• Agency for Natural Resources and Energy of Japan, 1999: Impact of heated water discharge from heat and nuclear power plant on sea water temperature: The relationship between the amount of heated water discharge and its spatiotemporal scale of diffusion area. Guide of the Environment Impact Assessment of Electrical Power Plant, Denryoku-Shinpou-sha, 570 pp.

    • Search Google Scholar
    • Export Citation
  • Agency for Natural Resources and Energy of Japan, 2008: The General Description of the Development of Electric Power Resources 2007. Okumura Printing Co., Ltd., 231 pp.

    • Search Google Scholar
    • Export Citation
  • Bjerknes, J., 1969: Atmospheric teleconnections from the equatorial Pacific. Mon. Wea. Rev., 97 , 163172.

  • Fairall, C. W., , E. F. Bradley, , J. S. Godfrey, , G. A. Wick, , J. B. Edson, , and G. S. Young, 1996: Cool-skin and warm-layer effects on sea surface temperature. J. Geophys. Res., 101 , 12951308.

    • Search Google Scholar
    • Export Citation
  • Flament, P., , J. Firing, , M. Sawyer, , and C. Trefois, 1994: Amplitude and horizontal structure of a large diurnal sea surface warming event during the Coastal Ocean Dynamics Experiment. J. Phys. Oceanogr., 24 , 124139.

    • Search Google Scholar
    • Export Citation
  • Freitas, E. D., , C. M. Rozoff, , W. R. Cotton, , and P. L. Silva Dias, 2007: Interactions of an urban heat island and sea-breeze circulations during winter over the metropolitan area of São Paulo, Brazil. Bound.-Layer Meteor., 122 , 4365. doi:10.1007/s10546-006-9091-3.

    • Search Google Scholar
    • Export Citation
  • Fujibe, F., 2003: Long-term surface wind changes in the Tokyo metropolitan area in the afternoon of sunny days in the warm season. J. Meteor. Soc. Japan, 81 , 141149.

    • Search Google Scholar
    • Export Citation
  • Gemmill, W., , B. Katz, , and X. Li, 2007: Daily real-time, global sea surface temperature, high-resolution analysis: RTG_SST_HR. NOAA/NWS/NCEP/MMAB Office Note 260, 39 pp.

    • Search Google Scholar
    • Export Citation
  • Guan, L., , and H. Kawamura, 2003: SST availabilities of satellite infrared and microwave measurements. J. Oceanogr., 59 , 201209.

  • Guan, L., , and H. Kawamura, 2004: Merging satellite infrared and microwave SSTs: Methodology and evaluation of the new SST. J. Oceanogr., 60 , 905912.

    • Search Google Scholar
    • Export Citation
  • Hinata, H., , H. Yagi, , T. Yoshioka, , and K. Nadaoka, 2000: Field measurements of currents and material transport at Tokyo-Bay mouth in the condition of Kuroshio warm water intrusion in winter (in Japanese with English abstract). J. Hydraul. Coastal Environ. Eng., II-52 (656) 221238.

    • Search Google Scholar
    • Export Citation
  • Holt, T., , J. Pullen, , and C. H. Bishop, 2009: Urban and ocean ensembles for improved meteorological and dispersion modeling of the coastal zone. Tellus, 61A , 232249. doi:10.1111/j.1600-0870.2008.00377.x.

    • Search Google Scholar
    • Export Citation
  • Horel, J. D., , and J. M. Wallace, 1981: Planetary-scale phenomena associated with the Southern Oscillation. Mon. Wea. Rev., 109 , 813829.

    • Search Google Scholar
    • Export Citation
  • JMA, 2007: Outline of the operational numerical weather prediction at the Japan Meteorological Agency. WMO Tech. Progress Rep. on the Global Data-Processing and Forecasting System and Numerical Weather Prediction, Japan Meteorological Agency, 90–115.

    • Search Google Scholar
    • Export Citation
  • Kanda, M., , Y. Inoue, , and I. Uno, 2001: Numerical study on cloud lines over an urban street in Tokyo. Bound.-Layer Meteor., 98 , 251273.

    • Search Google Scholar
    • Export Citation
  • Kawai, Y., , and H. Kawamura, 2000: Study on a platform effect in the in situ sea surface temperature observations under weak wind and clear sky conditions using numerical models. J. Atmos. Oceanic Technol., 17 , 185196.

    • Search Google Scholar
    • Export Citation
  • Kawai, Y., , and H. Kawamura, 2002: Evaluation of the diurnal warming of sea surface temperature using satellite-derived marine meteorological data. J. Oceanogr., 58 , 805814.

    • Search Google Scholar
    • Export Citation
  • Kawai, Y., , and A. Wada, 2007: Diurnal sea surface temperature variation and its impact on the atmosphere and ocean: A review. J. Oceanogr., 63 , 721744.

    • Search Google Scholar
    • Export Citation
  • Kawai, Y., , K. Otsuka, , and H. Kawamura, 2006: Study on diurnal sea surface temperature warming and a local atmospheric circulation over Mutsu Bay. J. Meteor. Soc. Japan, 84 , 725744.

    • Search Google Scholar
    • Export Citation
  • Kobayashi, F., , H. Sugawara, , Y. Ogawa, , M. Kanda, , and K. Ishii, 2007: Cumulonimbus generation in Tokyo metropolitan area during mid-summer days. J. Atmos. Electr., 27 , 4152.

    • Search Google Scholar
    • Export Citation
  • Konda, M., , N. Imasato, , K. Nishi, , and T. Toda, 1994: Measurement of the sea surface emissivity. J. Oceanogr., 50 , 1730.

  • Kondo, J., 1975: Air–sea bulk transfer coefficients in diabatic conditions. Bound.-Layer Meteor., 9 , 91112.

  • Kondo, J., , G. Naito, , and Y. Fujinawa, 1972: Semi-diurnal change in temperature of the sea water (in Japanese with English abstract). J. Mar. Meteor. Soc., 48 , 5359.

    • Search Google Scholar
    • Export Citation
  • Kusaka, H., , F. Kimura, , H. Hirakuchi, , and M. Mizutori, 2000: The effect of land-use alteration on the sea breeze and daytime heat island in the Tokyo metropolitan area. J. Meteor. Soc. Japan, 78 , 405420.

    • Search Google Scholar
    • Export Citation
  • NCEP, cited. 2008: The Weather Research and Forecasting model. [Available online at http://wrf-model.org/index.php].

  • Oda, R., , R. Moriwaki, , and M. Kanda, 2006: Seasonal and diurnal evolution of energy, H2O and CO2 fluxes over Tokyo Bay (in Japanese with English abstract). Ann. J. Hydraul. Eng., 50 , 463468.

    • Search Google Scholar
    • Export Citation
  • Ohashi, Y., , and H. Kida, 2001: Observational results of the sea breeze with a weak wind region over the Northern Osaka urban area. J. Meteor. Soc. Japan, 79 , 949955.

    • Search Google Scholar
    • Export Citation
  • Price, J. F., , R. A. Weller, , C. M. Bowers, , and M. G. Briscoe, 1987: Diurnal response of sea surface temperature observed at the long-term upper ocean study (34°N, 70°W) in the Sargasso Sea. J. Geophys. Res., 92 , 1448014490.

    • Search Google Scholar
    • Export Citation
  • Pullen, J., , T. Holt, , A. F. Blumberg, , and R. D. Bornstein, 2007: Atmospheric response to local upwelling in the vicinity of New York–New Jersey harbor. J. Appl. Meteor. Climatol., 46 , 10311105.

    • Search Google Scholar
    • Export Citation
  • Robinson, I. S., 2004: The thermal skin layer of the ocean surface. Measuring the Oceans from Space: The Principles and Methods of Satellite Oceanography, Springer, 272–277.

    • Search Google Scholar
    • Export Citation
  • Sakurai, T., , Y. Kurihara, , and T. Kuragano, 2005: Merged satellite and in-situ data global daily SST. Proc. Int. Geoscience and Remote Sensing Symp., Seoul, South Korea, IEEE, 2606–2608.

    • Search Google Scholar
    • Export Citation
  • Soloviev, A., , and R. Lukas, 1997: Observation of large diurnal warming events in the near-surface layer of the western equatorial Pacific warm pool. Deep-Sea Res. I, 44 , 10551076.

    • Search Google Scholar
    • Export Citation
  • Thiébaux, J., , E. Rogers, , W. Wang, , and B. Katz, 2003: A new high-resolution blended real-time global sea surface temperature analysis. Bull. Amer. Meteor. Soc., 84 , 645656.

    • Search Google Scholar
    • Export Citation
  • Unoki, S., 1985: Physical oceanography of Tokyo Bay (in Japanese). Coastal Oceanography of Japanese Islands, Coastal Oceanography Research Committee, Oceanographic Society of Japan, Eds., Tokai University Press, 344–361.

    • Search Google Scholar
    • Export Citation
  • Unoki, S., , and M. Kubota, 1996: Rhythm of the tides (in Japanese). Waves and Currents in the Ocean, Tokai University Press, 35–59.

  • Webster, P. J., , C. A. Clayson, , and J. A. Curry, 1996: Clouds, radiation, and the diurnal cycle of sea surface temperature in the tropical western Pacific. J. Climate, 9 , 17121730.

    • Search Google Scholar
    • Export Citation
  • Yagi, H., , K. Nadaoka, , Y. Uchiyama, , and H. Hinata, 2000: Comparative analysis of long-term subsurface water temperature variation in Tokyo Bay, Kashima Coast and Kasumigaura (in Japanese with English abstract). J. Hydraul. Coastal Environ. Eng., II-52 (656) 239254.

    • Search Google Scholar
    • Export Citation
  • Yang, G-Y., , and J. Slingo, 2001: The diurnal cycle in the tropics. Mon. Wea. Rev., 129 , 784801.

  • Yokoyama, R., , S. Tanba, , and T. Souma, 1995: Sea surface effects on the sea surface temperature estimation by remote sensing. Int. J. Remote Sens., 16 , 227238.

    • Search Google Scholar
    • Export Citation
  • Yoshikado, H., 1992: Numerical study of the daytime urban effect and its interaction with the sea breeze. J. Appl. Meteor., 31 , 11461164.

    • Search Google Scholar
    • Export Citation
  • Zhang, C., 2005: Madden-Julian oscillation. Rev. Geophys., 43 , RG2003. doi:10.1029/2004RG000158.

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Observed Sea Surface Temperature of Tokyo Bay and Its Impact on Urban Air Temperature

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  • 1 Tokyo Institute of Technology, Tokyo, Japan
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Abstract

Sea surface temperature (SST) and air temperature were measured in situ in Tokyo Bay. These measurements were made with high spatial and temporal resolutions between November 2006 and September 2007. The analysis of these data revealed 1) the seasonal and diurnal variations of SST and air temperature, and 2) the physical process by which Tokyo Bay lowers urban air temperature in summer. The following were the major findings obtained: 1) the diurnal amplitude of SST was as large as 5.5°C; 2) abrupt increases of SST occurred at the head and mouth of the bay that were due to heated water discharge and the Kuroshio, respectively; 3) the values of the satellite-based objectively analyzed SSTs were higher than those of the in situ SSTs, especially in winter; 4) the relationship between SST and air temperature was classified into three seasonal modes—winter, transient, and summer—and each mode was associated with the seasonal stability condition of the near-surface water; 5) the strong southwesterly wind over the bay in summer decreased the SST mainly because of increased turbulent mixing at the water surface, thereby increasing downward sensible heat flux up to −100 W m−2; 6) the lower SSTs in summer lowered the air temperature, but only for the urban atmosphere near the coast, and no effect was detected at 20 km inland; and 7) the horizontal gradient of air temperature over the land intensified with increasing wind speed.

* Current affiliation: National Institute of Information and Communications Technology, Tokyo, Japan.

Corresponding author address: Ryoko Oda, National Institute of Information and Communications Technology, 4-2-1, Nukui-kita-machi, Koganei-shi, Tokyo 184-8795, Japan. Email: oda.r@nict.go.jp

Abstract

Sea surface temperature (SST) and air temperature were measured in situ in Tokyo Bay. These measurements were made with high spatial and temporal resolutions between November 2006 and September 2007. The analysis of these data revealed 1) the seasonal and diurnal variations of SST and air temperature, and 2) the physical process by which Tokyo Bay lowers urban air temperature in summer. The following were the major findings obtained: 1) the diurnal amplitude of SST was as large as 5.5°C; 2) abrupt increases of SST occurred at the head and mouth of the bay that were due to heated water discharge and the Kuroshio, respectively; 3) the values of the satellite-based objectively analyzed SSTs were higher than those of the in situ SSTs, especially in winter; 4) the relationship between SST and air temperature was classified into three seasonal modes—winter, transient, and summer—and each mode was associated with the seasonal stability condition of the near-surface water; 5) the strong southwesterly wind over the bay in summer decreased the SST mainly because of increased turbulent mixing at the water surface, thereby increasing downward sensible heat flux up to −100 W m−2; 6) the lower SSTs in summer lowered the air temperature, but only for the urban atmosphere near the coast, and no effect was detected at 20 km inland; and 7) the horizontal gradient of air temperature over the land intensified with increasing wind speed.

* Current affiliation: National Institute of Information and Communications Technology, Tokyo, Japan.

Corresponding author address: Ryoko Oda, National Institute of Information and Communications Technology, 4-2-1, Nukui-kita-machi, Koganei-shi, Tokyo 184-8795, Japan. Email: oda.r@nict.go.jp

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