Special Issue: Special section for IUGG workshop: Lithospheric Structure of a Supercontinent:Gondwana
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Fog observations with a millimeter-wave scanning radar at Miyoshi basin, Japan
Earth, Planets and Space volume 56, pages 259–268 (2004)
A special fog observation campaign was conducted in the Miyoshi basin, Hiroshima prefecture, Japan during the period November 7–15, 2000. We observed the spatial distributions of fogs and their movements using a millimeter-wave scanning radar. This is the first time that the distribution of basin fogs associated with fog development and decay processes has been examined. Echo intensity observed with the radar, which is mainly associated with fog particle size, was almost under −23 dBZ at levels below 200 m in height. The horizontal distribution of echo intensity changed with time. Namely, weak echoes were observed over nearly all observation areas at first, and then the echoes gradually became stronger as the fogs developed, although the echoes were weaker at higher levels. After sunrise, the echoes decayed. During the developing periods, the occurrence ratio of the echo intensity between −38 and −23 dBZ increased from the lower height, while the ratio decreased from the higher levels during the decay periods. This feature in the developing period is consistent with the results of optical measurements but the feature in the decaying period is inconsistent. It is suggested that this inconsistency is due to the difference in sensitivity between the two measurement approaches.
Hamazu, K., H. Hashiguchi, T. Wakayama, T. Matsuda, R. J. Doviak, and S. Fukao, A 35-GHz scanning Doppler radar for fog observations, J. Atmos. Ocean. Tech., 20, 972–986, 2003.
Kidron, G. J., Analysis of dew precipitation in three habitats within a small arid drainage basin, Negev Highlands, Israel, Atmos. Res., 55, 257–270, 2000.
Kidron, G. J., A. Yair, and A. Danin, Dew variability within a small arid drainage basin in the Negev Highlands, Israel, Quart. J. Royal. Meteorol. Soc., 126, 63–80, 2000.
Kropfli, R. A., W. R. Moninger, and F. Pasqualucci, Circular depolarization ratio and Doppler velocity measurements with a 35-GHz radar during the Cooperative Convective Precipitation Experiment, Radio Science, 19, 141–147, 1984.
Kunkel, A. B., Parameterization of droplet terminal velocity and extinction coefficient in fog models, J. Clim. Appl. Meteor., 23, 34–41, 1984.
Mason, S. J., The physics of radiation fog, J. Meteor. Soc. Japan, 60, 486–499, 1982.
Miyata, K., Study of Fogs in the Miyoshi Basin, 255pp, Keisuisha Co., Ltd., 1994 (in Japanese).
Pasqualucci, F., Drop size distribution measurements in convective storms with a vertically pointing 35-GHz Doppler radar, Radio Science, 19, 177–183, 1984.
Pilie, J. R., E. J. Mack, W. C. Kocmond, C. W. Rogers, and W. J. Eadie, The life cycle of valley fog. Part I: Micrometeorological characteristics, J. Appl. Meteor., 14, 347–363, 1975a.
Pilie, J. R., E. J. Mack, W. C. Kocmond, C. W. Rogers, and W. J. Eadie, The life cycle of valley fog. Part II: Fog Microphysics, J. Appl. Meteor., 14, 364–374, 1975b.
Research society of climate in a small area, On characteristic features of the basin fog at Ena district, Tenki, No. 41–1, 23–35, 1994 (in Japanese).
Sauvageot, H., Radar Meteorology, Artech House, Inc., Boston, 92, 1992.
Sawai, T., Understanding fog structure, Tenki, 29, 731–747, 1982 (in Japanese).
Sea fogs research team, Observations of sea fog in Kushiro district, Tenki, 32, 41–52, 1985 (in Japanese).
Shimohata, I., On the morning fog observed in Hida, Tenki, No. 39–9, 27–29, 1992 (in Japanese).
Tanaka, M., K. Miyata, T. Maitani, T. Hayashi, Y. Itoh, M. Horiguchi, T. Terao, T. Iwata, and Y. Ohashi, Intensive Fog Observations over Miyoshi Basin, Annuals of Disaster Prevention Research Institute, Kyoto University, No. 43 B-1, 185–209, 2000 (in Japanese).
Tanaka, M., K. Miyata, T. Maitani, T. Hayashi, Y. Ito, M. Horiguchi, T. Terao, T. Iwata, Y. Ohashi, K. Miyashita, M. Ohara, and H. Hashiguchi, Studies on the local circulations and fog formations over the basin, Disaster Prevention Research Institute, Kyoto University, 12G-16, 3–77, 2001a (in Japanese).
Tanaka, M., K. Miyata, T. Maitani, T. Hayashi, Y. Itoh, M. Horiguchi, T. Terao, T. Iwata, Y. Ohashi, M. Oohara, K. Miyashita, H. Hashiguchi, and M. Teshiba, Intensive Fog Observations over Miyoshi Basin (Part II), Annuals of Disaster Prevention Research Institute, Kyoto University, No.44 B-1, 37–69, 2001b (in Japanese).
Uematsu, A., H. Hashiguchi, M. Teshiba, H. Tanaka, K. Hirashima, and S. Fukao, Moving cellular structure of fog echoes obtained with a millimeter-wave scanning Doppler radar at Kushiro, Japan, J. Appl. Me-teorol., 2004 (submitted).
Uyeda, H. and T. Yagi, Observation of sea fogs at the urban area and the coastal suburbs in Kushiro city, Hokkaido, Tenki, 31, 137–145, 1984 (in Japanese).
Yamamoto, A., K. Akaeda, and O. Suzuki, The evaluation of the airport fog observation radar, Abst. of 2nd Intern. Conf. on Fog and Fog Collection, 2, 391–394, 2001.
Yanagisawa, Z., M. Ishihara, and T. Sawai, Observations of sea fogs by 8.6 millimeter radar, Tenki, 33, 603–612, 1986 (in Japanese).
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Teshiba, M., Hashiguchi, H., Uematsu, A. et al. Fog observations with a millimeter-wave scanning radar at Miyoshi basin, Japan. Earth Planet Sp 56, 259–268 (2004). https://doi.org/10.1186/BF03353408
- remote sensing
- millimeter-wave radar
- mesoscale meteorology
- boundary layer meteorology