AMSR-E Ocean Rainfall Algorithm Status C Kummerow Colorado

AMSR-E Ocean Rainfall Algorithm Status C. Kummerow Colorado State University AMSR-E Science Team Meeting Asheville, NC 27 -28 June, 2011

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

GPROF 2010 (Ocean) GPROF 2010 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 ± 1 K 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 apriori database.

Cloud profile database is partitioned into separate SST and TPW bins

GPROF 2010 Status • Databases created based upon PR/TMI. Change from GPROF 2008 to GPROF 2010 is TRMM V 7 products. • Delivered TMI V 7 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 Processing Algorithm Pre-Processors Sensor Data Spacecraft position Pixel Location Pixel Time, Tbs, EIA TMI_L 1 C TMI_1 B 11 AME_L 1 B AME_L 2 A SSMI_L 1 C GPROF 10 input file Profile Databases Land - All Coast – SSM/I Ocean - Each Sensor Input Data GPROF 2010 Ancillary Info SST directory spec Ancillary dir spec Sat, Sensor Info Channel Freqs, Errs Profile dbase names Ancillary Datasets Elevation Land masks Sea Surface Temp Clustered Profiles Native Binary Output Temporary Files Programs Output Files Format Converter* HDF-EOS Net. CDF

GPROF 2010 Complete Parameter List Orbit Header Scan Header Pixel Data Satellite Sensor Algorithm Version Pre Processor Version Ocean. Database 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. Date Space. Craft Lat Space. Craft Lon Space. Craft Altitude Latitude, Longitude Pixel Status, Surface Type, Quality Flag Land Ambiguous Flag, Screen Flag Ocean Extended. Dbase, Search. Radius Freezing Height Index Chi. Squared 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

Jan 2007 TMI AMSR-E

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

Jan 2007 TMI AMSR-E TM I

AMSR-E SSMI F 13 Jan 2007

Jan 2007 For 2007: F 13 F 14 F 15 AMSR -E Equatorial Crossing times 18: 30 18: 00 20: 30 13: 30

Jan 2007 GPROF 2010 Surface Precipitation (Liquid+Frozen)

Jan 2007 GPROF 2010 Convective Rain

Jan 2007 GPROF 2010 Probability of Precipitation

Jan 2007 GPROF 2010 Cloud Water Path

Jan 2007 GPROF 2010 Rain Water Path

Jan 2007 GPROF 2010 Ice Water Path

Jan 2007 GPROF 2010 Freezing Height

Jan 2007 GPROF 2010 Sea Surface Temperature

Jan 2007 GPROF 2010 Total Precipitable Water

Jan 2007 GPROF 2010 Wind Speed

Jan 2007 GPROF 2010 Surface Type

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

GPROF 2010 Complete Parameter List Orbit Header Scan Header Pixel Data Satellite Sensor Algorithm Version Pre Processor Version Ocean. Database 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. Date Space. Craft Lat Space. Craft Lon Space. Craft Altitude Latitude, Longitude Pixel Status, Surface Type, Quality Flag Land Ambiguous Flag, Screen Flag Ocean Extended. Dbase, Search. Radius Freezing Height Index Chi. Squared 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

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

Hurricane Floyd Sep 3, 1999 TMI Algorithm Comparison 0. 25 x 0. 25 gridded GPROF 2008 1. 28 mm/day RSS 0. 96 mm/day GSmap 0. 99 mm/day