POLDIRAD and LINET
observations during COPS
Martin Hagen and Hartmut Höller
DLR Oberpfaffenhofen
Institut für Physik der Atmosphäre
POLDIRAD and LINET
Installation of the DLR C-band
polarimetric Doppler weather
radar at Waltenheim-sur-Zorn
in Alsace.
 PPI range 120 km
 RHI towards Hornisgrinde
 every 10 minutes
Enhancement of the operational
lightning detection network by
4 additional stations
Operations from June to
August 2007.
POLDIRAD
Achern
Hornisgr.
Bischenberg
AMF
Meistratzheim
60 km
120 km
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
2
POLDIRAD operation
Quicklooks available at
http://www.pa.op.dlr.de/poldirad/cops
and soon at WDCC
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
3
POLDIRAD observations during IOP 15 (daytime)
12 Aug. 2007 11-17 UTC
13 Aug. 2007 8-15 UTC
what is different between the two days ???
(over Vosges Mountains)
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
4
Cell Tracking IOP 15
12 Aug. 2007 11-17 UTC
cell tracks
13 Aug. 2007 8-15 UTC
first occurrence
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
5
MesoNH simulation IOP 15 (Evelyne Richard)
12 Aug. 2007 15 UTC
13 Aug. 2007 11 UTC
wind field and rain rate
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
6
Preliminary Explanation IOP 15
12 Aug. 2007 afternoon
13 Aug. 2007 noon
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
7
Isolated cell over Black Forest (IOP 8b, 15 July 2007)
radar
ground
clutter
Hornisgrinde
seen from the radar site (80 km)
Reflectivity (dBZ)
Hydrometeor
classification
graupel
small hail
rain
hail
+ rain
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
8
Enhancement of precipitation on the wind-ward side of the
Black Forest (22 June 2007)
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
9
Clear-air echoes (13 July 07)
Convective patterns visible
in Doppler velocity
(Schmidt, 1988)
Combined measurements
with Doppler
on Wheels
(DOW 2+3)
dual-Doppler
wind fields
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
10
POLDIRAD Observation 29 July 07
Chaff released by Do128 D-IBUF
Reflectivity
13:40
Correlation
coefficient
13:40
Ground
clutter
Ground
clutter
Chaff
Ground
clutter
Chaff
14:07
14:27
Ground
clutter
Murg
Valley
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
11
DFG-PP Proposal within COPS bundle:
Life Cycle of Precipitating Convective Cells
Aim of the proposal:
to study the life cycle of small precipitating
convective cells from initiation to decay
initiation of cells in relation to orography, surface wind field related to
orography, moisture field (radar, lidar, LINET, ... )
live cycle of precipitation, variation of rain drop size distribution
(polarimetric measurements)
enhancement or weakening in relation to orography
decay of cells, relation to orography, modification of rain drop size
distribution
PhD student position open
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
12
Institut für Physik der Atmosphäre
Martin Hagen, COPS-Workshop, Toulouse, Dec. 2007
13

POLDIRAD and LINET