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AstroMeteorology at the University of Valparaíso. AstroMeteorology Group Omar Cuevas - Arlette Chacón Michel Curé Department of Physics and Astronomy Universidad de Valparaíso. History. Department of Physics and Meteorology Learning MM5 system model CONICYT - DAAD project:

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Presentation Transcript
slide1

AstroMeteorology at the

University of Valparaíso

AstroMeteorology Group

Omar Cuevas - Arlette Chacón

Michel Curé

Department of Physics and Astronomy

Universidad de Valparaíso

Astromet-UV

slide2

History

Department of Physics and Meteorology

Learning MM5 system model CONICYT - DAAD project:

Stay at Munich Institute of Meteorology

Astromet-UV

slide3

History

First MM5 simulation

For

Paranal

West-East Vertical Cross section

Velocity field

Astromet-UV

slide4

History

First MM5 simulation

For

Paranal

North - South Vertical Cross section

Velocity field

Astromet-UV

slide5

MIM (Munich Institute of Meteorology ):

MM5 - Paranal

MM5 Domains

Astromet-UV

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MIM: MM5 - Paranal

TKE

Turbulent

Kinetic

Energy

Present at

Lower altitude

levels

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slide7

MIM: MM5 - Paranal

Trajectories

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15 km

Omar Cuevas: MM5 user

Trajectories

Universidad de Valparaíso

2003-2004 & 2006 

Universidad de Chile

2004-2005

Cross section to 20º S

Potential Vorticity (PV) (shadows colors)

Specific humidity

(black lines)

Astromet-UV

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MM5

Atmospheric Modelling

Boundary Conditions

NCAR/GFS

ECMWF

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MM5/MPP

TERRAIN

INTERPF

REGRID

RIP

GrADS

Vis5D

GFS

ECMWF

ETA…

MM5: Pre & Post Processing

Astromet-UV

slide11

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).

Astromet-UV

slide13

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.

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slide14

Paranal

Macon

Description of the zone

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Climatological Analysis (Re-Analysis)

Temperature in 925 HPa

Climatological

Most

Predominant

condition:

Anticyclonic

Predominance

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slide16

MM5 Forecast

Potential high (black lines)

Relative vorticity (shadows colors)

Satellite image of infrared chanel GOES-12

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Observed variables vs. simulated variables (MM5)

Wind Speed

Observed & Modeled

Temperature

Post-processed using a

Kalman filter

for ECMWF data in Paranal/La Silla

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slide18

Trajectories analysis: Paranal-Macón?

Domain 2

Trajectories

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Trajectories analysis: Tolar-Macón?

Domain 4

Trajectory

0.5 km

over

Macón

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Macon

circulación

cerrada

Tolar

Macon

Macon

circulación

cerrada

circulación

cerrada

Tolar

Tolar

Trajectories analysis: Tolar-Macón?

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Trajectories analysis

Example:

Heights crossed by trajectories

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slide26

Number of Richardson

A dimensionless parameter whose values

determines if convection is free or forced

# Richardson for bad seeing case

# Richardson for good seeing case

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slide30

Gemini-South AstroMeteorology project

Analysis 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

Astromet-UV

slide31

Gemini South zone

Southern Astrophysical

Research Telescope

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slide33

E-ELT - TMT

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slide34

Seeing episode: Aug 13th, 2006

3064 m.a.s.l.

2290 m.a.s.l.

4477 m.a.s.l.

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slide35

TERRAIN-MM5 Domain 3

Resolution : 3 km

Tolar

Tolonchar

Armazones

Macon

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slide36

Synoptic Analysis

  • Anticiclonic Predominance
  • Estratiform Cloudness (Costal trough= Vaguada Costera)
  • Subtropical Jet Stream, low intensity
  • Stable atmosphere.

Infrared 00 UTC

Water Vapor 00 UTC

Water Vapor 03 UTC

Water Vapor 09 UTC

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slide37

MM5 Simulation

03 UTC

03 UTC

  • Anticyclonic Predominance (500 Hpa)
  • Positive Vorticicity (anticiclonic)
  • West Circulation
  • Subtropical Jet Stream (250 Hpa)
  • Low intensity
  • Stable Atmosphere

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slide38

05 UTC

06 UTC

07 UTC

Tolar

Thermal Perturbation

First 4km

Potential temp.

Velocity field

Potential vorticity

05 UTC

06 UTC

07 UTC

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slide39

Tolonchar

Thermal Perturbation: Not Clear

Probably Mechanical

First 10km

Potential temp.

Velocity field

Potential vorticity

04 UTC

03 UTC

03 UTC

05 UTC

05 UTC

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slide40

Armazones

Normal “good seeing” Night

00 UTC

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slide41

1 km

2 km

Tolar

Tolonchar

Armazones

Trajectory analysis

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slide42

4 km

8 km

Trajectories analysis

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slide45

FINAL GOAL

  • 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

Astromet-UV