Validation of Bird Movement Signatures in Weather Radar Wind

Profiles using a Dedicated Bird Radar

Iwan Holleman (KNMI)Hans van Gasteren (RNLAF,UvA)

Willem Bouten (UvA)

Migrating Lapwings

VAD/VVP Wind Vector Retrieval

Bird Migration in De Bilt

Std.Dev. < 2 m/s

12 UTC 16-03-2004 – 12 UTC 18-03-2004

Heig

ht

0-6

km

Std.Dev. > 2 m/s

Hig

h q

ualit

y w

ind

pro

file

s

Std.Dev. < 2 m/s

Hirlam NWP

WRWP and radiosonde

WRWP WRWP

RDSRDS

Flycatcher Bird Radar2.4 degX-band160 kW0.2 s

RHI from Flycatcher Bird Radar

Range from radar

Heig

ht

weather radar

bird radar

Weather

Big bird

Small bird

March – May 2003

80 km

Th

resh

old

Bird Detection Criteria Standard Deviation > 2.0 m/s Radar Reflectivity < –5 dBZ “Wind” Speed > 6 m/s

Weather radar

YES NO

TOTB+DA+C

C+DD

correct rejections

Cfalse

alarmsNO

A+BB

missesA

hitsYES

Weather radar

YES NO

TOTB+DA+C

C+DD

correct rejections

Cfalse

alarmsNO

A+BB

missesA

hitsYES

Weather radar

YES NO

19700144015319

15859138302029NO

38615713290YES

Bird

rad

ar

Bird

rad

ar

Weather radar

YES NO

19700144015319

15859138302029NO

38615713290YES

Weather radar

YES NO

19700144015319

15859138302029NO

38615713290YES

Bird

rad

ar

Bird

rad

ar

FC=86.8, POD=85.2, FAR=38.1, Bias=1.38 Threshold 1 bird/km3, per hour per 200 meter

Speed and Direction

Direction bins of 15 deg

Speed bias of –3.5 m/s

Bias corrected

Speed bins of 3 m/s

Correspondence fraction

0.0 0.2 0.4 0.6 0.8 1.0

Alti

tud

e (

km)

0

1

2

3

4

SpeedDirection

Ass

ess

ment

of

Bir

d

Den

sity

Bird radar

WRWP

Bird Density

TBD = 0.29 + 0.09 VIR

OPERA: 150 radars100

Doppler3 Dual-pol

Conclusion and Outlook

Bird movement can be extracted from WRWPCollocated, dedicated comparison neededApplication on European network?