Lower-resolution extended-range reforecasts for the period 1980-2020 (47R3)

Title Lower-resolution extended-range reforecasts for the period 1980-2020 (47R3)
Description An 11-member coupled IFS (cycle 47R3) extended-range reforecast experiment covering the period 1980-2020 with forecasts initialized on the 1st and 15th of each month. The atmosphere is configured with 137 vertical levels and uses the Tco199 cubic octahedral reduced Gaussian grid. The IFS is coupled hourly to the 75 level version of the NEMO v3.4 ocean model and the LIM2 sea-ice model, both of which use the ORCA1 tripolar grid. Coupling follows the implementation used in ECMWF CY47R3 operational reforecasts. Atmospheric fields are initialized from the ERA5 reanalysis and ocean and sea-ice initial conditions are derived from the 5-member OCEAN5 ensemble (re)analysis. Ensemble spread in coupled forecasts is generated through a combination of initial condition perturbations and stochastic parameterizations in the atmospheric model.
DOI 10.21957/e8v4-9954
Experiment ID hnll
Experiment class ECMWF Research Department
Examples

Perturbed member pressure level data for January 1st 1980 reforecasts

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

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2021-01-01",
    "expver": "hnll",
    "hdate": "1980-01-01",
    "levelist": "10/50/100/200/250/500/700/850/1000",
    "levtype": "pl",
    "number": "1/2/3/4/5/6/7/8/9/10",
    "param": "129.128/130.128/131/132/133.128/135.128/138.128/155.128/157.128",
    "step": "0/12/24/36/48/60/72/84/96/108/120/132/144/156/168/180/192/204/216/228/240/252/264/276/288/300/312/324/336/348/360/372/384/396/408/420/432/444/456/468/480/492/504/516/528/540/552/564/576/588/600/612/624/636/648/660/672/684/696/708/720/732/744/756/768/780/792/804/816/828/840/852/864/876/888/900/912/924/936/948/960/972/984/996/1008/1020/1032/1044/1056/1068/1080/1092/1104",
    "stream": "enfh",
    "target": "pressure_level_data.grb",
    "time": "00:00:00",
    "type": "pf"
})

Perturbed member surface data for January 1st 1980 reforecasts

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

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2021-01-01",
    "expver": "hnll",
    "hdate": "1980-01-01",
    "levtype": "sfc",
    "number": "1/2/3/4/5/6/7/8/9/10",
    "param": "1.228/20.3/29.228/31.128/32.128/33.128/34.128/35.128/36.128/37.128/38.128/39.128/40.128/41.128/42.128/47.128/49.128/98.174/129.128/130.151/131.151/132.151/136.128/137.128/139.128/141.128/142.128/143.128/144.128/145.128/145.151/146.128/147.128/148.128/148.151/151.128/159.128/163.151/164.128/164.151/165.128/166.128/167.128/168.128/169.128/170.128/172.128/173.128/174.128/175.128/175.151/176.128/177.128/178.128/179.128/180.128/181.128/182.128/183.128/186.128/187.128/188.128/189.128/197.128/198.128/201.128/202.128/205.128/216.228/217.228/218.228/219.228/220.228/221.228/228.128/235.128/236.128/238.128/243.128/244.128/251.228/228050/260015/260121/260123",
    "step": "0/12/24/36/48/60/72/84/96/108/120/132/144/156/168/180/192/204/216/228/240/252/264/276/288/300/312/324/336/348/360/372/384/396/408/420/432/444/456/468/480/492/504/516/528/540/552/564/576/588/600/612/624/636/648/660/672/684/696/708/720/732/744/756/768/780/792/804/816/828/840/852/864/876/888/900/912/924/936/948/960/972/984/996/1008/1020/1032/1044/1056/1068/1080/1092/1104",
    "stream": "enfh",
    "target": "surface_data.grb",
    "time": "00:00:00",
    "type": "pf"
})