IZM: Ooizumi Urban Park

General site detail (Updated 10 April 2023)
 Site name
 Ooizumi Urban Park
 AsiaFlux site code
 Location Sakai, Osaka, Japan
 Position 34°33'48.49"N, 135°32'0.54"E
 Elevation 22 m (Google Earth)
 Slope 0.11 degree, North: 0.23 degree
 Terrain type
 Flat plain field
 Area 101.5 ha
 Fetch 910 m for west and southwest, and 1100 m for
 Climate Warm temperate (Cfa)
 Mean annual air temperature
 Mean annual precipitation
 1206.9 mm 
 Vegetation type
 Urban park and residential area including mixed
 forest, grass, and farmland
 Dominant species (Overstory)
 Dominant species (Understory)
 Canopy height
 13.1 ± 2.9 m
 Age -
 LAI 3.2 ~ 5.7
 Soil type

Eddy Covariance method (CO2)
 System Open-path eddy covariance
 Wind speed
 Sonic anemometer (CSAT3, Campbell Scientific Inc.)
 Air temperature
 Sonic anemometer (CSAT3, Campbell Scientific Inc.)
 Water vapor
 Open-path CO2/H2O analyzer (EC150, Campbell Scientific
 CO2 Open-path CO2/H2O analyzer (EC150, Campbell Scientific
 Measurement height
 30 m
 Sampling frequency
 10 Hz
 Averaging time
 30 minutes
 Data logger
 CR1000 (Campbell Scientific Inc.)
 Data storage
 CF Card
 Original data
 Raw data

 Observation items
  Levels/ Depth
 Global solar radiation(incoming)
 30 m Quantum sensor (ML-01, EKO)
 Global solar 
radiation (outgoing)
 30 m
 Quantum sensor (ML-01, EKO)
 Long-wave radiation(outgoing) 
 Long-wave radiation(outgoing) 
 Net radiation
 PPFD (incoming)
 PPFD (outgoing)
 Direct / diffuse radiation
 Direct / diffuse PPFD
 Air temperature
 30 m Platinum resistance thermometer and capacitive
 (HMP50, Vaisala)
 Humidity 30 m Platinum resistance thermometer and capacitive
 (HMP50, Vaisala)
 Soil temperature
 Soil heat flux
 Soil water 
 Wind speed
 30 m Sonic anemometer (CSAT3, Campbell Scientific
 Wind direction
 30 m Sonic anemometer (CSAT3, Campbell Scientific
 30 m
 Barometer (PTB110, Vaisala)
 Precipitation - 
 30 m Open-path CO2/H2O analyzer (EC150, Campbell
 Scientific Inc.)
 H2O  concentration
 30 m IRGA (EC150, Campbell Scientific Inc.,)
 Surface  temperature 30 m Radiation thermometer (IT-450N, Horiba)

Observation Period and Data Availability
 Measurement Period
 from January 2015 to January 2016
 Measurement Frequency
 Data Availability

 Masahito Ueyama (mueyama[at]omu.ac.jp)
 Osaka Metropolitan University, Graduate School of Agriculture
 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
 Tel: +81-72-254-9432

 Wake-up Tower, Electric Power (AC)

Research Fond
 The Sumitomo Foundation (143205)

 Ooizumi Urban Park (only Japanese)


 Ueyama, M., Taguchi, A., Takano, T,. 2021. Water vapor emission from

   urban landscapes in Sakai, Japan, Journal of Hydrology, 598, 126384.

 Ueyama, M., Ando, T., 2020. Cooling effect of an urban park by enhanced heat transport efficiency. Journal of Agricultural Meteorology, 76, 148-153.

 Ueyama, M., and And, T., 2016. Diurnal, weekly, seasonal and spatial variabilities in carbon dioxide flux in different urban landscapes in Sakai. Atmospheric Chemistry and Physics, 16, 14727-14740.