SAPPORO, JAPAN

Contacts: Dr Kiyoshi Ochifuji Faculty of Engineering, Hokkaido University Kyta 13 jo, Nishi 8 chome Sapporo 060, Japan Tel : (81) 11 716 2111 Fax : (81) 11 707 9750 E-mail : Server :	Station Location: Sapporo, Japan. Latitude: 43°03' N Longitude: 141°20' E Height above sea level: 40 m. Local Time: GMT+9 Code: JPN3 Type: Research class. Operation: started in April 1991.
Topographic map showing the land within a 5 km radius of the station location

SAPPORO, JAPAN

Site surroundings: With a population of 1.7 million, Sapporo is the fifth largest city in Japan. Within a 5 km radius of the station, 80% of the land is urban and suburban housing and 20% woodland and parkland. Hokkaido Expessway is 3 km from the measurement site.	Climate characteristics: Climate is typical of the climate seen along the sea of Japan. Annual average temperature is 8.2 °C. Average temperature in January is -4.6 °C and in July 20.2 °C. Average annual sunshine duration is 1805 hours. The closest weather station is located 2 km southwest of the station.
Map showing the immediate surroundings of the station

SAPPORO, JAPAN

Sampling Interval: 1 mn. Recording Interval: 1 mn. Illuminances: Global horizontal: EKO ML-010S Diffuse horizontal: EKO ML-010S Direct normal: EKO ML-010SD North vertical: EKO ML-010S East vertical: EKO ML-010S South vertical: EKO ML-010S West vertical: EKO ML-010S Irradiances: Global horizontal: EKO MS-801 Diffuse horizontal: EKO MS-801 Direct normal: EKO MS-52 North vertical: EKO MS-801 East vertical: EKO MS-801 South vertical: EKO MS-801 West vertical: EKO MS-801 Others: Zenith luminance: EKO ML-010SL Sunshine duration: EKO MS-091 Sky luminances: EKO MS-300L Dry bulb temperature: Thermo-couples (T) Shadow band specifications: Diffuse illuminance: radius: 25.0 cm / width: 5.0 cm Diffuse irradiance: radius: 25.0 cm / width: 5.0 cm

Station map Obstruction for the global horizontal illuminance sensor

Comments The vertical sensors are shaded from ground reflected light using black honeycomb material. The sensors are considered to be interfere with snow. All the illuminance and irradiance sensors were calibrated by the manufacturers, EKO instruments Trading Co. in November 1990 and January 1991. The direct illluminance and irradiance sensors were recalibrated in July 1993. The sky scanner (MS-300L) was calibrated by the manufacturers in November 1991. This sensor was calibrated in May 1992.

SAPPORO, JAPAN

View 1 of the station	Comments View of the station looking southeast, including from left to right the sky scanner and the sensors for the diffuse and global illuminance, zenith luminance, sunshine duration, and the diffuse and global irradiance.
View 2 of the station	Comments View of the station looking northwest, including from left to right the sensors for sunshine duration, zenith luminance, direct irradiance and illuminance, south vertical illuminance and irradiance, diffuse illuminance, and the sky scanner.

SAPPORO, JAPAN

Important modifications made to the acquisition system, recording interval modification, time during which the station was not operating...

Date

Comments