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題名 | 月相對松山機場海平面氣壓影響之分析研究--西元1978年2月7日至2008年2月6日=The Study of the Influence of Moon Phases on the Mean Sea Level Pressure at Sung-Shan Airport--February 7, 1978 to February 6, 2008 |
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作者 | 蒲金標; | 書刊名 | 大氣科學 |
卷期 | 36:4 2008.12[民97.12] |
頁次 | 頁275-285 |
分類號 | 328.8 |
關鍵詞 | 大氣太陰潮; 大氣太陽潮; 氣壓日變化; 半日潮; 颱風; 月相; 朔望月; 上弦月和下弦月; Lunar atmospheric tides; Solar atmospheric tides; The pressure dirunal changes; Semi-diurnal tides; Typhoon; Moon phases; The new moon; The full moon; First quarter and last quarter; |
語文 | 中文(Chinese) |
中文摘要 | 本文嘗試以1978年2月7日(陰曆正月初一)至2008年2月6日(陰曆十二月二十九日)期間松山機場每日24個整點海平面氣壓觀測紀錄,來分析月相(the moon phases)或大氣太陰潮(lunar atmospheric tides)對松山機場平均海平面氣壓之影響。研究結果顯示松山機場年平均海平面氣壓日變化曲線有半日潮或兩高兩低現象。每日最高氣壓和最低氣壓皆在日間(0900L和1500L)發生,因台北盆地日間受太陽輻射增溫之影響,其氣壓振幅較大,且兩者的相位也比一般中緯度地區提早1小時。而次高氣壓和次低氣壓皆在夜間(2200L和0400L)發生,其氣壓振幅較小,同時兩者的相位皆與一般中緯度地區一致。松山機場在朔望月(synodic month)裡,每逢陰曆朔日(初一)或望日(十五日),受太陽與月球之引潮力(Tide-producing force)方向一致,太陽潮(solar tide)和太陰潮(lunar tide)重疊影響,其全日和逐時平均海平面氣壓比年平均爲低;而每逢上弦(初七)和下弦(二十一日)時,日地與月地的相對位置成直角,太陰潮和太陽潮相干擾,其全日和逐時平均海平面氣壓則比全年平均爲高。朔望日和上下弦海平面氣壓之日變化,四者都與年平均海平面氣壓有相同之半日潮或兩高兩低現象,且四者相位與年平均者一致。每當朔日和望日颱風可能侵襲松山機場或颱風在其附近之機會比上弦和下弦者爲大,前者約爲後者的5.5倍。 |
英文摘要 | This study of the influence of moon phases or lunar atmospheric tides on the mean sea level pressure at the Sungshan Airport is presented. The data analyzed are in the period between February 7,1978 and February 7,2008. The results indicate there is a semi-diurnal (or two-high and two-low) tide in the mean-sea-level pressure diurnal oscillations. The primary pressure maximum and minimum occur during the daytime at 0900L and 1500L, respectively, while the secondary maximum and minimum during the nighttime at 2200L and 0400L, respectively. Additionally, the amplitude extremes of the primary pressure oscillations are larger than the secondary extremes. However, the phase of the primary extremes is 1-hour lag behind that of the mid-latitudes, but there is no lag for the secondary. During the New Moon (the 1st of a lunar month) and the Full Moon (the 15th of a lunar month) when the Earth, Moon, and Sun lie (approximately) in a straight line, the solar and the lunar tides overlap and the sea-level pressure is lower than the mean at the Airport, because the tide-producing force induced by the Sun and Moon reaches maximum. On the other hand, during the First Quarter (the 7th day of a lunar month) and the Last Quarter (the 21st of a lunar month) the Sun-Earth's and the Moon-Earth's relative positions are perpendicular to each other with respect to Earth, the solar and the lunar tides interfere mutually, the Airport sea-level pressure is greater than the annual mean due to the tide-producing force reaching minimum. The semi-diurnal oscillations of these 4 days, namely: the New Moon, the Full Moon, the First Quarter, and the Last Quarter, have the pattern as the annual mean oscillation. Their phases are also the same as the annual mean. During the New Moon and the Full Moon, the occurrences of typhoons have higher frequency of reaching the Airport than those of the First Quarter and the last Quarter, the former approximately for the latter's 5.5 times. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。