Citation:

2010JC006553

Name: (Table 1) Concentration of iron, DIP and silicic acid in water samples taken during Nathaniel B. Palmer cruises NBP06-01 and NBP06-08 (CORSACS I+II), Ross Sea
Published: 2011
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The Ross Sea polynya is among the most productive regions in the Southern Ocean and may constitute a significant oceanic CO2 sink. Based on results from several field studies, this region has been considered seasonally iron limited, whereby a "winter reserve" of dissolved iron (dFe) is progressively depleted during the growing season to low concentrations (~0.1 nM) that limit phytoplankton growth in the austral summer (December-February). Here we report new iron data for the Ross Sea polynya during austral summer 2005-2006 (27 December-22 January) and the following austral spring 2006 (16 November-3 December). The summer 2005-2006 data show generally low dFe concentrations in polynya surface waters (0.10 ± 0.05 nM in upper 40 m, n = 175), consistent with previous observations. Surprisingly, our spring 2006 data reveal similar low surface dFe concentrations in the polynya (0.06 ± 0.04 nM in upper 40 m, n = 69), in association with relatively high rates of primary production (~170-260 mmol C/m**2/d).

These results indicate that the winter reserve dFe may be consumed relatively early in the growing season, such that polynya surface waters can become "iron limited" as early as November; i.e., the seasonal depletion of dFe is not necessarily gradual. Satellite observations reveal significant biomass accumulation in the polynya during summer 2006-2007, implying significant sources of "new" dFe to surface waters during this period. Possible sources of this new dFe include episodic vertical exchange, lateral advection, aerosol input, and reductive dissolution of particulate iron.

Project(s):

International Polar Year (2007-2008) (IPY)

Coverage:

Median Latitude: -76.001000 * Median Longitude: 177.340500 * South-bound Latitude: -78.650000 * West-bound Longitude: 164.990000 * North-bound Latitude: -65.210000 * East-bound Longitude: -164.710000

Date/Time Start: 2005-12-29T00:00:00 * Date/Time End: 2006-12-03T00:00:00

Minimum DEPTH, water: 6 m * Maximum DEPTH, water: 1265 m

Event(s):

NBP0601_NX1 (CORSACS-1_NX1) * Latitude: -77.670000 * Longitude: 179.940000 * Date/Time: 2005-12-29T00:00:00 * Location: Ross Sea * Campaign: (CORSACS I) * Basis: Nathaniel B. Palmer * Method/Device: (NIS)

NBP0601_NX2 (CORSACS-1_NX2) * Latitude: -76.820000 * Longitude: 170.760000 * Date/Time: 2005-12-30T00:00:00 * Location: Ross Sea * Campaign: (CORSACS I) * Basis: Nathaniel B. Palmer * Method/Device: (NIS)

NBP0601_NX3 (CORSACS-1_NX3) * Latitude: -76.490000 * Longitude: 166.330000 * Date/Time: 2006-01-01T00:00:00 * Location: Ross Sea * Campaign: (CORSACS I) * Basis: Nathaniel B. Palmer * Method/Device: (NIS)

Comment:

Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event
2	Mixed layer depth	MLD	m	Sedwick, Peter	determined based on Delta sigma t = 0.05.
3	DEPTH, water	Depth water	m		Geocode
4	Iron, dissolved	Fe diss	nmol/l	Sedwick, Peter
5	Iron, dissolvable	Fe dissolvable	nmol/l	Sedwick, Peter	TDFe
6	Iron, particulate	Fe part	nmol/l	Sedwick, Peter	acid-labile particulate iron (ALPFe = TDFe - dFe)
7	Nitrate and Nitrite	[NO3]- + [NO2]-	µmol/l	Sedwick, Peter	dissolved inorganic NO3+NO2
8	Phosphorus, inorganic, dissolved	DIP	µmol/l	Sedwick, Peter
9	Silicic acid	Si(OH)4	µmol/l	Sedwick, Peter

License:

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

Size:

1365 data points

Data

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

1 Event	2 MLD [m]	3 Depth water [m]	4 Fe diss [nmol/l]	5 Fe dissolvable [nmol/l]	6 Fe part [nmol/l]	7 [NO3]- + [NO2]- [µmol/l]	8 DIP [µmol/l]	9 Si(OH)4 [µmol/l]
NBP0601_NX1		6	0.34	1.03	0.69	16.7	1.4	79.8
NBP0601_NX1		16	0.12	0.73	0.61	18.4	1.7	83.1
NBP0601_NX1		36	0.07	0.73	0.66	20.1	1.6	71.6
NBP0601_NX1		56	0.11	1.07	0.96	14.1	1.7	50.0
NBP0601_NX1		76	0.30	2.01	1.71	22.9	2.0	80.0
NBP0601_NX1		96	0.21	2.81	2.60	26.5	2.2	82.1
NBP0601_NX1		296	0.18	3.62	3.44	24.3	2.0	70.0
NBP0601_NX2	56	6	0.17	1.75	1.59	15.2	1.4	79.4
NBP0601_NX2	56	16	0.09	1.85	1.76	16.4	1.4	79.6
NBP0601_NX2	56	36	0.16	2.19	2.03	19.3	1.6	79.7
NBP0601_NX2	56	56	0.17	2.27	2.10	17.2	1.6	69.1
NBP0601_NX2	56	76	0.27	3.32	3.05	24.0	1.9	81.4
NBP0601_NX2	56	96	0.21	3.47	3.26	25.3	1.9	81.5
NBP0601_NX2	56	146	0.22	4.00	3.78	27.4	2.0	81.6
NBP0601_NX2	56	196	0.36	3.86	3.50	30.3	2.2	81.8
NBP0601_NX2	56	296	0.28	2.85	2.58	29.9	2.1	78.2
NBP0601_NX3	6	6	0.31	0.91	0.60	20.0	1.5	68.9
NBP0601_NX3	6	16	0.13	0.78	0.66	25.0	2.0	74.1
NBP0601_NX3	6	36	0.17	1.33	1.16	30.1	2.3	78.1
NBP0601_NX3	6	56	0.22	1.55	1.33	31.4	2.2	78.7
NBP0601_NX3	6	76	0.38	2.21	1.83	31.0	2.2	78.9
NBP0601_NX3	6	96	0.32	1.81	1.50	31.0	2.3	79.6
NBP0601_NX3	6	146	0.45	1.91	1.46	31.6	2.3	79.7
NBP0601_NX3	6	196	0.53	2.36	1.83	32.2	2.3	80.6
NBP0601_NX3	6	296	0.51	3.62	3.11	32.1	2.3	81.6
NBP0601_NX4	60	6	0.12	0.85	0.73	17.8	1.4	74.9
NBP0601_NX4	60	16	0.06	0.76	0.70	18.8	1.4	79.7
NBP0601_NX4	60	36	0.08	0.67	0.59	17.5	1.4	74.5
NBP0601_NX4	60	56	0.06	0.78	0.72	17.6	1.4	74.1
NBP0601_NX4	60	76	0.08	0.87	0.79	17.6	1.4	74.0
NBP0601_NX4	60	96	0.14	1.35	1.21	24.4	1.9	77.4
NBP0601_NX4	60	146	0.22	2.80	2.58	29.2	2.2	79.5
NBP0601_NX4	60	196	0.31	11.10	10.79	30.9	2.2	80.2
NBP0601_NX4	60	231	0.31	24.26	23.95	31.2	2.2	81.2
NBP0601_NX5	54	6	0.17	0.43	0.26	21.2	1.5	81.0
NBP0601_NX5	54	16	0.14	0.40	0.27	22.5	1.6	82.2
NBP0601_NX5	54	36	0.12	0.47	0.36	24.1	1.8	81.9
NBP0601_NX5	54	56	0.13	0.49	0.36	26.3	2.0	82.8
NBP0601_NX5	54	76	0.15	0.94	0.78	28.2	2.0	84.5
NBP0601_NX5	54	96	0.13	0.79	0.66	28.8	2.1	83.8
NBP0601_NX5	54	146	0.18	1.70	1.52	30.0	2.2	85.8
NBP0601_NX5	54	196	0.29	2.81	2.53	30.7	2.2	87.4
NBP0601_NX5	54	296	0.30	4.90	4.59	30.7	2.2	87.3
NBP0601_NX6	31	6	0.22	0.28	0.06	20.6	1.4	71.2
NBP0601_NX6	31	16	0.10	0.31	0.21	20.5	1.5	71.1
NBP0601_NX6	31	36	0.11	0.64	0.54	27.7	2.0	82.3
NBP0601_NX6	31	56	0.13	0.96	0.83	28.8	2.0	82.5
NBP0601_NX6	31	76	0.15	1.30	1.16	28.1	2.1	82.9
NBP0601_NX6	31	96	0.24	6.41	6.16	31.4	2.3	90.0
NBP0601_NX6	31	146	0.16	2.83	2.68	30.1	2.2	89.5
NBP0601_NX6	31	196	0.15	1.71	1.57	29.4	2.1	91.3
NBP0601_NX6	31	296	0.20	3.33	3.13	31.2	2.2	84.7
NBP0601_NX7	46	6	0.22	0.37	0.15	18.0	1.1	58.4
NBP0601_NX7	46	16	0.07	0.41	0.34	18.0	1.1	58.7
NBP0601_NX7	46	36	0.07	0.36	0.30	17.9	1.2	58.7
NBP0601_NX7	46	56	0.08	0.49	0.42	17.6	1.2	62.8
NBP0601_NX7	46	76	0.12	0.81	0.69	26.9	2.1	77.6
NBP0601_NX7	46	96	0.09	1.45	1.37	27.6	2.1	80.3
NBP0601_NX7	46	146	0.14	3.10	2.96	30.8	2.2	87.5
NBP0601_NX7	46	196	0.15	2.90	2.76	30.9	2.3	81.9
NBP0601_NX7	46	296	0.20	7.45	7.25	31.1	2.3	81.8
NBP0601_NX8	31	6	0.17	0.62	0.45	18.2	1.3	68.0
NBP0601_NX8	31	16	0.09	0.25	0.17	16.5	1.4	68.5
NBP0601_NX8	31	36	0.07	0.29	0.22	23.9	2.1	79.1
NBP0601_NX8	31	56	0.08	0.42	0.35	29.2	2.1	79.9
NBP0601_NX8	31	76	0.13	0.79	0.66	29.1	2.3	86.6
NBP0601_NX8	31	96	0.10	0.97	0.87	28.7	2.3	81.8
NBP0601_NX8	31	146	0.15	1.65	1.50	30.0	2.3	83.5
NBP0601_NX8	31	196	0.19	2.69	2.50	31.0	2.4	85.5
NBP0601_NX8	31	296	0.24	5.32	5.08	30.2	2.3	90.2
NBP0601_NX9	13	6	0.16	1.71	1.55	21.3	1.6	87.3
NBP0601_NX9	13	16	0.13	1.81	1.68	21.7	1.6	87.5
NBP0601_NX9	13	36	0.15	1.47	1.32	23.1	1.7	88.1
NBP0601_NX9	13	56	0.13	1.50	1.38	24.1	1.8	82.3
NBP0601_NX9	13	76	0.21	2.00	1.79	24.8	1.9	89.9
NBP0601_NX9	13	96	0.21	1.89	1.69	25.3	1.8	90.6
NBP0601_NX9	13	146	0.33	10.79	10.46	26.3	1.9	91.1
NBP0601_NX9	13	196	0.19	1.90	1.71	27.8	2.0	83.3
NBP0601_NX9	13	296	0.11	2.43	2.32	29.6	2.1	88.4
NBP0601_NX10	29	6	0.28	1.10	0.82	20.8	1.3	62.1
NBP0601_NX10	29	16	0.18	1.11	0.93	29.2	1.2	61.6
NBP0601_NX10	29	36	0.19	1.02	0.83	23.6	1.7	67.4
NBP0601_NX10	29	56	0.19	1.26	1.07	28.1	2.2	76.1
NBP0601_NX10	29	76	0.30	1.64	1.34	28.2	2.2	75.5
NBP0601_NX10	29	96	0.35	1.74	1.39	28.4	2.3	74.9
NBP0601_NX10	29	146	0.40	1.92	1.52	28.3	2.2	74.7
NBP0601_NX10	29	196	0.28	1.68	1.40	26.8	2.1	69.0
NBP0601_NX10	29	296	0.34	1.76	1.42	27.8	2.2	73.1
NBP0601_NX10	29	496	0.69			35.0	2.0	78.4
NBP0601_NX10	29	596	0.64			34.0	2.0	80.3
NBP0601_NX10	29	696	0.68			34.1	2.0	77.8
NBP0601_NX10	29	796	0.64			33.9	2.0	77.6
NBP0601_NX11	43	6	0.27	0.35	0.08	19.4	1.2	56.1
NBP0601_NX11	43	16	0.08	0.21	0.13	19.4	1.2	55.6
NBP0601_NX11	43	36	0.08	0.28	0.19	19.5	1.3	56.2
NBP0601_NX11	43	56	0.09	0.41	0.33	26.2	2.1	77.0
NBP0601_NX11	43	76	0.12	0.70	0.58	29.1	2.3	81.5
NBP0601_NX11	43	96	0.20	1.97	1.77	30.9	2.3	85.5
NBP0601_NX11	43	146	0.18	3.03	2.85	29.8	2.6	81.7
NBP0601_NX11	43	196	0.21	3.55	3.34	30.5	2.3	83.5
NBP0601_NX11	43	296	0.33	3.74	3.41	30.7	2.3	82.3
NBP0601_NX11	43	396	0.42			30.7	2.4	87.3
NBP0601_NX11	43	496	1.31			30.3	2.3	83.9
NBP0608_NX12	27	6	0.15	0.22	0.08	30.6	2.2	64.0
NBP0608_NX12	27	16	0.08	0.18	0.11	30.6	2.2	64.2
NBP0608_NX12	27	36	0.07	0.19	0.12	30.7	2.2	68.8
NBP0608_NX12	27	56	0.06	0.20	0.14	30.8	2.2	63.7
NBP0608_NX12	27	76	0.10	0.19	0.08	31.0	2.3	64.0
NBP0608_NX12	27	96	0.08	0.29	0.21	31.2	2.2	66.1
NBP0608_NX12	27	146	0.18	0.34	0.16	34.6	2.5	78.4
NBP0608_NX12	27	196	0.21	0.34	0.13	34.2	2.4	86.1
NBP0608_NX12	27	296	0.27	0.39	0.12	33.6	2.3	88.1
NBP0608_NX12	27	600	0.47			33.0	2.3	94.0
NBP0608_NX12	27	900	0.45			32.6	2.3	102.9
NBP0608_NX12	27	965	0.34			32.6	2.3	104.9
NBP0608_NX12	27	1265	0.38			32.9	2.3	104.9
NBP0608_NX13	23	6	0.12	1.07	0.95	25.3	1.9	82.0
NBP0608_NX13	23	16	0.07	1.33	1.26	27.7	2.1	81.9
NBP0608_NX13	23	36	0.23	3.18	2.95	30.7	2.3	83.1
NBP0608_NX13	23	56	0.21	3.24	3.04	30.5	2.3	81.7
NBP0608_NX13	23	76	0.13	1.30	1.17	30.1	2.3	80.8
NBP0608_NX13	23	96	0.19	2.16	1.97	31.1	2.3	82.2
NBP0608_NX13	23	146	0.18	2.13	1.95	31.6	2.3	83.0
NBP0608_NX13	23	196	0.17	1.66	1.49	31.1	2.3	84.1
NBP0608_NX13	23	296	0.23	2.46	2.23	31.0	2.3	83.1
NBP0608_NX13	23	400	0.30	10.92	10.61	31.1	2.4	83.5
NBP0608_NX13	23	500	0.45	13.88	13.43	30.9	2.3	82.1
NBP0608_NX14	131	6	0.10	0.55	0.45	27.7	2.2	73.4
NBP0608_NX14	131	16	0.05	0.54	0.49	27.5	2.3	72.8
NBP0608_NX14	131	36	0.06	0.54	0.48	27.5	2.2	75.9
NBP0608_NX14	131	56	0.05	0.58	0.53	28.2	2.3	77.7
NBP0608_NX14	131	76	0.07	0.62	0.55	28.8	2.3	79.8
NBP0608_NX14	131	96	0.06	0.57	0.51	29.1	2.3	79.0
NBP0608_NX14	131	146	0.12	1.13	1.01	29.5	2.4	81.2
NBP0608_NX14	131	196	0.16	1.86	1.70	29.9	2.4	82.4
NBP0608_NX14	131	296	0.19	1.62	1.43	30.1	2.5	82.6
NBP0608_NX14	131	375	0.30	0.31	0.02	29.7	2.5	79.6
NBP0608_NX14	131	450	0.37	0.41	0.04	29.7	2.5	79.0
NBP0608_NX15		6	0.09	1.95	1.87	29.8	2.0	86.3
NBP0608_NX15		16	0.11	1.99	1.88	29.5	2.0	86.0
NBP0608_NX15		36	0.08	1.95	1.87	29.0	2.0	84.1
NBP0608_NX15		56	0.08	2.00	1.93	28.8	1.9	82.8
NBP0608_NX15		76	0.09	2.12	2.03	28.8	1.9	82.9
NBP0608_NX15		96	0.09	2.30	2.21	29.0	2.0	82.8
NBP0608_NX15		146	0.16	3.54	3.39	31.3	2.1	87.0
NBP0608_NX15		196	0.14	1.28	1.13	31.5	2.1	84.0
NBP0608_NX15		296	0.20	3.05	2.85	31.1	2.1	82.1
NBP0608_NX15		375	0.22	0.44	0.22	30.9	2.1	84.4
NBP0608_NX16	80	6	0.12	1.38	1.26	25.6	1.8	82.5
NBP0608_NX16	80	16	0.08	1.47	1.39	25.8	1.9	82.2
NBP0608_NX16	80	56	0.10	1.40	1.30	25.7	1.8	81.2
NBP0608_NX16	80	76	0.04	1.75	1.70	27.0	2.1	81.1
NBP0608_NX16	80	96	0.16	3.57	3.41	30.5	2.3	81.1
NBP0608_NX16	80	146	0.19	2.47	2.29	30.4	2.4	80.9
NBP0608_NX16	80	196	0.15	2.24	2.09	30.4	2.2	82.2
NBP0608_NX16	80	296	0.20	4.96	4.76	30.9	2.2	77.0
NBP0608_NX16	80	400	0.27	3.86	3.59	30.6	2.2	77.1
NBP0608_NX16	80	500	0.33	8.16	7.83	30.5	2.3	81.2
NBP0608_NX17	70	6	0.23	1.05	0.82	25.9	1.8	81.0
NBP0608_NX17	70	16	0.09	0.60	0.51	28.0	2.0	79.2
NBP0608_NX17	70	36	0.06	0.76	0.69	26.7	1.8	81.3
NBP0608_NX17	70	56	0.07	0.66	0.59	27.1	1.9	80.9
NBP0608_NX17	70	76	0.09	0.83	0.73	28.6	2.0	80.6
NBP0608_NX17	70	96	0.05	0.85	0.79	28.8	2.2	79.9
NBP0608_NX17	70	146	0.07	0.84	0.77	30.2	2.1	81.0
NBP0608_NX17	70	196	0.17	1.73	1.56	31.0	2.1	81.9
NBP0608_NX17	70	246	0.33	18.98	18.65	31.1	2.1	82.0
NBP0608_NX18	156	6	0.05	1.25	1.19	24.9	2.0	83.1
NBP0608_NX18	156	16	0.04	1.06	1.01	24.9	2.0	82.8
NBP0608_NX18	156	36	0.05	1.28	1.24	27.2	2.2	84.4
NBP0608_NX18	156	56	0.05	1.16	1.11	28.4	2.2	84.6
NBP0608_NX18	156	76	0.06	1.77	1.71	29.9	2.4	83.4
NBP0608_NX18	156	96	0.05	1.98	1.94	29.6	2.3	83.9
NBP0608_NX18	156	146	0.06	1.70	1.64	29.8	2.4	84.6
NBP0608_NX18	156	196	0.11	2.37	2.26	30.5	2.4	83.3
NBP0608_NX18	156	296	0.10	1.71	1.62	30.6	2.4	84.3
NBP0608_NX18	156	400	0.21	2.58	2.37	31.1	2.5	81.4
NBP0608_NX18	156	500	0.25	2.85	2.60	31.4	2.5	80.5
NBP0608_NX18	156	600	0.34	24.52	24.18	31.6	2.5	83.5
NBP0608_NX18	156	700	0.43	68.40	67.98	31.5	2.5	81.6
NBP0608_NX19	123	6	0.08	0.70	0.62	25.6	1.6	75.7
NBP0608_NX19	123	16	0.04	0.68	0.65	27.0	1.8	79.2
NBP0608_NX19	123	36	0.06	1.07	1.01	29.9	1.8	77.3
NBP0608_NX19	123	56	0.10	1.25	1.15	30.5	2.1	78.2
NBP0608_NX19	123	76	0.07	1.17	1.10	29.5	2.0	78.8
NBP0608_NX19	123	96	0.09	1.22	1.14	30.0	2.0	78.3
NBP0608_NX19	123	146	0.11	1.84	1.73	30.9	2.1	81.7
NBP0608_NX19	123	196	0.12	2.21	2.09	30.6	2.1	80.9
NBP0608_NX19	123	296	0.09	1.12	1.03	30.3	2.1	80.1
NBP0608_NX19	123	375	0.30	6.80	6.50	31.0	2.1	79.7
NBP0608_NX19	123	475	0.43	16.66	16.23	31.2	2.1	79.4
NBP0608_NX20	11	6	0.04	0.40	0.37	24.2	1.7	79.9
NBP0608_NX20	11	16	0.06	0.47	0.41	26.6	2.0	77.8
NBP0608_NX20	11	36	0.05	0.92	0.86	25.3	2.0	82.7
NBP0608_NX20	11	56	0.05	0.81	0.76	27.5	2.1	78.7
NBP0608_NX20	11	76	0.06	0.75	0.69	28.3	2.2	78.7
NBP0608_NX20	11	96	0.05	0.86	0.81	28.7	2.2	79.3
NBP0608_NX20	11	146	0.06	0.91	0.85	30.4	2.3	80.0
NBP0608_NX20	11	196	0.11	2.31	2.20	30.6	2.3	79.9
NBP0608_NX20	11	296	0.32	12.08	11.76	31.0	2.3	80.3
NBP0608_NX20	11	296	0.34