Datasets

This data set contains net fluxes at the surface, atmospheric mixing ratios at model levels, for carbon dioxide (CO2), methane (CH4) and nitrous oxide (N20).

Each country's experiments can be accessed via the links below:

Some Member States also archive output other than from IFS into MARS. One example of such activity is the COSMO-LEPS forecast suite, running daily at ECMWF.

These are experiments created by ECMWF Member States.

The reliability diagram shows the reliability of the ECMWF seasonal forecast system (SEAS5) with ...

This chart shows the Relative Operating Characteristics (ROC) diagram for the three-month ...

This chart shows the spatial variation in the Relative Operating Characteristics (ROC) skill ...

The ECMWF seasonal forecasts (SEAS5) are produced every month with a 51-member ensemble at a ...

The 850 hPa level is usually just above the boundary layer and at this level the day-night variation in temperature is generally negligible...

This chart shows 7-day mean anomalies of 500hPa geopotential height from the ECMWF Sub-seasonal ...

500-1000 hPa thickness is a measure of the mean temperature of a column of the atmosphere between these pressure levels and can be used to distinguish between warm and cold air masses and...

This is an extension of the i4ql experiment covering the period 2025-07-27 to 2023-08-10

Examples

Control experiment (CTRL) for an assimilation test with near-real time TROPOMI total column CO data (exp=hmib) using the CAMS CY47R3 configuration. In CTRL, MOPITT TIR and IASI TCCO are assimilated, but TROPOMI TCCO data are passive.

Examples

Retrieval of total column CO analysis

Analysis experiment (ASSIM) testing the assimilation of near-real time TROPOMI total column CO data in the CAMS CY47R3 system for the period 6/7-31/12/2021 (in addition to already assimilated MOPITT TIR and IASI TCCO).

Examples

Retrieval of total column CO analysis

Control experiment for a series of SO2 assimilation tests for the 2019 Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In BLexp (hhu5) ESA NRT SO2 data were assimilated.

Examples

Retrieval of total column SO2 forecast at step 24

Layer height experiment for a series of SO2 assimilation tests for the 2019 Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In LH1.4 (hgz7) SO2 Layer Height data produced with FP_ILM (V3.1) were assimilated with SO2 background error standard deviation values of 1.4e-7 kg/kg and horizontal background error correlation length scale of 100 km.

Examples

Layer height experiment for a series of SO2 assimilation tests for the Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In LH100 (hhtm) SO2 Layer Height data produced with FP_ILM (V3.1) were assimilated with SO2 background error standard deviation values of 1e-7 kg/kg and horizontal background error correlation length scale of 100 km.

Examples

Layer height experiment for a series of SO2 assimilation tests for the 2019 Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In LH250 (hhtn) SO2 Layer Height data produced with FP_ILM (V3.1) were assimilated with SO2 background error standard deviation values of 1e-7 kg/kg and horizontal background error correlation length scale of 250 km.

Examples

Layer height experiment for a series of SO2 assimilation tests for the 2019 Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In LH50 (hhbu) SO2 Layer Height data produced with FP_ILM (V3.1) were assimilated with SO2 background error standard deviation values of 1e-7 kg/kg and horizontal background error correlation length scale of 50 km.

Examples

Layer height experiment for a series of SO2 assimilation tests for the 2019 Raikoke eruption with the CAMS system which assess the impact of assimilating SO2 layer height data (V3.1 FP_ILM). In LHexp (hgze) SO2 Layer Height data produced with FP_ILM (V3.1) were assimilated with SO2 background error standard deviation values of 0.7e-7 kg/kg and horizontal background error correlation length scale of 100 km.

Examples

Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 8 ENS members. Control for the nudged experiments. 00/12UTC start from 1 December 2024 to 28 February 2025.

Examples

Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 8 ENS members. Control for the nudged experiments. 00/12UTC start from 1 July 2024 to 12 November 2024.

Examples

Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 8 members. Vorticity and virtual temperature below tropopause nudged to equivalent members from model level AIFS-CRPS ML model for total wavenumbers <21. 00/12UTC start from 1 July 2024 to 30 September 2024. Only perturbed forecasts should be analysed.

Examples

Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 8 members. Vorticity and virtual temperature below tropopause nudged to equivalent members from model level AIFS-CRPS ML model for total wavenumbers <21. 00/12UTC start from 1 December 2024 to 28 February 2025. Only perturbed forecasts should be analysed.

Examples

Probabilistic 15-day TCo1279L137 forecast with CY49R1.1. 8 members. Vorticity and virtual temperature below tropopause nudged to equivalent members from model level AIFS-CRPS ML model for total wavenumbers <21. 00/12UTC start from 1 October 2024 to 12 November 2024. Only perturbed forecasts should be analysed.

Examples