赤道太平洋海域对C02加倍的敏感性试验*

南京大学学报(自然科学版) ›› 2011, Vol. 47 ›› Issue (6): 670–678.

赤道太平洋海域对C02加倍的敏感性试验*

胡海波^1,2，张媛²，于亮¹

出版日期:2015-05-07 发布日期:2015-05-07
作者简介: (1.南京大学大气科学学院，灾害性天气气候研究所，南京，210093;
2.南京信息工程大学大气科学学院，南京，210093)
基金资助:
国家自然科学基金(40906005, 41106021, 41175053)，国家重大基础研究计划(2010CB408504, 2012CB956002),
国家科技支撑项日(2009BAC51B01)，行业专项(GYHY201106017,GYHY201206038)，江苏高校优势学科建设工程资助项日

The sensitivity experiments of CO₂doubling in the tropical Pacific

Hu Hai-Bo¹，Zhang Yuau²,Yu Liang¹

Online:2015-05-07 Published:2015-05-07
About author:(1 .School of Atmospheric Sciences, Nanjing University, Nanjing, 210093，China;2. School of
Atmospheric Sciences，Nanjing University of Information Science and Technology, Nanjing, 210093，China)

摘要/Abstract

摘要： 摘要:利用Fast Ocean-Atmosphere Model (FOAM)海气祸合模式，分析了CO₂加倍后热带太平洋海气系统的变化趋势并进行了机制研究.结果表明，CO₂加倍后，模式中整个赤道海域海洋表面温度升
高，但赤道西太平洋海面温度的增幅要强于东赤道太平洋的现象.产生这种增暖趋势的主要原因是由于热带区域160ºF以东海面东风的增强及东赤道次表层海洋冷水上翻的增强，使得赤道太平洋东部海域
上层海洋增暖减缓.CO₂增加后，模式中Nino事件的演变过程与控制试验相似，但La Nina事件的演变在两个试验中有明显区别:CO₂加倍试验中La Nina事件的冷海温异常强度更强、维持时间更久，且Fl
Nino-Southern Oscillation circulation (FNSO)事件的周期也有所增长.ENS0周期的改变是由于模式中CO₂浓度增加后，热带与热带外热容量交换的减小，使得热带海域热容量的充放电速度减慢，根据“充放
电理论”，FNSO事件周期将拉长.

Abstract: By using a fully coupled model，the atmosphere and ocean coupled fields in the tropical Pacific have been analyzed from the double CO₂experiment，in view of the change of the trend as well as its associated mechanism, It
is shown that results from the coupled model share the similar characteristics with those from observation, in which sea surface temperatures (STT)increase over the whole tropical Pacific and have greater amplitudes in the west than
that in the eastern part.This pattern may be mainly due to the enhanced trade wind and cold upwclling close to the eastern coast of tropical Pacific, which undermine the SST increasing in the eastern Pacific. In the control and
double CO₂experiments，evolvements arc similar in the Nino events but different in the La Nina events. Compared with the control experiments，the La Nina events arc featured with more strongly cold SST，longer lasting span and
greater El Nino-Southern Oscillation circulation(ENSO) period in the double CO₂ experiments. Here, the greater ENSO period can be interpreted by the“charge theory". From this theory, the exchange of the anomalous heat
content will be reduced between tropics and extrx-tropics with increasing CO₂ in this model，which is apt to decelerate the charge rate of heat content in the tropics, therefore, the ENSO period will be prolonged.

胡海波^1,2，张媛²，于亮¹
. 赤道太平洋海域对C02加倍的敏感性试验*
[J]. 南京大学学报(自然科学版), 2011, 47(6): 670–678.

Hu Hai-Bo¹，Zhang Yuau²,Yu Liang¹
. The sensitivity experiments of CO₂doubling in the tropical Pacific
[J]. Journal of Nanjing University(Natural Sciences), 2011, 47(6): 670–678.

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