Preliminary Match-up of AIRS to ARM CART Soundings and AVN Grids - - PowerPoint PPT Presentation

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Preliminary Match-up of AIRS to ARM CART Soundings and AVN Grids - - PowerPoint PPT Presentation

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Preliminary Match-up of AIRS to ARM CART Soundings and AVN Grids Eric Fetzer AIRS Science Team Meeting June, 2001 Pasadena E. Fetzer 1 AVN / ARM Match-ups June, 2001 ARM CART Matchup Procedure Match Dave Tobins ARM CART best

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SLIDE 1
  • E. Fetzer

June, 2001 1

AVN / ARM Match-ups

Preliminary Match-up of AIRS to ARM CART Soundings and AVN Grids

Eric Fetzer AIRS Science Team Meeting June, 2001 Pasadena

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SLIDE 2
  • E. Fetzer

June, 2001 2

AVN / ARM Match-ups

ARM CART Matchup Procedure

  • Match Dave Tobin’s ARM CART best estimate to

AIRS simulated retrievals.

  • Explain the synoptic picture
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SLIDE 3
  • E. Fetzer

June, 2001 3

AVN / ARM Match-ups

AIRS-ARM CART Matchup Granule 82, 817Z, T and Tdewpoint

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SLIDE 4
  • E. Fetzer

June, 2001 4

AVN / ARM Match-ups

AIRS-ARM CART Matchup Difference Granule 82 (green =T, blue = Tdewpoint)

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SLIDE 5
  • E. Fetzer

June, 2001 5

AVN / ARM Match-ups

Granule 82 Truth Clouds

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SLIDE 6
  • E. Fetzer

June, 2001 6

AVN / ARM Match-ups

ARM CART Conclusions

  • Hope for clear, calm, conditions during ARM CART
  • verpasses.
  • Supplemental information about the synoptic state

(e. g, satellite imagery, model analyses) is needed to identify these desirable conditions.

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SLIDE 7
  • E. Fetzer

June, 2001 7

AVN / ARM Match-ups

ARM CART Future Needs

  • Stability of Dave Tobin’s best estimate algorithm

– Handles 12 data streams (!)

  • A regular subscription of twice daily data from

Wisconsin to JPL.

  • The associated synoptic information (GOES, model

analyses, etc.).

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SLIDE 8
  • E. Fetzer

June, 2001 8

AVN / ARM Match-ups

Preliminary AVN Matchups

  • Match AIRS retrievals to all AVN grid points within a

~25 km / 1 hr window.

  • Look at global and regional temperature statistics
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SLIDE 9
  • E. Fetzer

June, 2001 9

AVN / ARM Match-ups

AVN Matchup Locations for Dec 15, 12Z

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SLIDE 10
  • E. Fetzer

June, 2001 10

AVN / ARM Match-ups

Global Results for AVN / AIRS Matchups, 12 Z

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SLIDE 11
  • E. Fetzer

June, 2001 11

AVN / ARM Match-ups

AVN / AIRS Matchups 12 Z, Europe Only: 15E- 45W by 30-65N

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SLIDE 12
  • E. Fetzer

June, 2001 12

AVN / ARM Match-ups

Conclusions from Matchups with AVN

  • Statistics are similar to Granule 401 results
  • This matchup procedure can be applied to ANY

gridded synoptic field.

  • Supplemental to other Golden Day analyses.
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SLIDE 13
  • E. Fetzer

June, 2001 13

AVN / ARM Match-ups

Further work on AVN Matchups

  • Generate statistics by retrieval type, cloud flags, day/night,
  • cean/land, etc.
  • Look in more detail at the other four model time steps on

December 15.

  • Prepare for other gridded fields

– ECMWF – DAO