Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-4657-2018 |
Tropical convection regimes in climate models: evaluation with satellite observations | |
Steiner, Andrea K.1,2,3; Lackner, Bettina C.3; Ringer, Mark A.4 | |
2018-04-06 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:7页码:4657-4672 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; England |
英文摘要 | High-quality observations are powerful tools for the evaluation of climate models towards improvement and reduction of uncertainty. Particularly at low latitudes, the most uncertain aspect lies in the representation of moist convection and interaction with dynamics, where rising motion is tied to deep convection and sinking motion to dry regimes. Since humidity is closely coupled with temperature feedbacks in the tropical troposphere, a proper representation of this region is essential. Here we demonstrate the evaluation of atmospheric climate models with satellite-based observations from Global Positioning System (GPS) radio occultation (RO), which feature high vertical resolution and accuracy in the troposphere to lower stratosphere. We focus on the representation of the vertical atmospheric structure in tropical convection regimes, defined by high updraft velocity over warm surfaces, and investigate atmospheric temperature and humidity profiles. Results reveal that some models do not fully capture convection regions, particularly over land, and only partly represent strong vertical wind classes. Models show large biases in tropical mean temperature of more than 4K in the tropopause region and the lower stratosphere. Reasonable agreement with observations is given in mean specific humidity in the lower to mid-troposphere. In moist convection regions, models tend to underestimate moisture by 10 to 40% over oceans, whereas in dry downdraft regions they overestimate moisture by 100 %. Our findings provide evidence that RO observations are a unique source of information, with a range of further atmospheric variables to be exploited, for the evaluation and advancement of next-generation climate models. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429370500001 |
WOS关键词 | GPS RADIO OCCULTATION ; TROPOSPHERIC WATER-VAPOR ; ATMOSPHERIC CIRCULATION ; TROPOPAUSE PARAMETERS ; EARTHS ATMOSPHERE ; THERMAL STRUCTURE ; SYSTEM MODEL ; TEMPERATURE ; ASSIMILATION ; CHAMP |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/30359 |
专题 | 地球科学 |
作者单位 | 1.Karl Franzens Univ Graz, Wegener Ctr Climate & Global Change WEGC, Graz, Austria; 2.Karl Franzens Univ Graz, Inst Phys, Inst Geophys Astrophys & Meteorol, Graz, Austria; 3.Karl Franzens Univ Graz, Doctoral Programme Climate Change, Graz, Austria; 4.Met Off Hadley Ctr, Exeter, Devon, England |
推荐引用方式 GB/T 7714 | Steiner, Andrea K.,Lackner, Bettina C.,Ringer, Mark A.. Tropical convection regimes in climate models: evaluation with satellite observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(7):4657-4672. |
APA | Steiner, Andrea K.,Lackner, Bettina C.,&Ringer, Mark A..(2018).Tropical convection regimes in climate models: evaluation with satellite observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(7),4657-4672. |
MLA | Steiner, Andrea K.,et al."Tropical convection regimes in climate models: evaluation with satellite observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.7(2018):4657-4672. |
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