| Spatial and temporal variability of heat content above the thermocline in the tropical Pacific Ocean |
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| 作者姓名： | Pu Shuzhen Yu Fei Hu Xiaomin Chen Xingrong |
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| 作者单位： | Pu Shuzhen，Yu Fei，Hu Xiaomin，Chen Xingrong First Institute of Oceanography，State Oceanic Administration，Qingdao 266061，China |
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| 基金项目： | This study was supported by the National Key Progamme for Developing Basic Sciences of China under contract No. G1998040900(Part 1). |
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| 摘 要： | Abstract-Heat content of the upper layer above the 20℃ isotherm in the tropical Pacific Ocean isestimated by using the sea temperature data set with a resolution 2°latitude×5°longitude (1980～1993)for the water depths (every 10 m) from 0 m to 400 m, and its temporal and spatial variabilities are an-alyzed. (1) The temporal variability indicates that the total heat in the upper layer of the equatorial Pa-cific Ocean is charcterized by the interannual variability. The time series of the equatorial heat anomaly5 months lead that of the El Nino index at the best positive lag correlation between the two, and theformer 13 months lag behind the latter at their best negative lag correlation. Therefore the equatorialheat content can be used as a better predictor than the El Nino index for a warm or cold event. In addi-tion, it is also found that less heat anomaly in the equator corresponds to the stronger warm events inthe period (1980～1993) and much more heat was accumulated in the 4 years including 1992/1
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| 关 键 词： | Heat content ENSO tropical Pacific Ocean |
| 收稿时间： | 2002/4/12 0:00:00 |
| 修稿时间： | 2003/1/24 0:00:00 |
Spatial and temporal variability of heat content above the thermocline in the tropical Pacific Ocean |
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| Pu Shuzhen,Yu Fei,Hu Xiaomin,Chen Xingrong.Spatial and temporal variability of heat content above the thermocline in the tropical Pacific Ocean[J].Acta Oceanologica Sinica,2003,22(2):179-190. |
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| Authors: | Pu Shuzhen Yu Fei Hu Xiaomin and Chen Xingrong |
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| Institution: | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | Heat content of the upper layer above the 20℃ isotherm in the tropical Pacific Ocean is estimated by using the sea temperature data set with a resolution 2°latitude × 5°longitude (1980～1993) for the water depths (every 10 m) from 0 m to 400 m, and its temporal and spatial variabilities are analyzed. ( 1 ) The temporal variability indicates that the total heat in the upper layer of the equatorial Pacific Ocean is characterized by the interannual variability. The time series of the equatorial heat anomaly 5 months lead that of the El Nino index at the best positive lag correlation between the two, and the former 13 months lag behind the latter at their best negative lag correlation. Therefore the equatorial heat content can be used as a better predictor than the El Nino index for a warm or cold event. In addition, it is also found that less heat anomaly in the equator corresponds to the stronger warm events in the period (1980～1993) and much more heat was accumulated in the 4 years including 1992/1993 ENSO (1989～1993) than the 4 years including 1982/1983 ENSO (1980～1983); (2) The spatial variability indicates that the area with the highest lag correlation among the grids moves in an anti-clockwise circle in the northern tropical Pacific Ocean within 4 years period and in a clockwise circle in the southern tropical Pacific Ocean. This result provides scientific evidence for the quasi - cycle theory of El Nino events. |
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| Keywords: | Heat content ENSO tropical Pacific Ocean |
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