| 春季青藏高原感热异常对长江中下游夏季降水影响的初步研究 |
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| 引用本文： | 柏晶瑜,徐祥德,周玉淑,张雪金.春季青藏高原感热异常对长江中下游夏季降水影响的初步研究[J].应用气象学报,2003,14(3):363-368. |
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| 作者姓名： | 柏晶瑜 徐祥德 周玉淑 张雪金 |
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| 作者单位： | 1.中国气象科学研究院，北京 100081 |
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| 基金项目： | 科技部基础研究重大项目前期研究专项“东亚季风科学试验预研究”( 2 0 0 1CCB0 0 40 0 )的资助。 |
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| 摘 要： | 探讨了春季青藏高原感热的分布特征，对高原地区地-气温差与感热的合成分析表明，长江中下游地区旱涝年春季高原近地层热力结构分布呈显著差异；统计分析与数值模拟试验也证实了春季高原下垫面感热南北非均匀异常分布，对长江中下游地区夏季降水存在着显著影响，即春季高原下垫面感热非均匀异常分布特征可能是长江中下游地区夏季旱涝的“强信号”之一。
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| 关 键 词： | 青藏高原 感热 长江中下游 夏季降水 |
| 收稿时间： | 2002-04-05 |
| 修稿时间： | 2002年4月5日 |
Preliminary Research on Inhomogeneous Distribution of Tibetan Plateau Sensible Heat Fluxes in Spring |
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| Bai Jingyu,Xu Xiangde,Zhou Yushu,Zhang Xuejin.Preliminary Research on Inhomogeneous Distribution of Tibetan Plateau Sensible Heat Fluxes in Spring[J].Quarterly Journal of Applied Meteorology,2003,14(3):363-368. |
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| Authors: | Bai Jingyu Xu Xiangde Zhou Yushu Zhang Xuejin |
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| Affiliation: | 1.Chinese Academy of Meteorological Sciences, Beijing 1000812.Institute of Atmospheric Physics, Beijing 100029 |
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| Abstract: | Study is undertaken of Tibetan sensible heat flux features in spring prior to the summer flood/drought in the milled and lower reaches of the Yangtze River (hereafter referred as MLRY). Analysis of the difference of atmospheric temperatures and 0 cm soil temperatures indicates that the Tibetan thermodynamic structure displays noticeable discrepancy preceding flood/drought in MLRY: there exists an air-ground temperature difference pattern of "high in South and low in North" in spring before flood and "high in North and low in South" before the drought. Sensible heat fluxes on Tibetan Plateau show that the spring flux difference (of flood and drought in MLRY) in the target regions takes on "high in South and low in North" manner. Outcome of simulations suggests that Tibetan plateau sensible heat fluxes in spring on a south-north inhomogeneous basis lead to the summer precipitation abnormity in MLRY, that is, the Tibetan sensible heat flux anomaly is one of the "strong signals" which contribute to the flood/drought in MLRY. |
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| Keywords: | Tibetan Plateau Sensible heat fluxes Middle and lower reaches of the Yangtze River Summer precipitation |
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