The Thermocline Biases in the Tropical North Pacific and Their Attributions
文献类型：期刊论文
| 作者 | Zhu, Yuchao5,6,7 ; Zhang, Rong-Hua3,4,5,6,7; Li, Delei5,6,7; Chen, Dake1,2
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| 刊名 | JOURNAL OF CLIMATE
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| 出版日期 | 2021-03-01 |
| 卷号 | 34期号:5页码:1635-1648 |
| 关键词 | Climate models Model errors Model evaluation/performance |
| ISSN号 | 0894-8755 |
| DOI | 10.1175/JCLI-D-20-0675.1 |
| 通讯作者 | Zhang, Rong-Hua(rzhang@qdio.ac.cn) |
| 英文摘要 | The tropical thermocline plays an important role in regulating equatorial sea surface temperature (SST); at present, it is still poorly simulated in the state-of-the-art climate models. In this paper, thermocline biases in the tropical North Pacific are investigated using the newly released CMIP6 historical simulations. It is found that CMIP6 models tend to produce an overly shallow thermocline in the northwestern tropics, accompanied by a deep thermocline in the northeastern tropics. A pronounced thermocline strength bias arises in the tropical northeastern Pacific, demonstrating a dipole structure with a sign change at about 8 degrees N. These thermocline biases are accompanied with biases in the simulations of oceanic circulations, including a too weak North Equatorial Countercurrent (NECC), a reduction in water exchanges between the subtropics and the equatorial regions, and an eastward extension of the equatorward interior water transport. The causes of these thermocline biases are further analyzed. The thermocline bias is primarily caused by the model deficiency in simulating the surface wind stress curl, which can be further attributed to the longstanding double-ITCZ bias in the tropical North Pacific. Besides, thermocline strength bias can be partly attributed to the poor prescription of oceanic background diffusivity. By constraining the diffusivity to match observations, the thermocline strength in the tropical northeastern Pacific is greatly increased. |
| 资助项目 | National Natural Science Foundation of China[41906007] ; National Natural Science Foundation of China[41690122(41690120)] ; National Natural Science Foundation of China[41705082] ; National Natural Science Foundation of China[41421005] ; National Key Research and Development Program of China[2017YFC1404102(2017YFC1404100)] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 40000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 42000000] ; Shandong Taishan Scholarship ; Earth System Grid Federation (ESGF) |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000615495000005 |
| 出版者 | AMER METEOROLOGICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/169751]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Zhang, Rong-Hua |
| 作者单位 | 1.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 6.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Yuchao,Zhang, Rong-Hua,Li, Delei,et al. The Thermocline Biases in the Tropical North Pacific and Their Attributions[J]. JOURNAL OF CLIMATE,2021,34(5):1635-1648. |
| APA | Zhu, Yuchao,Zhang, Rong-Hua,Li, Delei,&Chen, Dake.(2021).The Thermocline Biases in the Tropical North Pacific and Their Attributions.JOURNAL OF CLIMATE,34(5),1635-1648. |
| MLA | Zhu, Yuchao,et al."The Thermocline Biases in the Tropical North Pacific and Their Attributions".JOURNAL OF CLIMATE 34.5(2021):1635-1648. |
入库方式： OAI收割
来源：海洋研究所
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