今年3至5月台灣氣溫及雨量展望 - 颱風討論

交通部中央氣象局新聞稿 發布日期：97年2月29日
編 號：中象97字第2號
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今年3至5月台灣氣溫及雨量展望

中央氣象局表示，今(97)年3至5月台灣平均氣溫以接近氣候正常範圍的機率較大；雨
量方面，在未來3個月中也以接近氣候正常範圍的機率較大，惟在3月份台灣北部及中
部則會有較高的偏少雨機會。

氣象局同時指出，去年秋天以來太平洋熱帶海洋出現「反聖嬰現象」，全球部分地區
的氣候也受到直接或間接的影響。根據過去資料顯示，在反聖嬰現象較強的時候，東
亞冬季的東北季風有偏強傾向，有利於冷空氣南下影響台灣，但較不利多雨條件的形
成。由去(96)年12月至今年2月冬季期間實測資料顯示，本次冬季台灣氣候變化程度
較大，1月以前氣候偏暖，2月份期間因持續受偏強大陸冷氣團影響，各地氣溫明顯偏
低，統計冬季3個月季節平均氣溫則為接近氣候正常。雨量方面，3個月累積降水亦為
接近氣候正常，1月下旬至2月中旬北部雖有連日陰雨天氣，惟因降水系統對流性不強，
累積降水量並沒有偏多。

不過，氣象局特別提醒，3、4月的台灣進入春季，常會有鋒面系統在台灣附近形成，
由於受對流增強的影響，可能會在局部地區帶來較大的雨勢，並有伴隨雷雨發生的機
會，應注意防範。氣象局還強調，台灣的西部地區在春季期間常會有局部性濃霧出現，
民眾也要特別留意行車安全。到了5月份，則因即將進入台灣的主要雨季—梅雨季節，
屆時防汛準備工作即應事先做好。

本新聞稿聯絡人：氣象預報中心主任吳德榮 Tel：23491234、0935009387

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PRESS RELEASE

Contact: Daniel Der-Yuan Wu
Director
Weather Forecast Center, Central Weather Bureau (02)2349-1234


Climate Outlook for March-May in Taiwan

Taipei, Taiwan--February 29, 2008-According to the most recent three-month
climate prediction by the Central Weather Bureau (CWB), the mean temperatures
of March to May over Taiwan area will tend to be near normal. Also, near
normal precipitation will be very likely; however, a high probability of
below normal rainfall in March for Central and North Taiwan may occur.

The CWB pointed out that, since last fall, La Nina phenomenon had been
dominating the tropical Pacific Ocean. Referring to historical data, an
occurrence of La Nina is liable to cause a stronger winter monsoon in East
Asia that may bring about colder weather down south. But such pattern may
give rise to a high probability of a relatively drier environment over
Taiwan during early springtime. From monitoring data over last December
through February, the average temperatures of Taiwan appeared normal with
large variations over the three months—a slightly warmer climate by January
and continual impact of strong cold air mass in February. The total rainfall
amounts in this period were also close to normal values resulting from lack
of stronger convective rainfall systems even though during rainy days.

The CWB reminded that typically March and April will be Taiwan’s spring
season. Frontal systems with strong convective cells usually form up
around this area, which often induce local heavy rainfall associated with
thunderstorms. Additionally, dense fogs would quite likely appear in this
season along West Taiwan. And May—the beginning of Mei-Yu season, is
among Taiwan’s major rainy periods. The CWB warned that the public should
pay more attention to traffic safety and flooding preparedness for such
weather conditions.

The CWB monthly and seasonal climate outlook can be viewed at its web site:
http://www.cwb.gov.tw

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http://www.cwb.gov.tw/V5/news/Newsbb/970229.doc



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