Citation:

PANGAEA.793329

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Abstract:

Three conical sediment were deployed at three depths 968 m (top trap), 1976 m (middletrap), and 2938 m (50mabove the bottom, bottom trap) - from June 27, 2004 to April 27, 2005 on the NW Atlantic margin at a water depth of 2988 m. The sediment trap carousels were programmed to open each collection cup for 23.4 days for the top trap and 14.5 days for the other two traps, resulting in total 13 samples from the top trap and 21 samples each from the middle and bottom traps. The samples were analyzed for the biogeochemical properties with various methods.

Frequent occurrences of higher fluxes in deep relative to shallower sediment traps and low delta 14C values of sinking POC together provide strong evidence for significant lateral transport of aged organic matter over the margin. Comparison of biogeochemical properties such as aluminum concentration and flux, and iron concentration between samples intercepted at different depths shows that particles collected by the deepest trap had more complex sources than the shallower ones. These data also suggest that at least two modes of lateral transport exist over the New England margin. Based on radio carbon mass balance, about 30% (± 10%) of sinking POC in all sediment traps is estimated to be derived from lateral transport of re-suspended sediment. A strong correlation between delta 14C values and aluminum concentrations suggests that the aged organic matter is associated with lithogenic particles.

Related to:

Hwang, Jeomshik; Manganini, Steven J; Montluçon, Daniel; Eglinton, Timothy Ian (2009): Dynamics of particle export on the Northwest Atlantic margin. Deep Sea Research Part I: Oceanographic Research Papers, 56, 1792-1803, https://doi.org/10.1016/j.dsr.2009.05.007

Coverage:

Latitude: 39.466000 * Longitude: -68.366000

Date/Time Start: 2004-06-26T00:00:00 * Date/Time End: 2005-04-12T00:00:00

Minimum DEPTH, water: 968 m * Maximum DEPTH, water: 2938 m

Event(s):

NWAtlantic_04-05_TRAPS * Latitude: 39.466000 * Longitude: -68.366000 * Date/Time Start: 2004-06-27T00:00:00 * Date/Time End: 2005-04-27T00:00:00 * Location: Atlantic * Method/Device: Trap, sediment (TRAPS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	DEPTH, water	Depth water	m			Geocode
3	DATE/TIME	Date/Time				Geocode
4	Date/time end	Date/time end		Hwang, Jeomshik
5	Duration, number of days	Duration	days	Hwang, Jeomshik
6	Sample code/label	Sample label		Hwang, Jeomshik
7	Treatment	Treat		Hwang, Jeomshik	see reference(s)
8	Flux of total mass	Flux tot	mg/m²/day	Hwang, Jeomshik	see reference(s)	> 1mm
9	Flux of total mass	Flux tot	mg/m²/day	Hwang, Jeomshik	see reference(s)	> 1mm
10	Carbon, organic, particulate, flux	POC flux	mg/m²/day	Hwang, Jeomshik	see reference(s)
11	Aluminium, flux	Al flux	mg/m²/day	Hwang, Jeomshik	see reference(s)
12	Δ14C	Δ14C	‰	Hwang, Jeomshik	see reference(s)	TOC
13	δ13C, organic carbon	δ13C Corg	‰ PDB	Hwang, Jeomshik	see reference(s)	TOC
14	Fatty acids	Fatty acids	%	Hwang, Jeomshik	see reference(s)	long-chain
15	Carbon, total	TC	%	Hwang, Jeomshik	see reference(s)
16	Nitrogen, total	TN	%	Hwang, Jeomshik	see reference(s)
17	Carbon, inorganic, particulate	PIC	%	Hwang, Jeomshik	see reference(s)
18	Carbon, organic, particulate	POC	%	Hwang, Jeomshik	see reference(s)
19	Carbon, organic/Nitrogen, total ratio	C org/TN		Hwang, Jeomshik	see reference(s)
20	Aluminium	Al	%	Hwang, Jeomshik	see reference(s)
21	Calcium	Ca	%	Hwang, Jeomshik	see reference(s)
22	Silicon	Si	%	Hwang, Jeomshik	see reference(s)
23	Iron	Fe	%	Hwang, Jeomshik	see reference(s)
24	Organic matter, particulate	POM	%	Hwang, Jeomshik	see reference(s)
25	Calcium carbonate	CaCO3	%	Hwang, Jeomshik	see reference(s)
26	Opal, biogenic silica	bSiO2	%	Hwang, Jeomshik	see reference(s)
27	Lithogenic material	Litho	%	Hwang, Jeomshik	see reference(s)
28	Biogenic silica, opal/calcium carbonate ratio	bSiO2/CaCO3		Hwang, Jeomshik	see reference(s)

License:

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

Size:

1261 data points

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