Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0840.1 |
Examining Southern Ocean Cloud Controlling Factors on Daily Time Scales and Their Connections to Midlatitude Weather Systems | |
Kelleher, Mitchell K.; Grise, Kevin M. | |
2019-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:16页码:5145-5160 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Clouds and their associated radiative effects are a large source of uncertainty in global climate models. One region with particularly large model biases in shortwave cloud radiative effects (CRE) is the Southern Ocean. Previous research has shown that many dynamical "cloud controlling factors" influence shortwave CRE on monthly time scales and that two important cloud controlling factors over the Southern Ocean are midtropospheric vertical velocity and estimated inversion strength (EIS). Model errors may thus arise from biases in representing cloud controlling factors (atmospheric dynamics) or in representing how clouds respond to those cloud controlling factors (cloud parameterizations), or some combination thereof. This study extends previous work by examining cloud controlling factors over the Southern Ocean on daily time scales in both observations and global climate models. This allows the cloud controlling factors to be examined in the context of transient weather systems. Composites of EIS and midtropospheric vertical velocity are constructed around extratropical cyclones and anticyclones to examine how the different dynamical cloud controlling factors influence shortwave CRE around midlatitude weather systems and to assess how models compare to observations. On average, models tend to produce a realistic cyclone and anticyclone, when compared to observations, in terms of the dynamical cloud controlling factors. The difference between observations and models instead lies in how the models' shortwave CRE respond to the dynamics. In particular, the models' shortwave CRE are too sensitive to perturbations in midtropospheric vertical velocity and, thus, they tend to produce clouds that excessively brighten in the frontal region of the cyclone and excessively dim in the center of the anticyclone. |
英文关键词 | Southern Ocean Anticyclones Extratropical cyclones Clouds Cloud radiative effects |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000476762600002 |
WOS关键词 | OPTICAL DEPTH FEEDBACK ; OBSERVATIONAL CONSTRAINTS ; INSTANTANEOUS LINKAGES ; NORTH PACIFIC ; ERA-INTERIM ; CLIMATE ; SATELLITE ; PHASE ; RADIATION ; BIASES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/185732 |
专题 | 气候变化 |
作者单位 | Univ Virginia, Dept Environm Sci, Clark Hall, Charlottesville, VA 22903 USA |
推荐引用方式 GB/T 7714 | Kelleher, Mitchell K.,Grise, Kevin M.. Examining Southern Ocean Cloud Controlling Factors on Daily Time Scales and Their Connections to Midlatitude Weather Systems[J]. JOURNAL OF CLIMATE,2019,32(16):5145-5160. |
APA | Kelleher, Mitchell K.,&Grise, Kevin M..(2019).Examining Southern Ocean Cloud Controlling Factors on Daily Time Scales and Their Connections to Midlatitude Weather Systems.JOURNAL OF CLIMATE,32(16),5145-5160. |
MLA | Kelleher, Mitchell K.,et al."Examining Southern Ocean Cloud Controlling Factors on Daily Time Scales and Their Connections to Midlatitude Weather Systems".JOURNAL OF CLIMATE 32.16(2019):5145-5160. |
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