气候变化领域集成服务门户(CCPortal): A Factor Separation Study of the Effect of Synoptic-Scale Wind, Atmospheric Moisture and of Their Synergy on the Diurnal Temperature Range During the Israeli Summer

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DOI	10.1029/2021JD034923
	A Factor Separation Study of the Effect of Synoptic-Scale Wind, Atmospheric Moisture and of Their Synergy on the Diurnal Temperature Range During the Israeli Summer
	Rotstein M.; Alpert P.; Rostkier-Edelstein D.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	The trend of the decrease in the global average diurnal temperature range (DTR) is one of the clearest signals in twentieth century climate data. Regionally, DTR trends exhibit large variations. A factor separation analysis was conducted to investigate the impact of atmospheric moisture, synoptic-scale winds, and their synergy on the DTR during the Israeli summer. The Weather Research and Forecasting (WRF) Single Column Model was run for summer representative days, at four locations in Israel. In almost all cases, the contribution of the factors and of their synergy to the DTR was dominated by their contribution to the diurnal minimum temperature, Tmin. The largest contribution resulted from atmospheric moisture, reducing the DTR. The contribution of synoptic-scale winds showed more variability, with significant differences in both magnitude and sign on different days. The sign of the effect on Tmin depended on the relative direction and magnitude of the nocturnal synoptic-scale wind with respect to the local wind, which in turn determined the effect on the low-level jet (LLJ) and vertical mixing. The contribution from synergy between the two factors depended on the effect of moisture on the LLJ and on the effect of the synoptic-scale winds on moisture advection in or out of the atmospheric column. All cases were classified into groups depending on the sign of contributions of the single factors and of their synergy when analyzing the DTR observed trends. These results highlight the importance of the synoptic wind, of its synergy with atmospheric moisture and of the feedback mechanisms. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric moisture; diurnal temperature range; factor separation; synergy; synoptic wind; WRF single column model
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237020
作者单位	Department of Geophysics, Porter School of the Environment and Earth Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel; Department of Environmental Physics, Environmental Sciences Division, Israel Institute for Biological Research, Ness-Ziona, Israel; Fredy and Nadine Herrmann Institute of Earth Sciences, the Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, Israel
推荐引用方式 GB/T 7714	Rotstein M.,Alpert P.,Rostkier-Edelstein D.. A Factor Separation Study of the Effect of Synoptic-Scale Wind, Atmospheric Moisture and of Their Synergy on the Diurnal Temperature Range During the Israeli Summer[J],2021,126(17).
APA	Rotstein M.,Alpert P.,&Rostkier-Edelstein D..(2021).A Factor Separation Study of the Effect of Synoptic-Scale Wind, Atmospheric Moisture and of Their Synergy on the Diurnal Temperature Range During the Israeli Summer.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Rotstein M.,et al."A Factor Separation Study of the Effect of Synoptic-Scale Wind, Atmospheric Moisture and of Their Synergy on the Diurnal Temperature Range During the Israeli Summer".Journal of Geophysical Research: Atmospheres 126.17(2021).