CEOP_AP Tsukuba Reference Site NIAES-MASE Station

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Regional Hydroclimate Project:

CEOP_AP

Reference Site Name:

Tsukuba Station Name:

NIAES-MASE (National Institute for Agro-Environmental Sciences) Other Stations at Reference Site:

Reference Site Representative:

Name:

Affiliation:

Associate Prof., University of Tsukuba

Address:

Tenno-dai, 1-1-1, Tsukuba, Ibaraki 305-8572, JAPAN

E-mail:

Telephone:

Fax:

Data Management Contact:

Name:

Affiliation:

Director, Agro-Meteorology Division, National Institute for Agro-Environmental Sciences

Address:

Kannondai 3-1-3, Tsukuba, Ibaraki 305-8604, JAPAN

E-mail:

Telephone:

Fax:

Associated Web Sites:

Station Location, Maps and Google Earth Files:

NIAES-MASE Local Station Map (click for full resolution):

Tsukuba Local Region Map (click for full resolution):

Tsukuba Regional Station Map (click for full resolution):

Google Earth:

Google Earth .kmz file of CEOP_AP Tsukuba Reference Site stations

Station Description:

General Description:

To promote science and technology and to become the center of advanced research and higher education based on its national institutes and university, a new science city (Tsukuba Science City) was established approximately 60 km northeast of Tokyo, in the 1970s (http://www.info-tsukuba.org/). The CEOP Tsukuba Reference Site (CTRS) project started in 2007 with the support of grants-in-aid for scientific research from the Japan Society for the Promotion of Science (CEOP Tsukuba DB, No. 198052). The aim of this project is the archiving of the hydrometeorological data observed by the multiple institutes and university in Tsukuba Science City, and to link them to the domestic and international science community with a standard format within the framework of the CEOP project (http://www.ceop.net/). The following institutes and university are members of the CTRS project at present : Meteorological Research Institute (MRI), Terrestrial Environment Research Center (TERC) and Mt. Tsukuba Station (MtTSUKUBA) of the University of Tsukuba (UT). National Research Institute for Earth Science and Disaster Prevention (NIED), National Institute for Agro-Environmental Sciences (NIAES), and National Institute for Environmental Studies (NIES).

Station Description:

The Mase paddy flux site was established in 1999 to monitor greenhouse gas exchange between paddy fields and the atmosphere. Since then, the site has become one of the key study sites of AsiaFlux.

Station Operator:

National Institute for Agro-Environmental Sciences

Vegetation and Land Use:

Tsukuba Reference Site is situated on the Joso Plateau (20-30 m a.s.l.) consisting northeastern parts of Kanto plain. Land cover of the site is mainly consisted of two parts, one is the urbanized zone stretching north-south directions used for public facilities, residential areas, and commercial and business areas (so-called Tsukuba Science city), and the other parts are rural areas used for paddy field, dry field and orchard.

In August, 2005, the Tsukuba Express Railway started its business, and Tsukuba Science city is rapidly urbanizing. Two rivers are running in the north-east and south-west of the site, named Sakura-gawa and Kokai-gawa, and the paddy fields are mainly distributing along those rivers. Mt. Tsukuba (876 m a.s.l.) locates about 7 km north of the city center, mostly forested by beech, tall evergreen oak, and Japanese red pine tree. In the calm winter days, development of nighttime inversion layer over the Kanto plain causes thermal belt along the mountain slope, and it is utilized for local habitat and fruits plantation.Therefore, CEOP-Tsukuba reference site covers various of land-use with faster growing populated city representing land cover in the Kanto plain, central Japan.

Dominant land cover at the measurement location: agricultural fields (rice paddy fields)

Canopy height: changable with season from zero to 1.1 m

Land cover within 50 m of site: agricultural fields (rice paddy fields)

Land cover within 500 m of site: agricultural fields (rice paddy fields) and water (a river)

Land cover within 12 km of site: a mixture of agricultural fields (rice paddy and upland fields) and scattered urbanized area

Seasonal land cover changes: the rice paddy fields are mostly flooded in the cultivation period from late April to mid-September except for mid-season and pre-harvest drainage periods, while drained bare soil is exposed to air most of the fallow period.

Major changes in land cover at site during CEOP data period: No information.

Slope at the site: flat

Other notes: No information.

Soil Type and Characterization:

Surface soil type: CL (0-40 cm)

Soil type in deeper layers: LiC (40-150 cm)

Surface soil porosity: (Feb. 2000): 8% (0-16cm)

Soil porosity in deeper layers: (Feb. 2000): no data (16-19 cm), 47.6% (19-42 cm), 69.1% (42-70 cm), 64.5% (70-108 cm), 49.0% (108-120 cm), 70.8% (120-130+ cm)

Soil infiltration rate: No information.

Bulk Dry Density: (g/cm3; March 2007): 0.82 (0-16 cm), no data (16-20 cm), 1.24 (20-40 cm), 1.04 (40-58 cm), 1.02 (58-95 cm), 0.51 (95-127 cm), 0.36 (127-150 cm)

Saturated Hydraulic Conductivity: (cm/s; March 2007): 2.50E-02 (0-16 cm), no data (16-20 cm), 3.52E-05 (20-40 cm), 4.74E-04 (40-58 cm), 7.28E-04 (58-95 cm), 2.44E-03 (95-127 cm), 2.65E-05 (127-150 cm)

The Soil Reference Group(s) (from World Reference Base for Soil Resources): Fluvisols.

Climate:

No information.

CEOP Parameters Measured and Instrumentation:

SURFACE METEOROLOGY AND RADIATION INSTRUMENTATION AND DESCRIPTION:

Station pressure measured at 1.0 m height; no instrumentation information
Air Temperature measured at 3.75 m height; no instrumentation information
Dew point - presumably derived at 3.75 m height
Relative humidity measured at 3.75 m height; no instrumentation information
Specific humidity presumably derived at 3.75 m height
Wind speed measured at 3.75 m height; no instrumentation information
Wind direction measured at 4 m height; no instrumentation information
U wind component presumably derived at 3.75-4 m height
V wind component presumably derived at 3.75-4 m height
Precipitation - measured at 1.7 m height; no instrumentation information
Snow depth - Not measured.
Incoming shortwave radiation - measured at 2.5 m height; no instrumentation information
Outgoing shortwave radiation - measured at 2.5 m height; no instrumentation information
Incoming longwave radiation - measured at 2.5 m height; no instrumentation information
Outgoing longwave radiation - measured at 2.5 m height; no instrumentation information
Net radiation measured at 2.5 m height ; no instrumentation information
Skin temperature - measured; no instrumentation information
Incoming Photosynthetically Active Radiation (PAR) - measured at 2.5 m height; no instrumentation information
Outgoing Photosynthetically Active Radiation (PAR) - measured at 2.5 m height; no instrumentation information

METEOROLOGICAL TOWER INSTRUMENTATION AND DESCRIPTION:

No tower data available.

FLUX INSTRUMENTATION AND DESCRIPTION:

Sensible Heat Flux measured at 3.15 m height; no instrumentation information
Latent Heat Flux measured at 3.15 m height; no instrumentation information
CO2 Flux measured at 3.15 m height; no instrumentation information
Soil Heat Flux measured at 0.002 m depth; no instrumentation information

SOIL INSTRUMENTATION AND DESCRIPTION:

Soil temperature measured at 0.01, 0.05, 0.10, 0.20 and 0.40 m depth; no instrumentation information
Soil moisture measured at 0.025, 0.05, 0.10, 0.20 and 0.30 m depth; no instrumentation information

RADIOSONDE INSTRUMENTATION AND DESCRIPTION:

No radiosonde measurements available.

OTHER INSTRUMENTATION AND DESCRIPTION:

Friction velocity at 3.0 m height
obkhov length at 3.0 m height
Plant height
Leaf area index
Dry matter weight of rice

Site References

Tsukuba Web Site

Literature:

Ueno et al. (2008); Establishment of CEOP Tsukuba Reference site, Tsukuba Geoenvironmental Sciences, vol. 4, 17-20.

Presentations:

September 2007 - Bali, Indonesia

Tsuskuba

March 2007 - Washington, DC, USA

Tsukuba Poster

Data Sets and Documentation: