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TOVS Path-P

TOVS Path-P. Axel Schweiger Polar Science Center University of Washington (Given by Jeff Key , NOAA/NESDIS, Madison). Path-P is a derivative of Path-B with polar modifications Processed north of 60 N, 1979-2004, 100 km grid, daily, monthly

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TOVS Path-P

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  1. TOVS Path-P Axel SchweigerPolar Science CenterUniversity of Washington(Given by Jeff Key, NOAA/NESDIS, Madison) • Path-P is a derivative of Path-B with polar modifications • Processed north of 60 N, 1979-2004, 100 km grid, daily, monthly • Temperature and humidity profiles, cloud fraction, cloud height

  2. Current Path-P Activities • Compilation of Collocation Data Set (1979-2004) • Radiosondes (multiple data sets) • EECRA (surface cloud observations, 1979-1996) • Lidar/Radar cloud obs. from (SHEBA, Barrow, SGP) • Snow and Ice Charts (NSIDC) • HIRS/MSU (Brightness Temperatures) • Area N40 + SGP, possible future expansion • Rework of cloud algorithm • Adjustment of thresholds, validation • Additional tests (e.g. 7.2 -11 μm after Liu et. al. ) • Recomputation of Radiance Bias Adjustments • Eventual reprocessing • Will allow point by point comparison of surface cloud observations with HIRS/MSU-derived.

  3. 1980 2001 1980 2001 TPP and APP-X WinterDJF SpringMAM -4 %/dec -7%/dec +5%/dec +4%/dec

  4. 1980 2001 1980 2001 TPP and APP-X1980-2001(1982-1999) SummerJJA FallSON

  5. APP-X vs. TOVS Path-P: JJA, Beaufort Sea APP-X TOVS Path-P (From J. Francis)

  6. ERA-40 Winter (DJF) Total Cloud Fraction (1980-2001) 57 01 Trend %/decade 12%/decade

  7. ERA-40 and TPP Cloud Fraction Spring (MAM)

  8. ISCCP D1 TOVS Path-P Summer Winter

  9. ISCCP D1 Clear Sky Composite vs Surface Obs

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