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| 热带西太平洋暖池域次表层水热含量变化及其与我国东部汛期降水和副高的相关关系 |
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翁学传, 张启龙, 颜廷壮
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中国科学院海洋研究所
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| 摘要: |
| 热带西太平洋暖池是太平洋中海气相互作用最活跃的海区之一,它在全球气侯变化中起着极为重要的作用。
热带西太平洋暖池幅员广阔,占全球热带海洋面积的35%-45%。它是全球大洋表面水温(SST)最高的海域,其SST终年都高于28℃。Andow(1987)的研究表明,暖池域次表层(50-300m)海水温度的变化较表层明显,其年际变化的标准偏差可达3-4℃。邹娥梅等(1991)指出,热带西太平洋海域次表层海水的热状况具有较好的指标性。因此研究热带西太平洋暖池域次表层水热状况的变化,对于阐明热带西太平洋暖池与东亚气候异常,特别是对我国旱涝的影响具有重要意义。 |
| 关键词: 热带西太平洋暖池、次表层水热含量变化、汛期降水和副高 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第2440号
本课题为中国科学院KYSS-10项目 |
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| VARIATION OF THE SUBSURFACE WATER HEAT CONTENT IN THE TROPICAL WESTERN PACIFIC WARM POOL AREA AND ITS RELATION TO PRECIPITATION IN EASTERN CHINA AND TO THE WESTERN PACIFIC SUBTROPICAL HIGH |
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Weng Xuechuan, Zhang Qilong, Yan Tingzhuang
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Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| The study on the space-time characteristics of the subsurface water heat content fields in the Tropical Western Pacific Warm Pool area showed that the subsurface water heat content fields fluctuate with a large scale abnormal air-sea system. In the study area, the heat content anomaly fields are negtive during El Nino events, but positive during La Nina events.
There are relatively close relations between the subsurface water heat content in winter and the precipitation in the middle and lower reaches of the Changjiang River or the precipitation in the Huanghe River-Huaihe River area. When the subsurface water heat contents are higher than normal, the precipitation decreases in the middle and lower reaches of the Changjiang River but increases in the Huanghe River-Huaihe River area. and vice versa.
The subsurface water heat content in winter is of a contrary interannual variation trend to both indexes of area and indensity of the Western Pacific Subtropical High and its variation period is nearly equal to those of both indexes of Subtropical High. |
| Key words: TROPICAL WESTERN PACIFIC WARM POOL AREA,SUBSURFACE WATER HEAT CONTENT, ITS RELATION |
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