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Julio Quijano, K. Takahashi , B. Dewitte

LMI-DISCOH. Lima, Perú 29-30th march 2012. Numerical and observational study of the dynamics of the Paracas Wind, associated with aeolian transport into the ocean off the coast of Ica - Peru. Julio Quijano, K. Takahashi , B. Dewitte. 1. PARACAS WIND (VP). 14-16hrs. 70.%.

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Julio Quijano, K. Takahashi , B. Dewitte

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  1. LMI-DISCOH Lima, Perú 29-30th march2012 Numerical and observational study of the dynamics of the Paracas Wind, associated with aeolian transport into the ocean off the coast of Ica - Peru Julio Quijano, K. Takahashi, B. Dewitte

  2. 1. PARACAS WIND (VP) 14-16hrs 70.% GOES 12 07OCT2004 15:00 HL Data: 1948-1990 Is a weather phenomenon between Pisco and San Juan. It’s a storm of dust and sand present during all year with more frecuency and strongly in August between the 14:00 and 18:00 hours local time. JUN-SET 73.7% Duration 1-4 Hours weak 5-8 Hours  moderate >8 Hours strong Escobar, 1993

  3. 2. CONSEQUENCES of VP: Decreaseof visibility Velocidad(Km) GOES 12 07OCT2004 15:00 HL Visibilidad (Km) Tiempo (Hora Local)

  4. 07sep2011 – ParaSEx-II

  5. 2. CONSEQUENCES of VP: Increase marine productivitybyIronimput Shaoet al., 2011 ??? Bloom Boyd et al., 2009 Increase biomas and competence of phy. (South of Australia) GOES 12 07OCT2004 15:00 HL Saukel et al., 2010

  6. 2. Howistheevolution of VP?: Duststorm in theworld Lithics Flux TOC Flux 1948-1990 Mahel et al. 2010 Gutierrezet al. 2009 VP Escobar,1993 Enfield, 1981

  7. 3. What must We know first? physical processes of regional scale ? MainQuestions: what process determinate the VP formation? How much it’s the lithic input to sea? What’s the source of dust and sand and the horizontal distribution of the dust plume ? PP: productividad primaria P: pisco physical processes of local scale P ?? PP 1. LITICO Hypothesis: The VP events depends by interaction between local and regional factors related to the increase of gradient presure and the surface radiation in the Paracas desert since early in the morning. VIENTO ? 07oct2004 Scheme of theproblem

  8. 4. Goals Principal Goal Determinate the mechanims of the ocurrence and evolution of Paracas Wind and of transport eolic • Specificgoal • Validatetheatmosphericmodel MM5. • A tridimentionaldescription of VP • Calculatetheinfluence of factors of local and regional scale. • Calculatethevelocityfricction and thethreadholds. • Make a numericexperimentwiththecoastal albedo. • Calculatetheparticuletrayectories in 3D. • Estimatethe flux horizontal of dust and sand.

  9. 5. Metodology Data: In situ: ParaSex-II , Pisco and MarconaStation, Pisco Airport, SernampStation, etc. Initialyconditionsforthe MM5: NCAR / Reanalysis , OptimationReynols SST ImageSatellyte: MODIS, CALIPSO, GOES 13 Validation: Diagrams of dispersion between MM5 result and Data, pearson correlation and calculated the root of mean error square. (after the test of the physic aproximations of the model ) We use the model results for describing the evolutions of factor atmospheric before and during the event. We use the model result for apply a lagrangia equation of particle velocity for every instant in the time. The logaritmic profile and the MoninObukov theory for calculated the friction and the squeme of "random walk" to simulated the turbulence. We use the empiric equation to estimate the horizontal flux of sand and dust. Domains of the MM5 ParaSEx-II (Mixpaleo- WindA) Dxmax. : 200 meters Dtmax : 0.25 seg.

  10. 5. Preliminary results: Data in situ

  11. 5. Preliminary results: Data in situ, Pilot Ballon. 07 September 2011 Wind Profile with meteorologic theodolite Preparingthepilotballon Measurementwithmeteorologictheodolite 11:45 hrs. 10:30 hrs.

  12. 5. Preliminary results: Time series of wind Velocity MIXPALEO WINDA Burk Thomson (Squeme of PlanetaryBoundaryLayer, PBL) , Dx (model)= 45Km km

  13. 5. Preliminary results: Time series of wind velocity MIXPALEO WINDA Burk Thomson (Squeme of PlanetaryBoundaryLayer, PBL) , Dx (model)= 1.8 km

  14. 5. Preliminary results: Diagrams of dispersion between the Data and MM5 result Burk Thomson PBL r=0.5 Gayno-Seaman PBL r=0.8

  15. 5. Preliminary results: MM5 result, Wind Velocity between 15:00 and 16:00 Local Time

  16. 5. Preliminary results: Evolution of wind velocity at 10 meter above the surface, Dx=250m Field of windvelocity in 7th September 2011 06:00 LT 12:00 LT 15:00 LT 18:00 LT “Thepatron of fieldit’s sensible tostrongvariations in thespace and the time” b a c d 15:00 LT GOES

  17. MODIS / TERRA 15:00 , 07SEP2011

  18. 5. Preliminary results: Wind profile (Logarithmic equation) in WINDA 5. Preliminary results:

  19. 5. Preliminary results: Friction velocity (Logarithmic equation) in WINDA Del Dias 05 y 06SET (cond. Neutras): Finalmente: Zo

  20. 5. Expected result: Friction velocity for find source and dust and sand Ust > 0.6 m/s (red shaded) www.meted.ucar.edu

  21. 5. Expected result: dust trayectories ,above surface / 07 Oct 2004 Event / MM5 – trayec.gs 100 meters 750 meters

  22. GRACIAS. J. Quijano Julio.quijano.v@upch.pe jjqv09@gmail.com

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