globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-12-00297.1
Scopus记录号: 2-s2.0-84883144316
论文题名:
Impact of rossby wave breaking on U.S. west coast winter precipitation during ENSO events
作者: Ryoo J.-M.; Kaspi Y.; Waugh D.W.; Kiladis G.N.; Waliser D.E.; Fetzer E.J.; Kim J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期:17
起始页码: 6360
结束页码: 6382
语种: 英语
Scopus关键词: Integrated water vapors ; Meteorological fields ; Moist static energy ; Moisture transport ; Potential vorticity ; Water vapor transport ; Western United States ; Winter precipitation ; Dynamic response ; Mechanical waves ; Moisture ; Oceanography ; Storms ; Tropics ; Water vapor ; Nickel ; anticyclone ; atmospheric moisture ; atmospheric transport ; El Nino ; El Nino-Southern Oscillation ; energy flux ; jet ; La Nina ; moisture transfer ; potential vorticity ; precipitation (climatology) ; Rossby wave ; trajectory ; water vapor ; wave breaking ; Pacific Coast [North America] ; Pacific Coast [United States] ; United States
英文摘要: This study demonstrates that water vapor transport and precipitation are largely modulated by the intensity of the subtropical jet, transient eddies, and the location of wave breaking events during the different phases of ENSO. Clear differences are found in the potential vorticity (PV), meteorological fields, and trajectory pathways between the two different phases. Rossby wave breaking events have cyclonic and anticyclonic regimes, with associated differences in the frequency of occurrence and the dynamic response. During La Ni~na, there is a relatively weak subtropical jet allowing PV to intrude into lower latitudes over the western United States. This induces a large amount of moisture transport inland ahead of the PV intrusions, as well as northward transport to the west of a surface anticyclone. During El Ni~no, the subtropical jet is relatively strong and is associated with an enhanced cyclonic wave breaking. This is accompanied by a time-mean surface cyclone, which brings zonal moisture transport to the western United States. In both (El Ni~no and La Nĩna) phases, there is a high correlation (0.3-0.7) between upper-level PV at 250 hPa and precipitation over the west coast of the United States with a time lag of 0-1 days. Vertically integrated water vapor fluxes during El Nĩno areup to 70kgm-1s-1larger than those during La Nĩna along the west coast of the United States. The zonal and meridional moist static energy flux resembles wave vapor transport patterns, suggesting that they are closely controlled by the large-scale flows and location of wave breaking events during the different phase of ENSO. © 2013 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51699
Appears in Collections:气候变化事实与影响

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作者单位: Department of Earth and Planetary Sciences, University of California, Berkeley,CA, United States; Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot, Israel; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimorem,MD, United States; Physical Sciences Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States; Jet Propulsion Laboratory, California Institute of Technology, Department of Atmospheric and Oceanic Sciences, Pasadena and Joint Institute for Regional Earth System Science and Engineering, Los Angeles,CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena,CA, United States; Joint Institute for Regional Earth System Science and Engineering, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles,CA, United States

Recommended Citation:
Ryoo J.-M.,Kaspi Y.,Waugh D.W.,et al. Impact of rossby wave breaking on U.S. west coast winter precipitation during ENSO events[J]. Journal of Climate,2013-01-01,26(17)
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