Citation:

ngeo2543

Name: Deep-Ocean dissolved organic matter in hydrothermal vents
Published: 2015
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2015 (exact date unknown) • DOI registered: 2016-12-01

RIS Citation BibTeX Citation Text Citation ShareShow Map Google Earth

Abstract:

Oceanic dissolved organic carbon (DOC) is an important carbon pool, similar in magnitude to atmospheric CO2, but the fate of its oldest forms is not well understood (Dittmar and Stubbins, 2014; Hansell, 2013, doi:10.1146/annurev-marine-120710-100757). Hot hydrothermal circulation may facilitate the degradation of otherwise un-reactive dissolved organic matter, playing an important role in the long-term global carbon cycle. The oldest, most recalcitrant forms of DOC, which make up most of oceanic DOC, can be recovered by solid-phase extraction. Here we present measurements of solid-phase extractable DOC from samples collected between 2009 and 2013 at seven vent sites in the Atlantic, Pacific and Southern oceans, along with magnesium concentrations, a conservative tracer of water circulation through hydrothermal systems. We find that magnesium and solid-phase extractable DOC concentrations are correlated, suggesting that solid-phase extractable DOC is almost entirely lost from solution through mineralization or deposition during circulation through hydrothermal vents with fluid temperatures of 212-401 °C. In laboratory experiments, where we heated samples to 380 °C for four days, we found a similar removal efficiency. We conclude that thermal degradation alone can account for the loss of solid-phase extractable DOC in natural hydrothermal systems, and that its maximum lifetime is constrained by the timescale of hydrothermal cycling, at about 40 million years (Elderfield and Schultz, 1996, doi:10.1146/annurev.earth.24.1.191).

Related to:

Vent site DOC summary

Coverage:

Median Latitude: 10.880999 * Median Longitude: -75.845948 * South-bound Latitude: -56.088930 * West-bound Longitude: 130.763330 * North-bound Latitude: 48.000000 * East-bound Longitude: -30.188980

Date/Time Start: 2001-07-21T00:13:00 * Date/Time End: 2011-07-31T05:22:00

Minimum Elevation: -3034.0 m * Maximum Elevation: -800.0 m

Event(s):

AMK47-Lost_City * Latitude: 30.125000 * Longitude: -42.117000 * Elevation: -800.0 m * Location: Lost City Hydrothermal Field, Mid-Atlantic Ridge * Campaign: * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)

J2-574 * Latitude: 47.900000 * Longitude: -129.000000 * Date/Time: 2001-07-21T00:13:00 * Elevation: -2192.0 m * Campaign: * Basis: * Method/Device: Remote operated vehicle Jason II (ROVJ)

J2-575 * Latitude: 47.900000 * Longitude: -129.000000 * Date/Time: 2011-07-21T16:23:00 * Elevation: -2203.0 m * Campaign: * Basis: * Method/Device: Remote operated vehicle Jason II (ROVJ)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Hawkes, Jeffrey A
2	Latitude of event	Latitude		Hawkes, Jeffrey A
3	Longitude of event	Longitude		Hawkes, Jeffrey A
4	Identification	ID		Hawkes, Jeffrey A
5	Ocean and sea region	OS region		Hawkes, Jeffrey A
6	Site	Site		Hawkes, Jeffrey A	vent
7	Name	Name		Hawkes, Jeffrey A	vent
8	Sampling date	Sampling date		Hawkes, Jeffrey A	year
9	Sample type	Samp type		Hawkes, Jeffrey A
10	Type	Type		Hawkes, Jeffrey A	flow
11	Lithology/composition/facies	Lithology		Hawkes, Jeffrey A
12	Description	Description		Hawkes, Jeffrey A	geochemistry
13	Magnesium	Mg	mmol/l	Hawkes, Jeffrey A
14	Carbon, organic, dissolved	DOC	µmol/l	Hawkes, Jeffrey A
15	Precision	Precis		Hawkes, Jeffrey A	DOC [µmol/l]
16	Solid phase extractable	SPE	µmol/l	Hawkes, Jeffrey A
17	Precision	Precis		Hawkes, Jeffrey A	SPE [µmol/l]
18	Sample volume	Samp vol	ml	Hawkes, Jeffrey A
19	Volume	Vol	ml	Hawkes, Jeffrey A	extracted
20	Factor	Factor		Hawkes, Jeffrey A	Extract dilution factor for SPEDOC analysis
21	Carbon, organic, dissolved, extracted	DOC extr	µmol/l	Hawkes, Jeffrey A	SPEDOC in extract
22	Error	Error		Hawkes, Jeffrey A	SPEDOC in extract
23	Carbon, organic, dissolved, extracted	DOC extr	µmol/l	Hawkes, Jeffrey A	Procedural SPEDOC extract blank
24	Precision	Precis		Hawkes, Jeffrey A	Extract Blank precision
25	Error	Error		Hawkes, Jeffrey A	Extract blank error [µmol/l]
26	Carbon, organic, dissolved, extracted	DOC extr	µmol/l	Hawkes, Jeffrey A	SPEDOC extract blank subtracted
27	Error	Error		Hawkes, Jeffrey A	Extract error [µmol/l]
28	Carbon, organic, dissolved, extracted	DOC extr	µmol/l	Hawkes, Jeffrey A	SPEDOC
29	Error	Error		Hawkes, Jeffrey A	SPEDOC error
30	Percentage	Perc	%	Hawkes, Jeffrey A
31	Contamination	Contamination		Hawkes, Jeffrey A
32	Comment	Comment		Hawkes, Jeffrey A	Bulk DOC quality control
33	Comment 2 (continued)	Comm 2		Hawkes, Jeffrey A	Reason for omission from paper

License:

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

Size:

4130 data points

Download Data

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

View dataset as HTML (shows only first 2000 rows)