DJF JJA - SSEC, UW-Madisoncimss.ssec.wisc.edu/iwwg/iww11/talks/Session6_Garay.pdfDJF (Ocean Only)...
Transcript of DJF JJA - SSEC, UW-Madisoncimss.ssec.wisc.edu/iwwg/iww11/talks/Session6_Garay.pdfDJF (Ocean Only)...
-
NCEP-2/MISR Zonal Mean Winds 2001-2007
1
DJF JJA
-
NCEP-2/MISR Zonal Mean Winds 2001-2007
2
-
NCEP-2/MISR Zonal Mean Winds 2001-2007
3
Note: This is a comparison of climatologies, so observa7ons are not spa7ally/temporally
matched.
-
NCEP-2/MISR Zonal Mean Winds 2001-2007
4
Both loca7on and magnitude of
westerlies & easterlies in good agreement
-
NCEP-2/MISR Zonal Mean Winds 2001-2007
5
Differences in loca7on and magnitude of near-‐surface
westerlies in southern hemisphere (not well-‐constrained in reanalysis)
-
6 -21 +14 +21 -14 -7 +7 0
MISR Tropical Meridional Winds 2001-2007 DJF
(Ocean Only)
-
MISR Tropical Meridional Winds 2001-2007
7 -21 +14 +21 -14 -7 +7 0
Hadley Circula7on is clearly evident in this
season
DJF (Ocean Only)
-
8
Frequency of Wind Speeds > 20 m/s Over Land
Low High
Height ≤ 5 km AGL
-
9
Frequency of Wind Speeds > 20 m/s Over Land
Low High
Height ≤ 5 km AGL
-
2 2
3
2
3
2 2
4
2 2 2
3 5 5 4
2 19 15
8
5 8 4 2
13 15
7 3
9 8 6
2 2
10°N
20°N
30°N
15°N
25°N
35°N
10°W 0°E 10°E 20°E 30°E 5°W 5°E 15°E 25°E 35°E
Bodélé Depression
Ténéré Desert Western
Sahara Desert
Algeria
Mauritania
Mali
Niger Chad
Libya
Sudan
Nigeria
Qattara Depression
Selima Sand Sheet
Egypt
Mediterranean Sea
Sahara Desert
Frequency of Wind Speeds Greater than 20 m/s over Africa (DJF)
10
-
11
Hand Digitized Case using MINX Software
-
12
Hand Digitized Case using MINX Software
Wind corrected heights ~ 700m Surface al7tude
Zero wind heights apparently below surface
Wind speed ~18 m/s
-
Analysis of 476 MISR dust plumes from the Bodélé Depression in Chad. Wind
speeds decrease and histogram becomes broader with distance from the dust source where low level jet is funneled
between two mountain ranges
-
Winds diverge away from Bodélé Depression
(funneling between mountains)
-
High-Resolution Cross-Track Winds
15
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
16
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
17
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
18
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
19
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
20
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
21
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
22
Hurricane Ida 11/08/2009
-
High-Resolution Cross-Track Winds
23
Hurricane Ida 11/08/2009
-
10 m/s
40 km
High-Resolution Cross-Track Winds
15 km Altitude
12 km Altitude
24
Hurricane Ida 11/08/2009
Size of feature and large divergence at cloud top suggest the presence of a vortical hot
tower in the eyewall of the hurricane
-
Hurricane Ida – 2009 in situ Comparison
25 25
Aircraft Track
-
Hurricane Ida – 2009 in situ Comparison
26 26
Aircraft Track
-
Hurricane Ida – 2009 in situ Comparison
27 27
Altitude
Wind Speed
MISR
Aircraft
MISR
Aircraft
-
Hurricane Ida – 2009 in situ Comparison
28 28
Altitude
Wind Speed
MISR
Aircraft
MISR
Aircraft
Disagreement where heights disagree
Agreement within ≤ 4 m/s
-
Stratocumulus Cloud-Top Divergence
29
MISR Orbit 47143, Path 11, Blocks 100-101 28 October 2008
-
Stratocumulus Cloud-Top Divergence
30 -20
-16
-12
-8
-4
0
+4
+8
+12
+16
+20
Linear Convergence 1x10-5 s-1
CON
DIV
-
Stratocumulus Cloud-Top Divergence
31 -20
-16
-12
-8
-4
0
+4
+8
+12
+16
+20
Linear Convergence 1x10-5 s-1
CON
DIV
Divergence
Convergence
-
32 32
Summary n MISR Details
n Data from February 2000 to present
n Polar orbit, 10:30 a.m. equator crossing (descending)
n 400 km swath width
n 9 cameras at fixed viewing angles (±70.4°, ±60°, ±45.6°, ±26.1°, 0°)
n 275 m resolution red band (all bands nadir)
n 1.1 km resolution other bands off nadir
n Current Cloud Products
n Cloud-top heights 1.1 km horizontal, 500 m vertical
n Cloud motion vectors 70.4 km horizontal, 500 m vertical
n New Cloud Products (Currently Testing)
n Cloud-top heights 1.1 km horizontal, < 500 m vertical
n Cross-track cloud motion 1.1 km horizontal, < 500 m vertical
n Cloud motion vectors 17.6 km horizontal, < 550 m vertical
Contact: [email protected]