Ryori
Ryori Station is located on a hilly cape on the Pacific coast of the Tohoku Region (Figures 7.1.1.1 and 7.1.1.2). The station is situated about 10 km east-southeast of the central part of Ofunato City, and about 120 km from Sendai City, the largest city in the region. Being isolated from populated areas, the area surrounding the station is not significantly affected by local sources of pollution, and thus satisfies the conditions required for a GAW Regional Station. In April 2002, the station was moved about 270 m northeastward from its original site, resulting in a change of its altitude from 230 m to 260 m, and the altitude of its air inlet from 260 m to 272 m. Table 7.1.1.2 lists the observation parameters and systems used at Ryori Station.
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Fig. 7.1.1.1 Location map of Ryori station. |
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Fig. 7.1.1.2 Location view of Ryori station. |
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Table 7.1.1.2 Observation parameters, frequency and instruments at Ryori station. |
| Parameter | Start of observation | Frequency | Instrument |
|---|---|---|---|
| CO2 | January 1987 | Continuous | Non-dispersive Infrared Analyzer (NDIR) HORIBA, Ltd. VIA500R |
| January 2004 | Continuous | Non-dispersive Infrared Analyzer (NDIR) HORIBA, Ltd. VIA510R |
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| January 2009 | Continuous | Non-dispersive Infrared Analyzer (NDIR) LI-COR Biosciences, Inc. LI-7000 |
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| CH4 | January 1991 | Continuous | Non-dispersive Infrared Analyzer (NDIR) HORIBA, Ltd. GA360-S |
| January 2009 | Continuous | Gas Chromatograph with FID Round Science Inc. RGC-1 |
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| CO | January 1991 | Continuous | Non-dispersive Infrared Analyzer (NDIR) HORIBA, Ltd. GA360-S |
| January 2009 | Continuous | Gas Chromatograph with RGD Round Science Inc. TRA-1 |
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| O3 | January 1990 | Continuous | UV Ozone Monitor EBARA JITSUGYO CO.,LTD. EG-2001F |
| January 2005 | Continuous | UV Ozone Monitor EBARA JITSUGYO CO.,LTD. EG-2001FTP |
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| January 2009 | Continuous | UV Ozone Monitor Thermo Fisher Scientific Inc. 49i |
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| Chlorofluorocarbons | January 1990 | Once per hour | Gas Chromatograph with ECD Yanaco Ohgi Co., Ltd. AG-1000EN |
| September 2003 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-14B |
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| February 2008 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-2014 |
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| N2O | January 1990 | Once per hour | Gas Chromatograph with ECD Yanaco Ohgi Co., Ltd. AG-1000EN |
| March 2004 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-14B |
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| February 2008 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-2014 |
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| CH3CCl3 CCl4 |
January 1991 | Once per hour | Gas Chromatograph with ECD Yanaco Ohgi Co., Ltd. AG-1000EN |
| March 2005 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-14B |
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| February 2008 | Once per hour | Gas Chromatograph with ECD THE GENERAL ENVIRONMENTAL TECHNOS CO., LTD. Shimadzu Corporation GC-2014 |
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| Atmospheric deposition | January 1976 | Once per day (precipitation) month (atmosphere) |
Automatic Sampler Ogasawara Keiki Seisakusho Co.,LTD. |
| Aerosol optical depth | January 1988 | Three times per day | Sunphotometer EKO INSTRUMENTS CO., LTD. MS-110 |
| January 2006 | Three times per day | Sunphotometer PMOD/WRC PFR |
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| April 2007 | Continuous | ||
| Aerosol vertical profile | March 2002 | Four times per day | Lidar NEC Corporation |
Ryori is in a climate for the Pacific Ocean side of the Tohoku Region. The annual mean temperature in a normal year is 10.3°C, the mean temperatures in January and February are below 0°C, and the mean temperature in August is about 22°C. The amount of precipitation increases during the warmer seasons, especially during the months from June to September; in winter it snows from time to time, but the amount is small. The annual precipitation is about 1350 mm.
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Fig. 7.1.1.3 Daily mean, daily maximum and minimum temperatures, and daily precipitation amounts at Ryori station in 2009. |
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Fig. 7.1.1.4 Monthly and annual wind roses at Ryori station in 2009. |
Ryori | Minamitorishima | Yonagunijima | Syowa | Ground-base Meteorological Observation