Interannual Change of Atmospheric Tide's Amplitude.
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Accession number;02A0808226
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| Title;Interannual Change of Atmospheric Tide's Amplitude. |
| Author;
JINGU MASANORI
(Tokyo Gakugei Univ.)
MARUYAMA TAKETO
(Tokyo Gakugei Univ.)
MORI ATSUSHI
(Tokyo Gakugei Univ.)
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Journal Title;Bulletin of Tokyo Gakugei University. Section 4. Mathematics and Natural Sciences
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Journal Code:G0326A
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ISSN:0371-6813
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VOL.54;NO.;PAGE.155-170(2002)
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| Figure&Table&Reference;FIG.36, REF.6 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Global warming is mainly discussed by surface temperature data. However, as well known, it is difficult to separate the global warming and urbanization, because most of the observation stations are located near populated cities. We think it worths trying to use atmospheric pressure data as an index for arguing about urbanization instead of the temperature itself, because atmospheric pressure, in general, reflects vertical temperature structure via hydrostatic relation. As the first step, the aim of this study is to investigate the interannual change of the diurnal tide's amplitude. Atmospheric tide is a phenomenon with global horizontal scale, however, it is strongly affected by the surface heating, i.e., it should reflects human activities which have the cycle of one day. Therefore, by investigating the diurnal tide's amplitude, the information about the daily change of artificial discharge of heat would be acquired. Our results show that there exists an obvious trend by comparing to the semi-diurnal tide. And it also turns out that there exist a characteristic spatial lengthscale of about 100km for the change of the diurnal tide's amplitude. This confirms that our results are robust. We have not yet successfully explained the reason for this change. And further studies would be required to clarify the reason and mechanism for this interannual change. (author abst.) |
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