Croot, Peter L; Bowie, Andrew R; Frew, Russell; Maldonado, Maria T; Hall, Julie A; Safi, Karl A; La Roche, Julie; Boyd, Philip W; Law, Cliff S (2014): Dissolved iron and Fe(II) in an iron induced Southern Ocean phytoplankton bloom measured during TANGAROA cruise SOIREE [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.832530, Supplement to: Croot, PL et al. (2001): Retention of dissolved iron and Fe II in an iron induced Southern Ocean phytoplankton bloom. Geophysical Research Letters, 28(18), 3425-3428, https://doi.org/10.1029/2001GL013023
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Abstract:
During the 13 day Southern Ocean Iron RE-lease Experiment (SOIREE), dissolved iron concentrations decreased rapidly following each of three iron-enrichments, but remained high (>1 nM, up to 80% as FeII) after the fourth and final enrichment on day 8. The former trend was mainly due to dilution (spreading of iron-fertilized waters) and particle scavenging. The latter may only be explained by a joint production-maintenance mechanism; photoreduction is the only candidate process able to produce sufficiently high FeII, but as such levels persisted overnight (8 hr dark period) -ten times the half-life for this species- a maintenance mechanism (complexation of FeII) is required, and is supported by evidence of increased ligand concentrations on day 12. The source of these ligands and their affinity for FeII is not known. This retention of iron probably permitted the longevity of this bloom raising fundamental questions about iron cycling in HNLC (High Nitrate Low Chlorophyll) Polar waters.
Coverage:
Median Latitude: -60.984458 * Median Longitude: 140.018708 * South-bound Latitude: -61.123300 * West-bound Longitude: 139.230000 * North-bound Latitude: -60.900700 * East-bound Longitude: 140.645700
Date/Time Start: 1999-02-09T13:13:00 * Date/Time End: 1999-02-22T08:21:00
Minimum DEPTH, water: 40 m * Maximum DEPTH, water: 40 m
Event(s):
T1136-1 * Latitude: -60.978500 * Longitude: 139.230000 * Date/Time: 1999-02-09T13:13:00 * Location: Southern Ocean - Australasian-Pacific Sector * Campaign: SOIREE * Basis: Tangaroa * Method/Device: Go-Flo bottles (GOFLO) * Comment: OUT-patch of the iron-fertilized area
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Comment | Comment | In/Out patch | |||
| 3 | Date/Time of event | Date/Time | ||||
| 4 | Latitude of event | Latitude | ||||
| 5 | Longitude of event | Longitude | ||||
| 6 | DEPTH, water | Depth water | m | Geocode | ||
| 7 | Iron-binding ligand, dissolved | FeL diss | nmol/l | Croot, Peter L | ||
| 8 | Error | Error | Croot, Peter L | Voltammetry | Iron-binding ligand | |
| 9 | Iron, dissolved, conditional complex stability | Fe LogK´ diss | Croot, Peter L | Voltammetry | K is relative to Fe' where aFe' is 10**10 | |
| 10 | Error | Error | Croot, Peter L | Voltammetry | Log K | |
| 11 | Iron, dissolved | Fe diss | nmol/l | Croot, Peter L | Voltammetry |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
64 data points
Data
| 1 Event | 2 Comment (In/Out patch) | 3 Date/Time | 4 Latitude | 5 Longitude | 6 Depth water [m] | 7 FeL diss [nmol/l] | 8 Error (Iron-binding ligand) | 9 Fe LogK´ diss (K is relative to Fe' where aF...) | 10 Error (Log K) | 11 Fe diss [nmol/l] |
|---|---|---|---|---|---|---|---|---|---|---|
| T1136-1 | Out | 1999-02-09T13:13 | -60.9785 | 139.2300 | 40 | 0.250 | ||||
| T1139-1 | In | 1999-02-10T17:48 | -60.9870 | 139.4633 | 40 | 3.520 | ||||
| T1140-6 | In | 1999-02-12T07:32 | -60.9458 | 139.7282 | 40 | 3.49 | 0.07 | 12.28 | 0.78 | 3.260 |
| T1141-6 | Out | 1999-02-12T17:04 | -60.9667 | 139.4595 | 40 | 3.61 | 0.49 | 12.08 | 1.96 | 0.080 |
| T1144-6 | In | 1999-02-14T09:38 | -60.9327 | 139.9288 | 40 | 4.71 | 0.75 | 10.94 | 0.48 | 0.683 |
| T1151-5 | In | 1999-02-16T09:08 | -60.9007 | 140.0863 | 40 | 4.16 | 0.82 | 10.62 | 0.68 | 4.880 |
| T1152-5 | Out | 1999-02-16T17:56 | -61.1233 | 140.1375 | 40 | 2.71 | 0.40 | 11.23 | 0.92 | 0.630 |
| T1158-5 | In | 1999-02-18T15:17 | -60.9250 | 140.2367 | 40 | 4.27 | 0.12 | 11.12 | 0.13 | 2.350 |
| T1159-6 | In | 1999-02-19T12:25 | -60.9652 | 140.2758 | 40 | 2.41 | 0.62 | 11.07 | 1.08 | 1.340 |
| T1160-3 | Out | 1999-02-19T20:16 | -60.9703 | 140.6300 | 40 | 1.04 | 0.03 | 12.98 | 0.92 | 0.480 |
| T1162-4 | In | 1999-02-20T13:35 | -61.0170 | 140.4027 | 40 | 4.45 | 0.38 | 11.53 | 0.73 | 1.135 |
| T1171-5 | In | 1999-02-22T08:21 | -61.1013 | 140.6457 | 40 | 9.20 | 2.82 | 11.19 | 1.13 | 1.340 |