Derived Over-Ocean Water Vapor Transport from Retrieved E-P Data Sets
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Transcript of Derived Over-Ocean Water Vapor Transport from Retrieved E-P Data Sets
Derived Over-Ocean Water Vapor Transportfrom Retrieved E-P Data Sets
B.J. Sohn
School of Earth and Environmental SciencesSeoul National University, Seoul, Korea
E-mail: [email protected]
How are we going to use satellite-derived water budget
quantities to validate hydrological cycles revealed in
model reanalysis products, in combination with GAME
data sets?
Comparison of monthly, vertically integrated water and
energy balance components between global 'standard'
data sets and CSE data sets (GEWEX WEBS Initiative 1,
John Roads)
Water Budget Studies from Reanalysis Data
Reanalysis Data ECMWF NCEP
Model analysis approach further needs improvement to reduce the
uncertainties in our knowledge of the global hydrological cycle (e.g.,
atmospheric transport from reanalysis data are short of resolving the
water balance inferred from stream flow data over the river basins in
United States, Roads et al., 2002).
PEdiv(Q)t
(TPW)
divQ = [E-P] , Q = Qd + Qn
divQ = [E-P] = 2[Qd] = -
0
psqvdpQ
(Prof. T.-C. Chen)
Seven Year (1988-94) JFM Mean Climatology [SSM/I]
GAME/SCSMEX AREA(May - June 1998)
95E 100E 105E 110E 115E 120E 125E
EQ
5N
10N
15N
20N
25N
NESA
SESA
Haikou
Tungkong
Shantou
Kings Park
Laoag
Xisha Island
Songkhla
Singapore Kuching
Brunei Airport
Saigon
RAOB-derived divQ vs. SSM/I E-Pover NSEA and SESA (daily average)
PEdp dl g
divQPs
0
)v(q1
Validation against RAOB-Derived Flux Div.
Latitude
90N 60N 30N EQ 30S 60S 90S
Wat
er V
apor
Flu
x (
kg/s
ec/
m)
-80
-60
-40
-20
0
20
40
ECMWF (P) + HOAPS (E)
ECMWF (P) + SSM/I (E)ECMWF (P) + COADS (E)
ECMWF (P) + NCEP (E)ECMWF (P) + ECMWF (E)
NCEP (P) + HOAPS (E)
NCEP (P) + SSM/I (E)
NCEP (P) + COADS (E)NCEP (P) + NCEP (E)
NCEP (P) + ECMWF (E)
SSM/I (P) + HOAPS (E)
SSM/I (P) + SSM/I (E)
SSM/I (P) + COADS (E)
SSM/I (P) + NCEP (E)SSM/I (P) + ECMWF (E)
GPCP (P) + HOAPS (E)
GPCP (P) + SSM/I (E)GPCP (P) + COADS (E)
GPCP (P) + NCEP (E)
GPCP (P) + ECMWF (E)
Seven Year (1988-94) JFM Mean N-S Transport [Ocean]
Longitude60E 80E 100E 120E 140E 160E 180 160W 140W 120W 100W 80W
Wat
er V
apor
Flu
x (
kg/s
ec/
m)
-80
-60
-40
-20
0
20
40
60
ECMWF (P) + HOAPS (E)ECMWF (P) + SSM/I (E)
ECMWF (P) + COADS (E)
ECMWF (P) + NCEP (E)ECMWF (P) + ECMWF (E)
NCEP (P) + HOAPS (E)
NCEP (P) + SSM/I (E)
NCEP (P) + COADS (E)NCEP (P) + NCEP (E)
NCEP (P) + ECMWF (E)
SSM/I (P) + HOAPS (E)SSM/I (P) + SSM/I (E)
SSM/I (P) + COADS (E)
SSM/I (P) + NCEP (E)SSM/I (P) + ECMWF (E)
GPCP (P) + HOAPS (E)
GPCP (P) + SSM/I (E)GPCP (P) + COADS (E)
GPCP (P) + NCEP (E)
GPCP (P) + ECMWF (E)
Seven Year (1988-94) JFM Mean E-W Transport [10N-10S]
DJF Annual
110E 120E 130E 140E 150E15N
20N
25N
30N
35N
40N
45N
50N
52
27
7
27
JJA
110E 120E 130E 140E 150E15N
20N
25N
30N
35N
40N
45N
50N
24
21
26
22
110E 120E 130E 140E 150E15N
20N
25N
30N
35N
40N
45N
50N
19
1
22
14
2.3 mm/dayDivergence
4.2 mm/dayConvergence
1.2 mm/dayConvergence
13 Year Mean Moisture Transport (kg/sec/m)
Time-Series of Hydrological Variables ( Jan 1988 – Dec 2000)