AIFS-SUBS reforecasts

Title AIFS-SUBS reforecasts
Description 20-year reforecast of AIFS-SUBS: - 10 ensemble members - 46-days forecast of 24h instantaneous time-step (00UTC) - Reference days: every odd day in 2026 - Initialization: ERA5 recentered EDA More information about the model and the data can be found in the preprint: https://arxiv.org/abs/2607.05100
DOI 10.21957/3pt9-xe41
Experiment ID j339
Experiment class ECMWF Research Department
Examples

AIFS-SUBS 46-day reforecast of temperature at 850hPa initialized on hdate=2006-01-01 (date=2026-01-01, 10 members)

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

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2026-01-01",
    "expver": "j339",
    "hdate": "2006-01-01",
    "levelist": "850",
    "levtype": "pl",
    "number": "1/2/3/4/5/6/7/8/9/10",
    "param": "130.128",
    "step": "0/24/48/72/96/120/144/168/192/216/240/264/288/312/336/360/384/408/432/456/480/504/528/552/576/600/624/648/672/696/720/744/768/792/816/840/864/888/912/936/960/984/1008/1032/1056/1080/1104",
    "stream": "enfh",
    "target": "output",
    "time": "00:00:00",
    "type": "pf"
})

AIFS-SUBS 46-day reforecast of accumulated total precipitation initialized on hdate=2006-01-01 (date=2026-01-01, 10 members)

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

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2026-01-01",
    "expver": "j339",
    "hdate": "2006-01-01",
    "levtype": "sfc",
    "number": "1/2/3/4/5/6/7/8/9/10",
    "param": "228.128",
    "step": "24",
    "stream": "enfh",
    "target": "output",
    "time": "00:00:00",
    "type": "pf"
})