# Data Assimilation on ERA5 2022-01-03 06 UTC snapshot v1 (test) Source: [Data Assimilation on ERA5 2022-01-03 06 UTC snapshot v1 (test)]() Collection index: [llms.txt]() Data updated: 2026-02-26T06:05:49.931Z Evaluation of Data Assimilation performance using a specific snapshot of the ERA5 dataset from January 3rd, 2022 (06 UTC), measured across key atmospheric variables like T2M, MSLP, and various pressure level components (z500, t850, etc.). A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. | Scope | Recorded value | | --- | --- | | Task | Data Assimilation | | Dataset (including any stated split) | ERA5 2022-01-03 06 UTC snapshot v1 (test) | | Metric | T2M (Temp 2m) | | Unit | SCALAR | | Direction | Lower is better | | Results loaded | 16 of 16 | | Coverage | All results currently returned for this benchmark | Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol. ## Metrics - [T2M (Temp 2m)](): Lower is better; unit: SCALAR. - [U10 (Zonal Wind 10m)](): Lower is better; unit: SCALAR. - [V10 (Meridional Wind 10m)](): Lower is better; unit: SCALAR. - [MSLP Error](): Lower is better; unit: SCALAR. - [Q100 (Specific Humidity 1000hPa)](): Lower is better; unit: SCALAR. - [U300 (Zonal Wind 300hPa)](): Lower is better; unit: SCALAR. - [V300 (Meridional Wind 300hPa)](): Lower is better; unit: SCALAR. - [Z500 (Geopotential Height 500hPa)](): Lower is better; unit: SCALAR. - [T850 (Temp 850hPa)](): Lower is better; unit: SCALAR. ## Recorded results | Method | T2M (Temp 2m) | Result date | Report paper | | --- | --- | --- | --- | | FlowDA-Full | 0.54 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-LoRA | 0.56 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | DiffDA | 0.58 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA | 0.64 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-Full | 0.71 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-LoRA | 0.74 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-Full | 0.84 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-LoRA | 0.87 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | DiffDA | 0.93 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA | 0.96 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-Full | 1.02 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA-LoRA | 1.07 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | DiffDA | 1.21 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | DiffDA | 1.27 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | FlowDA | 1.33 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | | DiffDA | 1.49 | Not recorded | 698969ffc97a0b3e3b5dc4e0 | ### FlowDA-Full T2M (Temp 2m): 0.54. Result ID: 6998e5485698665ec4499c1b. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"3.9%","number\_of\_parameters":"113M"}. This record does not assert independent reproduction. ### FlowDA-LoRA T2M (Temp 2m): 0.56. Result ID: 6998e5485698665ec4499c1c. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"3.9%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### DiffDA T2M (Temp 2m): 0.58. Result ID: 6998e5485698665ec4499c1d. [Reporting paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"3.9%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### FlowDA T2M (Temp 2m): 0.64. Result ID: 6998e5485698665ec4499c17. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"forecast\_state":"t - 7"}. This record does not assert independent reproduction. ### FlowDA-Full T2M (Temp 2m): 0.71. Result ID: 6998e5485698665ec4499c1e. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"1.0%","number\_of\_parameters":"113M"}. This record does not assert independent reproduction. ### FlowDA-LoRA T2M (Temp 2m): 0.74. Result ID: 6998e5485698665ec4499c1f. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"1.0%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### FlowDA-Full T2M (Temp 2m): 0.84. Result ID: 6998e5485698665ec4499c21. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.4%","number\_of\_parameters":"113M"}. This record does not assert independent reproduction. ### FlowDA-LoRA T2M (Temp 2m): 0.87. Result ID: 6998e5485698665ec4499c22. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.4%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### DiffDA T2M (Temp 2m): 0.93. Result ID: 6998e5485698665ec4499c20. [Reporting paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"1.0%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### FlowDA T2M (Temp 2m): 0.96. Result ID: 6998e5485698665ec4499c18. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"forecast\_state":"t - 4"}. This record does not assert independent reproduction. ### FlowDA-Full T2M (Temp 2m): 1.02. Result ID: 6998e5485698665ec4499c24. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.1%","number\_of\_parameters":"113M"}. This record does not assert independent reproduction. ### FlowDA-LoRA T2M (Temp 2m): 1.07. Result ID: 6998e5485698665ec4499c25. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.1%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### DiffDA T2M (Temp 2m): 1.21. Result ID: 6998e5485698665ec4499c23. [Reporting paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.4%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. ### DiffDA T2M (Temp 2m): 1.27. Result ID: 6998e5485698665ec4499c1a. [Reporting paper]() Recorded evaluation configuration: {"forecast\_state":"t (background)"}. This record does not assert independent reproduction. ### FlowDA T2M (Temp 2m): 1.33. Result ID: 6998e5485698665ec4499c19. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"forecast\_state":"t (background)"}. This record does not assert independent reproduction. ### DiffDA T2M (Temp 2m): 1.49. Result ID: 6998e5485698665ec4499c26. [Reporting paper]() Recorded evaluation configuration: {"observation\_rate\_alpha":"0.1%","number\_of\_parameters":"37M"}. This record does not assert independent reproduction. Page 1 of 1. This is an index page, not the full collection.