SATELLITE APPLICATIONS TO SEA STATE EVALUATION IN … · Cetraro Buoy 06:00 Cetraro Buoy 12:00...

46
SATELLITE APPLICATIONS TO SEA STATE EVALUATION IN ENCLOSED SEAS Pugliese Carratelli E., CUGRI and University of Salerno, [email protected] Chapron B., IFREMER, Brest, [email protected] Dentale F., University of Salerno, [email protected] Reale F., University of Salerno, [email protected] Spulsi G., CUGRI Salerno, Italy, [email protected] Palermo, October 7th 9th 2008

Transcript of SATELLITE APPLICATIONS TO SEA STATE EVALUATION IN … · Cetraro Buoy 06:00 Cetraro Buoy 12:00...

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Site wave climate analysis is based on

Global Weather Model archive data

(Local Area Model)

+

Wave Generation and Propagation Model

(Coastal Wave model)

+

Wave buoys, where available

Satellite altimeter

Altimeter data are now routinely assimilated into wave models

Altimeter/buoy (wind, waves) data calibration: 1988 (Monaldo)

Altimeter/Model comparison:

2006 ( Abdalla & Cavaleri)

(2007) (Ardhuin, Bertotti, Bidlot, Cavaleri, Filipetto, Lefevre, Wittmann)

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Model vs. Buoy

Still considerable scatter

On a large scale

Cavaleri and Sclavo

Coastal Engineering 53 (2006) 613–627

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Cavaleri and Sclavo. Coastal Engineering 53 (2006) 613–627

You could correct model results with satellite data, but…

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It is worth to analysing single events with the help of altimeter data

Cavaleri and Sclavo. Coastal Engineering 53 (2006) 613–627

… there would still be a considerable scatter

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December 1999

Thyrrenian Sea

0

100

200

300

400

500

600

700

800

23_0

0

23_0

6

23_1

2

23_1

8

24_0

0

24_0

6

24_1

2

24_1

8

25_0

0

25_0

6

25_1

2

25_1

8

26_0

0

26_0

6

26_1

2

26_1

8

27_0

0

27_0

6

27_1

2

27_1

8

28_0

0

28_0

6

28_1

2

28_1

8

29_0

0

29_0

6

29_1

2

29_1

8

30_0

0

Tempo

Hs (

cm

)

Ponza buoy Cetraro buoy ECMWF Ponza ECMWF Cetraro

a bb a b

a) SAR Frame 2781 26/12/1999 time 09:54

b) SAR Frame 801 29/12/1999 time 21:17

a) ERS-2 STR 079 26/12/1999 time 09:55

b) ERS-2 STR 086 26/12/1999 time 21:11

a) TOPEX STR 120 28/12/1999 time 06:48

b) TOPEX STR 122 29/12/1999 time 10:00

a

Ponza buoy

Cetraro buoy

WAVE HS

Co-located in space

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Embedded Swan grid

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MM5 Wind time

28/12/1999 alle

ore 18:00

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Cycle 268 Pass-120

28/12/1999 Time 06:48

0

1

2

3

4

5

39.023298 39.514033 40.052336 40.685927

Latitudine (Gradi)

Waves h

igh

t (m

)

ECMWF Topex Banda C " Cetraro buoy" Swan time 06:00

TOPEX STR-120 (06:48) 28/12/1999

versus ECMWF (06:00), ECMW/SWAN ( 06:00) and buoy ( 06:00)

Cetraro buoy

WAVE HS

Co-located in space

Co-location on a lee shore poor

SWAN “Interpolates” better

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Cycle 268 Pass-120

28/12/1999 Time 06:48

SWAN

1.000

1.500

2.000

2.500

3.000

3.500

4.000

4.500

40.296

40.199

40.101

40.003

39.906

39.808

39.710

39.612

39.514

39.416

39.318

39.220

39.122

39.023

38.925

38.827

38.728

Latitudine (°)

Wa

ve

s h

igh

t (m

)

Topex SWAN

TOPEX STR-120 (ore 06:48) versus ECMWF/SWAN (ore 06:00)

28/12/1999

Cetraro buoy

Co-located in latitude

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Wind/Waves (Ku,C) Topex

CYCLE 268 PASS 120 28/12/1999 TIME 06:48

0.000

0.500

1.000

1.500

2.000

2.500

3.000

3.500

4.000

4.500

40.1

9886

5

40.1

5003

6

40.1

0119

3

40.0

5233

6

40.0

0346

6

39.9

5458

3

39.9

0568

6

39.8

5677

5

39.8

0785

2

39.7

5891

5

39.7

0996

5

39.6

6100

2

39.6

1202

5

39.5

6303

6

39.5

1403

3

39.4

6501

7

39.4

1598

9

39.3

6694

7

39.3

1789

3

39.2

6882

6

39.2

1974

6

39.1

7065

3

39.1

2154

7

39.0

7242

9

39.0

2329

8

38.9

7415

5

38.9

2499

9

38.8

7583

0

38.8

2664

9

38.7

7745

5

38.7

2824

9

Latitudine [°]

Waves h

igh

t [m

]

0.000

2.000

4.000

6.000

8.000

10.000

12.000

14.000

16.000

18.000

Win

d s

peed

[m

/s]

Waves hight (m) Waves hight (m) Wind speed (m/s)

Vento

Banda C

Banda Ku

Cetraro buoy

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11,5

22,5

33,5

44,5

55,5

6

40,5

06

40,0

46

39,5

29

39,0

11

38,5

50

Latitudine (°)

Wa

ve

s h

igh

t (m

)

ERS-2 ECMWF time 12 ECMWF time 06

Track 122 Orbit 24525

29/12/1999 Time 10:11

Confronto dati ERS-2** STR-122 (ore 10:11) del 29/12/1999

con i dati dell'ECMWF (ore 06:00 e ore 12:00)

(No buoy data -too far)

Waves

Co-located in space

(not time)

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E1E2

E1) ENVISAT1 Ascendente 20/03/08 ore 20:44 N1p0085C067

E2) ENVISAT1 Discendente 23/03/08 ore 09:36 N1p0158C067

E4

E4) ENVISAT1 Discendente 26/03/08 ore 09:42 N1p0244C067

E5

E5) ENVISAT1 Discendente 29/03/08 ore 09:47 N1p0330C067E6

E6) ENVISAT1 Discendente 01/04/08 ore 09:53 N1p0416C067

E3

E3) ENVISAT1 Ascendente 23/03/08 ore 20:30 N1p0171C067

Griglia

0.5° x 0.5°

Boa di Cetraro

J1 J2

J3J4

J1) JESON 1 Discendente 26/03/08 ore 16:20 p0044c229

J2) JESON 1 Discendente 29/03/08 ore 15:33 p0120c229

J3) JESON 1 Ascendente 27/03/08 ore 06:23 p0059c229

J4) JESON 1 Discendente 03/04/08 ore 05:10 p0237c229

0.00

1.00

2.00

3.00

4.00

5.00

6.00

20_00

20_12

21_00

21_12

22_00

22_12

23_00

23_12

24_00

24_12

25_00

25_12

26_00

26_12

27_00

27_12

28_00

28_12

29_00

29_12

30_00

30_12

31_00

31_12

Time

Wa

ves

Hig

ht

(m)

Hs ECMWF HS Cetraro

E1 E2 E3 E4 E5 E6J1 J2 J3

J4

March-April 2008

Thyrrenian Sea

End of buoy

Data

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E2

0.003.006.009.00

12.0015.00

39.4

83835

39.3

53073

39.2

22298

39.0

91511

38.9

60712

38.8

29901

38.6

99077

38.5

68242

38.4

37395

38.3

06536

Latitudine (°)

Win

d s

peed (

m/s

) Wind Ecmwf time 6 Ecmwf time 12

E2) ENVISAT1 Discendente

23/03/08 time 09:36 N1p0158C067

WIND –

ENVISAT (09:36) 23/03/2008

versus ECMWF (06:00,12.00)

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E2

0

0,5

1

1,5

2

39.4

8383

5

39.3

5307

3

39.2

2229

8

39.0

9151

1

38.9

6071

2

38.8

2990

1

38.6

9907

7

38.5

6824

2

38.4

3739

5

38.3

0653

6

Latitudine (°)

Wa

ve

hig

ht (m

)

Hs [C] Ecmwf time 6 Ecmwf time 12

Cetraro Buoy 06:00 Cetraro Buoy 12:00

Cetraro Buoy

E2) ENVISAT1 Discendente

23/03/08 time 09:36 N1p0158C067

WAVES

ENVISAT (09:36) 23/03/2008

versus ECMWF (06:00,12.00), and buoy ( 06:00,09:00,12:00)

Waves

Co-located in space

(not time)

ENVISAT

It is worth while using altimeter

data to cross check model resultsbut there is more…

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It is worth while using altimeter

data to cross check model results

but there is more to say about sub-grid scale…

Most of the time wave buoys confirm altimeter data

often altimeter data differ from model data

It is often worth while refining global (or even regional) model results with

Local models (… better interpolation)

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y = -0,0286x + 1,4261

0

0,5

1

1,5

2

2,5

3

39.4838

35

39.4184

55

39.3530

73

39.2876

87

39.2222

98

39.1569

06

39.0915

11

39.0261

13

38.9607

12

38.8953

08

38.8299

01

38.7644

90

38.6990

77

38.6336

61

38.5682

42

38.5028

20

38.4373

95

38.3719

67

38.3065

36

Latitudine (°)

Waves h

igh

t (m

)

media=1.14

sqm=0.18

E2

Cetraro Buoy

E2) ENVISAT1 Discendente

23/03/08 time 09:36 N1p0158C067

Gustyness?

!?

Coefficient of

variation

σ/μ = 0,160,16

WAVES

ENVISAT (09:36) 23/03/2008

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y = 0.0148x + 5.4954

0

3

6

9

12

15

39.4

8383

5

39.3

5307

3

39.2

2229

8

39.0

9151

1

38.9

6071

2

38.8

2990

1

38.6

9907

7

38.5

6824

2

38.4

3739

5

38.3

0653

6

Latitudine (°)

Wid

sp

ee

d (

m/s

)

Media=5.64

S.q.m=0.87

E2

Cetraro Buoy

E2) ENVISAT1 Discendente

23/03/08 time 09:36 N1p0158C067

Wind

Gustyness?

!?

Coefficient of

variation

σ/μ = 0,15

Wind

ENVISAT (09:36) 23/03/2008

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J2 p0120c229 (29/03/08 – time 15:33)

y = 0,0082x + 0,9599

0

0,5

1

1,5

2

2,5

3

40,4

9344

40,4

0125

40,3

09

40,2

167

40,1

2435

40,0

3196

39,9

3951

39,8

4701

39,7

5446

39,6

6186

39,5

6922

39,4

7652

39,3

8378

39,2

9099

39,1

9815

39,1

0526

39,0

1233

38,9

1934

38,8

2632

38,1

1026

Latitudine (°)

Waves h

ight (

m)

Hs [Ku]Media = 1.12

S.q.m = 0.18

Cetraro Buoy

Waves JASON 1-fase A

Coefficient of

variation

σ/μ = 0,16

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J2 p0120c229 (29/03/08 – time 15:33)

y = -0.0581x + 7.6737

0

3

6

9

12

15

40.4

9344

40.4

0125

40.3

09

40.2

167

40.1

2435

40.0

3196

39.9

3951

39.8

4701

39.7

5446

39.6

6186

39.5

6922

39.4

7652

39.3

8378

39.2

9099

39.1

9815

39.1

0526

39.0

1233

38.9

1934

38.8

2632

38.1

1026

38.0

1684

Latitudine (°)

Win

d S

pe

ed

(m

/s)

Media = 6.33

S.q.m. =1.36

Cetraro Buoy

Wind JASON 1-fase A

Coefficient of

variation

σ/μ = 0,21

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J2 p0120c229 (29/03/08 – time 15:33)

0

0.5

1

1.5

2

38.8 39

39.2

39.4

39.6

39.8 40

40.2

40.4

40.6

Latitudine (°)

Waves h

ight

(m)

ECMWF time 12:00 Hs (c) Hs (Ku) ECMWF time 18:00

ECMWF grid

0.5° x 0.5°

Cetraro Buoy No buoy data

Waves JASON 1-fase A

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y = 0,0484x + 0,7726

0

0,5

1

1,5

2

2,5

3

38,4

3471

38,5

2795

38,6

2114

38,7

1429

38,8

5392

38,9

4695

39,0

3993

39,1

3287

39,2

2576

39,3

186

39,4

1139

39,5

0413

Latitudine (°)

Wave

s hig

ht

(m)

Hs [Ku]

Media = 1.298

S.q.m. = 0.35

J3 p0059c229 (27/03/08 – time 06:23)

Cetraro Buoy

WAVES JASON 1-fase A

Coefficient of

variation

σ/μ = 0,27

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J3 p0059c229 (27/03/08 – time 06:23)

y = 0.2766x + 4.0766

0

3

6

9

12

15

38.43471

38.52795

38.62114

38.71429

38.85392

38.94695

39.03993

39.13287

39.22576

39.3186

39.41139

39.50413

Latitudine (°)

Win

d s

pe

ed

(m

/s)

Media = 7.39

S.q.m. = 1.20

Cetraro Buoy

WIND JASON 1-fase A

Variation

coefficient

σ/μ = 0,16

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J3 p0059c229 (27/03/08 – time 06:23)

0

0.5

1

1.5

2

2.5

3

38.3

38.4

38.5

38.6

38.7

38.8

38.9 39

39.1

39.2

39.3

39.4

Latitudine (°)

Waves h

ight

(m)

Hs (c) Hs (Ku) ECMWF time 06:00

Cetraro Buoy

WAVES JASON 1-fase A

(No buoy data)

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y = -0.0085x + 2.6944

0

0.5

1

1.5

2

2.5

3

3.5

40.4131

29

40.2171

15

40.0210

72

39.8250

00

39.6289

00

39.4327

72

39.2366

16

39.0404

32

38.8442

20

38.6479

82

38.4517

17

38.2554

25

38.0591

07

Latitudine (°)

Wave H

igh

t (m

)

Media = 2.53

S.q.m. = 0.33

WAVES ENVISAT1 Discendente 26/03/08 ore 09:42

E4

Coefficient of

variation

σ/μ = 0,13

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WIND ENVISAT1 Discendente 26/03/08 ore 09:42

E4

y = 0,0012x + 7,5075

0

3

6

9

12

15

40.4131

29

40.2171

15

40.0210

72

39.8250

00

39.6289

00

39.4327

72

39.2366

16

39.0404

32

38.8442

20

38.6479

82

38.4517

17

38.2554

25

38.0591

07

Latitudine (°)

Win

d s

peed

(m

/s)

Media = 7.53

S.q.m. = 1.13

variation

coefficient

σ/μ = 0,15

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Cavalleri Abdalla JGR vol 107 2002

“Gustyness”

Has been

explored

before

On a larger

scale

And then,

Wind

“smoother”

than

waves

Page 28: SATELLITE APPLICATIONS TO SEA STATE EVALUATION IN … · Cetraro Buoy 06:00 Cetraro Buoy 12:00 Cetraro Buoy E2) ENVISAT1 Discendente 23/03/08 time 09:36 N1p0158C067 WAVES ENVISAT

TOPEX PHASE B pass. 118

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KISR

KISRKuwait Institute for Scientific Research

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Latitudine - Alt.onda (C,Ku)

0

1

2

3

4

5

6

7

8

9

23.5 24 24.5 25 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda CBanda Kulim.inf.zona non influenzatalim.sup.zona non influenzata

22-Dic-2002 ore 22:32:46

Zona influenzata Zona non

influenzata

Zona

influenzata

Ciclo 378

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Ciclo 378

Passaggio discendente

Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

27.4 27.6 27.8 28 28.2 28.4 28.6 28.8 29 29.2 29.4Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda C

Banda Ku

BOA

22-Dic-2002 ore 22:32:46

KISR Kuwait Institute for Scientific Research Wavemeter data

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Ciclo 384

Passaggio discendente

Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0

0.5

1

1.5

2

2.5

27.5 28 28.5 29 29.5Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda CBanda KuBOA

20-Feb-2003 ore 10:23:55

Wavemeter data from

KISR Kuwait Institute for Scientific Research

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Ciclo 411

Passaggio discendente

Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

27.4 27.6 27.8 28 28.2 28.4 28.6 28.8 29 29.2 29.4Latitudine

Alt

.on

da (

C,K

u)

Banda C

Banda KuBOA

15-Nov-2003 ore 03:44:02

Wavemeter data from

KISR Kuwait Institute for Scientific Research

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Ciclo 420

Passaggio discendente

Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0

0.2

0.4

0.6

0.8

1

1.2

27.6 27.8 28 28.2 28.4 28.6 28.8 29 29.2 29.4

Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda CBanda KuBOA

12-Feb-2004 ore 09:30:46

Wavemeter data from

KISR Kuwait Institute for Scientific Research

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Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0

0.2

0.4

0.6

0.8

1

1.2

27.4 27.6 27.8 28 28.2 28.4 28.6 28.8 29 29.2 29.4Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda CBanda KuBOA

08-Ago-2004 ore 21:04:11

Ciclo 438

Passaggio discendente

Wavemeter data from

KISR Kuwait Institute for Scientific Research

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Ciclo 452

Passaggio discendente

Latitudine - Alt.onda (C,Ku)(solo zona di mare)

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

28.85 28.9 28.95 29 29.05 29.1 29.15 29.2 29.25

Latitudine [°]

Alt

.on

da (

C,K

u)

[m]

Banda C

Banda Ku

BOA

25-Dic-2004 ore 16:43:35

Wavemeter data from

KISR Kuwait Institute for Scientific Research

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*Synthesized wave data must be taken with a pinch of salt, specially for extreme events

Altimeter data may provide a good check

**It’s worth while using smaller scale (Sub Global ECMWF) wave modelling, specially for near shore locations

***Fluctuations (“Gustyness”) as shown by altimeter data on the scale of a few miles might be more important than

expected

ACKNOWLEDGEMENTS

Thank you for useful data and interesting discussion to

KISR (K. Rakha)

APAT (S. Corsini, R. Inghilesi, S. Morucci)

Italian Air Force Meteo Office (R. Tajani)

ESA/ESRIN (J. Benveniste)

Altimeter data from

Radar Altimeter Database System (RADS) http://rads.tudelft.nl/rads/rads.shtml

and through ESA/EO Project 1172 “Remote Sensing of Wave Transformation”

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The diver’s tumb

Paestum

(ca. 480-470 BC)

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“Sentry” Wave meter

“Virtual” Wave meters

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ond.virt.

3

ONDAMETRO PONZA-CETRARO

Dati: H, T, dir

evento estremo

ond.virt.

1

ond.virt.

2……… ond.virt.x

Dir

KH

KT

0

0.365

0.511

5

0.357

0.504

10

0.354

0.501

15

0.351

0.497

……… ……… ond virt

n-1

ond virt

n

DATABASE ONDAMETRI VIRTUALI

……… Sez (x-1)

Sez x

H (Tr 5)

5.0

8

H (Tr 50)

7.5

4

H (Tr 100)

8.2

6

Sez (x+1)

…………

DATABASE TRANSETTI

TRASPOSIZIONE GEOGRAFICA

PERICOLOSITA’ Sez x

Hond > H (Tr = 100) P4 - pericolosita' molto

elevata;

H (Tr = 50) < Hond < H (Tr = 100) P3 - pericolosita' alta;

H (Tr = 5) < Hond < H (Tr = 50) P2 - pericolosita' media;

Hond < H (Tr = 5) P1 - pericolosita' bassa. SISTEMA

ALLERTA

DANNO Sez x

danno molto elevato - D4

danno elevato - D3

danno medio - D2

danno moderato - D1

RISCHIO Sez x

rischio molto elevato - R4

rischio elevato - R3

rischio medio - R2

rischio moderato - R1

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Fig.14: Individuazione punti di calibrazione su tracce 122 e 272

del radar altimetro RA2 di Envisat

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