210Pb part [dpm/100 l]	14 210Pb part std dev [±]	15 210Pb diss [dpm/100 l]	16 210Pb diss std dev [±]	17 210Pb [dpm/100 l]	18 210Pb std dev [±]	19 (210Po/210Pb) diss	20 (210Po/210Pb) diss std dev [±]	21 (210Po/210Pb)	22 210Po/210Pb std dev [±]	23 (210Po/210Pb) part	24 (210Po/210Pb) part std dev [±]
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	25	0.557	0.025	2.781	0.075	3.338	0.079	0.705	0.049	6.954	0.437	7.658	0.440	0.400	0.027	0.436	0.027	0.791	0.065
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	100	0.179	0.011	3.139	0.111	3.318	0.111	0.662	0.047	7.735	0.451	8.397	0.453	0.406	0.028	0.395	0.025	0.270	0.025
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	200	0.103	0.008	4.804	0.174	4.907	0.174	0.253	0.025	10.390	0.620	10.642	0.620	0.462	0.032	0.461	0.031	0.407	0.052
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	500	0.248	0.013	3.624	0.122	3.872	0.122	0.536	0.038	4.866	0.270	5.401	0.272	0.745	0.048	0.717	0.043	0.463	0.041
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	750	0.287	0.014	3.799	0.134	4.086	0.135	0.203	0.024	5.608	0.323	5.811	0.323	0.677	0.046	0.703	0.046	1.415	0.180
PS71/101-2	2008-02-13T17:17	-42.3389	8.9934	-4546	1000	0.751	0.033					0.838	0.055	9.506	0.536	10.345	0.539					0.896	0.071
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	25	0.632	0.030	4.215	0.141	4.847	0.144	0.657	0.048	5.295	0.304	5.953	0.308	0.796	0.053	0.814	0.049	0.961	0.084
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	100	0.105	0.009	3.653	0.128	3.758	0.129	0.366	0.030	5.970	0.339	6.335	0.340	0.612	0.041	0.593	0.038	0.288	0.034
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	200	0.178	0.010	3.545	0.124	3.723	0.125	0.662	0.044	6.005	0.333	6.667	0.336	0.590	0.039	0.558	0.034	0.269	0.023
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	500	0.240	0.012					0.332	0.028									0.725	0.071
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	750	0.253	0.012	6.111	0.221	6.364	0.222	0.265	0.025									0.952	0.101
PS71/104-2	2008-02-17T00:03	-47.6718	4.2893	-4546	1000	0.377	0.017	5.495	0.205	5.871	0.206	0.319	0.027	7.128	0.403	7.446	0.404	0.771	0.052	0.789	0.051	1.182	0.114
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	25	2.269	0.091	4.009	0.153	6.278	0.177	0.789	0.052	5.694	0.326	6.483	0.330	0.704	0.048	0.968	0.056	2.876	0.222
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	100	0.679	0.029	4.359	0.194	5.038	0.196	0.826	0.054	6.254	0.347	7.080	0.351	0.697	0.050	0.712	0.045	0.822	0.064
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	200	0.302	0.015	5.490	0.184	5.792	0.184	0.321	0.028	8.590	0.485	8.910	0.486	0.639	0.042	0.650	0.041	0.943	0.094
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	500	0.430	0.020	7.665	0.252	8.095	0.253	0.319	0.028	9.189	0.486	9.508	0.487	0.834	0.052	0.851	0.051	1.347	0.133
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	750	0.516	0.023	7.279	0.295	7.795	0.296	0.358	0.029	9.482	0.520	9.840	0.521	0.768	0.052	0.792	0.052	1.439	0.132
PS71/113-6	2008-02-20T20:22	-53.0229	0.0559	-2430	1000	0.671	0.027					0.564	0.040									1.190	0.097
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	25	0.635	0.029	4.237	0.133	4.856	0.135	0.793	0.054	6.158	0.203	6.952	0.210	0.685	0.038	0.699	0.035	0.801	0.060
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	100	0.240	0.012	5.679	0.229	5.813	0.225	0.409	0.031	7.961	0.332	8.371	0.333	0.700	0.043	0.694	0.040	0.586	0.049
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	200	0.442	0.017	5.819	0.138	6.115	0.135	0.163	0.022	11.094	0.285	11.257	0.286	0.511	0.027	0.543	0.028	0.511	0.027
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	500	0.858	0.032	11.576	0.456	12.410	0.456	0.242	0.024	15.035	0.611	15.277	0.611	0.768	0.046	0.812	0.047	0.768	0.046
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	750	0.675	0.030	10.517	0.444	11.092	0.441	0.192	0.022	9.554	0.415	9.746	0.416	1.090	0.067	1.138	0.068	1.090	0.067
PS71/131-6	2008-02-24T22:55	-58.9996	0.0005	-4595	1000	1.017	0.039	8.437	0.326	9.375	0.325	0.435	0.032	8.318	0.332	8.754	0.334	1.005	0.061	1.071	0.060	1.005	0.061
PS71/150-2	2008-02-29T09:31	-64.9998	-0.0017	-3728	40	1.319	0.050	2.479	0.075	3.798	0.090	2.439	0.168	7.186	0.440	9.625	0.471	0.345	0.024	0.395	0.021	0.541	0.042
PS71/157-1	2008-03-07T15:06	-66.5167	-0.0558	-4585	25			3.558	0.098			2.486	0.163	4.840	0.267	7.326	0.313	0.735	0.045
PS71/157-1	2008-03-07T15:06	-66.5167	-0.0558	-4585	45	3.067	0.128	5.280	0.159	8.346	0.204	1.830	0.122	13.013	0.708	14.843	0.719	0.406	0.025	0.562	0.031	1.676	0.132
PS71/157-1	2008-03-07T15:06	-66.5167	-0.0558	-4585	100	0.772	0.031	4.847	0.160	5.619	0.163	0.423	0.032	9.330	0.506	9.754	0.507	0.520	0.033	0.576	0.034	1.823	0.154
PS71/157-1	2008-03-07T15:06	-66.5167	-0.0558	-4585	200	0.497	0.021	7.314	0.339	7.810	0.340	0.425	0.032	9.809	0.544	10.234	0.545	0.746	0.054	0.763	0.052	1.170	0.100
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	25	1.287	0.041	3.035	0.114	4.322	0.122	0.974	0.062	4.975	0.285	5.948	0.292	0.610	0.042	0.727	0.041	1.322	0.094
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	100	1.777	0.073	4.478	0.162	6.255	0.178	2.483	0.143	7.319	0.410	9.803	0.434	0.612	0.041	0.638	0.034	0.716	0.051
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	200	0.413	0.026	5.537	0.203	5.950	0.205	0.259	0.024	8.873	0.518	9.131	0.519	0.624	0.043	0.652	0.043	1.594	0.181
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	500	0.519	0.019	7.208	0.229	7.728	0.230	0.396	0.032	8.274	0.452	8.670	0.453	0.871	0.055	0.891	0.054	1.311	0.118
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	750	0.508	0.022	5.009	0.155	5.517	0.156	0.370	0.030	7.761	0.426	8.131	0.427	0.645	0.041	0.679	0.040	1.374	0.127
PS71/178-8	2008-03-12T09:00	-69.3906	-0.0983	-2004	1000	0.626	0.027	5.680	0.150	6.306	0.153	0.617	0.045	7.445	0.426	8.062	0.428	0.763	0.048	0.782	0.046	1.014	0.085
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	50	0.832	0.031	4.137	0.127	4.968	0.131	0.726	0.065	8.692	0.473	9.418	0.476	0.476	0.030	0.528	0.030	1.146	0.091
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	100	0.401	0.018	3.217	0.102	3.618	0.103	0.437	0.059	8.937	0.480	9.375	0.481	0.360	0.022	0.386	0.023	0.917	0.079
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	200	0.535	0.019	5.235	0.213	5.771	0.214	0.221	0.061	11.741	0.685	11.962	0.686	0.446	0.032	0.482	0.033	2.424	0.270
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	500	0.428	0.017	9.210	0.336	9.638	0.337	0.206	0.060	8.140	0.435	8.347	0.436	1.131	0.073	1.155	0.073	2.075	0.243
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	750	0.457	0.018	10.772	0.449	11.229	0.450	0.133	0.060	9.044	0.509	9.177	0.510	1.191	0.068	1.224	0.084	3.432	0.548
PS71/193-6	2008-03-18T21:50	-66.6072	-27.1803	-4864	1000	0.611	0.023	13.441	0.573	14.052	0.574	0.293	0.060	9.762	0.523	10.055	0.523	1.377	0.094	1.397	0.092	2.081	0.200
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	50	0.646	0.026	3.484	0.099	4.129	0.102	0.191	0.023	5.873	0.343	6.064	0.343	0.593	0.038	0.681	0.042	3.389	0.431
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	100	0.385	0.018	4.281	0.138	4.666	0.139	0.198	0.023	10.089	0.582	10.287	0.583	0.424	0.028	0.454	0.029	1.946	0.243
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	200	0.137	0.009					0.188	0.022	6.156	0.359	6.345	0.360					0.727	0.099
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	500	0.193	0.010	3.835	0.123	4.028	0.123			9.971	0.553			0.385	0.025
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	750	0.416	0.022	8.363	0.252	8.780	0.253	0.286	0.027	15.704	0.906	15.990	0.907	0.533	0.035	0.549	0.035	1.457	0.159
PS71/250-6	2008-04-11T15:57	-55.7010	-64.4278	-3798	1000	0.400	0.018	7.316	0.281	7.716	0.281	0.224	0.024	10.790	0.592	11.014	0.592	0.678	0.045	0.701	0.046	1.787	0.208