50-mem ENS forecast with CY49R1.1, nudged to AIFS-CRPS-ML. 20 Oct 25-12 May 26 (6 March 26 missing).

Title 50-mem ENS forecast with CY49R1.1, nudged to AIFS-CRPS-ML. 20 Oct 25-12 May 26 (6 March 26 missing).
Description Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 50 ENS members. Nudged to AIFS-ENS-ML up to total wavenumber T21 for Tv and VO from surface to the tropopause. 00UTC start from 20 Oct 2025 to 12 May 2026. Note that 6 March 26 is missing. Control run for this is ECMWF operational ENS forecasts.
DOI 10.21957/46fw-vr26
Experiment ID iy2u
Experiment class ECMWF Research Department
Examples

Retrieve T/U/V for 50 perturbed members and all forecast steps for start date of 1 January 2026

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2026-01-01",
    "expver": "iy2u",
    "levelist": "10/30/50/70/100/200/250/500/700/850/925/1000",
    "levtype": "pl",
    "number": "1/to/50/by/1",
    "param": "130.128/131/132",
    "step": "0/12/24/36/48/60/72/84/96/108/120/132/144/156/168/180/192/204/216/228/240/252/264/276/288/300/312/324/336/348/360",
    "stream": "enfo",
    "target": "output",
    "time": "00:00:00",
    "type": "pf"
})

Retrieve 2m t for all perturbed members and all forecast steps for start date of 1 January 2026

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2026-01-01",
    "expver": "iy2u",
    "levtype": "sfc",
    "number": "1/to/50/by/1",
    "param": "167.128",
    "step": "0/6/12/18/24/30/36/42/48/54/60/66/72/78/84/90/96/102/108/114/120/126/132/138/144/150/156/162/168/174/180/186/192/198/204/210/216/222/228/234/240/246/252/258/264/270/276/282/288/294/300/306/312/318/324/330/336/342/348/354/360",
    "stream": "enfo",
    "target": "output",
    "time": "00:00:00",
    "type": "pf"
})