Citation:

PANGAEA.947116

Name: Methane concentration and oxidation rate in the Yangtze River Estuary (July 2021) and East China Sea (April 2021)
Published: 2022-08-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: methane concentrations; Methane flux; methane oxidation

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Published: 2022-08-16 • DOI registered: 2022-09-27

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Abstract:

We investigated the dynamic of methane (CH4) concentration, saturation, and sea-to-air flux in the typical near-shore (Yangtze River Estuary) and outer shelf (East China Sea) areas. We further determined the dynamic of aerobic methanotrophic activity employing in vitro radiotracer assay. The data presented here are beneficial to advancing our understanding for the methane cycle in the estuarine and shelf regions. Water samples were collected from the Yangtze River Estuary and East China Sea aboard the R/V “Runjiang 1 and Zheyuke 2”, “Xiangyang hong 18” during three expeditions in July and March-April 2021. Methane samples were collected directly using a 12 L Niskin bottle deployed on a Seabird 911 CTD rosette system, from which seawater temperature, salinity and depth were recorded. Methane samples in seawater were measured using a cryogenic purge-and-trap setup connected to an Agilent GC-8890 gas chromatograph with a flame ionization detector according to the detailed methods given in (Zhang et al., 2004). We used a radiotracer approach and added 3H-CH4 to seawater samples to determine the methan oxidation (MOx) rate by quantifying 3H-CH4 oxidation to 3H-H2O (Rogener et al., 2020).

Keyword(s):

methane concentrations; Methane flux; methane oxidation

Supplement to:

Mao, Shi-Hai; Zhang, Hong-Hai; Zhuang, Guang-Chao; Li, Xiao-Jun; Liu, Qiao; Zhou, Zhen; Wang, Wei-Lei; Li, Chun-Yang; Lu, Ke-Yu; Liu, Xi-Ting; Montgomery, Andrew; Joye, Samantha B; Zhang, Yu-Zhong; Yang, Gui-Peng (2022): Aerobic oxidation of methane significantly reduces global diffusive methane emissions from shallow marine waters. Nature Communications, 13, 7309, https://doi.org/10.1038/s41467-022-35082-y

Related to:

Mao, Shi-Hai; Zhang, Hong-Hai; Zhuang, Guang-Chao; Li, Xiao-Jun; Liu, Qiao; Zhou, Zhen (2022): Methane production in the Yangtze River Estuary and East China Sea in 2019/2020 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947297

Rogener, Mary Katherine; Sipler, Rachel E; Hunter, Kimberley S; Bronk, Deborah A; Joye, Samantha B (2020): Pelagic methane oxidation in the northern Chukchi Sea. Limnology and Oceanography, 65(1), 96-110, https://doi.org/10.1002/lno.11254

Zhang, G L; Zhang, J; Kang, Y B; Liu, S M (2004): Distributions and fluxes of methane in the East China Sea and the Yellow Sea in spring. Journal of Geophysical Research, 109(C7), C07011, https://doi.org/10.1029/2004JC002268

Funding:

Fundamental Research Funds for the Central Universities, grant/award no. 202041008

Fundamental Research Funds for the Central Universities, grant/award no. 202172002

National Natural Science Foundation of China (NSFC), grant/award no. 42076031

Taishan Scholar Foundation of Shandong Province, grant/award no. tsqn201909057

Coverage:

Median Latitude: 30.006161 * Median Longitude: 122.937312 * South-bound Latitude: 26.450000 * West-bound Longitude: 120.960000 * North-bound Latitude: 32.391000 * East-bound Longitude: 124.778300

Date/Time Start: 2021-04-01T06:31:00 * Date/Time End: 2021-07-18T14:41:00

Minimum DEPTH, water: 1.40 m * Maximum DEPTH, water: 4.60 m

Event(s):

RJ-1_2021_A1-1 (A1-1) * Latitude: 31.985400 * Longitude: 122.243200 * Date/Time: 2021-07-15T09:39:00 * Elevation: -14.0 m * Location: Yangtze River Estuary * Campaign: * Basis: Runjiang 1 * Method/Device: (CTD-RO)

RJ-1_2021_A1-3 (A1-3) * Latitude: 32.120500 * Longitude: 122.734000 * Date/Time: 2021-07-15T13:15:00 * Elevation: -31.0 m * Location: Yangtze River Estuary * Campaign: * Basis: Runjiang 1 * Method/Device: (CTD-RO)

RJ-1_2021_A1-5 (A1-5) * Latitude: 32.224700 * Longitude: 123.241100 * Date/Time: 2021-07-15T16:35:00 * Elevation: -35.0 m * Location: Yangtze River Estuary * Campaign: * Basis: Runjiang 1 * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Mao, Shi-Hai
2	Station label	Station		Mao, Shi-Hai
3	Vessel	Vessel		Mao, Shi-Hai
4	DATE/TIME	Date/Time		Mao, Shi-Hai		Geocode
5	LONGITUDE	Longitude		Mao, Shi-Hai		Geocode
6	LATITUDE	Latitude		Mao, Shi-Hai		Geocode
7	Depth, bathymetric	Bathy depth	m	Mao, Shi-Hai
8	DEPTH, water	Depth water	m	Mao, Shi-Hai	CTD, Sea-Bird, SBE 911	Geocode
9	Temperature, water	Temp	°C	Mao, Shi-Hai	CTD, Sea-Bird, SBE 911
10	Salinity	Sal		Mao, Shi-Hai	CTD, Sea-Bird, SBE 911
11	Methane	CH4	nmol/l	Mao, Shi-Hai	Agilent GC-8890 gas chromatograph with a flame ionization detector
12	Methane, oxidation rate	MOX	nmol/l/day	Mao, Shi-Hai	Radiotracer
13	Area/locality	Area		Mao, Shi-Hai

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

585 data points

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Datasets with similar metadata

Mao, S-H; Zhang, H-H; Zhuang, G-C et al. (2022): Methane production in the Yangtze River Estuary and East China Sea in 2019/2020. https://doi.org/10.1594/PANGAEA.947297
Liu, Q; Du, G; Li, X et al. (2023): Methane concentrations and aerobic methane oxidation rates in the East China Sea and Yellow Sea. https://doi.org/10.1594/PANGAEA.959589
Li, X-J; Zhuang, G; Zhang, H-H (in review): Methane oxidation rate and constant k in the South China Sea. https://doi.pangaea.de/10.1594/PANGAEA.969267