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頁籤選單縮合
題 名 | Ozone Trend Over Taiwan from TOMS Data=TOMS資料分析臺灣臭氧變化趨勢 |
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作 者 | 徐光蓉; 翁玉林; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷 期 | 10:3 1999.09[民88.09] |
頁 次 | 頁619-632 |
分類號 | 445.9 |
關鍵詞 | TOMS; 臺灣; 臭氧; 溫室效應; Total ozone; Trend; |
語 文 | 英文(English) |
英文摘要 | Ozone column data obtained from Nimbus 7 satellite instrument,TOMS, were analyzed. Total ozone data over Taiwan starts November 1978till May 1993. Daily observations were changed into monthly data for trendanalysis. First, spectral analyses were performed to find possible atmosphericmovements. Significant peaks were found at periods of 6, 12, 19, and 29months. The first two are due to seasonal variations. The last one corresponds to the quasi-biennial oscillation (QBO) in stratosphere. It is suggested that the 19-months period is the difference of the annual and theequatorial QBO frequencies. A linear regression model (LRM) described by Yang and Tung (J. ofGeophysical Res. 100, 9091) 1995) were adapted to the deseasoned ozonedata. Besides the QBO, the solar flux and ENSO are known to affect theamount of ozone in the Earth atmosphere. The 30-mbar Singapore windand F10.7-cm solar flux were chosen to represent variations of QBO andsolar flux, respectively. The estimated total ozone decreasing trends due toanthropogenic activities are 0.92 ± 0.46 and 1.77 ± 0.52 per decade overTaipei and Cheng-Kung, respectively. Increase in tropospheric productionof ozone in Taipei may explain the lower trend in Taipei than that in ChengKung. Estimated contributions from natural variables to the total ozonevariations arc: 3.2 and 2.8 from QBO maximum to minimum; 2.0and 2.3 per 100 solar units for Taipei and Cheng-Kung, respectively.Influence from ENSO seems to be insignificant. Comparison with groundtotal ozone stations will be discussed. |
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