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This page is used only to draft changes for review prior to publishing in the Forecast User space and is accessible by ECMWF staff only.
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Description of upgrade
IFS Cycle 43r3 is an upgrade with many scientific contributions, including changes in data assimilation (both in the EDA and the 4DVAR), in the use of observations, and in modelling. The new cycle only includes meteorological changes; there are no technical changes, e.g. new resolutions.
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The planned timetable for the implementation of the cycle 43r3 is as follows:
| Date | Event |
|---|---|
| 03.04.2017 | Initial publication on the web. |
| 24.05.2017 | Initial announcement, with test data in MARS |
| 09.06.2017 | Availability of test data in dissemination |
| 11.07.2017 | Expected date of implementation |
The timetable represents current expectations and may change in light of actual progress made.
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The GRIB model identifiers (generating process identification number) for cycle 43R3 will be changed as follows:
| GRIB 1 Section 1 Octets | GRIB 2 Section 4 Octets | grib_api key | Component | Model ID | |
|---|---|---|---|---|---|
| Old | New | ||||
| 6 | 14 | generatingProcessIdentifier | Atmospheric model | 147 | 148 |
| Ocean wave model | 112 | 113 | |||
| HRES stand-alone ocean wave model | 212 | 213 | |||
| Note |
|---|
| The generatingProcessIdentifier for the Atmospheric Model for the initial dates (until 05 June 2017) is 147. |
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Member State users of the "Simple time-critical jobs" framework can test that their scripts will work with the IFS Cycle 43r3 test data by using the special 'events' set up for this purpose:
| Event ID | Event name | Description |
|---|---|---|
| 1633 | e_ms090 | At this stage, the e-suite step 090 (HRES-BC) has been generated. |
| 1634 | e_ms144 | At this stage, the e-suite step 144 (ENS-BC) has been generated. |
| 1635 | e_ms240 | At this stage, the e-suite step 240 (HRES) has been generated. |
| 1636 | e_ms360 | At this stage, the e-suite step 360 (ENS) has been generated. |
| 1637 | e_mslaw | At this stage, the e-suite step law (HRES-SAW) has been generated. |
| 1638 | e_ms1104 | At this stage, the e-suite step 1104 (ENS-MOFC) has been generated. |
| 1639 | msrefc | At this stage, the e-suite step refc (REFORECAST) has been updated. |
For these events, MSJ_EXPVER environment variable is set to 0071 and can be used to specify the IFS Cycle 43r3 test data any MARS retrievals.
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| Anchor | ||||
|---|---|---|---|---|
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| Date | Reason for update |
|---|---|
| 31.03.2017 |
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| 24.05.2017 |
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| 09.06.2017 |
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| 22.06.2017 |
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