Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/joc.2297 |
On the importance of synoptic classification methods with respect to environmental phenomena | |
Dayan, Uri1; Tubi, Amit1; Levy, Ilan2 | |
通讯作者 | Tubi, Amit |
来源期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
出版年 | 2012 |
卷号 | 32期号:5页码:681-694 |
英文摘要 | One of the most important goals of synoptic climatology is to analyse the relationships between atmospheric circulation and surface environmental conditions. Since manual (subjective) classification might reflect differently environmental phenomena as compared to computer assisted (semi-objective) classification, a comparison between both classifications was performed for the Eastern Mediterranean (EM) for 10 years. The overall frequencies of the 19 recurring synoptic types characterising the circulation regime over the EM are similar for both methods (correlation coefficient = 0.96, p-value < 0.0001). Nevertheless, comparing the classifications on a day-to-day basis for the three most common types showed a large degree of disagreement between the two. For synoptic types with a deep horizontal pressure gradient both classifications yielded the highest agreement (over 50%), improving the consistency between both classifications. Yarnal’s (1993) ’environment-to-circulation’ approach was tested on three surface environment processes: air pollutants, desert dust intrusions, and flash floods. Our results indicate that the weak pressure gradients associated with high ozone levels make the classification more difficult for both methods. Regarding dust outbreaks, classifications point on the importance of the cold cyclone location rather than its pressure gradient. As for flash floods, the flow pattern at the surface level is insufficient to predict atmospheric conditions prone for their occurrence, suggesting that upper air data is an essential factor for determining such highly convective events. Finally, two new approaches to evaluate the quality of classifications are presented, demonstrated on two frequent circulation systems persisting over the EM. A qualitative approach compares the composite mean sea level pressure maps from each classification, while a quantitative approach compares the resultant winds at a central site. This study demonstrates that comparing different synoptic classification methodologies and different environmental applications can lead to additional and valuable insights on the interaction between the environment and synoptic-scale circulation. Copyright (C) 2011 Royal Meteorological Society |
英文关键词 | synoptic circulation manual classification computer assisted classification Eastern Mediterranean dust outbreaks tropospheric ozone flash floods circulation type classification |
类型 | Article |
语种 | 英语 |
国家 | Israel ; Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000302614200004 |
WOS关键词 | SCALE ATMOSPHERIC CIRCULATION ; SURFACE OZONE CONCENTRATIONS ; BRITISH-COLUMBIA ; MEDITERRANEAN BASIN ; AIR-POLLUTION ; NEGEV DESERT ; MAJOR FLOODS ; CLIMATOLOGY ; TRANSPORT ; ISRAEL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
来源机构 | Hebrew University of Jerusalem |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172929 |
作者单位 | 1.Hebrew Univ Jerusalem, Dept Geog, Jerusalem, Israel; 2.Environm Canada, Air Qual Res Div, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Dayan, Uri,Tubi, Amit,Levy, Ilan. On the importance of synoptic classification methods with respect to environmental phenomena[J]. Hebrew University of Jerusalem,2012,32(5):681-694. |
APA | Dayan, Uri,Tubi, Amit,&Levy, Ilan.(2012).On the importance of synoptic classification methods with respect to environmental phenomena.INTERNATIONAL JOURNAL OF CLIMATOLOGY,32(5),681-694. |
MLA | Dayan, Uri,et al."On the importance of synoptic classification methods with respect to environmental phenomena".INTERNATIONAL JOURNAL OF CLIMATOLOGY 32.5(2012):681-694. |
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