Data Set Citation:
When using this data, please cite the data package:
Shibata H.
Dissolved and particulate organic carbon (DOC and POC) in river water, soil water and throughfall (1997-2000)
JaLTER-Tomakomai.192.1 (https://db.cger.nies.go.jp/JaLTER/metacat/metacat/JaLTER-Tomakomai.192.1/jalter-en)
General Information:
Title:Dissolved and particulate organic carbon (DOC and POC) in river water, soil water and throughfall (1997-2000)
Identifier:JaLTER-Tomakomai.192.1
Abstract:
River discgarge, concentrations of dissolved organic and inorganic carbon (DOC, DIC) and particulate organic carbon (POC) in river water, DOC and DIC in soil water and throughfall were observed in Horonai river watershed, Tomakomai Experimantal Forest, Hokkaido University during 1997-2000. They were conducted as a project of the IGBP (International Geosphere and Biospgere programme) - GCTE (Global Change of Terrestrial Ecosystem) - TEMA (Global Change Impacts on Terrestrial Ecosystems in Monsoon Asia). See further details in the following papers. Shibata, H., H., Mitsuhashi, Y. Miyake and S. Nakano (2001) Dissolved and particulate carbon dynamics in a cool-temperate forested basin in northern Japan. Hydrological Processes 15(10): 1817-1828. DOI: 10.1002/hyp.241 Shibata, H., Hiura, T., Tanaka, Y., Takagi, K. and Koike, T. (2005) Carbon cycling and budget in a forested basin of southwestern Hokkaido, northern Japan. Ecological Research 20(3): 325-331, DOI: 10.1007/s11284-005-0048-7 Kohyama T, Canadell J, Ojima DS, Pitelka LF (2005) Forest ecosystems and environments: scaling up from shoot module to watershed. Ecological Research 20(3): 241-241, DOI: https://doi.org/10.1007/s11284-005-0040-2
Keywords:
  • Carbon cycle
  • Biogeochemistry
  • Stream water
  • River water
  • Dissolved organic carbon
  • Particulate organic carbon
  • DOC
  • POC
  • Particulate organic matter (POM)
  • CPOM
  • FPOM
  • Hydrology
  • Water quality
  • Watershed
  • IGBP
  • GCTE
  • TEMA
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:Particulate organic carbon and nitrogen concentration (POC and PON) in FPOM (< 0.25 mm fractions) in riverwater at the outlet of the watershed, 1998-2000 ( View Metadata | Download File download)
Data Table:Particulate organic carbon and nitrogen concentration (POC and PON) in FPOM (< 0.25 mm fractions) in riverwater at the outlet of the watershed, 2000-2001 ( View Metadata | Download File download)
Data Table:Particulate organic carbon and nitrogen concentration (POC and PON) in riverwater at the outlet of the watershed, 1997-1999 ( View Metadata | Download File download)
Data Table:Particulate organic carbon and nitrogen concentration (POC and PON) in POM (> 0.25 mm fractions) in riverwater at the outlet of the watershed, 1999-2000 ( View Metadata | Download File download)
Data Table:Particulate organic carbon and nitrogen concentration (POC and PON) in POM (> 0.25 mm fractions) in riverwater at the outlet of the watershed, 2000-2001 ( View Metadata | Download File download)
Data Table:DOC and DIC concentrations in river water during 1998-2001, Horonai river watershed ( View Metadata | Download File download)
Data Table:River water discharge (daily mean) at the outlet and spring of the watershed, 1996-2001 ( View Metadata | Download File download)
Data Table:DOC and DIC in throughfall and soil water ( View Metadata | Download File download)

Involved Parties

Data Set Owners:
Individual: Hideaki Shibata
Organization:Hokkaido University
Position:Professor
Email Address:
shiba@fsc.hokudai.ac.jp
Data Set Contacts:
Individual: Hideaki Shibata
Organization:Hokkaido University
Position:Professor
Email Address:
shiba@fsc.hokudai.ac.jp
Associated Parties:
Organization:Tomakomai Experimental Forest

Data Set Characteristics

Geographic Region:
Geographic Description:Outlet of the observed watershed
Bounding Coordinates:
West:  141.590801  degrees
East:  141.590801  degrees
North:  42.680276  degrees
South:  42.680276  degrees
Mimimum Altitude:5.0  meter
Maximum Altitude:90.0  meter
Time Period:
Begin:
1996-10-05
End:
2000-04-26

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:

Study site

This study was conducted in the Horonai river watershed in the Tomakomai Experimental Forest of Hokkaido University, located in southwestern Hokkaido, northern Japan (42.6802°N, 141.5908°E). The Horonai river is a first-order stream with a basin area of 9.4 km2. The mean annual precipitation is approximately 1,200 mm and the mean annual temperature is 7.1°C. The vegetation in the basin is cool-temperate forest, mainly dominated by secondary deciduous forests that colonized the area after a typhoon in 1954. Approximately 50 tree species co-exist, including Quercus mongolica var. crispula, Acer mono, Acer palmatum ssp. matsumurae, and Magnolia hyporeuca. The predominant soil type is volcanic Regosols (Andic Udipsamments). The parent material of the soil is clastic pumice and sand that was deposited by eruptions of Mt. Tarumae in 1667 and 1739.
Citation:  
Title:Dissolved and particulate carbon dynamics in a cool-temperate forested basin in northern Japan
Author(s):
Individual: Hideaki Shibata
Author(s):
Individual: H Mitsuhashi
Author(s):
Individual: Y Miyake
Author(s):
Individual: Shigeru Nakano
Publication Date:2001
ARTICLE:
Journal:Hydrological Processes
Volume:15
Issue:10
Page Range:1817-1828
Step 2:
Description:

General sampling design

This observation focused on the non-gaseous organic and inorganic carbon fluxes in the forest–river ecotone. We observed the dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) at the headwater spring (Basin area: 419 ha), and DOC, DIC and particulate organic carbon (POC) in the outlet of the studied watershed (Basin area: 940 ha). POC was divided into four groups depending on particulate size (>10 mm, 10–1.0 mm, 1.0–0.25 mm and 0.25 mm–0.45 μm). Stream water (DOC, DIC and POC), soil water (DOC and DIC) and throughfall (DOC and DIC) were collected once every 2 weeks, except for the winter period (December–March) when samples were collected monthly. The details are described in Shibata et al. (2001) and Shibata et al. (2005). This observation was conducted as a part of the IGBP-GCTE-TEMA project.
Citation:  
Title:Dissolved and particulate carbon dynamics in a cool-temperate forested basin in northern Japan
Author(s):
Individual: Hideaki Shibata
Author(s):
Individual: H Mitsuhashi
Author(s):
Individual: Y Miyake
Author(s):
Individual: Shigeru Nakano
Publication Date:2001
ARTICLE:
Journal:Hydrological Processes
Volume:15
Issue:10
Page Range:1817-1828
Step 3:
Description:

River water, soil solution and throughfall collection

River water samples were taken at two sites to measure DOC and DIC concentrations: the headwater spring (hereafter termed upper stream water) and the outlet of the basin (hereafter termed lower stream water). Soil water and throughfall were sampled between the spring and the outlet of the studied watershed. Soil gravity water from the mineral soil horizon (hereafter termed deep soil water) was collected in two stainless-steel plate lysimeters (25 x 50 cm2) installed to a depth of 1. 5 m in the 2C horizon. Soil water from the forest floor (hereafter termed surface soil solution) was collected in five vinyl chloride lysimeters (10 x 30 cm2) installed to a depth of 5 cm. All lysimeters were installed in the bank near the river in undisturbed soil. Throughfall was collected in a polyethylene funnel (30 cm diameter) close to the river.
Step 4:
Description:

POC collection and fractionation

The POC concentration in the river water was determined for the outlet of the watershed. Nylon nets were used to collect drift samples for POC analysis. A larger drift net (10 mm mesh) and three smaller nets (0.25 mm mesh) were used to collect drift samples of each fraction. The widths of the square entrances of the larger and smaller nets were 0.75 m and 0.25 m respectively. The filtering time in the stream at each sampling date varied from 5 to 60 min, depending on the amount of drift sample. The sample collected in the larger net (10 mm mesh) was treated as coarse POC (>10 mm). The samples collected by the smaller net (0.25 mm mesh) were divided into two groups (10–1.0 mm and 1.0–0.25 mm) with a stainless-steel filter (1.0 mm mesh) in the laboratory. Stream water (20 L) filtered by a 0.25 mm mesh filter was filtered again by GF/F filter to collect fine POC (< 0.25 mm).
Step 5:
Description:

Chemical analysis

All POC samples and litter fall were dried at 110 °C overnight, weighed and milled before chemical analysis. Carbon concentrations in POC and litter fall were determined by NC analyser (Sumika Analysis Center Co. Ltd., Sumigraph, Model NC-900). All water samples (throughfall, soil solution and stream water) collected for DOC and DIC analysis were filtered with a GF/F filter within 12 h of collection. Water samples were refrigerated at <4 °C until analysis. Both DOC and DIC in water samples were analyzed with a TOC analyzer (Shimazu Co. Ltd., TOC-5000A). DOC concentration was calculated by subtracting the DIC concentration from the total dissolved carbon concentration.
Instrument(s): NC analyser (Sumika Analysis Center Co. Ltd., Sumigraph, Model NC-900) TOC analyzer (Shimazu Co. Ltd., TOC-5000A)
Step 6:
Description:

River discharge

The stream depth at both sites was measured continuously by pressure transducer and recorded on a data logger (Kona System Co. Ltd., KADEC-MIZU). Water discharge was calculated from the equation for the relationship between water depth and water discharge, determined manually at each water sampling time by electromagnetic water velocity meter (Yokogwa Denshikiki Co. Ltd., ES7603). Daily mean river discharge was calculated using hourly observed discharge.
Instrument(s): Pressure transducer with data logger (Kona System Co. Ltd., KADEC-MIZU) Electromagnetic water velocity meter (Yokogwa Denshikiki Co. Ltd., ES7603)

Data Set Usage Rights

Access Control:
Auth System:JaLTER
Order:allowFirst
Allow: [read] public
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File