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Version 5 Statistical Analysis Thomas Hearty L2 Stats p.1/31 - - PowerPoint PPT Presentation

May 19, 2023 158 likes •485 views

National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California Version 5 Statistical Analysis Thomas Hearty L2 Stats p.1/31 Outline National Aeronautics and Space

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SLIDE 1 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Version 5 Statistical Analysis

Thomas Hearty

L2 Stats – p.1/31

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SLIDE 2 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Outline

Temperature, water vapor comparisons: V4, V5, and ECMWF . A little bit on clouds. Unrealistic Geophysical Conditions identified in Version 4.

L2 Stats – p.2/31

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SLIDE 3 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Geographic Regions

−90 90 180 −90 −30 30 90

Polar Ice Cold Season Land Warm Season Land Non−Frozen Ocean

2002.09.06

Cryptic abbreviations NFO = Non-Frozen Ocean WSL = Warm Season Land

L2 Stats – p.3/31

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SLIDE 4 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Yield: Global Temperature

v4.0.9NoHSB, TEMPSLAB_GLOBAL: Qual_* = 0 or 1: 324000

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_GLOBAL: Qual_* = 0 or 1: 324000

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

The yield for temperature retrievals increased in most of the atmosphere. The yield for Surface Temperature retrievals increased (over land and ice). There may be a slight decreasing trend in the yield (over land).

L2 Stats – p.4/31

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SLIDE 5 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Decreasing trend in the yield

Yield v4.0.9stdNoHSBTEMP_GLOBAL

Jan-2003 Jan-2004 Jan-2005 28 30 32 34 36 38 40 42

Percent

Yield v5.0.11stdNoHSBblTEMP_GLOBAL

Jan-2003 Jan-2004 Jan-2005 48 49 50 51 52 53 54

Percent

There is a decreasing trend in the temperature yield (mostly over land). But it is smaller than the seasonal variation from Version 4.

L2 Stats – p.5/31

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SLIDE 6 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Yield: NFO Temperature

v4.0.9NoHSB, TEMPSLAB_NFO: Qual_* = 0 or 1: 173886

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_NFO: Qual_* = 0 or 1: 173884

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

The yield increased in the troposphere.

L2 Stats – p.6/31

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SLIDE 7 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Yield: WSL Air Temperature

v4.0.9NoHSB, TEMPSLAB_WSL: Qual_* = 0 or 1: 59436

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_WSL: Qual_* = 0 or 1: 59435

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

There were larger increases in the yield over land. There is a decreasing trend in the yield (but it is smaller than the seasonal variation in yield from Version 4).

L2 Stats – p.7/31

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SLIDE 8 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Yield: Polar Ice Temperature

v4.0.9NoHSB, TEMPSLAB_POLAR_ICE: Qual_* = 0 or 1: 60291

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_POLAR_ICE: Qual_* = 0 or 1: 60291

20 40 60 80 100 1000 100

Pressure [mbar] Percent

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

The largest increase in yield was in polar regions.

L2 Stats – p.8/31

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SLIDE 9 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

NFO Air Temperature

v4.0.9NoHSB, TEMPSLAB_NFO: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_NFO: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

The increasing trend in the temperature bias is still in Version 5. There is a decreasing trend ∼ 500 mbar.

L2 Stats – p.9/31

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SLIDE 10 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

NFO Air Temperature Trend

v4.0.9.0, TEMPSLAB_NFO: P0968.54

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

  • 0.3
  • 0.2
  • 0.1

0.0 0.1

TAirSup - ECMWF

slope = 0.1281± 0.0142 CC = 0.70

v5.0.11.0, TEMPSLAB_NFO: P0968.54

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

  • 0.4
  • 0.3
  • 0.2
  • 0.1

0.0 0.1

TAirSup - ECMWF

slope = 0.1286± 0.0261 CC = 0.85

Time Varying CO2 did not remove this trend identified by Divakarla et al. Similar trends are seen in the Microwave Only and AIRS Only Retrievals.

L2 Stats – p.10/31

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SLIDE 11 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

NFO Air Temperature Trend

v4.0.9.0, TEMPSLAB_NFO: P0544.19

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

0.1 0.2 0.3 0.4 0.5

TAirSup - ECMWF

slope = -0.0756± 0.0136 CC = -0.39

v5.0.11.0, TEMPSLAB_NFO: P0544.19

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

0.20 0.25 0.30 0.35 0.40

TAirSup - ECMWF

slope = -0.0518± 0.0150 CC = -0.27

The opposite slopes are almost identical at ∼ 500 mbar.

L2 Stats – p.11/31

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SLIDE 12 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

WSL Air Temperature

v4.0.9NoHSB, TEMPSLAB_WSL: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_WSL: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

significantly less bias in the troposphere. There is still a decreasing trend in the temperature bias over land. Version 5 Land Surface Temperature is warmer than Version 4.

L2 Stats – p.12/31

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SLIDE 13 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

WSL Air Temperature Trend

v4.0.9.0, TEMPSLAB_WSL: P0968.54

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

0.0 0.2 0.4 0.6 0.8

TAirSup - ECMWF

slope = -0.0666± 0.0336 CC = 0.08

v5.0.11.0, TEMPSLAB_WSL: P0968.54

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

0.0 0.2 0.4 0.6

TAirSup - ECMWF

slope = -0.1076± 0.0521 CC = 0.08

The trend temperature bias trend over land has a negative slope?!

L2 Stats – p.13/31

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SLIDE 14 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

WSL Air Temperature Trend 544 mbar

v4.0.9.0, TEMPSLAB_WSL: P0544.19

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

  • 0.1

0.0 0.1 0.2 0.3

TAirSup - ECMWF

slope = -0.1268± 0.0160 CC = -0.66

v5.0.11.0, TEMPSLAB_WSL: P0544.19

Jan-2003 Jan-2004 Jan-2005 370 375 380 385

GLB CO2 ppmv

  • 0.1

0.0 0.1 0.2 0.3

TAirSup - ECMWF

slope = -0.1098± 0.0259 CC = -0.50

Same slope as seen over water.

L2 Stats – p.14/31

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SLIDE 15 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Polar Ice Temperature

v4.0.9NoHSB, TEMPSLAB_POLAR_ICE: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, TEMPSLAB_POLAR_ICE: Qual_* = 0 or 1

  • 2
  • 1

1 2 1000 100

Pressure [mbar] AIRS - ECMWF [K]

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

Version 5 has a larger bias and RMS over the pole (but the yield is ∼ 90%)

L2 Stats – p.15/31

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SLIDE 16 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California Air Temperature Error Estimates

Chi2 v4.0.9stdNoHSB, TEMP_NFO: Qual_* = 0 or 1: 173886

2 4 6 8 10 12 14 1000 100

Pressure [mbar] Chi2

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040427 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041129 FD20041223 FD20050116 FD20050209 FD20050305 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

Chi2 v5.0.11stdNoHSBbl, TEMP_NFO: Qual_* = 0 or 1: 173884

2 4 6 8 10 12 14 1000 100

Pressure [mbar] Chi2

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030831 FD20031018 FD20031205 FD20040310 FD20040427 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

The Version 4 error estimates are significantly better than those in version 4. The errors are evaluated by calculating the reduced χ2 where, χ2 = Σ( TAIRS−TECMW F

Terr

)2.

L2 Stats – p.16/31

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SLIDE 17 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Surface Temperature biases

v4.0.9stdNoHSBTEMP_NFO Surface Temperature

  • 10
  • 5

5 10

AIRS - ECMWF

1000 2000 3000

Number

FD20020906: -0.72± 1.38 FD20020929: -0.67± 1.27 FD20021023: -0.71± 1.30 FD20021116: -0.98± 1.73 FD20021210: -1.01± 2.09 FD20030103: -0.95± 2.17 FD20030127: -0.71± 1.84 FD20030220: -0.60± 1.54 FD20030316: -0.54± 1.21 FD20030409: -0.63± 1.19 FD20030503: -0.65± 1.29 FD20030527: -1.00± 1.89 FD20030620: -1.15± 1.83 FD20030714: -1.01± 1.77 FD20030807: -0.93± 1.83 FD20030831: -0.72± 1.45 FD20030924: -0.66± 1.33 FD20031018: -0.55± 1.22 FD20031205: -0.89± 1.88 FD20040122: -0.74± 1.85 FD20040215: -0.51± 1.35 FD20040310: -0.58± 1.18 FD20040403: -0.74± 1.16 FD20040427: -0.70± 1.17 FD20040614: -1.27± 2.08 FD20040801: -1.10± 1.91 FD20040825: -0.82± 1.52 FD20040918: -0.75± 1.31 FD20041012: -0.61± 1.31 FD20041105: -0.66± 1.32 FD20041129: -0.85± 1.90 FD20041223: -0.80± 1.96 FD20050116: -0.70± 1.65 FD20050209: -0.72± 1.77 FD20050305: -0.49± 1.19 FD20050329: -0.71± 1.15 FD20050422: -0.63± 1.17 FD20050516: -0.69± 1.46 FD20050609: -1.36± 2.05 FD20050727: -0.82± 1.64 FD20050913: -0.70± 1.28 FD20051007: -0.72± 1.35 FD20051031: -0.82± 1.46 FD20051218: -0.80± 1.81

v5.0.11stdNoHSBblTEMP_NFO Surface Temperature

  • 10
  • 5

5 10

AIRS - ECMWF

1000 2000 3000 4000

Number

FD20020906: -0.75± 1.82 FD20020929: -0.67± 1.87 FD20021116: -1.41± 2.66 FD20030103: -1.52± 3.30 FD20030220: -0.78± 1.91 FD20030409: -0.64± 1.45 FD20030527: -1.19± 2.24 FD20030831: -0.82± 2.10 FD20031018: -0.68± 1.86 FD20031205: -1.68± 3.28 FD20040310: -0.62± 1.64 FD20040427: -0.77± 1.42 FD20040614: -1.91± 2.86 FD20040801: -1.37± 2.36 FD20040918: -0.88± 1.98 FD20041105: -1.04± 2.29 FD20041223: -1.64± 3.48 FD20050209: -0.99± 2.40 FD20050329: -0.72± 1.48 FD20050516: -0.82± 1.81 FD20051007: -0.86± 1.97

Version 5 SST is colder than Version 4.

L2 Stats – p.17/31

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SLIDE 18 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Error Estimates for Sea Surface Temp

Chi2 v4.0.9stdNoHSBTEMP_NFO Surface Temperature

  • 10
  • 5

5 10

(AIRS - ECMWF) / Err

1000 2000 3000 4000

Number

FD20020906: 2.16 FD20020929: 1.82 FD20021023: 1.98 FD20021116: 3.56 FD20021210: 4.30 FD20030103: 4.88 FD20030127: 3.65 FD20030220: 2.69 FD20030316: 1.54 FD20030409: 1.60 FD20030503: 1.98 FD20030527: 4.54 FD20030620: 4.59 FD20030714: 4.01 FD20030807: 3.72 FD20030831: 2.36 FD20030924: 1.96 FD20031018: 1.54 FD20031205: 3.67 FD20040122: 3.38 FD20040215: 1.80 FD20040310: 1.52 FD20040403: 1.69 FD20040427: 1.65 FD20040614: 6.15 FD20040801: 4.93 FD20040825: 2.84 FD20040918: 2.01 FD20041012: 1.79 FD20041105: 1.82 FD20041129: 3.65 FD20041223: 3.99 FD20050116: 2.99 FD20050209: 3.53 FD20050305: 1.41 FD20050329: 1.62 FD20050422: 1.53 FD20050516: 2.29 FD20050609: 6.22 FD20050727: 3.35 FD20050913: 1.85 FD20051007: 2.07 FD20051031: 2.50 FD20051218: 3.19

Chi2 v5.0.11stdNoHSBblTEMP_NFO Surface Temperature

  • 10
  • 5

5 10

(AIRS - ECMWF) / Err

500 1000 1500 2000 2500 3000

Number

FD20020906: 2.32 FD20020929: 2.30 FD20021116: 2.63 FD20030103: 2.34 FD20030220: 2.33 FD20030409: 2.34 FD20030527: 2.56 FD20030831: 2.16 FD20031018: 2.16 FD20031205: 2.35 FD20040310: 2.10 FD20040427: 2.48 FD20040614: 2.07 FD20040801: 2.23 FD20040918: 2.29 FD20041105: 2.45 FD20041223: 2.44 FD20050209: 2.14 FD20050329: 2.15 FD20050516: 2.32 FD20051007: 2.14

The outliers got correspondingly larger error estimates.

L2 Stats – p.18/31

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SLIDE 19 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California Sea Surface Temperature Outliers

Outliers v4.0.9stdNoHSBTEMP_GLOBAL

Jan-2003 Jan-2004 Jan-2005 1 2 3 4

Percent

Outliers v5.0.11stdNoHSBblTEMP_GLOBAL

Jan-2003 Jan-2004 Jan-2005 1 2 3 4 5 6

Percent

Version 5 has more mild outliers (black line). Both version have about the same amount of extreme outliers (red line).

L2 Stats – p.19/31

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SLIDE 20 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Outlier Spatial Distribution

TSurfStd QS01 Outliers dayv4.0.9.0stdstdNoHSB_2003.07.14

  • 90

90 180

  • 90
  • 30

30 90

  • 10
  • 6
  • 3

3 6 10

TSurfStd QS01 Outliers dayv5.0.11.0stdstdNoHSBbl_2003.07.14

  • 90

90 180

  • 90
  • 30

30 90

  • 10
  • 6
  • 3

3 6 10

TSurfStd QS01 Outliers dayv4.0.9.0stdstdNoHSB_2004.01.22

  • 90

90 180

  • 90
  • 30

30 90

  • 10
  • 6
  • 3

3 6 10

TSurfStd QS01 Outliers dayv5.0.11.0stdstdNoHSBbl_2004.01.22

  • 90

90 180

  • 90
  • 30

30 90

  • 10
  • 6
  • 3

3 6 10

The outliers over land tend to be warm. The outliers over ocean tend to be cold.

L2 Stats – p.20/31

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SLIDE 21 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

TSurfAir at the poles

Dome C TSurfAir v4.0.9

Apr-2005 Jul-2005 Oct-2005 190 200 210 220 230 240 250 Temperature [K]

Dome C TSurfAir v5.0.11

Apr-2005 Jul-2005 Oct-2005 190 200 210 220 230 240 250 Temperature [K]

Dome C TSurfAir v4.0.9

Apr-2005 Jul-2005 Oct-2005

  • 20
  • 10

10 20 (AIRS - Truth) [K]

Dome C TSurfAir v5.0.11

Apr-2005 Jul-2005 Oct-2005

  • 20
  • 10

10 20 (AIRS - Truth) [K]

Black symbols are the 3 meter high temperature at Dome C. Filled red circles are TSurfAir with Qual_Surf = 0 or 1. Open circles are TSurfAir with Qual_Surf = 2.

L2 Stats – p.21/31

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SLIDE 22 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Spurious Clouds Over Desert

blendv4.0.9.0_20030714 CldFrcStd gran 127

  • 4

4 12 16 24 32 0.0 0.2 0.3 0.5 0.7 0.8 1.0

blendv5.0.11.0_20030714 CldFrcStd gran 127

  • 4

4 12 16 24 32 0.0 0.2 0.3 0.5 0.7 0.8 1.0

Fewer spurious clouds over the desert. Could the spurious clouds be dust storms?

L2 Stats – p.22/31

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SLIDE 23 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Angola

blendv4.0.9.0_20030714 CldFrcStd gran 126

8 16

  • 12
  • 4

4 12 0.0 0.2 0.3 0.5 0.7 0.8 1.0

blendv5.0.11.0_20030714 CldFrcStd gran 126

8 16

  • 12
  • 4

4 12 0.0 0.2 0.3 0.5 0.7 0.8 1.0

We are detecting more thin clouds over vegetated areas. But fewer thick low clouds over ocean.

L2 Stats – p.23/31

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SLIDE 24 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Low Clouds over the Ocean

blendv4.0.9.0_20030714 CldFrcStd gran 191

  • 92
  • 84
  • 76
  • 32
  • 24
  • 16
  • 8

0.0 0.2 0.3 0.5 0.7 0.8 1.0

blendv5.0.11.0_20030714 CldFrcStd gran 191

  • 92
  • 84
  • 76
  • 32
  • 24
  • 16
  • 8

0.0 0.2 0.3 0.5 0.7 0.8 1.0

blendv4.0.9.0_20030714 TSurfStd-ECMWF gran 191with Qual_Surf

  • 84
  • 76
  • 32
  • 24
  • 16
  • 8
  • 10
  • 6
  • 3

3 6 10

blendv5.0.11.0_20030714 TSurfStd-ECMWF gran 191with Qual_Surf

  • 84
  • 76
  • 32
  • 24
  • 16
  • 8
  • 10
  • 6
  • 3

3 6 10

blendv4.0.9.0_20030714191

4 6 8 10 12 14 Wavelength [µm] 200 220 240 260 280 300 320 340 Brightness Temperature [K]

Spec 1 Spec 2 Spec 3 Spec 4

L2 Stats – p.24/31

slide-25
SLIDE 25 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Global Qual_H2O = 0 or 1

v4.0.9NoHSB, H2OSLAB_GLOBAL: Qual_H2O = 0 or 1

  • 100
  • 50

50 100

100 × (Retrieved - ECMWF)/ECMWF

1000 100

Pressure [mbar]

FD20020906 FD20020929 FD20021023 FD20021116 FD20021210 FD20030103 FD20030127 FD20030220 FD20030316 FD20030409 FD20030503 FD20030527 FD20030620 FD20030714 FD20030807 FD20030831 FD20030924 FD20031018 FD20031205 FD20040122 FD20040215 FD20040310 FD20040403 FD20040614 FD20040801 FD20040825 FD20040918 FD20041012 FD20041105 FD20041223 FD20050116 FD20050209 FD20050329 FD20050422 FD20050516 FD20050609 FD20050727 FD20050913 FD20051007 FD20051031 FD20051218

v5.0.11NoHSBbl, H2OSLAB_GLOBAL: Qual_H2O = 0 or 1

  • 100
  • 50

50 100

100 × (Retrieved - ECMWF)/ECMWF

1000 100

Pressure [mbar]

FD20020906 FD20020929 FD20021116 FD20030103 FD20030220 FD20030409 FD20030527 FD20030714 FD20030831 FD20031018 FD20031205 FD20040122 FD20040310 FD20040614 FD20040801 FD20040918 FD20041105 FD20041223 FD20050209 FD20050329 FD20050516 FD20051007

Yield for Qual_H2O in version 5 reduced from ∼ 82% → ∼ 78% Upper tropospheric dry bias improved lower tropospheric wet bias improved.

L2 Stats – p.25/31

slide-26
SLIDE 26 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Global Qual_H2O = 0 or 1

v4.0.9.0 H2OCDSup, H2OSLAB_GLOBAL: P0262.80

Jan-2003 Jan-2004 Jan-2005

  • 5

5 10 15 100 × (AIRS - ECMWF)/ECMWF

v5.0.11.0 H2OCDSup, H2OSLAB_GLOBAL: P0262.80

Jan-2003 Jan-2004 Jan-2005 5 10 15 20 100 × (AIRS - ECMWF)/ECMWF

There is a decreasing trend in the H2O bias. Needs more investigation.

L2 Stats – p.26/31

slide-27
SLIDE 27 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

H2O Error Estimates

Chi2 v4.0.9stdNoHSBH2O0_GLOBAL totH2OStd

  • 10
  • 5

5 10

(AIRS - ECMWF) / Err

2000 4000 6000 8000 10000

Number

FD20020906: 18.79 FD20020929:15.60 FD20021023:16.82 FD20021116:17.40 FD20021210:19.25 FD20030103:20.70 FD20030127:17.93 FD20030220:17.47 FD20030316:24.88 FD20030409:23.20 FD20030503:26.13 FD20030527:20.55 FD20030620:20.28 FD20030714:21.04 FD20030807:15.49 FD20030831:24.17 FD20030924:17.86 FD20031018:16.97 FD20031205:17.68 FD20040122:18.44 FD20040215:20.00 FD20040310:22.01 FD20040403:19.31 FD20040427:17.43 FD20040614:20.50 FD20040801:16.54 FD20040825:20.85 FD20040918:18.49 FD20041012:17.38 FD20041105:17.48 FD20041129:17.07 FD20041223:17.74 FD20050116:17.44 FD20050209:16.85 FD20050305:16.49 FD20050329:23.18 FD20050422:16.58 FD20050516:22.10 FD20050609:19.99 FD20050727:19.31 FD20050913:19.02 FD20051007:15.14 FD20051031:15.76 FD20051218:19.96

Chi2 v5.0.11stdNoHSBblH2O0_GLOBAL totH2OStd

  • 10
  • 5

5 10

(AIRS - ECMWF) / Err

2.0•103 4.0•103 6.0•103 8.0•103 1.0•104 1.2•104

Number (AIRS - ECMWF) / Err

FD20020906: 2.22 FD20020929: 2.05 FD20021116: 2.23 FD20030103: 3.44 FD20030220: 2.01 FD20030409: 2.09 FD20030527: 1.85 FD20030831: 1.89 FD20031018: 2.28 FD20031205: 2.23 FD20040310: 2.54 FD20040427: 2.21 FD20040614: 1.87 FD20040801: 2.01 FD20040918: 2.21 FD20041105: 2.25 FD20041223: 2.34 FD20050209: 2.29 FD20050329: 2.62 FD20050516: 2.41 FD20051007: 2.13

The improved χ distribution suggests improved error estimates.

L2 Stats – p.27/31

slide-28
SLIDE 28 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Conclusions

The Version 5 yield increased over land and ice covered surfaces. Temperature and Water Vapor Error estimates are better than in Version 4. Spurious clouds and high water vapor over warm surfaces is fixed. There is a slight decreasing trend in the yield. Version 5 detects fewer low clouds over ocean. Sometimes we retrieve a surface temperature but there is not an error estimate. V5 has more -9999s.

L2 Stats – p.28/31

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SLIDE 29 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Extra Slides

L2 Stats – p.29/31

slide-30
SLIDE 30 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

High Water Vapor

blendv4.0.9.0_20030714 totH2OStd gran 128with Qual_H2O

  • 12
  • 4

4 12 36 44 52 10 25 40 55 70 85 100

blendv5.0.11.0_20030714 totH2OStd gran 128with Qual_H2O

  • 12
  • 4

4 12 36 44 52 10 25 40 55 70 85 100

Fewer high H2O retrievals over warm scenes.

L2 Stats – p.30/31

slide-31
SLIDE 31 National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California

Land Surface Temperature

blendv4.0.9.0_20030714 TSurfStd gran 128

  • 12
  • 4

4 12 36 44 52 287 293 299 305 311 317 324

blendv5.0.11.0_20030714 TSurfStd gran 128

  • 12
  • 4

4 12 36 44 52 287 293 299 305 311 317 324

blendv4.0.9.0_20030714 TSurfStdErr gran 128with Qual_Surf

  • 12
  • 4

4 12 36 44 52 0.0 1.7 3.3 5.0 6.7 8.3 10.0

blendv5.0.11.0_20030714 TSurfStdErr gran 128with Qual_Surf

  • 12
  • 4

4 12 36 44 52 0.0 1.7 3.3 5.0 6.7 8.3 10.0

blendv5.0.11.0_20030714 TSurfStd ECMWF gran 128

  • 12
  • 4

4 12 36 44 52 287 293 299 305 311 317 324

L2 Stats – p.31/31