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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. The publicly accessible page can be viewed in the Forecast User space. |
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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.
The page will be updated as required. It was last changed on 1222.06.2017.
For a record of changes made to this page please refer to Document versions.
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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 | |||
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| The generatingProcessIdentifier for the Atmospheric Model for the initial dates (until 05 June 2017) is 147. |
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- Internet transfers: 193.61.196.104 ( ecpds-xma.ecmwf.int ) 193.61.196.105 ( ecpds-xmb.ecmwf.int )
- RMDCN transfers: 136.156.8.132 ( mspds-dm4.ecmwf.int )
The IFS Cycle 43r3 test products are available as version number 71 (file names ending with '71'). The test products are generated daily, shortly behind real-time from both the 00UTC and 12UTC runs and based on the operational dissemination requirements and the IFS Cycle 43r3 test data for HRES, ENS, HRES-WAM, ENS-WAM and HRES-SAW.
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| The cycle 43r3 ENS extended range forecast and re-forecast data and the HRES and ENS Tropical Cyclone trajectories will become available in dissemination before 13 June 2017. |
Should you require any assistance with IFS Cycle 43r3 test dissemination products, Member and Cooperating states should contact Unknown User (maj) and Commercial customers should contact Data Services.
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Web charts based on IFS cycle 43r3 test data will be available later this weekas soon as possible. They can be viewed by first selecting the chart in the Charts Catalogue, and then choosing the Suite tab above the chart, then selecting "Esuite:0071". The chart types which have 43r3 data available are those for which the icon representing the chart includes a grey arrow, as illustrated hereafter:
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ENS Meteograms based on IFS cycle 43r3 test data will become are available later this week. They can be plotted via the (clickable) Web charts as described just above, or by choosing 'New cycle (IFS43r3)' under the Experiment tab named 'Model run' on the interactive ENS meteogram page
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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 |
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| 31.03.2017 |
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| 24.05.2017 |
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| 09.06.2017 |
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| 22.06. |
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| 2017 |
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