Th HOAPS 3 li t lThe HOAPS-3 climatologyThe HOAPS-3 climatologygyStephan Bakan1 Axel Andersson1 Karsten Fennig3 Hartmut Grassl2 Christian Klepp2 Jörg Schulz4Stephan Bakan1, Axel Andersson1, Karsten Fennig3, Hartmut Grassl2, Christian Klepp2, Jörg Schulz4

1 Max Planck Institute for Meteorology Hamburg 2 University of Hamburg 3 German Weather Service (DWD) Offenbach 4EUMETSAT Darmstadt all GermanyMax Planck Institute for Meteorology, Hamburg University of Hamburg, German Weather Service (DWD), Offenbach, EUMETSAT, Darmstadt, all Germany

HOAPS H b O At h P t d Fl f S t llit D tHOAPS - Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite DataHOAPS Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data

HOAPS is a climatology of freshwater flux over the global ocean derived SSM/I i t lib tiHOAPS is a climatology of freshwater flux over the global ocean derived SSM/I intercalibration:from satellite data:

• data availability: 1987 2005• data availability: 1987-2005

• precipitation, evaporation and related surface and atmospheric parametersprecipitation, evaporation and related surface and atmospheric parameters

di t b d l biti t llit• radiometers on board polar orbiting satellites:- SSM/I (passive microwave)SSM/I (passive microwave)- AVHRR (infrared SST only)- AVHRR (infrared, SST only)

• state of the art parameter retrieval proceduresp p

h ti i M lti t llit t i i ll SSM/I ti t• homogeneous time series: Multi satellite averages, containing all SSM/I operating at the same time, including inter-sensor calibration, g

Scan based pixel level dataset (HOAPS S)• Scan-based, pixel-level dataset (HOAPS-S)

• gridded (HOAPS-G HOAPS-C) datasets resolution 0 5° pentad and monthly meansgridded (HOAPS G, HOAPS C) datasets , resolution 0.5 , pentad and monthly means, daily compositesdaily composites

• data accessible under: www hoaps org• data accessible under: www.hoaps.org

References:References:A d A C Kl K F i S B k H G ßl d J S h l 2010 ThAndersson, A., C. Klepp, K. Fennig, S. Bakan, H. Graßl, and J. Schulz, 2010: The

St ti ti l h b i ht t t (TB) b iHamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data – HOAPS-3. Statistical approach on brightness temperature (TB) basis:Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data HOAPS 3. Earth Syst Sci Data 1 1 20 doi:10 5194/essdd 3 143 2010 • calibration reference: DMSP F-11Earth Syst. Sci. Data, 1, 1-20, doi:10.5194/essdd-3-143-2010

A d A C Kl K F i S B k H G ßl d J S h l 2010 E l ti

calibration reference: DMSP F 11

10 d f TB d l b l 1° 1° id i f i l lAndersson, A., C. Klepp, K. Fennig, S. Bakan, H. Graßl, and J. Schulz, 2010: Evaluation • 10-day means of TBs averaged on a global 1°x1° grid, rain-free pixels only

of HOAPS-3 ocean surface freshwater flux components. J. Appl. Meteor. Climatol., doi: • match-ups for each channel and satellite with F-11 for one overlapping yearp pp ,0 1175/2010JAMC2341 1 in print

match ups for each channel and satellite with F 11 for one overlapping year

histogram equalization of match ups0.1175/2010JAMC2341.1, in print • histogram-equalization of match-ups

• linear regression for TB calibration coefficients of each channel and satelliteg

D t i h i HOAPS 3 t d l ithData processing chain: HOAPS-3 parameters and algorithms:

Water flux parameters:Water flux parameters:

P i it ti (P):• Precipitation (P):neural net with training data from radiative transfer calculations (ECMWF P Bauer)neural net with training data from radiative transfer calculations (ECMWF, P. Bauer)

Climatological mean global fields (left) and annual cycle of zonalClimatological mean global fields (left) and annual cycle of zonal ( i h ) f i i i i d f h fl (E P)mean (right) of precipitation, evaporation and freshwater flux (E-P)( g ) p p p ( )

Conclusions:Conclusions:

HOAPS 3 i ll d l d t llit li t l f t• HOAPS-3 is a well developed satellite climatology of water • Evaporation (E):

cycle components over the ice free global ocean showing all• Evaporation (E):

cycle components over the ice free global ocean, showing all th k l b l li t l i l f t d i l d t il–Bulk formula: E = (ρ /ρ ) C U (q – q ) the known global climatological features and regional details–Bulk formula: E = (ρa/ρw) CE U (qs – qa)

HOAPS 3 i bli l il bl f h• Wind speed (U) (neural net)

•HOAPS 3 is publicly available from www.hoaps.orgWind speed (U) (neural net)

N f ifi h idit ( ) (B t t l 2003)p y p g

• Near surface specific humidity (qa) (Bentamy et al., 2003)• In near future, some of the core HOAPS products will be

a

• Sea surface saturation specific humidity (q ) (SST Magnus formula) In near future, some of the core HOAPS products will be routinely provided by the Eumetsat Climate Monitoring

• Sea surface saturation specific humidity (qs) (SST, Magnus formula)routinely provided by the Eumetsat Climate Monitoring • Latent heat transfer coefficient (CE) (COARE; Fairall et. al., 1996/2003)Satellite Application Facility (CM-SAF, www.cmsaf.eu) at the

( E) ( ; , )

F h t Fl E P Satellite Application Facility (CM SAF, www.cmsaf.eu) at the German Weather Service (DWD)

• Freshwater Flux: E-PGerman Weather Service (DWD)