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 (2000-2004),*

•Wind direction adjustments,*

•Adjust specific humidity instead of relative humidity,

•Short-wave down is lowered by 5% everywhere (not just +/-30o),*

•Albedo depends on latitude,

•Bug corrections.

Wind Speed

Multiply by Rs(,)

Wind Direction

Add (,)

1.1

1.1

ci=.1

ci=5o

ccwMost regions within ±5º

Increase (up to 1.6) almost everywhere

ZONAL-MEAN WIND STRESS IN THE PACIFIC OCEAN

ZONAL STRESS MERIDIONAL STRESS

50oN

EQ

50oS

165E 265E/95W

8N 226 / 223 213 / 215

5N 219 / 214 203 / 196

2N 236 / 239 213 / 217

Equator 238 / 239 238 / 243

2S 235 / 240 245 / 258

5S 222 / 220 238 / 238

8S 211 / 212 231 / 238

SHORT-WAVE DOWN (PACIFIC): 0.95 ISCCP / TAO

(W m-2)

HEAT FLUX DIFFERENCES FROM CORE II v.2

QS QL QH QE Qas

WATER FLUX DIFFERENCES FROM CORE II v.2

R P E Fas

(Direct)

(implied)AQ

TQ

Cool

Heat

IMPLIED NORTHWARD HEAT TRANSPORT (PW)

W/m2

mg m2 s

None Wind Humidity

All

QS 173 165

QL -53 -53

QE -77 -85 -87 -96

QH -13 -14 -14

Qas 30 20 19 2

E -30.6 -33.8 -34.9 -38.3

P 30.5 34.7

R 3.5 3.5

Fas 3.4 0.2 -0.9 -0.1

GLOBAL AIR-SEA BALANCES 1983-2004

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 (Ts) [oC] -18*IFRAC – 2 -3*IFRAC – 2

Internal Ice Energy [J] Linear f(Tsi,Tbot) Linear f(Tsi,Tbot)

Internal Snow Energy [J] Linear f(Ts,Tsi) Linear f(Ts,Tsi)

- IFRAC is on the model grid (includes land/ocean mask),

- Tbot = -1.8oC, Tsi is the snow-ice interface temperature,

- All other fields (e.g., ice internal stress, ice strength, etc.) are set to zero.

JANUARY

JANUARY

JANUARY

Radiation and Precipitation Refs: Beranger et al. 1999 ; 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/kgAdd q(,)

Usuallydry NCEP

AF

- TF (global)

P

E

IMPLIED NORTHWARD FRESHWATER TRANSPORT (Sv)