A Comparison of Calculated and Cloud- Cleared Radiances Over Land - - PowerPoint PPT Presentation

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A Comparison of Calculated and Cloud- Cleared Radiances Over Land - - PowerPoint PPT Presentation

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National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California A Comparison of Calculated and Cloud- Cleared Radiances Over Land and Water Evan Fishbein Simon Hook JPL AIRS

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National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

AIRS Fall 2006 Science Team Meeting

A Comparison of Calculated and Cloud- Cleared Radiances Over Land and Water

Evan Fishbein Simon Hook JPL

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National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

AIRS Fall 2006 Science Team Meeting

  • 1. Height dependence of observed minus

Calculated Radiances from ECMWF

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Atmospheric Sounding Channels

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North Africa Atmospheric Radiances Differences

12 hPa 35 hPa 40 hPa 100 hPa 690 hPa 150 hPa 340 hPa 490 hPa

Spatial coherency of cloud clearing versus height of cloud-cleared minus average footprint radiance

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Channel 79 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 79, 668.79 cm-1 , 12 hPa
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Channel 245 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 245, 719.76 cm-1 , 100 hPa
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Channel 237 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 237, 717.41 cm-1 , 690 hPa
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South America Atmospheric Radiances Differences

12 hPa 35 hPa 40 hPa 100 hPa 690 hPa 150 hPa 340 hPa 490 hPa

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Channel 79 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 79, 668.79 cm-1 , 12 hPa
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Channel 239 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 239, 717.99 cm-1 , 490 hPa
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Channel 237 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 237, 717.41 cm-1 , 690 hPa
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ASIA

12 hPa 35 hPa 40 hPa 100 hPa 690 hPa 150 hPa 340 hPa 490 hPa

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Mapped Calculated Radiances Asia Channel 79

  • Channel 79 668.79 cm-1 12 hPa
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Mapped Calc(ECMWF) - CC Radiances Asia Channel 245 Channel 245 719.76 cm-1 100 hPa

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Mapped Calc(ECMWF) - CC Radiances Asia Channel 239 Channel 239 717.99 cm-1 718 hPa

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North America

12 hPa 35 hPa 40 hPa 100 hPa 690 hPa 150 hPa 340 hPa 490 hPa

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Mapped Calc(ECMWF) - CC Radiances North America Channel 245 Channel 245 719.76 cm-1 100 hPa

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Mapped Calc(ECMWF) - CC Radiances North America Channel 239 Channel 239 717.99 cm-1 718 hPa

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Consistency between Channels

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Consistency between Channels

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Cloud-Cleared Radiance Summary

  • CC – ECMWF residuals are dominated by spatially-

correlated differences

  • Scan-dependence
  • State-dependence
  • Stratosphere not as useful as expected
  • ECMWF temperature errors > 1 K
  • CC error characterize random and systematic errors.
  • Includes ECMWF errors
  • Possibly at the point where CC – ECMWF residuals have

very limited usefulness at this point.

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National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

AIRS Fall 2006 Science Team Meeting

  • 1. Surface Products
  • Comparison of observed and laboratory emissivity

spectra

  • Emissivity radiometric signatures
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ASTER Emissivity Database

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Radiometric Signature of Minerals

  • Retrieved HaGolan atmosphere and skin temperature
  • Quartz surface - black surface
  • Calc(quartz surface) – Calc(black surface)
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Envelope of Radiometric Signature

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Model Emissivity Envelopes

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Emissivity Spectra

  • Compare retrieved emissivity spectra with laboratory

measurements

  • Locations

Tropical forest Salonga NP, Zaire Quartz sands Egypt 1 Carbonates HaNegev, Israel Basalts HaGolan Israel/Syria

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Ha Golan (Israel/Syria)

  • 33.04°

N, 36.04° E

  • Rift flood basalts
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Ha Golan (Israel/Syria) Radiance Residuals

  • CC – Calculated using retrieved states
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Ha Golan (Israel/Syria) Radiance Residuals

  • Calculated using emissivity database
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Ha Negev (Israel/Syria)

  • 30.93°

N, 34.77° E

  • Carbonates
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Ha Negev Radiance Residuals

  • CC – Calculated using retrieved states
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Ha Negev Radiance Residuals

  • Calculated using emissivity database
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Egypt One

  • 27°

7’ N, 26° 6’ E

  • Quartz Sands
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Egypt One Radiance Residuals

  • CC – Calculated using retrieved states
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SLIDE 36

Egypt One Radiance Residuals

  • Calculated using emissivity database
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Salonga National Park, Zaire

  • 2°

27’ S, 21° 15’ E

  • Vegetated tropical rain forest
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Salonga National Park, Zaire

  • CC – Calculated using retrieved states
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Salonga National Park, Zaire

  • Calculated using emissivity database
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Emissivity Summary

  • Significant improvements in long-wave emissivty
  • Attributed to regression
  • Strong Day-night differences in short-wave emissivity
  • Attributed to short-wave only skin temperature retrieval
  • Skin temperatures have day night differences
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BACKUP SLIDES

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Channel 84 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 84, 670.35 cm-1 , 35 hPa
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Channel 247 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 247 720.35 cm-1 , 40 hPa
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Channel 244 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 244, 719.47 cm-1 , 150 hPa
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Channel 241 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 241, 718.58 cm-1 , 340 hPa
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Channel 239 North Africa Mapped CC – Calc (ECMWF) Differences

  • Channel 239, 717.99 cm-1 , 490 hPa
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Channel 84 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 84, 670.35 cm-1 , 35 hPa
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Channel 247 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 247 720.35 cm-1 , 40 hPa
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Channel 245 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 245, 719.76 cm-1 , 100 hPa
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Channel 244 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 244, 719.47 cm-1 , 150 hPa
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Channel 241 South America Mapped CC – Calc (ECMWF) Differences

  • Channel 241, 718.58 cm-1 , 340 hPa
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Mapped Calc(ECMWF) - CC Radiances Asia Channel 79 Channel 79 668.79 cm-1 12 hPa

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ARM-CART SGP

  • 35°

30’ N, 95° 57’ W

  • Mixed grassland, bare soil
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ARM-CART SGP

  • CC – Calculated using retrieved states