Post on 26-Mar-2015
Slide 1
Improved Initialization for Precipitation Forecasts: Analysis of the ETReC missions during COPS 2007
Andreas Dörnbrack, Martin Wirth, and George C. Craig
Institut für Physik der AtmosphäreDLR Oberpfaffenhofen
Germany
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 2
Improved Water Vapour and Wind Initialisation for Precipitation Forecasts:
From existing LIDAR Data towards Targeted Observations2003
Improved Water Vapour and Wind Initialisation for Precipitation Forecasts:
Impact Studies with the ECMWF Integrated Forecast System2005
Improved Initialisation for Precipitation Forecasts: Analysis of the ETReC missions during COPS 2007
2007
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 3
T,P,q
u,v,w,TAS
Dropsondes:u,v, P,T,q
Doppler lidar:Horizontal & vertical wind
DIAL:H2O, Aerosolswu,v
Falcon payload for COPS/ETReC 2007
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 4
48 cm Telescope
DIAL Lasers
wind lidar
LCD-ScreenKeyboard
Wavelength Control
Data Acquisition
Water Vapour and Wind Lidar on board the Falcon
DIAL Filters & Detectors
two 50 cm aircraft windows
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 5
DLR Falcon Missions
Altogether: 48.8 flight hours/ 22.5 h funded by DFG
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 10
Possible Flight Route
Sensitive Region:Singular Vector (ECMWF)
Sensitive Region:ETKF (MeteoFrance)
Upstream Mission: ETReC 2007 UOP 6
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 11
Case Study on COPS IOP 13a on 1 August 2007
3 consecutive flights
-Flight 1 & 2: Upstream flights (OP - Faro & Faro - OP)
-Flight 3: Modified MAP flight over France
Diploma Thesis: Andreas Schäfler (Univ. Innsbruck)"Water vapour transport in a pre-convective
environment - use of airborne LIDAR measurements"
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 12
Synoptic Situationfrom ECMWF short-term forecast
1 August 2007,16 UTC
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 13
Water Vapor Mixing Ratio
Wind velocity
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 14
DIFFERENCES LIDAR - ECMWF
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 15
DIFFERENCES LIDAR - ECMWF
DFG Begutachtung Bad Honeff 10/11. Januar 2008
Slide 16
Overall Aim of the Project
investigate the influence of simultaneously observed wind and water vapour fields from airborne lidar observations during COPS on the skill of the NWP, especially the quantitative precipitation forecasts using the 4D-Var data assimilation scheme of the ECMWF-IFS
In order to reach this goal, we proceed in three steps:
1. check of the data quality and coverage of the lidar data for the three UOPs with airborne observations during ETReC 2007,
2. analyse the wind and water vapor lidar data and perform a case study of a selected ETReC case, and
3. investigate the impact of the targeted airborne wind and water vapour observations and of the additional radiosonde and high-frequency AMDAR measurements of selected UOPs during ETReC 2007 on the forecast skill of NWP models