NARVAL. North Atlantic Rainfall Validation. Christian Klepp, Stephan Bakan, Gerhard Peters, Bjorn Stevens, Lutz Hirsch, Johannes Quaas

Transcription

1 NARVAL North Atlantic Rainfall Validation Christian Klepp, Stephan Bakan, Gerhard Peters, Bjorn Stevens, Lutz Hirsch, Johannes Quaas Klima Campus Meteorologisches Institut, Universität Hamburg Max-Planck-Institut für Meteorologie, Hamburg

2 NARVAL Partner University of Hamburg University of Cologne University of Leipzig University of Mainz University of Frankfurt University of Heidelberg Institute for Tropospheric Research, Leipzig Max Planck Institute for Meteorology, Hamburg Max Planck Institute for Chemistry, Mainz DLR no DFG funding yet

3 Concept New Foundland Barbados NARVAL- P T L A V R NA e d ra ostfr onta l m u c Oberpfaffenhofen us l u 3/ 58

4 NARVAL Post-frontal HOAPS GPCP GPROF 6.0 mm/h Hamburg OceanAtmosphere Parameters and Fluxes from Satellite data (SSM/I) ECMWF mm/h Global Precipitation Climatology Project mm/h ECMWF numerical weather prediction model 4/ 58

5 NARVAL Post-frontal Frequeny occurrence Mesoscale system frequeny occurrence per month (twice daily) with precip > 1mm/h in the outflow region of the LabSea Jan1988 to Dec 2001 HOAPS 555 Cases REMO-C 296 Cases (53%) REMO 137 Cases (24%) ERA Cases ( 7%) GPROF6.0 (from 1994 to 1999 only) 758 mesocyclone systems in HOAPS in 18 years 5/ 58

6 NARVAL Post-frontal Collocated ship to HOAPS satellite F13, F14, F15 data for 52 precip events Point-to-area validation for events shorter, longer 6 min duration Disdrometer: temporal window ± 45 min around individual SSM/I overpass VAR(x) = , STD(x) = , VAR(y) = , STD(y) = , RMSE = 0.19,0.36 BIAS = 0.18,0.32 r = 0.25, r = 0.6 Virga observed HOAPS: spatial window 110km centered around ship position rincl_corr_neg=0.57 rincl_corr_neg > 6min =0.94 Klepp et al., 2009 (in review) 6/ 58

7 NARVAL Post-frontal Convective mesoscale postfrontal precipitation Deficit of existing satellite and NWP data to detect such systems Systems can lead to unpredicted high impact weather over Europe HOAPS the Hamburg Ocean Atmosphere Parameters and fluxes from Satellite data climatology detects such systems in agreement with data from Voluntary Observing Ships These findings need to be validated in terms of quantitative amounts 7/ 58

8 NARVAL Trade cumulus 8/ 58

9 NARVAL Trade cumulus Deep Convection Mineral Ash Maximum Unobstructed Trades Statistics of Shallow Convection Biomass Burning 9/ 58

10 NARVAL Trade cumulus ACPC Barbados Field Study 10/ 58

11 NARVAL Trade cumulus The MPI-M (MIRA 36) Scanning Cloud Radar Differential absorption lidar Five-channel Raman lidar 11/ 58

12 Additional MPI-M and U Cologne Instrumentation JENOPTIK CHM 15K Ceilometer. Measurement range to km with 15 m resolution, multiple cloud layer detection, aerosol, cloud penetration depths and boundary layer height. Micro Rain Radar (MRR): Compact 24 GHz FMCW-radar, m resolution. Drop size distributions, liquid water & drop fall speed characteristics. CCN Measurements? Microwave radiometer 12/ 58

13 HALO Connecting Ground-Based Measurements to the largescale structure of the lower troposphere, and ongoing satellite based remote sensing climatologies. 13/ 58

14 HALO Instrumentation HALO HAMP (Hamburg/DLR Microwave Package). DLR water-vapor DIAL and/or wind lidar. Dropsondes. Downward looking infrared and visible imagers. Fast 10 Hz state variables (U,V, W, T & Q). Liquid water measurements. Cloud Spectrometers. Aerosol/CCN Characterization. 14/ 58

15 HALO Deployment strategy 2-4 day missions: day 1 depart Oberpfaffenhofen; day 2 or 3 short flight over Barbados (optional); day 4 return to Oberpfaffenhofen. High-Altitude, remote-sensing ferry legs along trajectory of airmass advecting over Barbados. Dropsondes deployed along trajectories (ferry legs). In situ characterization (as endurance allows) of the lower troposphere, boundary layer, cloud, aerosol structure (and surface fluxes) at interception points, and in radar scanning volume upon landing/take-off at Barbados. Super-site overflights out- or inbound (Lindenberg, Cabauw, Chilbolton,...) Interception of Barbados-bound airmass along ferry, ideally coincident with overpass of polar orbiters. This interception should be 3-5 days upstream of target on outbound legs, 1-2 days upstream on return legs. 15/ 58

16 Concept New Foundland Barbados NARVAL- P T L A V R NA e d ra ostfr onta l m u c Oberpfaffenhofen us l u 16/ 58

17 Full science and light options light : only HAMP and dropsondes, potentially filling idle times optimum flight schedule: December-January-February for Northern route March-April for Southern route if possible, better statistics by repeated flights 17/ 58

18 Status Kick-off meeting November in Hamburg (please contact Lutz Hirsch Bellypod ahead of windpods and PMS in certification HAMP ground-based version (mobile on trailer) exists Certification relatively advanced (expected spring 2010) 18/ 58