1994 Fiscal Year Final Research Report Summary
Development of Dew-Point-Sonde without CFCs
| Project/Area Number |
05554011
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Nagoya University |
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Principal Investigator |
IWASAKA Yasunobu Nagoya Univ., STE Lab., prof., 太陽地球環境研究所, 教授 (20022709)
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| Co-Investigator(Kenkyū-buntansha) |
NUMATA Noriyuki INST.AEROSOL RES., HEAD, 研究者(代表)
KONDO Yutaka Nagoya Univ., STE Lab., Prof., 太陽地球環境研究所, 教授 (20110752)
HAYASHI Masahiko Nagoya Univ., STE Lab., Res.Assoc., 太陽地球環境研究所, 助手 (50228590)
MATSUNAGA Katsuji Nagoya Univ., STE Lab., Assoc.Prof, 太陽地球環境研究所, 助教授 (60022729)
SHIBATA Takashi Nagoya Univ., STE Lab., Assoc.Prof., 太陽地球環境研究所, 助教授 (70167443)
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| Project Period (FY) |
1993 – 1994
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| Keywords | New Dew (Frost) Point Sonde / Stratospheric Water Vapor Detection / Non-CFCs Dew-Point Sonde / Comparison Lidar and Sonde |
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| Research Abstract |
Dew-point-sonde which has been used for routine observation of upper atmospheric water vapor is now inhibited to use since this type sonde contains CFCs to cool mirror surface. Therefore there are few data on water vapor content of the stratosphere although information on stratospheric water vapor is important to do accurate weather forcast. During this project, we discussed and summarized technical points as follow to develope the new-type dew (frost) point sonde which had non-CFCs.
According to laboratory experiment, following points can be concluded ;
1.Optical systems with semiconductor laser and Si-photo diode was very effective to detect dew droplets on mirror surfaceand depolarization changes in scattering light from the droplets.
2.Proto type sonde was made and handing efficinecy was tested. The results of experiments showed that quality controle of mirror surface is very important, and total weight of sonde including buttery decreased comparing the value of traditional type sonde owing to weight increase of optical system which used to detect polarization properties of scattering light. In conclusion, dew (frost) point zonde which is used for upper atmospheric water vapor is practically hopeful.
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Research Products
(4 results)
