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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

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
current path p activities
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.
tpp and app x

1980

2001

1980

2001

TPP and APP-X

WinterDJF

SpringMAM

-4 %/dec -7%/dec

+5%/dec +4%/dec

tpp and app x 1980 2001 1982 1999

1980

2001

1980

2001

TPP and APP-X1980-2001(1982-1999)

SummerJJA

FallSON

slide5

APP-X vs. TOVS Path-P: JJA, Beaufort Sea

APP-X

TOVS Path-P

(From J. Francis)

slide8

ISCCP D1

TOVS Path-P

Summer

Winter