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The page will be updated as required. It was last changed on 17 30 May 2019 

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News

to this page please refer to  Document versions.

Further information and advice regarding the upgrade can be obtained from User Support.

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News

30 May 2019 

• Due to a technical error, the events probabilities for tropical storms, depressions and hurricanes (GRIB parameters 131089, 131090 and 131091 - shortNames pts, ph and ptd) have been encoded and archived at a lower resolution, N320 instead of O640, in Cycle 46r1. The data values were correct. We have fixed this issue as of the run of 21 May 2019 at 12UTC.
• The cause of strange 2m temperature behaviour in the model climate close to glaciers and ice sheets, which in turn affects EFI and SOT fields as illustrated below, has been diagnosed and we are now working to rectify this. We may choose to re-run the Cycle 46r1 re-forecast(s) for some dates. We will confirm this  as soon as we have further details.
  
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  Medium-range EFI, 2-metre mean temperature, Cycle 45r1 (OPER) and Cycle 46r1 (E-suite).
  
  

17 May 2019 

• The IFS cycle 46r1 scorecards are now available.
• Cycle 46r1 test data are available in ecCharts and as ENS meteograms.
• Recording and slides of second cycle 46r1 webinar are available.
• The implementation of the new cycle is confirmed for Tuesday 11 Jun 2019. The first operational run using the new cycle will be the 06 UTC analysis and forecast in the Boundary Conditions Optional Programme on 11 Jun 2019  followed by the 12 UTC main assimilation and forecast. The monthly forecast extension to the ensemble will be run with the new IFS cycle for the first time the following Thursday 13 Jun 2019.
• We have identified a problem with the parameter "Maximum CAPES in the last 6 hours" (param=228036, shortName=mxcapes6) in Cycle 46r1, affecting the data archived in MARS and available through the dissemination, for HRES, ENS and ENS extended. We are working on a fix for this parameter.

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The planned timetable for the implementation of the cycle 46r1 is as follows:

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 46r1 will be changed as follows:

Sea Surface Temperature

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Extended output have been added in cycle 46r1, including a subset of ocean fields on the atmospheric grid.

paramId	shortName	name	Description	units	GRIB edition	Components	Test data available	Dissemination	ecCharts	Added to the Catalogue
Near-surface wind output
228239	200u	200 metre U wind component	eastward component of the 200m wind.	m s-1	1	HRES / ENS		TBC		TBC
228240	200v	200 metre V wind component	northward component of the 200m wind.	m s-1	1	HRES / ENS		TBC		TBC
Wave model parameters
140098	weta	Wave induced mean sea level correction	Wave induced mean sea level correction	m	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140099	wraf	Ratio of wave angular and frequency width	Ratio of wave angular and frequency width	dimensionless	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140100	wnslc	Number of events in freak waves statistics	Number of events in freak waves statistics	dimensionless	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140101	utaua	U-component of atmospheric surface momentum flux	U-component of atmospheric surface momentum flux	N m-2	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140102	vtaua	V-component of atmospheric surface momentum flux	V-component of atmospheric surface momentum flux	N m-2	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140103	utauo	U-component of surface momentum flux into ocean	U-component of surface momentum flux into ocean	N m-2	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140104	vtauo	V-component of surface momentum flux into ocean	V-component of surface momentum flux into ocean	N m-2	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
140105	wphio	Wave turbulent energy flux into ocean	Wave turbulent energy flux into ocean	W m-2	1	HRES-WAM / HRES-SAW / ENS-WAM		TBC		TBC
Ocean parameters available at the surface, produced by the NEMO model.
174098	sithick	Sea-ice thickness *	Sea-ice thickness	m	1	HRES / ENS		TBC		TBC
151148	mld	Mixed layer depth *	Mixed layer depth	m	1	HRES / ENS		TBC		TBC
151145	zos	Sea surface height *	Sea surface height	m	1	HRES / ENS		TBC		TBC
151163	t20d	Depth of 20C isotherm *	Depth of 20C isotherm	m	1	HRES / ENS		TBC		TBC
151130	so	Sea water practical salinity *	Sea water practical salinity	psu	1	HRES / ENS		TBC		TBC
151164	tav300	Average potential temperature in the upper 300m *	Average potential temperature in the upper 300m	degrees C	1	HRES / ENS		TBC		TBC
151175	sav300	Average salinity in the upper 300m *	Average salinity in the upper 300m	psu	1	HRES / ENS		TBC		TBC
* All fields are masked on land and lake points. tav300 and sav300 are masked on ocean points with depth < 300m.
Parameters on Potential Vorticity levels (1.5 and 2 PVU)
129	z	Geopotential	This parameter is the gravitational potential energy of a unit mass, at a particular location, relative to mean sea level.	m2 s-2	1	HRES / ENS *		TBC		TBC
203	o3	Ozone mass mixing ratio	This parameter is the mass of ozone per kilogram of air.	kg kg-1	1	HRES / ENS *		TBC		TBC
3	pt	Potential Temperature	Potential Temperature	K	1	HRES / ENS *		TBC		TBC
54	pres	Pressure	Pressure	Pa	1	HRES / ENS *		TBC		TBC
133	q	Specific humidity	This parameter is the mass of water vapour per kilogram of moist air.	kg kg-1	1	HRES / ENS *		TBC		TBC
131	u	U component of wind	This parameter is the eastward component of the wind. It is the horizontal speed of air moving towards the east, in metres per second. A negative sign thus indicates air movement towards the west.	m s-1	1	HRES / ENS *		TBC		TBC
132	v	V component of wind	This parameter is the northward component of the wind. It is the horizontal speed of air moving towards the north, in metres per second. A negative sign thus indicates air movement towards the south.	m s-1	1	HRES / ENS *		TBC		TBC
* The perturbed forecasts for the ENS only contain the parameters pt, u and v.
Ensemble probabilities
131098	tpg25	Total precipitation of at least 25 mm	Total precipitation of at least 25 mm	%	2	ENS		TBC		TBC
131099	tpg50	Total precipitation of at least 50 mm	Total precipitation of at least 50 mm	%	2	ENS		TBC		TBC
131085	tpg100	Total precipitation of at least 100 mm	Total precipitation of at least 100 mm	%	2	ENS		TBC		TBC
131100	10fgg10	10 metre wind gust of at least 10 m/s	10 metre wind gust of at least 10 m/s	%	2	ENS		TBC		TBC
133093	ptsa_gt_1stdev	Probability of 850hPa temperature standardized anomaly greater than 1 standard deviation	Probability of temperature anomaly greater than 1 standard deviation of the climatology.	%	2	ENS		TBC		TBC
133094	ptsa_gt_1p5stdev	Probability of 850hPa temperature standardized anomaly greater than 1.5 standard deviation	Probability of temperature anomaly greater than 1.5 standard deviation of the climatology. See also here.	%	2	ENS		TBC		TBC
133095	ptsa_gt_2stdev	Probability of 850hPa temperature standardized anomaly greater than 2 standard deviation	Probability of temperature anomaly greater than 2 standard deviation of the

climatology

climatology. See also here.	%	2	ENS		TBC		TBC
133096	ptsa_lt_1stdev	Probability of 850hPa temperature standardized anomaly less than -1 standard deviation	Probability of temperature anomaly less than -1 standard deviation of the climatology. See also here.	%	2	ENS		TBC		TBC
133097	ptsa_lt_1p5stdev	Probability of 850hPa temperature standardized anomaly less than -1.5 standard deviation	Probability of temperature anomaly less than -1.5 standard deviation of the climatology. See also here.	%	2	ENS		TBC		TBC
133098	ptsa_lt_2stdev	Probability of 850hPa temperature standardized anomaly less than -2 standard deviation	Probability of temperature anomaly less than -2 standard deviation of the climatology. See also here.	%	2	ENS		TBC		TBC
Ensemble mean / Ensemble standard deviation
10	ws *	The speed of horizontal air movement in metres per second.	The speed of horizontal air movement in metres per second.	m s-1	1	ENS		TBC		TBC
130	t *	This parameter is the temperature in the atmosphere.	This parameter is the temperature in the atmosphere.	K	1	ENS		TBC		TBC
* These parameters have been added at 250 hPa.
Extreme Forecast Index (EFI) & Shift Of Tails (SOT)
132045	wvfi	Water vapour flux index	EFI and SOT for water vapour flux. See also here.	(-1 to 1)	1	ENS		TBC		TBC
132167	2ti	2 metre temperature index	EFI and SOT for weekly mean temperature (out to week 6). See also here.	(-1 to 1)	1	ENS-EXTENDED		TBC		TBC
132228	tpi	Total precipitation index	EFI and SOT for 1 week total precipitation (out to week 6). See also here.	(-1 to 1)	1	ENS-EXTENDED		TBC		TBC

Changes in Cycle 46r1 data

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With Cycle 46r1, the EFI and SOT become available in the extended-range forecast for two parameters: 7-day mean of 2m temperature and 7-day total precipitation. In contrast to the medium range, the model climate is derived from a set of 3 (rather than 9) re-forecast run dates, centred on the date of the real-time forecast initialisation (all are from 00UTC). The climate sample size is therefore much smaller and comprises 660 values compared to 1980 used in the medium range, but this does make the EFI and SOT consistent with other climate-related products from the extended-range forecasts, such as anomalies and probabilities.  See also here.

New climatology for 850hPa Temperature anomaly probabilities 

The outdated fixed climatology for computing historical 850hPa temperature anomaly probability parameters 131020 (talm2), 131021 (tag2), 131022 (talm8), 131023 (talm4), 131024 (tag4) and 131025 (tag8) is replaced by a new re-forecast-based climatology. The same climatology is also used to compute the Cycle 46r1 new (standard-deviation-related) 850hPa temperature anomaly probability parameters listed above. The new climatology is much more compatible with the real-time forecast.  See also here.

A change to the computation of maximum CAPE and maximum CAPE-shear parameters 

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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 46r1 test data by using the limited ECaccess 'events' set up for this purpose:

For these events, MSJ_EXPVER environment variable is set to 0073 and can be used to specify the IFS Cycle 46r1 test data in any MARS retrievals.

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