Dataset: Western Pacific Precipitation Data

Name: Total organic carbon and total nitrogen content; and nitrogen and oxygen isotope composition of precipitation collected at Qindao, Yantai and Changdao Island, Chine from May 17, 2019 to August 31, 2020.
Published: 2025-01-15
Keywords: precipitation, nitrogen isotope, Western North Pacific, oceans

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Cite This Dataset

North Pacific Ocean

Project:

Collaborative Research: Characterization of Reactive Nitrogen in The North Pacific Atmosphere (North Pacific Atmos)

Principal Investigator:

Meredith Hastings (Brown University)

Co-Principal Investigator:

Hayley N. Schiebel (Suffolk University)

Student:

Alexandra MacFarland (Brown University)

Contact:

Alexandra MacFarland (Brown University)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2025-01-15

Restricted:

Validated:

Current State:

Data not available

Total organic carbon and total nitrogen content; and nitrogen and oxygen isotope composition of precipitation collected at Qindao, Yantai and Changdao Island, Chine from May 17, 2019 to August 31, 2020.

Abstract:

These data include the content of total organic carbon content and total nitrogen, and nitrogen (15N) and oxygen (17O and 18O) isotope composition of precipitation collected at three fixed locations: Qindao (121°28'15" E, 31°37'21" N), Yantai (121°27'40" E, 37°31'20" N), and Changdao Island (120°45'20" E, 38°10'23" N) in China. the rainwater samples collected on the Changdao Island were via an automatic rainwater collector (Model XHARS30C, Jinshui Huayu Scientific Inc. Weifang, China), and all other rainwaters collected in Yantai and Qindao were via stainless buckets from May 17, 2019 to August 31, 2020. Recognizing the deposition from precipitation has the potential to understanding the important role of atmospheric deposition to the nitrogen cycle and biogeochemistry in the ocean. These data assess the contribution of atmospheric deposition to organic carbon and were collected by Dr. Ren Pen (pren@qnlm.ac) at the Ocean University of China.

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Methods & Sampling

Precipitation samples were collected at three fixed points (Qindao (121°28'15" E, 31°37'21" N), Yantai (121°27'40" E, 37°31'20" N), and Changdao Island (120°45'20" E, 38°10'23" N)) in China from May 17, 2019 to August 31, 2020 using an automatic rainwater collector (Model XHARS30C, Jinshui Huayu Scientific Inc. Weifang, China) on Changdao and stainless buckets on Yantai and Qindao.

Data Processing Description

For these samples, we measured the concentrations of dissolved inorganic nitrogen (DIN), total dissolved nitrogen (TDN), dissolved organic nitrogen (DON), dissolved organic carbon (DOC), phosphate, dissolved silica, ammonium, nitrate, and nitrite. Additionally, nitrogen (15N) and oxygen (17O and 18O) isotopes were measured. DIN, TDN, DON, DOC, phosphate, and dissolved silica measurements were conducted at the Center for Isotope Geochemistry and Geochronology (CIGG) at the Qingdao National Laboratory for Marine Science and Technology (QNLM) in Qingdao, China. Ammonium, nitrate, and nitrite concentrations, and isotope measurements were conducted at the Department of Earth, Environmental, and Planetary Sciences at Brown University in Providence, RI (USA).

Concentrations of nutrients (DIN, PO43- , DSi) were analyzed using an autoanalyzer (Quaatro plus system). DIN concentration was the sum of NO3- , NO2- and NH4+. DON was the difference between TDN and DIN. Duplicate measurements were done for some samples.

The concentration of ammonium, nitrate, and nitrite were determined colorimetrically (indophenol blue) using a discrete UV–Vis analyzer (Westco Smartchem 200). U.S. EPA Compliant Methods 350.1 (O’Dell, 1993), 353.2 (Revision 2.0), and 354.1 were followed for ammonium, nitrate, and nitrite, respectively. Standard lab protocols were followed, including calibration to standards as well as blanks and in-house quality control measurements.

The denitrifier method (Casciotti et al., 2002; Sigman et al., 2001) was used to complete nitrate (15N /14N) and oxygen (18O /16O) isotope analyses on a continuous flow isotope ratio mass spectrometer. Values were reported in ‰ relative to standards.

Instruments:

Autoanalyzer (Quaatro plus system) – DIN, phosphate, dissolved silica

Discrete UV–Vis analyzer (Westco Smartchem 200): for ammonium, nitrate, and nitrite concentrations.

Continuous Flow Isotope Ratio Mass Spectrometer: for ammonium, nitrate, and oxygen isotope values.

BCO-DMO Processing

* Adjusted parameter names to comply with database requirements
* Added sampling latitude and longitude to dataset
* Converted date to ISO notation (Y-m-d)

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1851318
NSF Division of Ocean Sciences	OCE-1851343

Deployments

None available yet

Instruments

Continuous Flow Analyzer

Supplied Name: Quaatro plus system

Supplied Description:

Autoanalyzer (Quaatro plus system) – DIN, phosphate, dissolved silica

Instrument Type

Generic Name: Continuous Flow Analyzer

Acronym: CFA

Generic Description:

A sample is injected into a flowing carrier solution passing rapidly through small-bore tubing.

Isotope-ratio Mass Spectrometer

Supplied Name:

Supplied Description:

Continuous Flow Isotope Ratio Mass Spectrometer: for ammonium, nitrate, and oxygen isotope values.

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Spectrophotometer

Supplied Name: Westco Smartchem 200

Supplied Description:

Discrete UV–Vis analyzer (Westco Smartchem 200): for ammonium, nitrate, and nitrite concentrations.

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Parameters

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Dataset: Western Pacific Precipitation Data