reanalysis hydrologic cycle panel

Roads, 2003: Hydrologic Cycle, Reanalysis

Reanalysis Hydrologic Cycle Panel

GEWEX, CEOP overview– J. Roads

Remote Sensing– F. R. Roberston

MAPS Regional model assimilation of snow– S. Benjamin

Hydrologic Applications– C. Ropelewski

General Discussion– All

Water and Energy Cycle Research

cf. A. Schlosser


GEWEX Program Elements


CSE Annual Mean Climates(Roads et al. 2002. J. Hydrometeorology; Roads 2002; GEWEX News. Lawford et al., 2004?: BAMS-submitted)


Reanalysis would contribute to:

Individual CSE hydrometeorological studies– MAGS, GAPP, LB A, BALTEX, GAME, MDB and

others (e.g. AMMA, La Plata) GHP hydrometeorological studies

– WEBs (Global Water and Energy Budget studies)– WRAP (Global Water Resource Application Project)– CEOP (Coordinated Enhanced Observing Period)– SCW (Sources and Cycling of Water)– PRED (Hydrometeorological Predictability)– EX (Hydrometeorological Extremes)– Transferability (regional and global)

GHP WEBS (in progress)

-140 -120 -10050

60

70

10 20 30 40

50

60

70

80 90 10020

30

40

110 115 120 12525

30

35

40

100 120 14040

60

80

-120 -100 -80

15

30

45

60

180 -120 -60 0 60 120 180-90

-60

-30

0

30

60

90

100 110 120

0

10

20

-80 -70 -60 -50

-20

-10

0

10

-70 -60 -50 -40-40

-30

-20

-10

-10 0 100

10

20

30

140 145 150

-36

-32

-28

-24

MAGS BALTEX GAME-TIBET GAME-HUBEX GAME-SIBERIAGAME-SIBERIA

GAPP

GLOBAL

GAME-TROPICSGAME-TROPICS

LBA LA PLATA AMMA MDBMDB

1996-99 Annual Mean Precipitation

mm/day0 1 2 3 4 5 6

0 60 E 120 E 180 120 W 60 W 090 S

60 S

30 S

0

30 N

60 N

90 N

0 60 E 120 E 180 120 W 60 W 090 S

60 S

30 S

0

30 N

60 N

90 N

0 60 E 120 E 180 120 W 60 W 090 S

60 S

30 S

0

30 N

60 N

90 N

1996-1999 Annual Means, Precip 1996-1999 Annual Means, Precip

(a)

(b)

(c)(c)

mm/day

0 1 2 3 4 5 6


REANII Hydrologic Cycle (land region)


CEOP is an internationally coordinated hydrometeorological data production & research pilot effort (Jul. 1, 2001-Dec. 31, 2004)

Remote Sensing/Data Integration

U. Tokyo

User

500 TB

UCAR

In Situ

0.1 TB

4DDA

MPIM

50 TB

Goddard

GLDAS

5+? TB


Initial Energy ComparisonsRoads, J., M. Bosilovich, M. Kanamitsu, M. Rodell, 2003: CEOP Pilot Data

Comparisons. CEOP Newsletter 3, 2-5.

0

25

50

75

100

-100

0

100

200

300

400

-300

-150

0

150

300

-100

0

100

200

300

400

-300

-200

-100

0

100

-200

0

200

400

600

800

285

290

295

300

-200

-100

0

100

CEOP MOLTS Avg 3-Hourly Cycle Stn #12 (BERMS), 7/2001-9/2001Energy BudgetEnergy Budget

ENP DAO GLD OBSOBS

(a) LP (b) SH

(c) HC (d) LE

(e) QR (f) QRS

(g) Ts (h) G(h) G

0z 3z 6z 9z 12z 15z 18z 21z21z 0z 3z 6z 9z 12z 15z 18z 21z21z




•HC•Main balance of QR although LP also contributes•Need CpdT/dt computation

•QR•Substantial diurnal cycle in atmospheric cooling ~ 0 during early afternoon, as well as surface heating.

•G•Ground heated by subsurface flux during night and cooled during day again need to look at obs.


Summary A continuing reanalysis project would help us to better define the

global hydrologic cycle and link to a global community of researchers evaluating and utilizing reanalysis products for a wide variety of hydrologic research and application studies– Diurnal to interannual time scales at high temporal, spatial resolution

are of major concern To fully analyze the hydrologic cycle, reanalysis should disseminate:

– Input and verifying observations– 3 hourly analysis and first guess files– Continuous accumulations of hydrologic components

• Moist. Conv., as well as Precip, Evap., runoff, snowmelt, etc.– Storage Terms

• Water vapor, soil moisture, snow, etc.– Associated energy terms

reanalysis hydrologic cycle panel

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