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Overview of IHOP-FRA activities including LEANDRE 2 analyses

Overview of IHOP-FRA activities including LEANDRE 2 analyses. IHOP_2002 Spring Science Workshop 24-26 March 2003 NCAR, Foothills Laboratory, Boulder, CO. Overview of IHOP-FRA activities. Teams and objectives of IHOP LEANDRE 2 contribution IHOP-FRA priority days

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Overview of IHOP-FRA activities including LEANDRE 2 analyses

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  1. Overview of IHOP-FRA activitiesincluding LEANDRE 2 analyses IHOP_2002 Spring Science Workshop 24-26 March 2003 NCAR, Foothills Laboratory, Boulder, CO

  2. Overview of IHOP-FRA activities • Teams and objectives of IHOP • LEANDRE 2 contribution • IHOP-FRA priority days • Activities envolving LEANDRE 2 • 20 June ELLJ/Bore case • CI-related activities • BLE-related activities • BLH-related activities (poster by J. Tarniewicz) • Intercomparison exercise (oral by Behrendt) • Other activities • GPS (oral by J. van Baelen) • Modelling (poster by F. Couvreux)

  3. Teams and objectivesof IHOP-FRA

  4. Teams and objectifs of IHOP-FRA • 3 TEAMS (CNRS/METEO-FRANCE): • LEANDRE 2: L2 operation during IHOP, L2 data processing and • analysis • GPS: operation of 7 GPS receivers, processing and analysis • Modelling: Meso-NH and MM5 simulations (LES, CRM) • 3 TRANSVERSE RESEARCH THEMATICS : • Theme 1 : ABL processes; secondary circulations in the ABL; • WV heterogeneities in the ABL and its connections with surface • heterogeneities • Theme 2 : Morphology of drylines and breeze-like circulations • Theme 3 : Convective initiation; moisture transport into MCSs; • Diurnal cycle of convection

  5. LEANDRE 2 contributionto IHOP_2002

  6. DIAL H2O LEANDRE 2 Standard processing: 100 shots (10 sec.) 800 m horizontal resolution 300 m vertical resolution Precision: 0.05-0.1 g kg-1 at 3.5 km 0.3-0.4 g kg-1 near surface Bias RMS / RSD: 0.15 g kg-1

  7. LEANDRE 2 in the NRL P-3 • Sideway pointing in the ABL • Vertical pointing (nadir or zenith) • coupling with ELDORA clear air measurements Radom ELDORA L2 mirror fairing

  8. LEANDRE 2 operations during IHOP 142 h scientific flights • Boundary-Layer Heterogeneity*: 7 missions / 35h28 • Boundary-Layer Evolution**: 3 missions / 21h16 • Convective Initiation**: 12 missions / 73h18 • Evening Low-Level Jet*: 2 missions / 11h19 *nadir pointing **horizontal pointing

  9. LEANDRE 2 golden days • Quality LEANDRE data / high scientific interest (12/24): • BLH: 27 May; 29 May; 07 June • BLE: 14 June; 21 June; 25 June IHOP-FRA priorities • ELLJ: 07-08 June; 20 June • CI: 10 June; 12 June; 15 June; 19 June Collaborations (ongoing/anticipated) • CI: • Tammy W., Dave K., Hanne M., and Roger W. : 10, 12, and 19 June cases, • Wen-Chau and Huaqing: 9 and 11 June cases. • Bore: Steve K. and the “Bore science Team”: 20 June case • BLE: Tammy W.: 14 June case • BLH: Ken D. and Ken C.: all cases

  10. LEANDRE 2 processing LEANDRE 2 scientists: C. Flamant, K. Lhomme (PhD), and T. Weckwerth with support from: P. Genau (CNRS) and C. Pettet (NCAR) 2 3 • CNRS: • Horizontal data processing: K. Lhomme and C. Flamant • (Analyses are conducted by Karen as part of her PhD) • Nadir data processing: C. Flamant 1 terrain 4

  11. Analyses envolving LEANDRE 2

  12. ELLJ/Bore related activities20 June 2002 case

  13. ELLJ/Bore-related activities • Objectives: • Study the life cycle of a bore event, • Compare observations with hydraulic theory, • Understand the role of bores in nocturnal convection • maintenance, • Water vapor budget, • Validatation for high-resolution numerical simulations. • Means/instruments: • WSR-88D radars (triggering mechanisms), • L2+S-POL (temporal evolution), • Profiling in Homestead (break-down), • Dropsondes • MANDOP-type 3DVAR analyses –including ELDORA, S-POL, • DDC radar and L2 (MCS dynamics, budgets). 2 3 1 terrain 4

  14. ELLJ mission 20 June 2002 2 3 1 terrain 4

  15. ELLJ mission 20 June 2002 2 3 1 terrain 4

  16. 0329 UTC LEANDRE 2 Temporal evolution 0408 UTC 0555 UTC

  17. S-POL

  18. LEANDRE 2 Dropsonde WV profiles south of the MCS

  19. LEANDRE 2 Dropsonde WV profiles close the MCS

  20. BLE- related activities14 and 21 June 2002

  21. BLE-related activities • Objectives: • Analyze water vapor variability evolution with time, • in connection with the entrainment process, • Investigate relationships between water vapor • distribution dynamical structures in the ABL (rolls, cells), • Provide some sort of validation for LES and high- • Resolution “real case” simulations, • Means/instruments: • Large Eddy Simulations • Idealized 3-D simulations • Real case simulations • IHOP data (including S-POL, ELDORA, DIALs) • MANDOP-type 3DVAR analyses 2 3 1 terrain 4

  22. BLE mission 14 June 2002 2 3 1 terrain 4

  23. BLE mission 14 June 2002 LEANDRE 2: sideway pointing in the ABL Blind zone

  24. BLE mission 14 June 2002 Also see Fleur’s Poster!! • Present the existing diagnostic tools for water vapor • variability analyses using the mesoscale model Meso-NH • Verify wether Meso-NH can simulate the observed water • vapor variability, • Use the diagnostic tools to identify the origin of water • vapor variability.

  25. BLH- related activities29 June 2002

  26. BLH-related activities • Objectives: • Analyze east-west water vapor variability, in connection • with the entrainment process and soil moisture, • Analyze the impact of small scale water vapor • variability on GPS IWV retrievals • Means/instruments: • Real case simulations • IHOP data (including S-POL, ELDORA, DIALs, GPS) • MANDOP-type 3DVAR analyses 2 3 1 terrain Also see Jerome’s Poster!! 4

  27. CI- related activities10, 12, 15 and 19 June 2002

  28. CI-related activities • Objectives: • better understand CI in connection with ABL processes, • surface heterogeneity, dryline morphology and • breeze-like circulations, • analyze the role of « lateral entrainment » process, • explore the role of moisture “pockets” resulting from Cu • dissipation on CI, • assess whether dry air intrusion mechanisms inhibit CI • as they do in the Tropics • analyze the transition between shallow and deep • convection and the role of the moisture field above the ABL • Means: • Large Eddy Simulations • Idealized 3-D simulations (front, triple point) • Real case simulations • IHOP data (L2, AERI, MAPR, RDS, FM-CW, S-POL)

  29. CI mission 19 June 2002 2 3 1 terrain 4

  30. CI mission 19 June 2002 P-3 flying at 1500 m Blind zone LEANDRE 2: sideway pointing in the ABL through a « dry-line »

  31. Intercomparison exercise8 June 2002

  32. CI-related activities Activities conducted in the framework of the ESA project coordinated by V. Wulfmeyer Objective: Intercomparison of DLR, NASA and CNRS DIAL measurements I would like to propose that we do not just compare profiles and performance, but have the different groups PROCESS the data from other groups (there is a lot to learn in this process). Assessement of the algorithms performances, not just instruments performances

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