Calibration
From Agri4castWiki
General description
The calibration of CGMS-WOFOST and CGMS-LINGRA for new crops and recalibration for the crops already simulated in CGMS are performed with different data sets.
The four data sets currently available are:
- CGMS data sets: the internal tables of crop calendars and crop parameters already present in the system which are updated during calibration.
- Crop-KUL DB which is a DB of crop parameters (Kc coefficients included) made in 1997 with the KUL University.
- MOCA (Monograph on Candidate Countries) DB which collects the most recent crop data on new Member States. This DB was released in 2003.
- PASK (Pasture Knowledge base) DB which collects the most recent pasture data on new Member States. This DB was released in 2003.
The data are available at climate grid resolution.
| Crop | DB sources EU15 | DB Sources EU25 | Type | MODEL |
|---|---|---|---|---|
| Winter (Soft) Wheat | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Spring Barley | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Winter Rape seed | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Grain maize | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Sugar beet | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Potato | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Sunflower | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Recalibration | WOFOST |
| Durum wheat | See winter wheat | See winter wheat | Calibration | WOFOST |
| Winter Barley | CGMS/KUL-Univ. DB | CGMS/KUL Univ. and MOCA DB | Calibration | WOFOST |
| Rye | No data available | MOCA DB | Calibration | WOFOST |
| Oat | No data available | MOCA DB | Calibration | WOFOST |
| Spring Rape seed | CGMS/KUL-Univ. DB | CGMS/KUL Univ. & MOCA DB | Calibration | WOFOST |
| Field beans | CGMS/KUL-Univ. DB | MOCA DB | Calibration | WOFOST |
| Field Peas | No data available | MOCA DB | Calibration | WOFOST |
| Soy Bean | CGMS/KUL-Univ. DB | MOCA DB | Calibration | WOFOST |
| Rice | CGMS/KUL-Univ. DB | No data available | Calibration | WOFOST |
| Rye Grass | LINGRA & PASK DB | PASK DB | Recalibration | LINGRA |
| Alfalfa | PASK DB | PASK DB | Calibration | LINGRA |
| Tomato | No data available | No data available | Calibration | CGMS SYTEM |
The calibration consist in the following subtasks:
- Consistency check of the datasets (area of interest, make decisions how to calibrate the models and which part of the DBs to exploit).
- Coherent recalibration from EU15 to EU25 with the results of the consistency check of the existing crops.
- Calibration of new crops at EU25 level. This includes verifications of the consistency of the CGMS output by runnin simulations up to level 3 in order to verify the output obtained using the new crop parameters.
- Validation with sub data sets.
The calibration and the validation can be done according to one of the following strategy/approaches based on the data availability:
- Strong: Based on complete sets of crop parameters from experimental fields.
- Medium: Based exploiting as much as possible the crop parameters data available in the DBs.
- Light: Based on TSUM derived from CGMS level 1 and basic crop calendars. As the information of crop start-emergence/flowering/end-of-maturity at grid level are the basic information available in the system, the main tables which are analyzed are the GRID_WEATHER and the LONG_TERM_AVERAGE_GRID_WEATHER to relate meteo data with calendar day to calculate crop TSUM.
