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The planned timetable for the implementation of IFS cycle 43r1 is as follows:

The timetable represents current expectations and may change in light of actual progress made.

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Further technical information is provided in the table.

paramId	shortName	name	description	units	GRIB edition	Component	Test data available	Dissemination	ecCharts	Proposed for Catalogue
260109	ceil	Ceiling	Cloud-base height relative to the ground (at least 50% cloud in one layer)	m	2	HRES / ENS			TBC	TBC
228046	hcct	Height of convective cloud top		m	1	HRES / ENS			TBC	TBC
228047	hwbt0	Height of zero-degree wet-bulb temperature	See 43r1 new parameters: Height of zero-degree (and one-degree) wet-bulb temperature	m	1	HRES / ENS			TBC	TBC
228048	hwbt1	Height of one-degree wet-bulb temperature	See 43r1 new parameters: Height of zero-degree (and one-degree) wet-bulb temperature	m	1	HRES / ENS			TBC	TBC
47	dsrp	Direct solar radiation	Incident on a plane perpendicular to the sun's direction. This is an accumulated field.	J/m2	1	HRES / ENS NB: only forecast			TBC	TBC
140112	wefxm	Wave energy flux magnitude	Integral over all frequencies and directions of the product of the group speed and the two-dimensional energy wave spectrum.	W/m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140113	wefxd	Wave energy flux mean direction	Spectral mean direction over all frequencies and direction of the product of the group velocity vector and the two-dimensional energy wave spectrum.	Degree true	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140114	h1012	Significant wave height of all waves with periods within the inclusive range from 10 to 12 seconds	Significant wave height of all waves with periods within the inclusive range from 10 to 12 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/12 and 1/10 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140115	h1214	Significant wave height of all waves with periods within the inclusive range from12 to 14 seconds	Significant wave height of all waves with periods within the inclusive range from 12 to 14 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/14 and 1/12 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140116	h1417	Significant wave height of all waves with periods within the inclusive range from 14 to 17 seconds	Significant wave height of all waves with periods within the inclusive range from 14 to 17 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/17 and 1/14 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140117	h1721	Significant wave height of all waves with periods within the inclusive range from 17 to 21 seconds	Significant wave height of all waves with periods within the inclusive range from 17 to 21 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/21 and 1/17 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140118	h2125	Significant wave height of all waves with periods within the inclusive range from 21 to 25 seconds	Significant wave height of all waves with periods within the inclusive range from 21 to 25 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/25 and 1/21 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC
140119	h2530	Significant wave height of all waves with periods within the inclusive range from 25 to 30 seconds	Significant wave height of all waves with periods within the inclusive range from 25 to 30 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/30 and 1/25 Hz of the two-dimension wave spectrum	m	1	HRES-WAM / ENS-WAM / HRES-SAW			TBC	TBC

The following new variable resolution parameter is also provided in the ensemble forecast variable resolution overlap stream (STREAM=EFOV) at T+360 (STEP=360) from the Monday and Thursday runs of the ensemble forecast monthly extension.

paramId	shortName	name	description	units	GRIB edition	Component	Test data available	Dissemination	ecCharts	Proposed for Catalogue
230047	dsrpvar	Direct solar radiation (variable resolution)	Variable resolution companion to dsrp.	J/m2	1	ENS (STREAM=EFOV)			TBC	TBC

Meteorological impact of the new cycle

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The medium-range ensemble and its monthly extension see a major upgrade in the dynamical ocean model.  The main changes are summarised in the table.

ORAS5 complements the current ocean reanalysis system (ORAS4) until there is no longer need for the ORAS4 output.

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The GRIB model identifiers (generating process identification number) for the new cycle will be changed as follows:

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users_impact users_impact

Data Access

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With the introduction of hourly post-processing for the first 90 hours of the ENS, the five accumulated surface variables (10m wind gusts, maximum and minimum 2m temperature, maximum and minimum total precipitation rate since the previous post-processing) will change to represent hourly accumulations instead of the currently operational 3-hourly accumulations. For the rest of the forecast range, these products will remain unchanged providing three-hourly data to T+144, and six-hourly data to T+360.

New delivery schedule for the ENS

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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 43r1 test data by using the special 'events' set up for this purpose:

For these events, MSJ_EXPVER environment variable is set to 0070 and can be used to specify the IFS cycle 43r1 test data any MARS retrievals.

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Further Reading

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