環境的改變對颮線與地形交互作用的影響
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環環環環環環環環環環環環環環環環環環 Letkewicz, C. E., and M. D. Parker, 2011: Impact of environmental variations on simulated squall lines interacting with terrain. Mon. Wea. Rev., 139, 3163–3183. 姓姓 姓姓姓 ： 姓姓姓姓 姓姓姓 姓姓 ：
description
姓名：林昌鴻 指導教授：楊明仁 老師. 環境的改變對颮線與地形交互作用的影響. Letkewicz , C. E., and M. D. Parker, 2011: Impact of environmental variations on simulated squall lines interacting with terrain. Mon. Wea . Rev., 139 , 3163–3183. 大綱. 關鍵字 前言 研究方法 敏感度實驗 結果. Hydraulic jump ( 水躍 ). - PowerPoint PPT Presentation
Transcript of 環境的改變對颮線與地形交互作用的影響
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Letkewicz, C. E., and M. D. Parker, 2011: Impact of environmental variations on simulated squall lines interacting with terrain. Mon. Wea. Rev., 139, 31633183.
Hydraulic jump ()
3CAPE ()CAPEconvective available potential energy
CIN()CINconvective inhibition
540
crossersnoncrossers(40 dBZ5 ms-1)
FM06
FM066FM06Frame and Markowski 2006 (FM06)
7FM06MCS
81.14BryanCloud Model (CM1; Bryan and Fritsch 2002)
500 m150 m500 m
20 km-26 kmRayleigh damping layer
Y60 kmX600 km
Thompson et al. (2004)
Y10
FM06
4 K 0.1 K
14 g kg-1FM06 +4K0.1k11
h(x) H (1km)Xpa (50km)YY
(defined as 1 km in these simulations12
Qd2.5km13
2km612k
1411g kg-1
14FM0615surface simulated reflectivity
contour -2 K 16surface simulated reflectivity
contour -2 K 17
(K)
18
shaded: w (ms-1)
contoured: (k)A)B)C)D)E)F)19shaded: w (ms-1)contoured: (k)shaded: w (ms-1)contoured: (k)
shaded: U (ms-1)contoured: W (ms-1 )W (m/s)20()
dBZ w
dBZ w22
W CTL+ 5 m/s23
dBZ w24()25
dBZ w26RotunnoKlempWeisman (RKW) theory
CU
27
HBqv , qc ,qr
28RKWC/U = 1
CC/ U
29
Shear -5 m/s30
dBZ-5 m/s+5 m/s31
C/U
()33
-6 kCTLSBCAPE
825 J kg-11790 J kg-1
SBCIN
-150 J kg-1-20 J kg-1dBZ/W 34
-12 kCTLSBCAPE
0 J kg-11790 J kg-1
SBCIN
0 J kg-1-20 J kg-1dBZ/W 35
shaded: 36(Lee drying)37
38MCS
MCSMCS
MCS
MCS
THE ENDCAPE ()1.LCL 2. L.F.C.
1. 1PTd 2PT 2.LCL3.L.F.C.42CIN()L.C.L.L.C.L.L.F.C.
44MCS
-5 ms-1MCS
MCSMCS(cf. Figs. 2d,g,j)45
(K)W (m s-1)46
FM06(Kessler 1969)6(Figs.6a,b)e(Figs. 6c,d)e(Figs. 6e,f)Froude numbersFroude number47
