Transcript 3(06)_nash

Initial Results from the
WMO Radiosonde Intercomparison,
Yangjiang, China, July 2010
John Nash1, Tim Oakley1, Mark Smees1, S.Kurnosenko2and Li Wei3
1Met
Office, Fitzroy Road, Exeter, EX1 3PB, UK
[email protected]
3Meteorological
Observation Centre, China Meteorological Administration
No. 46 Zhongguacun, Nandajie, BEIJING 100081, China
© Crown copyright Met Office
Li Wei, Chinese Project Leader
Project Leader Tim Oakley
Remote sensing, Mark Smees,
Data handling, Gonzague Romanens
WMO team,
Project Leader Tim Oakley
Remote sensing, Mark Smees
WMO team,
Data manager, Sergey Kurnosenko
Holger Vomel,
Scientific Sounding Systems Leader
Test took place from 13 July to 1 August at the
Atmospheric Observatory, Yangjiang,
Guangdong, China
62 Quality Radiosonde Test flights
10 Scientific Sounding test flights
balloons and flight rig prepared by 15 Chinese radiosonde
test experts selected from radiosonde stations across China
Burst Height (m) & Pressure
Burst Height
Burst Pressure
45000
200.0
40000
180.0
160.0
35000
H
30000
e
i
g 25000
h
t
20000
140.0
(
80.0
120.0
100.0
m
)
15000
60.0
10000
40.0
5000
20.0
0
0.0
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71
P
r
e
s
s
u
r
e
Company
Ground System
Radiosonde
Temperature
sensor
Humidity
sensor
Intermet
iMet-3200
iMet2
Bead thermistor
Thin film
Capacitor(E+E)
Modem
SR2K2
M2K2DC
Bead thermistor
Capacitive
polymer
Graw
GS-E
DFM-09
Thermistor
Thin film
Capacitor(E+E)
Meteolabor
ARGUS 37
SRS-C34
Thermocouple
Hygroclip Rotronic
*Snow White
hygrometer
Nanjing
L-Band
GFE1 type
GTS1-2
digital
Cylindrical
thermistor
HS02
Humicap
Jin Yang
GL-5000PB
RSG-20A
NTC Thermistor
Thin film
Capacitor(E+E)
Mesei Co. LTD
RD-06G
RS-06G
Thermistor
Capacitance
polymer
Vaisala Oyj
DigiCora, MW31
RS92-SGP
Capacitive wire
Thin film
capacitor, heated
twin sensor
Beijing
GPS
Radiosounding
System
CF-06-A
Bead
resistance
Thin film
Capacitor
China HuaYun
HY-GTS(U)
GTS(U)1-1
Bead thermistor
Thin film
Capacitor(E+E)
Lockheed
Martin
Sippican INC
LMG6
GPSLMS6
Radiosonde
GPS
Multithermistor
LMS6 Radiosonde
Chip thermistor
Thin film
Capacitor(E+E)
Radiosonde GmbH
Da Qiao
Machine Co Ltd
Chang Feng
Surface Acoustic
wave Co.
Changfeng
Huayun
LMS
Daqiao
Vaisala
Graw
Intermet
Jinyang
Meteolabor
Meisei
Highest measurement
Balloon rate of ascent, m.s-1
Merged preliminary results
for quality radiosondes
• Not to be reproduced
Preliminary simultaneous nighttime temperature differences [K],
Yanjiang,2010
1.40
1.20
1.00
TEMPERTAURE DIFFERENCE [K]
0.80
MEISEI
0.60
VAISALA
DAQIAO
0.40
CHANGF
0.20
HUAYUN
0.00
LM
INTERMSA
-0.20
MODEM
-0.40
GRAW
-0.60
ML
JINYANG
-0.80
-1.00
-1.20
-1.40
0
2
4
6
8
10
12
14
16
18
HEIGHT[KM]
20
22
24
26
28
30
32
34
Estimates of random error in nighttime temperature measurements [K]
Yangjiang, 2010
1.20
Estimate of random error in Temperature
[K]
1.00
MEISEI
VAISALA
0.80
DAQIAO
CHANGF
HUAYUN
0.60
LM
INTERMSA
MODEM
GRAW
0.40
ML
JINYANG
0.20
0.00
0
2
4
6
8
10
12
14
16
18
Height [km]
20
22
24
26
28
30
32
34
Preliminary simultaneous daytime temperature differences [K],
Yangjiang 2010
1.40
1.20
1.00
LM
Temperature difference (K)
0.80
VAISALA
0.60
DAQIAO
0.40
CHANGF
HUAYUN
0.20
INTERMSA
0.00
MODEM
GRAW
-0.20
MEISEI
-0.40
ML
JINYANG
-0.60
MEIS_REF
-0.80
3THERM
-1.00
VAIS_REF
-1.20
-1.40
0
2
4
6
8
10
12
14
16
18
Height (km)
20
22
24
26
28
30
32
34
Estimates of random error in nighttime temperature measurements [K],
Yangjiang, 2010
1.20
LM
Estimate of ranom error in temperature
[K]
1.00
VAISALA
DAQIAO
CHANGF
0.80
HUAYUN
INTERMSA
MODEM
0.60
GRAW
MEISEI
ML
0.40
JINYANG
MEIS_REF
3THERM
0.20
VAIS_REF
0.00
0
2
4
6
8
10
12
14
16
18
Height [km]
20
22
24
26
28
30
32
34
Preliminary simultaneous geopotential height differences [gpm],
Yangjiang , 2010
60.00
40.00
Geopotential height difference
[gpm]
20.00
LM
VAISALA
0.00
DAQIAO
CHANGF
-20.00
HUAYUN
INTERMSA
-40.00
MODEM
GRAW
-60.00
MEISEI
ML
-80.00
JINYANG
3therm
-100.00
-120.00
-140.00
0
2
4
6
8
10
12
14
16
18
Height [km]
20
22
24
26
28
30
32
34
Estimates of random error in geopotential height measurements [gpm],
Yangjian, China, 2010
220.0
Estimate of random error in geopotential height
[ gpm]
200.0
180.0
LM
160.0
VAISALA
DAQIAO
140.0
CHANGF
HUAYUN
120.0
INTERMSA
100.0
MODEM
GRAW
80.0
MEISEI
ML
60.0
JINYANG
40.0
20.0
0.0
0
5
10
15
20
Height [km]
25
30
35
40
Relative humidity night time differences as a function of relative humidity
at pressure greater than 500 hPa (Temperatures greater than 0 deg C), Yangjiang
14
12
10
LM
Relative humidity difference
[ per cent]
8
VAISALA
DAQIAO
6
CHANGF
4
HUAYUN
INTERMSA
2
MODEM
GRAW
0
MEISEI
-2
ML
JINYANG
-4
ML_SW
-6
-8
-10
0
10
20
30
40
50
60
Relative humidity [per cent]
70
80
90
100
Relative humidity differences as a function of relative humidity at pressures greater than 500 hPa,
[Temperatures higher than 0 deg C], daytime, Yangiang
14.0
12.0
10.0
LM
VAISALA
relative humidity difference
[per cent]
8.0
DAQIAO
6.0
CHANGF
HUAYUN
4.0
INTERMSA
MODEM
2.0
GRAW
meisei-LM
0.0
ML-LM
-2.0
JINYANG
ML_SW
-4.0
-6.0
-8.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
Relative humidity [per cent]
70.0
80.0
90.0
100.0
Estimates of random error in nighttime relative humidity measurements
at pressures higher than 500 hPa [temperatures higher than 0 deg C], Yanjiang, 2010
8
Estimated random relative humidiity errror
[per cent]
7
LM
6
VAISALA
DAQIAO
CHANGF
5
HUAYUN
INTERMSA
4
MODEM
GRAW
3
MEISEI
ML
JINYANG
2
ML_SW
1
0
0
10
20
30
40
50
60
Relative Humidity [per cent]
70
80
90
100
Estimates of random error in daytime realtive humidity measurements at pressures higher than 500 hPa
[temperatures higher than 0 deg C], Yangjiang, 2010
Estimated random error in relative humidity [per cent]
8
7
LM
6
VAISALA
DAQIAO
CHANGF
5
HUAYUN
INTERMSA
4
MODEM
GRAW
3
MEISEI
ML
JINYANG
2
ML_SW
1
0
0
10
20
30
40
50
60
Relative humidity [per cent]
70
80
90
100
Relative humidity differences as a function of relative humidity pressures between 200 and 500 hPa
[Temperatures between 0 and -40 deg C approx], nighttime, Yangjiang
22
20
18
16
Relative Humidity difference [per cent]
14
LM
12
VAISALA
DAQIAO
10
CHANGF
8
HUAYUN
INTERMSA
6
MODEM
GRAW
4
MEISEI
2
ML
JINYANG
0
ML_SW
-2
-4
-6
-8
-10
0
10
20
30
40
50
60
Relative humidity [per cent]
70
80
90
100
Relative humidity differences as a function of relative humidity .pressures between 200 and 500 hPa
[Temperatures between 0 and -40 degC approx] daytime, Yangjiang
22
20
18
16
14
LM
Relative humdity difference
[ per cent]
12
VAISALA
DAQIAO
10
CHANGF
8
HUAYUN
INTERMSA
6
MODEM
GRAW
4
MEISEI
2
ML
JINYANG
0
ML_SW
-2
-4
-6
-8
-10
0
10
20
30
40
50
60
Relative humidity [per cent]
70
80
90
100
Estimated random error in relative humidity measurements, night time,
pressure between 200 and 500 hPa, Yangjiang, 2010
20
18
Random error in relative humidity
[per cent]
16
LM
14
VAISALA
DAQIAO
12
CHANGF
HUAYUN
INTERMSA
10
MODEM
GRAW
MEISEI
8
ML
JINYANG
6
ML_SW
4
2
0
0
10
20
30
40
50
60
Relative humidity [per cent]
70
80
90
100
Estimated random error in relative humdity measurements, day time,
pressure between 200 and 500 hPa, Yangjiang, 2010
20.0
18.0
Estimated random error in relative humidity
[per cent]
16.0
LM
14.0
VAISALA
DAQIAO
12.0
CHANGF
HUAYUN
INTERMSA
10.0
MODEM
GRAW
MEISEI
8.0
ML
JINYANG
6.0
ML_SW
4.0
2.0
0.0
0
10
20
30
40
50
60
Relative Humidity [per cent]
70
80
90
100
Radiosondes allowed on Scientific sounding instrument
(SSI) flights were:
Cryogenic Frost point hygrometer (CFH)
Meisei fast response temperature sensor
LMS Multithermistor LMS6 Radiosonde
Vaisala reference radiosonde ( DryCap frost point
measurement)
Graw DFM-09 radiosonde [limited number of flights]
Science flight
night
Science flight
night
Science flight
day
Science flight
day