Evalua&on  of  Upgraded  MISR  Stereo  Mo&on  Vectors  Ákos  Horváth  ▪  Leibniz  Ins4tute  for  Tropospheric  Research,  Leipzig,  Germany  

11th  Interna4onal  Winds  Workshop  ▪  20-­‐24  February  2012,  Auckland,  New  Zeeland  

low-­‐res  70.4  km

 

hi-­‐res  17.6  km

 

MISR  Stereo  Mo4on  Vectors    

•  TC_STEREO    v.  F99_198  •  Paths  150  –  230  •  Wind  quality  ≥  3  

 MSG2    Cloud  Mo4on  Vectors  

 •  Visible  &  infrared  CMVs  •  Quality  Indicator  without  

first  guess  ≥  80    

•  1  year  of  data  (2008)  •  Dlat    and  Dlon  ≤  0.5°  •  D4me  ≤  15  min  •  Closest  in  height  •  225,155  wind  pairs  •  70.4-­‐km  MISR  SMVs  

Lonitz  and  Horváth,  JGR,  2011  

MISR  SMV  –  Meteosat-­‐9  CMV  Comparison  at  IWW10    

0

1

2

3

4

5

6

7

8

7.87

6.95

5.23

3.42

2.17

7.87

6.95

5.23

3.42

2.17

7.34

6.46

4.87

3.20

2.04

6.17

5.42

4.10

2.74

1.75

4.85

4.27

3.25

2.22

1.43

Num

ber of matched pairs (x1E

5)

0

1

2

3

4

5

6

7

8

7.87 7.87

7.34

6.17

4.85

7.87 7.87

7.34

6.17

4.85

7.63

7.63

7.11

5.98

4.70

6.75 6.75

6.30

5.30

4.16

4.34

4.34

4.05

3.41

2.69

Num

ber of matched pairs (x1E

5)

Dependence  on  QI  –  Number  of  Matches  MISR  low-­‐res  vs.  Meteosat-­‐9  

Dependence  on  QI  –  Number  of  Matches  MISR  highest-­‐quality  hi-­‐res  vs.  Meteosat-­‐9  

0

2

4

6

8

10

12

14

16

15.96

13.05

11.82

5.04

4.55

15.96

13.05

11.82

5.04

4.55

15.78

12.89

11.67

4.84

4.34

15.29

12.40

11.23

4.46

3.96

14.48

11.66

10.60

4.26

3.78

N-S w

ind RM

SD (m

/s)

0

2

4

6

8

10

12

14

16

7.76 7.76

7.32

6.83

6.18

7.76 7.76

7.32

6.83

6.18

7.63

7.63

7.22

6.72

6.03

7.52 7.52

7.07

6.54

5.80

7.37

7.37

6.94

6.32

5.53

N-S w

ind RM

SD (m

/s)

0

2

4

6

8

10

12

14

16

7.03 7.03

6.42

5.72 6.19

7.03 7.03

6.42

5.72 6.19

6.87

6.87

6.29

5.56 6.13

6.68 6.68

6.01

5.16 5.12

6.60

6.60

6.00

5.05

4.23

N-S w

ind RM

SD (m

/s)

Dependence  on  QI  –  N-­‐S  Wind  RMSD  MISR  highest-­‐quality  hi-­‐res  vs.  Meteosat-­‐9  

Dependence  on  QI  –  N-­‐S  Wind  RMSD  MISR  domain  mean  hi-­‐res  vs.  Meteosat-­‐9  

Dependence  on  QI  –  N-­‐S  Wind  RMSD  MISR  low-­‐res  vs.  Meteosat-­‐9  

Ver4cal  Varia4on  of  QI    

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0high-quality fraction

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

SMVlow-res QI * 3

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0high-quality fraction

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

SMVlow-res QI * 3

CMV QI * 80

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0high-quality fraction

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

SMVlow-res QI * 3

CMV QI * 80

SMVhi-res QI * 80

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2 >2-2 -1 0 1 2

E-W wind mean diff. (m/s)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2 >2-2 -1 0 1 2

N-S wind mean diff. (m/s)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-1.00 >0.00-1.00 -0.75 -0.50 -0.25 0.00

height mean diff. (km)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2.0 >2.0-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0

wind speed mean diff. (m/s)

Hi-­‐res  –  Low-­‐res  MISR  SMV  Differences    

N-­‐S  bias   low-­‐res   hi-­‐res  

all   -­‐1.12   -­‐0.03  ocean   -­‐1.05   0.04  land   -­‐1.71   -­‐0.62  

N-­‐S  rmsd   low-­‐res   hi-­‐res  

all   4.23   3.09  ocean   4.06   2.86  land   5.41   4.58  

N-­‐S  corr   low-­‐res   hi-­‐res  

all   0.84   0.89  ocean   0.85   0.91  land   0.74   0.78  

E-­‐W  bias   low-­‐res   hi-­‐res  

all   -­‐0.42   -­‐0.34  ocean   -­‐0.39   -­‐0.32  land   -­‐0.70   -­‐0.57  

E-­‐W  rmsd   low-­‐res   hi-­‐res  

all   2.50   2.77  ocean   2.43   2.72  land   3.03   3.13  

E-­‐W  corr   low-­‐res   hi-­‐res  

all   0.97   0.96  ocean   0.97   0.96  land   0.95   0.95  

No  significant  change  in  E-­‐W  comparison,  but  significant  improvement  in  N-­‐S  comparison  

SMV-­‐CMV  Comparison  –  Global  Mean  Sta4s4cs    

low-­‐res  MISR  hi-­‐res  MISR  

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2 >2-2 -1 0 1 2

N-S bias change (m/s)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2 >2-2 -1 0 1 2

speed bias change (m/s)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-0.6 >0.6-0.6 -0.3 0.0 0.3 0.6

height bias change (km)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-2 >2-2 -1 0 1 2

E-W bias change (m/s)

Change  in  SMV-­‐CMV  Mean  Difference  (‘Bias’)  hi-­‐res  –  low-­‐res  MISR  

height  bias  

low-­‐res   hi-­‐res  

all   443   188  

ocean   453   209  

land   358   12  

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60<-2 >2-2 -1 0 1 2

N-S rmsd change (m/s)

-60 -40 -20 0 20 40 60

-60 -40 -20 0 20 40 60

-60

-40

-20

020

4060

-60-40

-200

2040

60

<-20 >20-20 -10 0 10 20

N-S corr. change (%)

significant  reduc4on  in  rmsd  and  increase  in  correla4on  

Change  in  SMV-­‐CMV  N-­‐S  Wind  RMSD  and  Correla4on  hi-­‐res  –  low-­‐res  MISR  

MISR  N-­‐S  wind  bias  and  N-­‐S  wind  –  height  error  aliasing  are  clearly  visible  MISR  N-­‐S  wind  bias  and  error  palern  largely  disappear  

Distribu4on  of  SMV-­‐CMV  Vector  Differences  low-­‐res  MISR  

Distribu4on  of  SMV-­‐CMV  Vector  Differences  hi-­‐res  MISR  

Meridional  Varia4on  of  SMV-­‐CMV  Comparison  low-­‐level  clouds  (0-­‐3  km)  

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

Meridional  Varia4on  of  SMV-­‐CMV  Comparison  mid-­‐level  clouds  (3-­‐7  km)  

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

Meridional  Varia4on  of  SMV-­‐CMV  Comparison  high-­‐level  clouds  (>7  km)  

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

-60 -40 -20 0 20 40 60latitude (degree)

-7

-6

-5

-4

-3

-2

-1

0

1

mea

n w

ind

diffe

renc

e (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

1

3

5

7

9

11

13

15

win

d rm

sd (m

/s)

-60 -40 -20 0 20 40 60latitude (degree)

0.0

0.2

0.4

0.6

0.8

1.0

win

d co

rrela

tion

E-­‐W          N-­‐S  

low-­‐res  MISR   hi-­‐res  MISR  

MISR  Ground  Retrievals  –  Surface  Eleva4on  MISR  height  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<225 >1800225 450 675 900 1125 1350 1575 1800

MISR ground elevation retrieval (m)

MISR  Ground  Retrievals  –  Surface  Eleva4on  DEM  height  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<225 >1800225 450 675 900 1125 1350 1575 1800

DEM ground elevation (m)

MISR  Ground  Retrievals  –  Surface  Eleva4on  height  difference  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<-300 >300-300 -150 0 150 300

MISR-DEM ground elevation difference (m)

height  bias  =  -­‐19  m    height  rmsd  =  190  m  

MISR  Ground  Retrievals  –  Cross-­‐Swath  Bias  low-­‐res  data  

0 4 8 12 16 20 24 28 32MISRhi-res cross-swath domain index

-4

-3

-2

-1

0

1

MIS

R g

roun

d re

triev

al ’w

ind’

bia

s (m

/s)

-100

-50

0

50

100

150

200

MIS

R g

roun

d re

triev

al h

eigh

t bia

s (m

)

E-W N-S

height -90 * (N-S)

west east

1 2 3 4 5 6 7 8MISRlow-res cross-swath domain index

MISR  Ground  Retrievals  –  Cross-­‐Swath  Bias  hi-­‐res  data  

0 4 8 12 16 20 24 28 32MISRhi-res cross-swath domain index

-4

-3

-2

-1

0

1

MIS

R g

roun

d re

triev

al ’w

ind’

bia

s (m

/s)

-100

-50

0

50

100

150

200

MIS

R g

roun

d re

triev

al h

eigh

t bia

s (m

)

E-W N-S

height -90 * (N-S)

west east

1 2 3 4 5 6 7 8MISRlow-res cross-swath domain index

E-­‐Wlow-­‐res  bias  =  -­‐0.06  m/s    E-­‐Wlow-­‐res  sdev  =  0.70  m/s    

N-­‐Slow-­‐res  bias  =  -­‐0.13  m/s    N-­‐Slow-­‐res  sdev  =  1.95  m/s  

E-­‐Whi-­‐res  bias  =  -­‐0.14  m/s      E-­‐Whi-­‐res  sdev  =  0.61  m/s    

N-­‐Shi-­‐res  bias  =  +0.43  m/s      N-­‐Shi-­‐res  sdev  =  1.74  m/s  

SMV-­‐CMV  Comparison  –  Cross-­‐Swath  Bias  low-­‐res  MISR  

1 2 3 4 5 6 7 8MISRlow-res cross-swath domain index

-4

-3

-2

-1

0

1

SMV-

CM

V w

ind

diffe

renc

e (m

/s)

0

200

400

600

800

1000

SMV-

CM

V he

ight

diff

eren

ce (m

)

E-W N-S heightMISRlow-res

west east

SMV-­‐CMV  Comparison  –  Cross-­‐Swath  Bias  hi-­‐res  MISR  

1 2 3 4 5 6 7 8MISRlow-res cross-swath domain index

-4

-3

-2

-1

0

1

SMV-

CM

V w

ind

diffe

renc

e (m

/s)

0

200

400

600

800

1000

SMV-

CM

V he

ight

diff

eren

ce (m

)

E-W N-S heightMISRhi-res

west east

SMV-­‐CMV  Comparison  –  Cross-­‐Swath  Bias  hi-­‐res  MISR  -­‐  ground  bias  

1 2 3 4 5 6 7 8MISRlow-res cross-swath domain index

-4

-3

-2

-1

0

1

SMV-

CM

V w

ind

diffe

renc

e (m

/s)

0

200

400

600

800

1000

SMV-

CM

V he

ight

diff

eren

ce (m

)

E-W N-S heightMISRhi-res - ground bias

west east

0.5 0.6 0.7 0.8 0.9 1.0wind correlation

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

N-S corr.

E-W corr.

0.5 0.6 0.7 0.8 0.9 1.0wind correlation

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

N-S corr.

E-W corr.

large  increase  in  N-­‐S  wind  correla4on,  slight  decrease  in  E-­‐W  wind  correla4on  

SMV-­‐CMV  Comparison  –  Correla4on  Profiles  low-­‐res  MISR  

SMV-­‐CMV  Comparison  –  Correla4on  Profiles  hi-­‐res  MISR  

-15 -12 -9 -6 -3 0 3 6 9 12 15mean wind difference and rmsd (m/s)

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

E-W

N-Srmsd

mean diff.

-15 -12 -9 -6 -3 0 3 6 9 12 15mean wind difference and rmsd (m/s)

0

2

4

6

8

10

12

14

MIS

R S

MV

heig

ht (k

m)

E-W

N-Srmsd

mean diff.

large  decrease  in  N-­‐S  wind  mean  difference  and  rmsd    

SMV-­‐CMV  Comparison  –  Bias  and  RMSD  Profiles  low-­‐res  MISR  

SMV-­‐CMV  Comparison  –  Bias  and  RMSD  Profiles  hi-­‐res  MISR  

Lonitz  and  Horváth,  JGR,  2011  

MISR  SMV  –  Meteosat-­‐9  CMV  Height  Comparison    

MISR  Ground  Retrievals  –  Bias  Maps  hi-­‐res  E-­‐W  ‘wind’  bias  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<-2 >2-2 -1 0 1 2

E-W ground retrieval bias (m/s)

MISR  Ground  Retrievals  –  Bias  Maps  hi-­‐res  cross-­‐track  ‘wind’  bias  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<-0.50 >0.50-0.50 -0.25 0.00 0.25 0.50

cross-track ground retrieval bias (m/s)

MISR  Ground  Retrievals  –  Bias  Maps  hi-­‐res  N-­‐S  ‘wind’  bias  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<-2 >2-2 -1 0 1 2

N-S ground retrieval bias (m/s)

MISR  Ground  Retrievals  –  Bias  Maps  hi-­‐res  along-­‐track  ‘wind’  bias  

-150 -120 -90 -60 -30 0 30 60 90 120 150

-150 -120 -90 -60 -30 0 30 60 90 120 150-6

0-3

00

3060

-60-30

030

60

<-2 >2-2 -1 0 1 2

along-track ground retrieval bias (m/s)

-6 -4 -2 0 2 4 6MISR ground retrieval ’wind’ bias (m/s)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

6.5

DEM

gro

und

elev

atio

n (k

m)

(a)

-6 -4 -2 0 2 4 6MISR ground retrieval ’wind’ bias (m/s)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

6.5

MIS

R g

roun

d el

evat

ion

retri

eval

(km

)

(b)

MISR  Ground  Retrievals  –  Bias  Profile    

-6 -4 -2 0 2 4 6MISR ground retrieval ’wind’ bias (m/s)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

6.5

DEM

gro

und

elev

atio

n (k

m)

(a)

-6 -4 -2 0 2 4 6MISR ground retrieval ’wind’ bias (m/s)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

6.5

MIS

R g

roun

d el

evat

ion

retri

eval

(km

)

(b)

E-­‐Wlow-­‐res   N-­‐Slow-­‐res  

E-­‐Whi-­‐res   N-­‐Shi-­‐res  

Von  Kármán  Vortex  Street  Jan  Mayen  Island,  6  June  2001  

4.4-­‐km  wind  residuals  ater  mean  wind  removal  (K.  Mueller,  C.  Moroney)  

Von  Kármán  Vortex  Street  Jan  Mayen  Island,  6  June  2001