T6 Airborne dataset for EarthCARE prepara6on Main contributors : J. Delanoë, M. Ceccaldi, J. Pelon, D. Bruneau, A. Protat (CAWCR), A.

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1 T6 Airborne dataset for EarthCARE prepara6on Main contributors : J. Delanoë, M. Ceccaldi, J. Pelon, D. Bruneau, A. Protat (CAWCR), A. Schwarzenboeck (LAMP), H. Chepfer, V. Noël (LMD), J. C. Dupont, M. Haeffelin (IPSL)

2 The level 1 dataset will be different for the two missions data with airborne instrument prototypes is much more informapve about the signal that will actually be observed. We thus need to build a test database with actual observapons to prepare our future analysis of EarthCare data. That will contribute to : spmulate new ideas of geophysical informapon that can be extracted from EarthCare mission help in future algorithms development prepare the French contribupon to validapon plan of the EarthCare mission. In this work package we will prepare an airborne data set.

3 Main tasks related to the airborne dataset Prepare the RALI instrument for the collecpon of an EarthCare- like dataset (ongoing): ensure that the 3 beams of the Doppler cloud radar RASTA are integrated and validated using MT- MALDIVES- HYMEX- HAIC experiments and evaluate the HSR measurements recently collected in December 2010 during the LNG validapon experiment. Conduct the field experiment Process relevant RALI + in- situ microphysics cases to build a database of reference cases for the preparapon and validapon of EarthCare Doppler radar and radar- lidar cloud algorithms The data collected by RASTA during MT- Africa MT- Maldives and HYMEX are currently being analysed. Analysis of the data collected during the 2010 LNG campaign has started.

4 F20 operated by SAFIRE RALI LNG RALI RASTA (Doppler radar) LNG (HSR lidar 355nm) Wavelength (Frequency) 3.2 mm (95.04 GHz) 355/532/1064 nm VerPcal resolupon (m) Range (km) IntegraPon Pme (ms) minimum Energy 1.6 kw 60 mj/10 mj/80 mj Ambiguous velocity (m s- 1) 8 - Full angle beam width (mrd) /4/6.5 SensiPvity ~- 40dBZ@1km (depends on config) Molecular scaiering FALCON speed (m s- 1) In- situ measurements (LAMP) + radiometer Climat IR (LOA) Tight collaborapon with LAMP (Laboratoire de Météorologie Physique, Clermont Ferrand, FRANCE) for in- situ measurements. (2DS/2DC/2DP/CPI/PIP/FSSP, CDP )

5 RASTA 30cm MulP- beam Doppler 3dBZ Difference V U 45cm

6 Period Name Description Where? Summer 2006 AMMA West African Monsoon West Africa Radar+lidar May 2007 CIRCLE II Better understand cirrus cloud processes involved in their life cycle and validation of satellite observations France/Germany Radar+lidar Spring 2007 EUCAARI European integrated projection aerosol cloud climate air quality interactions The Netherlands Radar+lidar Spring 2008 Summer 2010 POLARCAT Artic polar clouds Sweden Radar+lidar MT-Africa Megha-Tropiques preparation West Africa Radar only (5 antennas) Autumn 2010 LNG- CALIPSO CALIPSO validation and LNG HSR lidar test Atlantic Ocean Radar + lidar (HSR) Autumn 2011 DYNAMO Megha-Tropique preparation The Maldives Radar Only (6 antennas) Autumn 2012 HYMEX Role of clouds as water reservoirs in high precipitation events Mediterranean sea Radar Only (6 antennas) Jan-Feb 2014 HAIC (HighIWC) Impact of large concentration of small ice particles on aircraft engines Darwin Australia Radar (6 antennas) + (Lidar HSR?)

7 Infos RALI new configurapon: Doppler cloud radar 6 antennas Lidar (HSR capability) So far we had some difficulpes stabilising the HSR in airborne configurapon. Problems idenpfied (oppc fibres/laser/detector) and will be ready next summer.

8 Examples

9 LNG(:(355(nm,(532(nm(and(1064(nm(+(High(spectral(resolu&on(capability(( ( N A( (Train(valida&on( N Earthcare(prepara&on( RALI vs CloudSat- CALIPSO Autumn(2010:(( Campaign(CALIPSO( (LNG(for(CALIPSO( valida&on(and(hrs(lng(tests( Several(ANTrain(overpasses(during(the( mission( RALI*ATTrain*overpass*02T12T2010*

10 HSR lidar at 355nm High spectral resolupon capability at 355nm β part β mol CloudSat/CALIPSO vs RALI (532nm/1064nm/95GHz) RALI (355nm/Doppler 95GHz) => EarthCare

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12 Polar clouds (POLARCAT) a) 10 1 IWC [g m 3 ] Latitude [ ] 1 b) Relative difference (IWC) RALI CPI 2DC 2DP Radar only Lidar only RALI Radar only Lidar only 2DC 2DP Height [km] IWC (CPI) [g m 3 ] N t [#/m 3 ] r e [micron] V d [m/s]

13 CloudSat WIRE retrieval RASTA Doppler RASTA

14 8 dec flight 51

15 Discussion about HSR Signal to noise rapo? Aerosol OK (answer next summer, CHARMEX campaign) Clouds? Cloud has to be oppcally thin to use properly HSR - > radar can compensate when molecular signal is very very low