1 / 27

AMSR-E Ocean Rainfall Algorithm Status

This update discusses the GPROF 2010 algorithm for AMSR-E ocean rainfall estimation, including its Bayesian approach, convective/stratiform separation, and simplified code. It also addresses the transition from GPROF 2008 to GPROF 2010 and future plans for code implementation.

kgarey
Download Presentation

AMSR-E Ocean Rainfall Algorithm Status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AMSR-E Ocean RainfallAlgorithm Status C. KummerowColorado State University AMSR-E Science Team Meeting Asheville, NC 27-28 June, 2011

  2. Cloud Resolving Model Database GPROF_2004 TRMM PR/TMI & Model Database Bayesian Inversion TB model #1 TB observed TB model #2 TB model #3 ~10 km GPROF_2008 GPROF_2010

  3. GPROF 2010 (Ocean) GPROF2010 continues to be a Bayesian algorithm consisting of: P(R|Tb) = P(Tb|R)•P(R)/P(Tb) No more rain screens. All pixels are compared to database. Bayes’ theorem determines rain or no rain. Consequence: almost all pixels have a very small probability of rain. No more convective/stratiform separation. Only necessary because CRM database was skewed to convective pixels. Entire code is now exceedingly simple. Pixels are classified only by background SST and TPW. Database entries within ±1K in SST and ±2 mm in TPW are searched for potential solutions. Error covariances are established from fit between observed and simulated Tb in the a-priori database.

  4. Cloud profile database is partitioned into separate SST and TPW bins

  5. • Databases created based upon PR/TMI. Change from GPROF 2008 to GPROF 2010 is TRMM V7 products. • Delivered TMI V7 to PPS in mid-June • In house version of AMSR-E code tested for 6 mo. Further testing expected in July 2011 • Ready to work with MSFC starting in August to get code into operations • Need team discussion on output parameters. Currently, pixel level output is only Lat/Lon/Sfc rain/Conv. Rain. GPROF 2010 Status

  6. GPROF 2010 Processing Algorithm Pre-Processors Ancillary Info Sensor Data TMI_L1C TMI_1B11 AME_L1B AME_L2A SSMI_L1C SST directory spec Ancillary dir spec Sat, Sensor Info Channel Freqs, Errs Profile dbase names Spacecraft position Pixel Location Pixel Time, Tbs, EIA GPROF10 input file Ancillary Datasets Profile Databases Elevation Land masks Sea Surface Temp Clustered Profiles Land - All Coast – SSM/I Ocean - Each Sensor GPROF2010 Input Data Native Binary Output Temporary Files Programs Output Files HDF HDF-EOS NetCDF Format Converter*

  7. GPROF 2010 Complete Parameter List Orbit Header Satellite Sensor Algorithm Version Pre Processor Version OceanDatabase Land Database Original file Structure Flag Start Date Creation Date Granule Hgt Layer Top(28) Missing Data N scans N Pixels N layers N species N clusters NHgt Indicies Scan Header ScanDate SpaceCraft Lat SpaceCraft Lon SpaceCraft Altitude Pixel Data Latitude, Longitude Pixel Status, Surface Type, Quality Flag Land Ambiguous Flag, Screen Flag Ocean ExtendedDbase, SearchRadius Freezing Height Index ChiSquared Probability Of Precip Sun Glint Angle Freezing Height Cluster Number(nspecies) Cluster Scale(nspecies) Surface Precipitation (Liquid+ Frozen) Convective Precipitation Surface Rain Cloud Water Path Rain Water Path Ice Water Path Sea Surface Temperature Total Precipitable Water Wind Speed Hydro-Meteor And LH Profiles Cloud Water Rain Water Cloud Ice Snow Water Graupel Latent Heating

  8. Jan 2007 TMI AMSR-E

  9. GPROF 2010 TMI/AMSR-E Coincident matchups Jan – Dec. 2007 accumulations

  10. Jan 2007 TMI TMI AMSR-E

  11. Jan 2007 AMSR-E SSMI F13

  12. Jan 2007 For 2007: F13F14F15AMSR-E Equatorial Crossing times 18:30 18:0020:3013:30

  13. Jan 2007 GPROF 2010 Surface Precipitation (Liquid+Frozen)

  14. Jan 2007 GPROF 2010 Convective Rain

  15. Jan 2007 GPROF 2010 Probability of Precipitation

  16. Jan 2007 GPROF 2010 Cloud Water Path

  17. Jan 2007 GPROF 2010 Rain Water Path

  18. Jan 2007 GPROF 2010 Ice Water Path

  19. Jan 2007 GPROF 2010 Freezing Height

  20. Jan 2007 GPROF 2010 Sea Surface Temperature

  21. Jan 2007 GPROF 2010 Total Precipitable Water

  22. Jan 2007 GPROF 2010 Wind Speed

  23. Jan 2007 GPROF 2010 Surface Type

  24. Jan 1st, 2007 GPROF 2010 Quality Flag 0 = Best Quality 1 = Sun-glint, Bayesian Expansion, Coastal contamination, database expanding 2 = Ambiguous over Land

  25. GPROF 2010 Complete Parameter List Orbit Header Satellite Sensor Algorithm Version Pre Processor Version OceanDatabase Land Database Original file Structure Flag Start Date Creation Date Granule Hgt Layer Top(28) Missing Data N scans N Pixels N layers N species N clusters NHgt Indicies Scan Header ScanDate SpaceCraft Lat SpaceCraft Lon SpaceCraft Altitude Pixel Data Latitude, Longitude Pixel Status, Surface Type, Quality Flag Land Ambiguous Flag, Screen Flag Ocean ExtendedDbase, SearchRadius Freezing Height Index ChiSquared Probability Of Precip Sun Glint Angle Freezing Height Cluster Number(nspecies) Cluster Scale(nspecies) Surface Precipitation (Liquid+ Frozen) Convective Precipitation Surface Rain Cloud Water Path Rain Water Path Ice Water Path Sea Surface Temperature Total Precipitable Water Wind Speed Hydro-Meteor And LH Profiles Cloud Water Rain Water Cloud Ice Snow Water Graupel Latent Heating

  26. Hurricane Floyd September 13, 1999 GPROF 2008 GPROF 2008 + TRMM radar GPROF 2008 example

  27. Hurricane Floyd Sep 3, 1999 TMI Algorithm Comparison 0.25 x 0.25 gridded GPROF2008 1.28 mm/day RSS 0.96 mm/day GSmap 0.99 mm/day

More Related