Presentation on theme: "UPDATES OF LARGE & YEAGER (2004) DATA SET FROM CORE I v.1 (NYF) AND CORE II v.1 (IAF) OUTLINE: - CORE II v.2 (IAF) per Hobart WGOMD Meeting, - FUTURE PLANS,"— Presentation transcript:
UPDATES OF LARGE & YEAGER (2004) DATA SET FROM CORE I v.1 (NYF) AND CORE II v.1 (IAF) OUTLINE: - CORE II v.2 (IAF) per Hobart WGOMD Meeting, - FUTURE PLANS, - PROPOSED SEA-ICE INITIAL CONDITIONS
SUMMARY OF CHANGES FOR CORE II v.2 Completed through year 2004 (2006 by December), Wind speed correction based on QSCAT ( ),* Wind direction adjustments,* Adjust specific humidity instead of relative humidity, Short-wave down is lowered by 5% everywhere (not just +/-30 o ),* Albedo depends on latitude, Bug corrections.
Wind Speed Multiply by R s (, ) Wind Direction Add (, ) 1.1 ci=.1 ci=5 o ccw Most regions within ±5º Increase (up to 1.6) almost everywhere
ZONAL-MEAN WIND STRESS IN THE PACIFIC OCEAN ZONAL STRESSMERIDIONAL STRESS 50 o N EQ 50 o S
W/m 2 mg m 2 s None WindHumidity All QSQS QLQL -53 QEQE QHQH Q as E P R3.5 F as GLOBAL AIR-SEA BALANCES
FUTURE PLANS Submit Manuscript (September), Update through year 2006 when ISCCP-FD is received (August-December), Seasonal and/or inter-annual runoff variability(?), Prepare CORE I v.2 (NYF) accounting for sea-ice.
PROPOSED SEA ICE INITIAL CONDITIONS (Developed by David Bailey at NCAR) Based on ice fraction (IFRAC) data sets from either observations (SSM/I) or another model for any month, day, etc., IFRAC is created on the target model grid, Simple, Portable, Easy to document.
FIELD NORTHERN HS. SOUTHERN HS. Ice Fraction (IFRAC) [0-1] SSM/I SSM/I Ice Thickness [m] 3*IFRAC IFRAC Snow Thickness [m] IFRAC IFRAC Surface Temperature (T s ) [ o C] -18*IFRAC – 2 -3*IFRAC – 2 Internal Ice Energy [J] Linear f(T si,T bot ) Linear f(T si,T bot ) Internal Snow Energy [J] Linear f(T s,T si ) Linear f(T s,T si ) - IFRAC is on the model grid (includes land/ocean mask), - T bot = -1.8 o C, T si is the snow-ice interface temperature, - All other fields (e.g., ice internal stress, ice strength, etc.) are set to zero. JANUARY
Radiation and Precipitation Refs: Beranger et al ; WGASF (2000) 1m/yr ERA15 ISCCP-FD ERA-15 HOAPS G X G X S DO NOT USE NWP (REANALYSIS) PRODUCTS
q(h) bias to SOC ci=.2 g/kg Add q(, ) Usually dry NCEP
AFAF - T F (global) P E IMPLIED NORTHWARD FRESHWATER TRANSPORT (Sv)