OM1

OM1: B11 building in Osaka Metropolitan University

General site details

Site name	B11 building in Osaka Metropolitan University
AsiaFlux site code	OM1
Location	Sakai, Osaka, Japan
Position	34°32'49.84"N, 135°30'10.30"E
Elevation	27 m above sea level
Slope	0 degree
Terrain type	Flat
Area	-
Fetch	150 m
Climate	Warm temperature (Cfa)
Mean annual air temperature	15.6 ℃
Mean annual precipitation	1206.9 mm
Vegetation type	Roadside trees (Deciduous broad leaf trees)
Dominant Species (Overstory)	-
Dominant Species (Understory)	-
Canopy height	13.1 ± 2.9 m
Age	-
LAI	-
Soil type	Concrete and Asphalt

Observation

Eddy Covariance method (CO₂)

System	Open-path eddy covariance
Wind speed	Sonic anemometer (Windmaster, Gill), until April, 2021 Sonic anemometer (CSAT3, Campbell Scientific Inc.), present
Air temperature	Sonic anemometer (Windmaster, Gill), until April, 2021 Sonic anemometer (CSAT3, Campbell Scientific Inc.), present
Water vapor	Open-path CO2/H2O analyzer (LI-7500, Li-Cor), until April,2021 Open-path CO2/H2O analyzer (EC150, Campbell Scientific Inc.), present
CO₂	Open-path CO2/H2O analyzer (LI-7500, Li-Cor), until April,2021 Open-path CO2/H2O analyzer (EC150, Campbell Scientific Inc.), present
Measurement height	16.2 m
Sampling frequency	10 Hz
Averaging time	30 minutes
Data logger	CR1000X (Campbell Scientific Inc.)
Data storage	microSD card
Original data	Raw data

Meteorology

Observation items	Levels/Depth	Instrument
Global solar radiation (incoming)	0.9 m above roof	4 component net radiometer (MR-40, Eko, Japan) Quantum sensor (ML-01, EKO)
Global solar radiation (outgoing)	0.9 m above roof	4 component net radiometer (MR-40, Eko, Japan) Quantum sensor (ML-01, EKO)
Long-wave radiation (incoming)	0.9 m above roof	4 component net radiometer (MR-40, Eko, Japan)
Long-wave radiation (outgoing)	0.9 m above roof	4 component net radiometer (MR-40, Eko, Japan)
Net radiation	0.9 m above roof	Net Radiometer (NR LITE2, Kipp&Zonen)
PPFD (incoming)	-	-
PPFD (outgoing)	-	-
Direct/diffuse radiation	-	-
Direct/diffuse PPFD	-	-
Air temperature	0.8 m above roof	Platinum resistance thermometer and capacitive (HMP60, Vaisala)
Humidity	0.8 m above roof	Platinum resistance thermometer and capacitive (HMP60, Vaisala)
Soil temperature	-	-
Soil heat flux	0 cm above roof 0 cm above roof	Heat flux plate (TEC-3105, Kyohritsu,Japan) Heat flux plate (HFP01-10, Hukseflux)
Soil water content	0~30 cm in rooftop gardening	TDR sensor (CS616,Campbell Scientific Inc.)
Wind speed	1) 16.2 m a.g.l <br />2) 16.2 m a.g.l <br />3) 16 m a	1) Sonic anemometer (Windmaster, Gill), until April, 2021 <br />2) Sonic anemometer (CSAT3, Campbell Scientific Inc.), present <br />3) Vane anemometer (5103, R.M. Young)
Wind direction	1) 16.2 m a.g.l <br />2) 16.2 m a.g.l <br />3) 16 m a	1) Sonic anemometer (Windmaster, Gill), until April, 2021 <br />2) Sonic anemometer (CSAT3, Campbell Scientific Inc.), present <br />3) Vane anemometer (5103, R.M. Young)
Barometric pressure	16.2 m a.g.l	Barometer (PTB110, Vaisala) Barometer (LI-7700, Li-Cor)
Precipitation	0 cm above roof	Tipping-bucket raingauge (WBO015, Nakase, Japan)
CO₂ concentration	16.2 m a.g.l	Open-path CO2/H2O analyzer (LI-7500, Li-Cor), until April, 2021 Open-path CO2/H2O analyzer (EC150, Campbell Scientific Inc.), present
CO₂ concentration	22.5 m a.g.l	Closed-path CO2/H2O analyzer (LI-850, Li-Cor)
Surface temperature	18.0 m a.g.l	Radiation thermometer (IT-405N, Horiba)
Roof temperature	0 cm above roof	Thermocouple
CH4 concentration	16.2 m a.g.l	Open-path CH4 analyzer (LI-7700, Li-Cor)
Ultraviolet radiation	0.9 m above roof	Quantum sensor (CAP-SU-200-SS,Apogee)
CO concentration	16.2 m a.g.l	Closed-path CO analyzer (Los Gatos Research)

Fluxes of non-CO2 gases

Gas	CH<sub>4</sub>
Method	Eddy covariance method
Measurement height	16.2 m
Data logger	CR1000X (Campbell Scientific Inc.)
Data storage	microSD Card

Other

Phenology

Phenological Camera (Garden watch camera)

Observation Period and Data Availability

Measurement Period	October 2014 to present
Measurement Frequency	Continuous
Data Availability	-

Contact

Masahito Ueyama (mueyama[at]omu.ac.jp)
Osaka Metropolitan University
Graduate School of Agriculture
1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, JAPAN
Phone: +81-72-254-9432
https://www.omu.ac.jp/agri/ecolmet/ueyama/research02/index.html

Infrastructure

Pole tower, Electrical power (AC)

Research Fund

JSPS KAKENHI (18H03362)

Calibration Information

Open-path analyzer were calibrated approximately once a year with standard CO2 gases and a dew point generator (LI610, LI-COR)

Publication

Ueyama, M., Taguchi, A., Takano, T., 2021. Water vapor emissions from urban landscapes in Sakai, Japan. Journal of Hydrology, 598, 126384.

Takano, T., Ueyama, M., 2021. Spatial variations in daytime methane and carbon dioxide emissions in two urban landscapes, Sakai, Japan. Urban Climate, 36, 100798.