Transcript Review of NAEFS Variables

Review of NAEFS Variables
NAEFS workshop Oct 6-8 2008, NCEP
Lewis Poulin, MSC-CMC
Implementation. and Operational services
[email protected]
With information and assistance provided by:
Normand Gagnon, MSC-CMC
Dick Wobus, Yuejian Zhu, NCEP
Latest set of NAEFS expanded dataset (October 2008)
Variables
NCEP: Pgrba file / CMC: naefs file
Total 78(26)
GHT
Surface, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
TMP
2m, 2mMax, 2mMin, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
13 (3)
RH
2m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
UGRD
10m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
VGRD
10m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
PRES
Surface, PRMSL
2 (0)
PRCP-NCEP
Categorical: APCP, CRAIN, CSNOW, CFRZR, CICEP
5 (0)
PRCP-CMC
Cummulative from 00hr: Rain, Snow, Freezing rain, Ice pellets
FLUX (surface)
LHTFL, SHTFL, DSWRF, DLWRF, USWRF, ULWRF
(CMC-cmltv, NCEP 6hr avg)
6 (6)
FLUX (top)
ULWRF (OLR) (CMC-cmltv, NCEP 6hr avg)
1 (1)
PWAT
Total precipitable water at atmospheric column
1 (0)
TCDC
Total cloud cover at atmospheric column (CMC instantaneous, NCEP 6hr avg)
1 (0)
CAPE
Convective available potential energy
1 (0)
SOIL
SOILW(0-10cm), WEASD(water equiv. of accum. Snow depth), SNOD(surface), TMP(0-10cm down)
4 (4)
NCEP Notes
Surface GHT is only in analysis file and first pgrb file when the resolution changed.
23 of 26 new variables are from pgrbb files, 10, 50hPa RH and SNOD are new variables
DRAFT – Page 2 – May 24, 2016
NAEFS expanded variables dataset
Variables
NCEP: Pgrba file / CMC: naefs file
Total 78(26)
GHT
Surface, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
TMP
2m, 2mMax, 2mMin, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
13 (3)
RH
2m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
UGRD
10m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
VGRD
10m, 10, 50, 100, 200, 250, 500, 700, 850, 925, 1000hPa
11 (3)
PRES
Surface, PRMSL
2 (0)
PRCP-NCEP
Categorical: APCP, CRAIN, CSNOW, CFRZR, CICEP
5 (0)
PRCP-CMC
Cummulative from 00hr: Rain, Snow, Freezing rain, Ice pellets
FLUX (surface)
LHTFL, SHTFL, DSWRF, DLWRF, USWRF, ULWRF
(CMC-cmltv, NCEP 6hr avg)
6 (6)
FLUX (top)
ULWRF (OLR) (CMC-cmltv, NCEP 6hr avg)
1 (1)
PWAT
Total precipitable water at atmospheric column
1 (0)
TCDC
Total cloud cover at atmospheric column (CMC instantaneous, NCEP 6hr avg)
1 (0)
CAPE
Convective available potential energy
1 (0)
SOIL
SOILW(0-10cm), WEASD(water equiv. of accum. Snow depth), SNOD(surface), TMP(0-10cm down)
4 (4)
NCEP Notes
Surface GHT is only in analysis file and first pgrb file when the resolution changed.
23 of 26 new variables are from pgrbb files, 10, 50hPa RH and SNOD are new variables
DRAFT – Page 3 – May 24, 2016
Managing NAEFS variables - some considerations
• How will increase in no. of variables impact file sizes, operational timings?
• If timings are impacted
– High and low priority variables?
– High and low priority exchange files?
– Delay products because we are waiting for low priority variables?
• Manage differences for same variables between centers:
– Variables covering different intervals between centers
▪ Ex: APCP, Flux (CMC cumulative, NCEP /6 hour)
– TCLD (CMC: Instant cloud cover, NCEP: 6 hour average)
– Do we want variables to converge to same definitions (eventually) for all centers
• Consistency of coding in GRIB2 between centers
– Testing of GRIB2 encoding/decoding can be time consuming
– NCEP standard, vs WMO grib2 standard
– Document clearly for users
DRAFT – Page 4 – May 24, 2016
Managing NAEFS variables - some considerations
Adding variables to dataset not always easy
– Manage expectations, requirements via a list, well documented
– What are short, mid and long term goal for variables?
– May take long periods of time to add variables that require in
house development work to make those available
– ?? What if ?? implement new variables same time each year?
▪ Adding variables at set times may make it easier to plan for
▪ Of course can add variables any time if ready, otherwise set times
– Each center has variables expert and contact person
▪ CMC – Normand Gagnon, NCEP: Dick Wobus
▪ Other centers should ID their ‘variables’ expert
▪ See additional info of previous work on next slides
DRAFT – Page 5 – May 24, 2016
Previous work on variables
New NAEFS Variables
Variables in or available to be added to GEFS for NAEFS exchange
GEFS status on Jan. 16, 2008 (D. Wobus)
CMC status on Mar. 20 2008 (N. Gagnon)
Proposed NAEFS variables 1 of 4
Request
In pgrbd files
(Experimental)
CMC
Via Direct
model
outputs
CMC
Via Postprocessing
HLCY 0-1Km
HLCY 0-3Km
No
No
Wind Shear 0-6km
No
No
10M Wind Max
(max over 6 or 12hr
interval?)
No
No
No
No
Helicity 0-1km, 0-3km
Surface Wind Gust
In pgrbb files
(Production)
GUST at
forecast hour
DRAFT – Page 7 – May 24, 2016
Proposed NAEFS variables 2 of 4
Requested
In pgrbb files
(production)
In pgrbd files
(experimental
)
CMC
Via Direct
model
outputs
CMC
Via Postprocessing
U, V, T, RH at 100, 50, 10 hPa
U, V, T at
100, 50, 10;
RH at 100
hPa
RH 50, 10
hPa
Yes, but 10
hPa is our
model lid.
-
Dew Point at 2m
DPT at 2m
Yes
-
CIN
CIN sfc, 0180 from sfc
No
No
CIN 0-90mb
and 0-255mb
DRAFT – Page 8 – May 24, 2016
Proposed NAEFS variables 3 of 4
Requested
In pgrbb files
(production)
In pgrbd files
CMC
(experimental) Via Direct model
outputs
surface latent,
sensible, SW, LW
fluxes
LHTFL, SHTFL,
DSWRF, USWRF,
DLWRF, ULWRF
at sfc
(interval average)
LHTFL, SHTFL
(instantaneous “FV”,”FC”
and 6 hour
average,”AZ”,”AY”)
DSWRF, DLWRF
(instantaneous, “FB”,”FI”,
total accumulation,
“N4”,”AD”)
DSWRF, USWRF
DLWRF, ULWRF
(6 hour interval)
OLR
ULWRF at top
(interval average)
ULWRF (instantaneous,
“EI”, accumulation, “AR”)
ULWRF
(6 hour interval)
DRAFT – Page 9 – May 24, 2016
CMC
Via Postprocessing
Proposed NAEFS variables 4 of 4
Requested
In pgrbb files (production)
In pgrbd
files
(experiment
al)
CMC
Via Direct model
outputs
CMC
Via
Postprocessi
ng
Snow
WEASD (liq. equiv.)
SNOD (depth)
Yes, but for half of members
it is a constant during the
integration. “I5”,”SD”
-
Soil variables
TMP
SOILW (frac. water)
(0-10cm, 10-40cm, 40-100cm, 100200cm)
Yes, for half of the members
the soil moisture is constant.
For the other half we have
the 0-10cm layer but not the
other ones.”I0”, ”I1(1)”in
m3/m3
-
DRAFT – Page 10 – May 24, 2016
Proposition of CMC
•
•
•
•
•
•
•
U,V,T,RH at 100 ,50 and 10 hPa; i.e. wind, temperature, relative humidity
DPT at 2m; i.e. dew-point
LHTFL, SHTFL (total accumulation); i.e. surface latent and sensible heat flux
DSWRF, DLWRF (total accumulation); i.e. down surface short and long wave radiation
OLR (total accumulation); i.e. outgoing long wave radiation
WEASD, SNOD; i.e. snow water equivalent and snow depth
Temperature and soil moisture at level 1 (0-10 cm)
BLUE=available via TIGGE
DRAFT – Page 11 – May 24, 2016