AstroMeteorology at the University of Valparaíso

Jan. 30th, 2008Jan. 30th, 2008 Astromet-UVAstromet-UV ESO-ChileESO-Chile

AstroMeteorology at the University of Valparaíso

AstroMeteorology GroupOmar Cuevas - Arlette Chacón

Michel Curé

Department of Physics and AstronomyUniversidad de Valparaíso


History

Department of Physics and Meteorology

Learning MM5 system model CONICYT - DAAD project: Stay at Munich Institute of Meteorology


History

First MM5 simulationForParanal

West-East Vertical Cross section

Velocity field


History

First MM5 simulationForParanal

North - South Vertical Cross section

Velocity field


MIM (Munich Institute of Meteorology ): MM5 - Paranal

MM5 Domains


TKETurbulent KineticEnergy

Present at Lower altitude levels

MIM: MM5 - Paranal


Trajectories

MIM: MM5 - Paranal


15 km

Cross section to 20º S

Potential Vorticity (PV) (shadows colors)

Specific humidity (black lines)

TrajectoriesOmar Cuevas: MM5 userUniversidad de Valparaíso 2003-2004 & 2006

Universidad de Chile2004-2005


Boundary Conditions

NCAR/GFSECMWF

Atmospheric Modelling

MM5


MM5: Pre & Post Processing

GFSECMWFETA…

TERRAIN

REGRID

INTERPF

MM5/MPP

RIPGrADSVis5D


Macon project (2006-2007) ESO-UV contract (Marc Sarazin)

+ Arlette Chacón

Objectives:

• Description of the zone: Orography and Climatology.• Statistical analysis of turbulence data and seeing.• Meteorological analysis for some events registered of seeing.• Analysis of meteorological data of stations in-situ.• Analysis of turbulence (Ri y TKE) and comparison with real data measured of seeing and turbulence (Cn2).

Jan. 30th, 2008Jan. 30th, 2008 Astromet-UVAstromet-UV

AstroMeteorology –Team


Configuration of the model Module TERRAIN Example for Macón zone

D1: 80 x 80 grids points. 27 km horizontal resolution.

D2: 70 x 97 grids points. 9 km horizontal resolution.

D3: 100 x181 grids points. 3 km horizontal resolution.

D4:73 x 85 grids points. 1 km horizontal resolution.


ParanalMacon

Description of the zone


Climatological Analysis (Re-Analysis)

Temperature in 925 HPaClimatological

MostPredominantcondition:

AnticyclonicPredominance


MM5 Forecast

Potential high (black lines)Relative vorticity (shadows colors) Satellite image of infrared chanel GOES-12


Observed variables vs. simulated variables (MM5)

Temperature

Wind SpeedObserved & Modeled

Post-processed using aKalman filter for ECMWF data in Paranal/La Silla


Trajectories analysis: Paranal-Macón?

Domain 2

Trajectories


Trajectories analysis: Tolar-Macón?

Domain 4

Trajectory0.5 km over Macón


Macon

Tolar

circulacióncerrada

Trajectories analysis: Tolar-Macón?


Example:Heights crossed by trajectories

Trajectories analysis


Statistics of turbulence and seeing data

N

Valid 43672

Missing 0

Mean ,9562

Median ,8209

Std. Deviation ,52784

Variante ,279

Minimum ,09

Maximum 3,09

Percentiles

25 ,5324

50 ,8209

75 1,3015


Statistics of turbulence and seeing data


Seeing vs wind speed


Number of Richardson

# Richardson for bad seeing case # Richardson for good seeing case

A dimensionless parameter whose values determines if convection is free or forced


TKE: Turbulent Kinetic Enregy


TKE for bad case of seeing


Thermal thickness: bad seeing (left) & “good” seeing (right)


Gemini-South AstroMeteorology projectAnalysis of meteorological predominant conditions to Cerro Pachón.

Analysis of observed data compared with simulated data.

Statistics on data of seeing.

Comparison of observation meteorological and simulate data with seeing data.

Trajectory analysis.

Comparison of atmospheric turbulence indexes, like TKE and Richardson number (Ri) with seeing.

Web access to results


Gemini South zone

Southern Astrophysical

Research Telescope


AstroMet web page


E-ELT - TMT


2290 m.a.s.l.

3064 m.a.s.l.

4477 m.a.s.l.

Seeing episode: Aug 13th, 2006


Tolar

Tolonchar

Armazones

TERRAIN-MM5 Domain 3Resolution : 3 km

Macon


Synoptic Analysis

•Anticiclonic Predominance

• Estratiform Cloudness (Costal trough= Vaguada Costera)

• Subtropical Jet Stream, low intensity

• Stable atmosphere.

Water Vapor 00 UTC Water Vapor 03 UTC Water Vapor 09 UTC

Infrared 00 UTC


MM5 Simulation

•Anticyclonic Predominance (500 Hpa) • Positive Vorticicity (anticiclonic)

•West Circulation

• Subtropical Jet Stream (250 Hpa)

• Low intensity

• Stable Atmosphere

03 UTC 03 UTC


Tolar

05 UTC 06 UTC

07 UTC

Thermal Perturbation

First 4km

Potential temp.Velocity fieldPotential vorticity

05 UTC 06 UTC

07 UTC


Tolonchar

03 UTC

04 UTC

05 UTC

Thermal Perturbation: Not ClearProbably Mechanical

First 10km

Potential temp.Velocity fieldPotential vorticity

03 UTC

05 UTC


Armazones

00 UTC

Normal “good seeing” Night


2 km1 km

Tolar

Tolonchar

Armazones

Trajectory analysis


4 km 8 km

Trajectories analysis


GPS-AstroMeteorology


FINAL GOAL: www.dfa.uv.cl/astromet


• Operational forecast (GFS & MM5) for all Observatories in Chile

•Perform research in astrometeorology

•Forecast the Seeing

…therefore help to optimize the resources and programming of the Observations

FINAL GOAL

AstroMeteorology at the University of Valparaíso

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