Citation:

PANGAEA.989247

Name: CTD and POC flux in western North Pacific in July 2023
Published: 2026-02-28
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Chl-a; CTD profile; d13C; POC flux; western North Pacific

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Published: 2026-02-28 • DOI registered: 2026-03-28

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Abstract:

Here we present conductivity–temperature–depth (CTD) data, chlorophyll-a (Chl-a) profiles, particulate organic carbon (POC) fluxes, and stable carbon isotope (δ¹³C) compositions from five stations (P1–P5) in the low-latitude western North Pacific (6–13°N, 131.98–134.99°E). Data were collected during July–August 2023 aboard R/V Legend. The CTD system was a Sea-Bird Electronics SBE 9 equipped with a WETStar fluorometer. POC concentrations were determined using a Vario EL Cube elemental analyzer. POC fluxes were calculated from samples collected by floating sediment traps. Stable carbon isotope (δ¹³C) compositions of POC in floating-trap samples were analyzed with a continuous-flow isotope-ratio mass spectrometer (MAT253, Thermo Finnigan, San Jose, CA, USA) coupled to an elemental analyzer (EA1108, Carlo Erba Instruments) via a Conflo III interface (Thermo Finnigan, San Jose, CA, USA).

Keyword(s):

Chl-a; CTD profile; d13C; POC flux; western North Pacific

Funding:

National Science and Technology Council, Taiwan, grant/award no. NSTC 111-2119-M-019-002

National Science and Technology Council, Taiwan, grant/award no. NSTC 112-2119-M-019-008

National Science and Technology Council, Taiwan, grant/award no. NSTC 113-2119-M-019-008

National Science and Technology Council, Taiwan, grant/award no. NSTC 114-2119-M-019-002

Coverage:

Median Latitude: 9.359734 * Median Longitude: 134.213482 * South-bound Latitude: 6.010000 * West-bound Longitude: 131.980000 * North-bound Latitude: 13.000000 * East-bound Longitude: 134.990000

Date/Time Start: 2023-07-08T00:00:00 * Date/Time End: 2023-07-26T00:00:00

Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 1000 m

Event(s):

LGD_2309-P1 * Latitude Start: 10.020000 * Longitude Start: 131.980000 * Latitude End: 10.020000 * Longitude End: 131.980000 * Date/Time Start: 2023-07-08T00:00:00 * Date/Time End: 2023-07-09T00:00:00 * Elevation Start: -9.0 m * Elevation End: -1000.0 m * Campaign: * Basis: * Method/Device: CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar

LGD_2309-P2 * Latitude Start: 13.000000 * Longitude Start: 134.110000 * Latitude End: 13.000000 * Longitude End: 134.110000 * Date/Time Start: 2023-07-11T00:00:00 * Date/Time End: 2023-07-12T00:00:00 * Elevation Start: -20.0 m * Elevation End: -1000.0 m * Campaign: * Basis: * Method/Device: CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar

LGD_2309-P3 * Latitude Start: 9.990000 * Longitude Start: 134.990000 * Latitude End: 9.990000 * Longitude End: 134.990000 * Date/Time Start: 2023-07-14T00:00:00 * Date/Time End: 2023-07-15T00:00:00 * Elevation Start: -5.0 m * Elevation End: -1000.0 m * Campaign: * Basis: * Method/Device: CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Campaign	Campaign		Hsieh, Hsueh-Han
2	Event label	Event		Hsieh, Hsueh-Han
3	Station label	Station		Hsieh, Hsueh-Han
4	Sample code/label	Sample label		Hsieh, Hsueh-Han
5	Date/time start	Date/time start		Hsieh, Hsueh-Han
6	Date/time end	Date/time end		Hsieh, Hsueh-Han
7	LATITUDE	Latitude		Hsieh, Hsueh-Han		Geocode
8	LONGITUDE	Longitude		Hsieh, Hsueh-Han		Geocode
9	DEPTH, water	Depth water	m	Hsieh, Hsueh-Han		Geocode
10	Salinity	Sal		Hsieh, Hsueh-Han	CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar
11	Temperature, water	Temp	°C	Hsieh, Hsueh-Han	CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar
12	Chlorophyll a	Chl a	mg/m³	Hsieh, Hsueh-Han	CTD, Sea-Bird, SBE 9; measured with Fluorometer, WETStar
13	Carbon, organic, particulate	POC	mg/m³	Hsieh, Hsueh-Han	Elemental analyzer, Vario EL Cube
14	Carbon, organic, particulate, flux	POC flux	mg/m²/day	Hsieh, Hsueh-Han	Elemental analyzer, Vario EL Cube
15	δ13C	δ13C	‰	Hsieh, Hsueh-Han	Continuous-flow isotope-ratio mass spectrometry (CF-IRMS), MAT253, Thermo Finnigan; coupled with an elemental analyzer, EA 1108, Carlo Erba; via a Conflo III interface, Thermo Finnigan

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

36242 data points

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