Climate zone Soil Series
Crop areas
Admin. boundary
SDBMS
DSSAT 4.6 FILE-X &
OTHER INPUTS
OUTPUT FILES
ANALYSIS PROGRAMS
Roi Et Series TH01370001
CMMC KKKU ECHAM4
Yield
& Production 3-6 Months
in advance Production
Scenarios
MBMS
GCM & RCMs: SWF
MWCropDSS for SCY4cast system
Jintrawet (2009)
SEACLID/CORDEX
Weather Data
• Minimum Dataset
• Weather File Structure
• Weatherman
• Exercise
Minimum data set
• Minimum set of data that can be easily collected by experimentalists
• Minimum set of data that can be used as input
to models and provide reliable simulaAons of
the processes involved
Minimum weather data
• Daily ObservaAons
– Maximum temperature – Minimum temperature – Solar radiaAon
– PrecipitaAon/rainfall
Minimum weather data
• Site ObservaAons
– LaAtude – Longitude – ElevaAon
– Long-‐term average temperature
– Amplitude of warmest and coolest monthly long-‐term average temperature
– Temperature sensor height
– Wind sensor height
*WEATHER DATA :KKFCRC Weather Station
@ INSI LAT LONG ELEV TAV AMP REFHT WNDHT DTKK 16.780 102.950 210.0 25.0 3.0 2.0 2.0
@DATE SRAD TMAX TMIN RAIN
13001 17.7 28.2 12.8 0.0
13002 18.2 32.5 15.3 0.0
13003 18.6 32.8 16.7 0.0
13004 17.2 31.8 15.9 0.0
13005 18.8 32.1 15.3 0.0
13006 17.1 30.6 15.5 0.0
13007 18.9 31.7 15.6 0.0
13008 18.8 32.8 16.2 0.0
13009 17.9 33.1 18.6 0.0
13010 17.6 29.7 16.4 0.0
File naming convenAon
• AABBNNnn.WTH
– AA = InsAtute IdenAfier (ID) – BB = Site ID
– NN = Year of observaAon
– nn = Number of years (default = 01)
File naming convenAon
• DTKK1301.WTH
– DT = Department of Agriculture, Thailand – KK = Khon Kaen Field Crop Research Center – 13 = 2013
– 01 = 1 year of data
File naming convenAon
• DTKK1101.WTH
• DTKK1201.WTH
• ……….
WeatherMan
• Weather management uAlity program
• Import data
• Export data in DSSAT format
• Fill missing data
• Summarize weather data
Data quality
• Missing data
• Erroneous data
– rain < 0.0
– radiaAon =< 0.0 – Tmax < Tmin
– Tmax > Extreme_max
– Tmin < Extreme_min
Weather Generators
• Climate file
• One file per site
– AABB.CLI
• AA = InsAtute ID
• BB = Site ID
– DTKK.CLI
*CLIMATE : Griffin,Georgia,USA
@ INSI LAT LONG ELEV TAV AMP SRAY TMXY TMNY RAIY GAGR 33.262 -84.284 299 16.1 9.4 15.6 22.5 9.7 1193
@START DURN ANGA ANGB REFHT WNDHT SOURCE
1987 11 0.25 0.50 2.0 3.5 Calculated_from_daily_data
@ GSST GSDU 1 365
*MONTHLY AVERAGES
@MONTH SAMN XAMN NAMN RTOT RNUM SHMN AMTH BMTH
1 8.9 13.0 0.7 128.2 13.4 -99.0 0.250 0.500
2 11.7 15.1 2.3 111.3 10.0 -99.0 0.250 0.500
3 15.7 18.9 5.5 119.8 10.3 -99.0 0.250 0.500
4 20.1 22.7 8.0 91.4 8.7 -99.0 0.250 0.500
5 20.9 26.8 13.2 70.0 9.7 -99.0 0.250 0.500
6 20.6 30.0 17.5 88.1 10.9 -99.0 0.250 0.500
7 21.0 31.6 19.6 118.4 13.3 -99.0 0.250 0.500
8 19.1 30.8 19.1 87.3 9.8 -99.0 0.250 0.500
9 16.6 27.9 15.9 120.9 10.0 -99.0 0.250 0.500
10 13.6 22.4 9.0 68.4 7.8 -99.0 0.250 0.500
11 10.7 17.3 4.3 96.4 8.9 -99.0 0.250 0.500
12 8.2 14.0 1.5 93.3 11.0 -99.0 0.250 0.500
*CLIMATE : Griffin,Georgia,USA
@ INSI LAT LONG ELEV TAV AMP SRAY TMXY TMNY RAIY GAGR 33.262 -84.284 299 16.1 9.4 15.6 22.5 9.7 1193
@START DURN ANGA ANGB REFHT WNDHT SOURCE
1987 11 0.25 0.50 2.0 3.5 Calculated_from_daily_data
@ GSST GSDU 1 365
*MONTHLY AVERAGES
@MONTH SAMN XAMN NAMN RTOT RNUM SHMN AMTH BMTH
1 8.9 13.0 0.7 128.2 13.4 -99.0 0.250 0.500
2 11.7 15.1 2.3 111.3 10.0 -99.0 0.250 0.500
3 15.7 18.9 5.5 119.8 10.3 -99.0 0.250 0.500
4 20.1 22.7 8.0 91.4 8.7 -99.0 0.250 0.500
5 20.9 26.8 13.2 70.0 9.7 -99.0 0.250 0.500
6 20.6 30.0 17.5 88.1 10.9 -99.0 0.250 0.500
7 21.0 31.6 19.6 118.4 13.3 -99.0 0.250 0.500
8 19.1 30.8 19.1 87.3 9.8 -99.0 0.250 0.500
9 16.6 27.9 15.9 120.9 10.0 -99.0 0.250 0.500
10 13.6 22.4 9.0 68.4 7.8 -99.0 0.250 0.500
11 10.7 17.3 4.3 96.4 8.9 -99.0 0.250 0.500
12 8.2 14.0 1.5 93.3 11.0 -99.0 0.250 0.500
Weatherman
• Import from text, CVS, XLS, or DBF files
• Data is stored in Paradox databases and exported into DSSAT weather files
• InteracAve data management and climate
analysis
Station Information can be edited
Monthly averages
are calculated and
can be edited
Data can be entered
interactively of imported from text, CVS, XLS, or DBF files
Columns can
be defined
interactively
Data can be edited
interactively ..
.. and
graphically
analyzed.
Data can then be exported for use in
DSSAT …
Summary
• Good news
– DSSATv4 weather files are idenAcal to V3.5
– New weather generators (long-‐term targets, ENSO, and GCM) are being developed
• Less good news
– Some features are not fully debugged and known problems exist
– No Y2K format (YYYYDDD) support
• Befer news
– An update will likely be ready by workshop end.
Acronyms – Weather.cde
@CDE DESCRIPTION ALPHA Rainfall distribution scale parameter, monthly, mm-2 AMTH Angstrom 'a' coefficient, monthly, unitless ANGA Angstrom 'a' coefficient, yearly, unitless ANGB Angstrom 'b' coefficient, yearly, unitless BMTH Angstrom 'b' coefficient, monthly, unitless DATE Date, year + days from Jan. 1 DEWP Daily dewpoint temperature, C DURN Duration of summarization period for climate files, Yr ELEV Elevation, m EVAP Daily pan evaporation (mm d-1) GSDU Growing season duration, Day GSST Growing season start day, Doy INSI Institute and site code LAT Latitude, degrees (decimals) LONG Longitude, degrees (decimals) MTH Month, # NAMN Temperature minimum,all days,monthly average, C NASD Temperature minimum,all days,monthly standard deviation, C PAR Daily photosynthetic radiation, moles m-2 day-1 PDW Probability of a dry-wet sequence RAIN Daily rainfall (incl.snow), mm day-1 RAIY Rainfall, yearly total, mm REFHT Reference height for weather measurements, m RNUM Rainy days, # month-1 RTOT Rainfall total, mm month-1
SAMN Solar radiation,all days,monthly average, MJ m-2 d-1 SDMN Solar radiation,dry days,monthly average, MJ m-2 d-1 SDSD Solar radiation,dry days,monthly standard deviation, MJ m-2 d-1 SHMN Daily sunshine duration, monthly average, percent SOURCE Source of daily weather data, text SRAD Daily solar radiation, MJ m-2 day-1 SRAY Solar radiation,yearly average, MJ m-2 day-1 START Start of summary period for climate (CLI) files, Year SUNH Daily sunshine duration, percent SWMN Solar radiation,wet days,monthly average, MJ m-2 d-1 SWSD Solar radiation,wet days,monthly standard deviation, MJ m-2 d-1 TAMP Temperature amplitude, monthly averages, C TAV Temperature average for whole year, C TDRY Daily dry-bulb temperature, C TMAX Daily temperature maximum, C TMIN Daily temperature minimum, C TMNY Temperature minimum, yearly average, C TMXY Temperature maximum, yearly average, C TWET Daily wet-bulb temperature, C WIND Daily wind speed (km d-1) WNDHT Reference height for windspeed measurements, m XAMN Temperature maximum,all days,monthly average, C XDMN Temperature maximum,dry days,monthly average, C XDSD Temperature maximum,dry days,standard deviation, C XWMN Temperature maximum,wet days,monthly average, C XWSD Temperature maximum,wet days,standard deviation
