GSTDTAP  > 地球科学
DOI10.1175/JAS-D-17-0204.1
Quantifying Isentropic Mixing Linked to Rossby Wave Breaking in a Modified Lagrangian Coordinate
Liu, Chengji; Barnes, Elizabeth A.
2018-03-01
发表期刊JOURNAL OF THE ATMOSPHERIC SCIENCES
ISSN0022-4928
EISSN1520-0469
出版年2018
卷号75期号:3页码:927-942
文章类型Article
语种英语
国家USA
英文摘要

Isentropic mixing is an important process for the distribution of chemical constituents in the mid-to high latitudes. A modified Lagrangian framework is applied to quantify the mixing associated with two distinct types of Rossby wave breaking (i.e., cyclonic and anticyclonic). In idealized numerical simulations, cyclonic wave breaking (CWB) exhibits either comparable or stronger mixing than anticyclonic wave breaking (AWB). Although the frequencies of AWB and CWB both have robust relationships with the jet position, this asymmetry leads to CWB dominating mixing variability related to the jet shifting. In particular, when the jet shifts poleward the mixing strength decreases in areas of the midlatitude troposphere and also decreases on the poleward side of the jet. This is due to decreasing CWB occurrence with a poleward shift of the jet. Across the tropopause, equatorward of the jet, where AWB mostly occurs and CWB rarely occurs, the mixing strength increases as AWB occurs more frequently with a poleward shift of the jet. The dynamical relationship above is expected to be relevant both for internal climate variability, such as the El Nino-Southern Oscillation (ENSO) and the annular modes, and for future climate change that may drive changes in the jet position.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000429576900013
WOS关键词STRATOSPHERE-TROPOSPHERE EXCHANGE ; WARM CONVEYOR BELTS ; GENERAL-CIRCULATION ; POTENTIAL VORTICITY ; EFFECTIVE DIFFUSIVITY ; CLIMATE-CHANGE ; EL-NINO ; TRANSPORT ; OSCILLATION ; OZONE
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/29766
专题地球科学
作者单位Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA
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Liu, Chengji,Barnes, Elizabeth A.. Quantifying Isentropic Mixing Linked to Rossby Wave Breaking in a Modified Lagrangian Coordinate[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(3):927-942.
APA Liu, Chengji,&Barnes, Elizabeth A..(2018).Quantifying Isentropic Mixing Linked to Rossby Wave Breaking in a Modified Lagrangian Coordinate.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(3),927-942.
MLA Liu, Chengji,et al."Quantifying Isentropic Mixing Linked to Rossby Wave Breaking in a Modified Lagrangian Coordinate".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.3(2018):927-942.
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