Citation:

PANGAEA.939667

Name: Dissolved inorganic and organic nutrients from water column samples during RV Maria S. Merian cruise MSM80 off the northern Humboldt Upwelling System
Published: 2021-12-17
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Dissolved Inorganic Nutrients; dissolved organic nitrogen; dissolved organic phosphorus; eastern tropical South Pacific; Humboldt Current System

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Abstract:

This data is part of the BMBF projects CUSCO (Coastal Upwelling Systems in a Changing Ocean) and BioTip subproject Humboldt Tipping. Data was collected during cruise number MSM80 with research vessel Maria S. Merian from 23.12.2018 - 30.01.2019 (from Panama to Valparaiso) in the Humboldt Upwelling system off the Eastern Tropical south Pacific. Samples were taken by CTD- rosette sampler from different depths and analysed onboard for dissolved inorganic nutrients and total dissolved nutrients. Triplicate nutrient samples were analysed for concentrations with an autosampler (XY-2 autosampler, SEAL Analytical) and a continuous flow analyzer (QUAAtro Autoanalyzer, SEAL Analytical) using standard colorimetric and flourometric methods by Kastriot Qelaj. Dissolved organic nutrients were calculated as the difference of the two for respective nitrogen and phosphorous nutrients. Phosphate was measured according to Murphy and Riley (1962). Ammonium was measured fluorometrically based on Holmes et al. (1999). An empty cell means that corresponding nutrient samples were not taken for the respective depth.

Keyword(s):

Dissolved Inorganic Nutrients; dissolved organic nitrogen; dissolved organic phosphorus; eastern tropical South Pacific; Humboldt Current System

Supplement to:

Kittu, Leila; Paul, Allanah Joy; Fernández-Méndez, Mar; Hopwood, Mark James; Riebesell, Ulf (2023): Coastal N 2 Fixation Rates Coincide Spatially With Nitrogen Loss in the Humboldt Upwelling System off Peru. Global Biogeochemical Cycles, 37(2), https://doi.org/10.1029/2022GB007578

Related to:

Holmes, Robert M; Aminot, A; Kerouel, Roger; Hooker, Bethanie A; Peterson, Bruce J (1999): A simple and precise method for measuring ammonium in marine and freshwater ecosystems. Canadian Journal of Fisheries and Aquatic Sciences, 56(10), 1801-1808, https://doi.org/10.1139/f99-128

Murphy, Judith A; Riley, J P (1962): A modified single solution method for the determination of phosphate in natural waters. Analytica Chimica Acta, 27, 31-36, https://doi.org/10.1016/S0003-2670(00)88444-5

Project(s):

Coastal Upwelling System in a Changing Ocean (CUSCO)

Sozial-ökologische Kipppunkte im Humboldt-System (HumboldtTipping)

Funding:

Federal Ministry of Education and Research (BMBF), grant/award no. 01LC1823B : HumboldtTipping Teilprojekt 2: Modellierung von mariner Biogeochemie bis Fisch (End-to-End Modellierung)

Coverage:

Median Latitude: -13.465480 * Median Longitude: -76.978475 * South-bound Latitude: -16.398000 * West-bound Longitude: -80.999800 * North-bound Latitude: -8.499000 * East-bound Longitude: -74.166500

Date/Time Start: 2018-12-27T18:52:00 * Date/Time End: 2019-01-25T22:55:00

Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 2000 m

Event(s):

MSM80_1-1 * Latitude: -8.499583 * Longitude: -80.999983 * Date/Time: 2018-12-27T19:19:00 * Elevation: -6233.3 m * Campaign: (CUSCO-1) * Basis: * Method/Device: (CTD-RO)

MSM80_4-1 * Latitude: -8.499817 * Longitude: -80.499983 * Date/Time: 2018-12-28T12:47:00 * Elevation: -1326.0 m * Campaign: (CUSCO-1) * Basis: * Method/Device: (CTD-RO)

MSM80_7-1 * Latitude: -8.499133 * Longitude: -80.031050 * Date/Time: 2018-12-28T22:15:00 * Elevation: -357.1 m * Campaign: (CUSCO-1) * Basis: * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Kittu, Leila
2	Station label	Station		Kittu, Leila
3	Transect	Transect		Kittu, Leila
4	DATE/TIME	Date/Time		Kittu, Leila		Geocode
5	LATITUDE	Latitude		Kittu, Leila		Geocode
6	LONGITUDE	Longitude		Kittu, Leila		Geocode
7	Pressure, water	Press	dbar	Kittu, Leila
8	DEPTH, water	Depth water	m	Kittu, Leila		Geocode
9	Nitrate	[NO3]-	µmol/l	Kittu, Leila	SEAL Analytical, continuous flow analyser QuAAtro
10	Nitrite	[NO2]-	µmol/l	Kittu, Leila	SEAL Analytical, continuous flow analyser QuAAtro
11	Phosphate	[PO4]3-	µmol/l	Kittu, Leila	Determination of phosphate (Murphy & Riley, 1962)
12	Silicate	Si(OH)4	µmol/l	Kittu, Leila	SEAL Analytical, continuous flow analyser QuAAtro
13	Ammonium	[NH4]+	µmol/l	Kittu, Leila	Fluorometric
14	Nitrogen, total dissolved	TDN	µmol/l	Kittu, Leila	SEAL Analytical, continuous flow analyser QuAAtro
15	Nitrogen, organic, dissolved	DON	µmol/l	Kittu, Leila	Calculated
16	Phosphorus, total dissolved	TDP	µmol/l	Kittu, Leila	SEAL Analytical, continuous flow analyser QuAAtro
17	Phosphorus, organic, dissolved	DOP	µmol/l	Kittu, Leila	Calculated

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

6028 data points

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