气候变化领域集成服务门户(CCPortal): Case study on the influence of synoptic-scale processes on the pairedH(2)O-O(3 )distribution in the UTLS across a North Atlantic jetstream

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DOI	10.5194/acp-23-999-2023
	Case study on the influence of synoptic-scale processes on the pairedH(2)O-O(3 )distribution in the UTLS across a North Atlantic jetstream
	Schaefler, Andreas; Sprenger, Michael; Wernli, Heini; Fix, Andreas; Wirth, Martin
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	999
结束页码	1018
卷号	23 期号:2 页码:20
英文摘要	During a research flight of the Wave-driven ISentropic Exchange (WISE) campaign, which was conducted over the eastern North Atlantic on 1 October 2017, the composition of the upper troposphere and lower stratosphere (UTLS) across the North Atlantic jet stream was observed by airborne, range-resolved differential absorption lidar (DIAL) profiles. We investigate how the high variability in the paired H2O and O-3 distribution along the two-dimensional lidar cross section is affected by synoptic-scale weather systems, as revealed by the Lagrangian history of the observed air masses. To this aim, the lidar observations are combined with 10 d backward trajectories along which meteorological parameters and derived turbulence diagnostics are traced. The transport and mixing characteristics are then projected to the vertical cross sections of the lidar measurements and to the H2O-O-3 phase space to explore linkages with the evolution of synoptic-scale weather systems and their interaction. Tropical, midlatitude, and arctic weather systems in the region of the jet stream and the related transport and mixing explain the complex H2O and O3 distribution to a large extent: O-3-rich stratospheric air from the high Arctic interacts with midlatitude air from the North Pacific in a northward-deflected jet stream associated with an anticyclone over the US and forms a filament extending into the tropopause fold beneath the jet stream. In the troposphere, lifting related to convection in the intertropical convergence zone (ITCZ) and two tropical cyclones that continuously injected H2O into dry descending air from the tropical Atlantic and Pacific form filamentary H2O structures. One tropical cyclone that transitioned into a midlatitude cyclone lifted moist boundary layer air, explaining the highest tropospheric H2O values. During the two days before the observations, the air with mixed tropospheric and stratospheric characteristics experienced frequent turbulence along the North Atlantic jet stream, indicating a strong influence of turbulence on the formation of the extratropical transition layer (ExTL). This investigation highlights the complexity of stirring and mixing processes and their close connection to interacting tropospheric weather systems from the tropics to the polar regions, which strongly influenced the observed fine-scale H2O and O-3 distributions. The identified non-local character of mixing should be kept in mind when interpreting mixing lines in tracer-tracer phase space diagrams.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000918798000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273667
作者单位	Helmholtz Association; German Aerospace Centre (DLR); Swiss Federal Institutes of Technology Domain; ETH Zurich
推荐引用方式 GB/T 7714	Schaefler, Andreas,Sprenger, Michael,Wernli, Heini,et al. Case study on the influence of synoptic-scale processes on the pairedH(2)O-O(3 )distribution in the UTLS across a North Atlantic jetstream[J],2023,23(2):20.
APA	Schaefler, Andreas,Sprenger, Michael,Wernli, Heini,Fix, Andreas,&Wirth, Martin.(2023).Case study on the influence of synoptic-scale processes on the pairedH(2)O-O(3 )distribution in the UTLS across a North Atlantic jetstream.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),20.
MLA	Schaefler, Andreas,et al."Case study on the influence of synoptic-scale processes on the pairedH(2)O-O(3 )distribution in the UTLS across a North Atlantic jetstream".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):20.