Citation:

PANGAEA.995208 (dataset in review)

Name: Soil Physicochemical Properties and DBC/DOC Concentrations from a 2020–2021 Forest Sampling Campaign in China
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Dissolved Black Carbon; Dissolved Organic Carbon; soil–river–ocean continuum

ShareShow Map Google Earth

Abstract:

This dataset presents experimental results from a large-scale field soil sampling campaign conducted across China between 2020 and 2021. The template includes the longitude and latitude information of each sampling site, along with experimental data on organic carbon content, which comprises total soil organic carbon (SOC, in g-C·100g⁻¹), water-extractable soil organic matter (DOC, in mg-C·g⁻¹), and water-extractable soil black carbon (DBC, in µg-C·g⁻¹). Additionally, the dataset provides the chemical composition of organic matter based on ¹³C-NMR analysis, including the relative abundances of alkyl C (chemical shift: 0–45 ppm, in %), N-alkyl or methoxy C (45–60 ppm), O-alkyl C (60–95 ppm), di-O-alkyl C (95–110 ppm), aromatic C (110–145 ppm), O-aromatic C (145–165 ppm), and carboxyl and carbonyl C (165–210 ppm). Furthermore, several physicochemical parameters were measured, including soil pH, soil clay content, and the relative abundance of soil mineral elemental content.

Keyword(s):

Dissolved Black Carbon; Dissolved Organic Carbon; soil–river–ocean continuum

Supplement to:

Wang, Yinghui; Wang, Junjian; Zhang, Qiang; Zhang, Peng; Wang, Mengke; Simon, Heike; Niggemann, Jutta; Dittmar, Thorsten (submitted): A climatic paradox in dissolved black carbon release from soils and export by rivers. Proceedings of the National Academy of Sciences

Funding:

National Natural Science Foundation of China (NSFC), grant/award no. 42192513

National Natural Science Foundation of China (NSFC), grant/award no. 42403067

Coverage:

Median Latitude: 30.491698 * Median Longitude: 109.701887 * South-bound Latitude: 21.740000 * West-bound Longitude: 85.130000 * North-bound Latitude: 42.070000 * East-bound Longitude: 125.940000

Date/Time Start: 2020-10-02T00:00:00 * Date/Time End: 2021-05-18T00:00:00

Minimum DEPTH, soil: 0.025 m * Maximum DEPTH, soil: 0.075 m

Event(s):

Forest_site_F-BJ-2 * Latitude: 40.030000 * Longitude: 116.260000 * Date/Time: 2021-05-10T00:00:00 * Method/Device: Soil corer

Forest_site_F-FJ-1 * Latitude: 25.500000 * Longitude: 118.230000 * Date/Time: 2020-10-20T00:00:00 * Method/Device: Soil corer

Forest_site_F-FJ-2 * Latitude: 24.650000 * Longitude: 117.970000 * Date/Time: 2020-12-10T00:00:00 * Method/Device: Soil corer

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Wang, Yinghui
2	Latitude of event	Latitude		Wang, Yinghui
3	Longitude of event	Longitude		Wang, Yinghui
4	Date/Time of event	Date/Time		Wang, Yinghui
5	Sample code/label	Sample label		Wang, Yinghui
6	Temperature, air, annual mean	MAAT	°C	Wang, Yinghui	Derived from National Tibetan Plateau Data Center	Three-year average data for 2018-2020.
7	Precipitation, annual mean	MAP	mm	Wang, Yinghui	Derived from National Tibetan Plateau Data Center	Three-year average data for 2018-2020.
8	Fire frequency	Fire	#		Derived from Fire Information for Resource Management System (FIRMS), NASA	Summarised data for over the past 10 years from 2011-2020.
9	Depth, soil, minimum	Depth soil min	m	Wang, Yinghui		Ring cutter sampling.
10	Depth, soil, maximum	Depth soil max	m	Wang, Yinghui		Ring cutter sampling.
11	DEPTH, soil	Depth soil	m	Wang, Yinghui		Geocode – Ring cutter sampling.
12	Carbon, organic, soil	SOC	g/kg	Wang, Yinghui	Macro elemental analyzer, SciSPX, Vario MACRO Cube	Elemental analyzer after acid digestion of inorganic carbon.
13	Carbon, organic, dissolved	DOC	mg/kg	Wang, Yinghui	see comment	Extract DOC from soils using ultra-pure water at a 1:10 soil-to-water ratio, filtrates were analyized withTOC-L CSH/CSN analyzer.
14	Black carbon, dissolved	DBC	µg/g	Wang, Yinghui	Analysed via benzene polycarboxylic acids	Benzene polycarboxylic acid method. (Ultra-high performance liquid chromatography, Waters, ACQUITY ).
15	Alkyl C	Alkyl C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 0–45 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
16	N-alkyl C	N-alkyl C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 45–60 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
17	O-alkyl C	O-alkyl C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 60–95 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
18	Di-O-alkyl C	Di-O-alkyl C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 95-110 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
19	Aromatic C	Aromatic C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 110-145 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
20	O-aromatic C	O-aromatic C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 145-165 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
21	Carbonyl C	Carbonyl C	%	Wang, Yinghui	Nuclear magnetic resonance spectrometer (NMR), Bruker, Avance III HD 400	Chemical shift: 165-210 ppm. Concentrated carbon by removing paramagnetic matter using hydrofluoric acid and analysied by solid-state 13C-NMR.
22	pH	pH		Wang, Yinghui	Measured in 2.5:1 slurry in water	Measured in 2.5:1 slurry in water using a HACH HQ440D benchtop meter with an Intellical™ PHC201 pH probe (Multi-Parameter Meter, Hach, HQ440D).
23	Clay	Clay	%	Wang, Yinghui	Grain size, Mastersizer 2000, Malvern Instrument Inc.	< 4 µm
24	Aluminium oxide	Al2O3	%	Wang, Yinghui	X-ray diffractometer, Bruker, S8 Tiger
25	Iron oxide, Fe2O3	Fe2O3	%	Wang, Yinghui	X-ray diffractometer, Bruker, S8 Tiger
26	Alkaline earth elements	AEE	%	Wang, Yinghui	X-ray diffractometer, Bruker, S8 Tiger	Alkaline-earth Elementes: MgO+CaO+Na2O+K2O

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2223 data points

Download Data (login required; moratorium until 2026-12-01)

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)