Downstream Evolution and Coastal-to-Inland Transition of Landfalling Lake-Effect Systems
Downstream Evolution and Coastal-to-Inland Transition of Landfalling Lake-Effect Systems
复制标题
登陆湖泊效应系统的下游演化和沿海到内陆的转变
DOI:
10.1175/mwr-d-20-0253.1
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发表时间:
2021
影响因子:
3.2
通讯作者:
Minder, Justin R.
中科院分区:
文献类型:
--
作者:
Gowan, Thomas M.;Steenburgh, W. James;Minder, Justin R.
The distribution and intensity of lake- and sea-effect (hereafter lake-effect) precipitation are strongly influenced by the mode of landfalling lake-effect systems. Here, we used idealized large-eddy simulations to investigate the downstream evolution and coastal-to-inland transition of two lake-effect modes: 1) a long-lake-axis-parallel (LLAP) band generated by an oval body of water (hereafter lake; e.g., Lake Ontario) and 2) broad-coverage, open-cell convection generated by an open lake (e.g., Sea of Japan). Under identical atmospheric conditions and lake-surface temperatures, the oval lake generates a LLAP band with heavy precipitation along the midlake axis, whereas the open lake generates broad-coverage, open-cell convection with widespread, light accumulations. Over the oval lake, the LLAP band features a thermally forced and diabatically enhanced cross-band secondary circulation with convergence and ascent over the midlake axis. Downstream of the lake, flanking airstreams that avoid lake modification merge beneath the band where they experience sublimational cooling, producing a cold pool. At the upstream edge of the cold pool, a coastal baroclinic zone forms. Above this zone, ascent and hydrometeor mass growth are maximized, resulting in an inland precipitation maximum due to subsequent hydrometeor transport and fallout. Over the open lake, individual open cells grow larger and stronger with overwater extent, but a convective-to-stratiform transition begins at the coast. Here, convective vigor decays, mesoscale ascent begins, and enhanced hydrometeor growth results in an inland precipitation maximum. These results highlight variations in the coastal-to-inland transition of lake-effect systems that ultimately influence the distribution and intensity of lake-effect precipitation.
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DOI:
10.1029/2018jd029586
发表时间:
2019
期刊:
Journal of Geophysical Research: Atmospheres
影响因子:
--
作者:
West, Tyler K.;Steenburgh, W. James;Mace, Gerald G.
通讯作者:
Mace, Gerald G.
影响因子:
8
作者:
W. J. Steenburgh;T. Alcott
通讯作者:
T. Alcott
影响因子:
2.9
作者:
Eipper, Daniel T.;Greybush, Steven J.;Young, George S.;Saslo, Seth;Sikora, Todd D.;Clark, Richard D.
通讯作者:
Clark, Richard D.
影响因子:
3.2
作者:
R. Braham;R. D. Kelly
通讯作者:
R. D. Kelly
影响因子:
3.2
作者:
Veals, Peter G.;Steenburgh, W. James;Campbell, Leah S.
通讯作者:
Campbell, Leah S.