• Open Access

Centennial scale warming over Japan: are the rural stations really rural?

Authors

  • L. Das,

    Corresponding author
    1. RIGC/JAMSTEC, 3173-25 Showamachi, Kanazawa-ku Yokohama City, Kanagawa 236-0001, Japan
    2. Department of Agricultural Meteorology and Physics, BCKV, Mohanpur, Nadia 741-252, India
    Current affiliation:
    1. Department of Agricultural Meteorology and Physics, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, Pin 741 252, India
    • Research Institute for Global Change, JAMSTEC, GCPRP-IPCC, 3173-25 Showamachi, Kanazawa-ku, Yokohama City, Kanazawa-ku 236-0001, Japan.
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  • J. D. Annan,

    1. RIGC/JAMSTEC, 3173-25 Showamachi, Kanazawa-ku Yokohama City, Kanagawa 236-0001, Japan
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  • J. C. Hargreaves,

    1. RIGC/JAMSTEC, 3173-25 Showamachi, Kanazawa-ku Yokohama City, Kanagawa 236-0001, Japan
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  • S. Emori

    1. National Institutes for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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Abstract

In this study, we used two novel methods to estimate urban contamination in the Japanese temperature record of the last century. First, we tested different criteria for choosing the rural stations, and found little sensitivity to the method, though the presence of a decreasing local population trend appeared to be a useful indicator. Second, we investigated the relationship between the regional sea surface temperature (SST) and surface air temperature over land, and found a very strong relationship across the coupled model intercomparison project phase 3 multi-model ensemble. Applying this relationship to observational SST data indicates little or no contamination of the trends from the stations identified as rural. Copyright © 2011 Royal Meteorological Society

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