Outline of Observation
Currently, we observe greenhouse gases including carbon dioxide, methane, and nitrous oxide, as well as air pollutant and meteorological elements in order to estimate the origin of the observed air masses in both monitoring stations. Observation data from both stations are transmitted to the Center for Global Environmental Research in Tsukuba via a dedicated line.
Contents of monitoring
| Subject | Method | H | O | Remarks | |
|---|---|---|---|---|---|
| Automatic Continuous Observation | CO2 | Non-dispersive Infrared analyzer (ND-IR) | ◯ | ◯ | 4 cylinders of standard gas |
| CH4 | Gas chromatograph -Flame Ionized Detector (GC-FID) | ◯ | ◯ | 3 cylinders of standard gas | |
| N2O | Gas chromatograph -Electron Capture Detector (GC-ECD) | ◯ | ◯ | 3 cylinders of standard gas | |
| CO | Gas chromatograph -Reduction Gas Detector (GC-RGD) | ◯ | ◯ | 4 cylinders of standard gas (Ochi-ishi:3) | |
| H2 | Gas chromatograph -Reduction Gas Detector (GC-RGD) | ◯ | ◯ | 4 cylinders of standard gas (Ochi-ishi:3) | |
| O2/N2 | Gas chromatograph -Thermal Conductivity Detector (GC-TCD) | ◯ | ◯ | 1 cylinder of standard gas | |
| NOx | Chemiluminescence | ◯ | ◯ | 1 cylinder of standard gas | |
| SOx | UV fluorescence | ◯ | ◯ | 1 cylinder of standard gas | |
| O3 | UV absorption | ◯ | ◯ | ||
| Halocarbons | Gas chromatograph - Mass Spectrometry (GC-MS) | ◯ | ◯ | 1 cylinder of standard gas | |
| Aerosol | B-Ray Attenuation | ◯ | ◯ | ||
| Aerosol (carbon particles) | Optical reflection | ◯ | ◯ | ||
| Meteorological factors | Wind direction & speed | Wind vane/Propeller anemometer | ◯ | ◯ | On the observation tower |
| Temperature | Resistance Temperature Detector | ◯ | ◯ | By altitude on the tower | |
| Humidity | Electric capacitance | ◯ | ◯ | Observation field・Station building | |
| Solar Radiation | Thermopile pyranometer | ◯ | ◯ | Rooftop of the station building | |
| UV-A and UV-B irradiance | UV spectroradiometer | ◯ | ◯ | Rooftop of the station building | |
| Precipitation | Tipping-bucket | ◯ | ◯ | Observation field・Rooftop of the station building | |
| Atmospheric pressure | Silicon capacitive absolute pressure sensor | ◯ | ◯ | Inside and outside the observation station | |
| Bottle sampling | For O2/N2 measurements | Automatic (sampling every 4 days) | ◯ | ◯ | |
| For 14CO2 measurement | Automatic (sampling every 4 days)・Event sampling | ◯ | ◯ |
【Legend】 H：Hateruma, O：Cape Ochi-ishi, ◯：measuring in progress（Including test measurement）, ー：Not measured (As of February 2024)