Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078974 |
Testing Latitudinally Dependent Explanations of the Circulation Response to Increased CO2 Using Aquaplanet Models | |
Shaw, Tiffany A.; Tan, Zhihong | |
2018-09-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:18页码:9861-9869 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The atmospheric circulation exhibits robust responses to increased CO2 that emerge across the climate model hierarchy. Existing theoretical explanations of the circulation response can be grouped according to latitude. Here we test latitudinally dependent explanations of the circulation response to increased CO2 using slab ocean aquaplanet models with latitudinally dependent CO2 concentration. Quadrupling CO2 in the tropics (0-20 degrees) accounts for the strengthening and upward shift of the subtropical jet but does not account for the poleward shift of the Hadley cell edge or extratropical circulation. The tropical response is dominated by regions of descent. When CO2 is quadrupled in high latitudes (60-90 degrees), there is a negligible circulation response. The response to latitudinally dependent increased CO2 is mostly linear and increased CO2 in the midlatitudes (20-60 degrees) dominates. Within the midlatitudes, the subtropics (20-40 degrees) dominate. Thus, story lines explaining the circulation shift in response to increased CO2 should focus on the thermodynamic response in the subtropics. Plain Language Summary The atmospheric circulation controls the regional response to global warming. There are several robust responses to global warming according to state-of-the-art climate models: (1) the subtropical jet will strengthen and shift upward and (2) the Hadley cell edge, storm tracks, and jet stream will shift poleward. In contrast to the thermodynamic response to climate change, which includes warming of the troposphere, cooling of the stratosphere, warming aloft in the tropics, and Arctic amplification at the surface, robust physically based story lines of the circulation response are lacking. The lack of robust story lines occurs in part because there are many explanations put forward in the literature to explain the circulation response, which have not been properly compared. Here we test latitudinally dependent explanations of the circulation response to increased CO2 using idealized simulations with latitudinally dependent CO2 concentration. The results show that increased CO2 in the tropics accounts for the strengthening and upward shift of the subtropical jet and increased CO2 in midlatitudes accounts for the poleward shift of the Hadley cell edge, storm track, and jet stream. Within the midlatitudes the subtropics dominate. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447761300058 |
WOS关键词 | STORM-TRACK SHIFTS ; RADIATIVE CHANGES ; STATIC STABILITY ; THERMAL FORCINGS ; CLIMATE-CHANGE ; ENERGY BUDGET ; JET-STREAM ; AMPLIFICATION ; FEEDBACKS ; EDDIES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27613 |
专题 | 气候变化 |
作者单位 | Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA |
推荐引用方式 GB/T 7714 | Shaw, Tiffany A.,Tan, Zhihong. Testing Latitudinally Dependent Explanations of the Circulation Response to Increased CO2 Using Aquaplanet Models[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(18):9861-9869. |
APA | Shaw, Tiffany A.,&Tan, Zhihong.(2018).Testing Latitudinally Dependent Explanations of the Circulation Response to Increased CO2 Using Aquaplanet Models.GEOPHYSICAL RESEARCH LETTERS,45(18),9861-9869. |
MLA | Shaw, Tiffany A.,et al."Testing Latitudinally Dependent Explanations of the Circulation Response to Increased CO2 Using Aquaplanet Models".GEOPHYSICAL RESEARCH LETTERS 45.18(2018):9861-9869. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论