# Feedback and requirements **URL:** https://forum.ecmwf.int/c/feedback-and-requirements/29.md [Latest](https://forum.ecmwf.int/latest.md) · [Categories](https://forum.ecmwf.int/categories.md) · [Tags](https://forum.ecmwf.int/tags.md) --- ## [About the Feedback and requirements category](https://forum.ecmwf.int/t/about-the-feedback-and-requirements-category/35)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [23 December 2023 09:05 UTC](https://forum.ecmwf.int/t/about-the-feedback-and-requirements-category/35 "2023-12-23T09:05:36Z")
For letting us know your thoughts! --- ## [ERA5 last date available in metadata in ARCO](https://forum.ecmwf.int/t/era5-last-date-available-in-metadata-in-arco/15398)
**Author:** [@Jesica\_Pinon\_Rodriguez](https://forum.ecmwf.int/u/Jesica_Pinon_Rodriguez)\ **Replies:** 0\ **Last updated:** [9 October 2026 14:09 UTC](https://forum.ecmwf.int/t/era5-last-date-available-in-metadata-in-arco/15398 "2026-10-09T14:09:00Z")
Hi! Would it be possible to distinguish between ERA5 and ERA5T directly from the Zarr file metadata? For example, adding an attribute that specifies the last date covered by the finalized ERA5 archive would allow users … --- ## [The ERA5 hourly on single level for 2m dewpoint temperature data for 1968 contain duplicate timestamps](https://forum.ecmwf.int/t/the-era5-hourly-on-single-level-for-2m-dewpoint-temperature-data-for-1968-contain-duplicate-timestamps/15331)
**Author:** [@Hui\_Wan](https://forum.ecmwf.int/u/Hui_Wan)\ **Replies:** 0\ **Last updated:** [18 September 2026 14:38 UTC](https://forum.ecmwf.int/t/the-era5-hourly-on-single-level-for-2m-dewpoint-temperature-data-for-1968-contain-duplicate-timestamps/15331 "2026-09-18T14:38:47Z")
Please double check the data. Thanks. --- ## [Help shape the future of ERA5 reanalysis data](https://forum.ecmwf.int/t/help-shape-the-future-of-era5-reanalysis-data/15164)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 1\ **Last updated:** [27 August 2026 11:16 UTC](https://forum.ecmwf.int/t/help-shape-the-future-of-era5-reanalysis-data/15164 "2026-08-27T11:16:42Z")
Do you use ERA5 for research, operational activities, decision-making, education or commercial applications? We would like to hear about your experience. This short survey aims to understand how ERA5 data are used in… --- ## [Survey: Your opinion matters! Help us shaping the future of C3S agro-climatic indicators and tools](https://forum.ecmwf.int/t/survey-your-opinion-matters-help-us-shaping-the-future-of-c3s-agro-climatic-indicators-and-tools/15143)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 2\ **Last updated:** [7 August 2026 15:37 UTC](https://forum.ecmwf.int/t/survey-your-opinion-matters-help-us-shaping-the-future-of-c3s-agro-climatic-indicators-and-tools/15143 "2026-08-07T15:37:44Z")
We re inviting users of C3S agro-climatic data and tools to take part in a short survey designed to improve how climate information supports agriculture. Your experience — whether you actively use climate data or not — c… --- ## [Spatial Shiftment in the River discharge and related forecasted data by the European Flood Awareness System](https://forum.ecmwf.int/t/spatial-shiftment-in-the-river-discharge-and-related-forecasted-data-by-the-european-flood-awareness-system/15135)
**Author:** [@Ersat\_Unal](https://forum.ecmwf.int/u/Ersat_Unal)\ **Replies:** 1\ **Last updated:** [13 July 2026 08:41 UTC](https://forum.ecmwf.int/t/spatial-shiftment-in-the-river-discharge-and-related-forecasted-data-by-the-european-flood-awareness-system/15135 "2026-07-13T08:41:32Z")
As part of an ongoing study on the impacts of climate change on water resources and flood forecasting in Türkiye, I have been analyzing discharge datasets obtained from EFAS (European Flood Awareness System) and GloFAS (… --- ## [ARCO dataset urls missing in the documentation](https://forum.ecmwf.int/t/arco-dataset-urls-missing-in-the-documentation/15087)
**Author:** [@Leonard\_Mueller](https://forum.ecmwf.int/u/Leonard_Mueller)\ **Replies:** 2\ **Last updated:** [1 July 2026 11:37 UTC](https://forum.ecmwf.int/t/arco-dataset-urls-missing-in-the-documentation/15087 "2026-07-01T11:37:22Z")
Hello, I am quite happy to hear that the climdatastore is starting to integrate Zarr based ARCO data hosted in object storage. We use zarr hosted on object storage internally and have made very good experiences in terms… --- ## [Seasonal forecast ensemble mean for hindcast](https://forum.ecmwf.int/t/seasonal-forecast-ensemble-mean-for-hindcast/15058)
**Author:** [@Piotr\_Wolski](https://forum.ecmwf.int/u/Piotr_Wolski)\ **Replies:** 0\ **Last updated:** [8 June 2026 18:48 UTC](https://forum.ecmwf.int/t/seasonal-forecast-ensemble-mean-for-hindcast/15058 "2026-06-08T18:48:16Z")
Would it be possible to make the ensemble mean of seasonal forecast data available for the hindcast? That would be really useful for development of MOS postprocessing that is based on statistical models against ensemble … --- ## [ERA5 hourly data on pressure levels from 1940 to present Data is worong](https://forum.ecmwf.int/t/era5-hourly-data-on-pressure-levels-from-1940-to-present-data-is-worong/14457)
**Author:** [@Muran\_Jiang](https://forum.ecmwf.int/u/Muran_Jiang)\ **Replies:** 0\ **Last updated:** [24 November 2025 14:17 UTC](https://forum.ecmwf.int/t/era5-hourly-data-on-pressure-levels-from-1940-to-present-data-is-worong/14457 "2025-11-24T14:17:11Z")
ERA5 hourly data on pressure levels from 1940 to present. 2010.03 is wrong, download is 2009.04 --- ## [ERA5 netcdf encoding since the new CDSAPI release](https://forum.ecmwf.int/t/era5-netcdf-encoding-since-the-new-cdsapi-release/8146)
**Author:** [@jerome\_LEFEVRE](https://forum.ecmwf.int/u/jerome_LEFEVRE)\ **Replies:** 3\ **Last updated:** [11 November 2025 08:48 UTC](https://forum.ecmwf.int/t/era5-netcdf-encoding-since-the-new-cdsapi-release/8146 "2025-11-11T08:48:41Z")
Hi, I noticed that the result of requests in netCDF format for ERA5 product (reanalysis-era5-single-levels) are now declared in double precision. Before, the results were in short, with add\_offset and scale\_factor to co… --- ## [Suggestion: Expose metadata to reference management software](https://forum.ecmwf.int/t/suggestion-expose-metadata-to-reference-management-software/13860)
**Author:** [@Olivier\_Burggraaff](https://forum.ecmwf.int/u/Olivier_Burggraaff)\ **Replies:** 0\ **Last updated:** [22 July 2025 10:59 UTC](https://forum.ecmwf.int/t/suggestion-expose-metadata-to-reference-management-software/13860 "2025-07-22T10:59:28Z")
It would be really convenient if CDS catalogue entries – and Confluence pages if possible – exposed citation metadata in a format that reference management software (Zotero, Mendeley, EndNote) can understand. For exampl… --- ## [Unable to download data](https://forum.ecmwf.int/t/unable-to-download-data/13239)
**Author:** [@Kaushik\_Ghosal](https://forum.ecmwf.int/u/Kaushik_Ghosal)\ **Replies:** 0\ **Last updated:** [28 May 2025 11:37 UTC](https://forum.ecmwf.int/t/unable-to-download-data/13239 "2025-05-28T11:37:18Z")
Hi I am trying to download “Gridded monthly climate projection dataset underpinning the IPCC AR6 Interactive Atlas” data and “CMIP6 climate projections”. But it is showing Queued since a day. What to do? --- ## [about the changes in data](https://forum.ecmwf.int/t/about-the-changes-in-data/12760)
**Author:** [@zh\_lei](https://forum.ecmwf.int/u/zh_lei)\ **Replies:** 0\ **Last updated:** [24 April 2025 08:20 UTC](https://forum.ecmwf.int/t/about-the-changes-in-data/12760 "2025-04-24T08:20:11Z")
hello,i’m a student of climate research,and i found a problem when i downloaded the data,andthe data i downloaded was in the format of netcdf4,when i open the data,i find that there is no change in time and the name of e… --- ## [Announcements and service disruptions via email](https://forum.ecmwf.int/t/announcements-and-service-disruptions-via-email/7843)
**Author:** [@Imanol\_Uriarte\_Latorre](https://forum.ecmwf.int/u/Imanol_Uriarte_Latorre)\ **Replies:** 1\ **Last updated:** [4 December 2024 14:08 UTC](https://forum.ecmwf.int/t/announcements-and-service-disruptions-via-email/7843 "2024-12-04T14:08:07Z")
Yesterday there was a disruption on the service, and following your status page (https://status.ecmwf.int/) some user action is required. Would if be possible to get these kind of information via email? Same for announc… --- ## [Zarr access to datasets](https://forum.ecmwf.int/t/zarr-access-to-datasets/7964)
**Author:** [@iglesiasd](https://forum.ecmwf.int/u/iglesiasd)\ **Replies:** 1\ **Last updated:** [27 November 2024 08:48 UTC](https://forum.ecmwf.int/t/zarr-access-to-datasets/7964 "2024-11-27T08:48:36Z")
Good morning, Just asking, Is there at ECMWF any way to access data in a cloud native way using Zarr? Does not need to be a production product, only for testing as use case. Thank everyone, --- ## [Checksums for request](https://forum.ecmwf.int/t/checksums-for-request/7884)
**Author:** [@Peter\_McEvoy](https://forum.ecmwf.int/u/Peter_McEvoy)\ **Replies:** 0\ **Last updated:** [25 November 2024 16:47 UTC](https://forum.ecmwf.int/t/checksums-for-request/7884 "2024-11-25T16:47:31Z")
Hi, sometimes data on CDS gets updated with fixes and/or the variables change names (such as the upgrade from netcdf3 to netcdf4). I would like to know that the data I have downloaded is up-to-date, without having to d… --- ## [Bad performance in data download](https://forum.ecmwf.int/t/bad-performance-in-data-download/7220)
**Author:** [@Juan\_Ramos](https://forum.ecmwf.int/u/Juan_Ramos)\ **Replies:** 9\ **Last updated:** [12 November 2024 09:05 UTC](https://forum.ecmwf.int/t/bad-performance-in-data-download/7220 "2024-11-12T09:05:05Z")
Hello, I’m really surprised by the latest poor downloading performance of both the API and the online page. I just don’t understand why is the whole thing being slower and overall in a worse shape to what it was on prev… --- ## [CAMS user satisfaction survey - Summer 2023](https://forum.ecmwf.int/t/cams-user-satisfaction-survey-summer-2023/1523)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [31 May 2023 08:33 UTC](https://forum.ecmwf.int/t/cams-user-satisfaction-survey-summer-2023/1523 "2023-05-31T08:33:52Z")
The Copernicus Atmosphere Monitoring Service (CAMS) is user-driven. We want to hear how satisfied you are with our products and services and what your needs are so that we can direct the service evolution accordingly and… --- ## [CAMS user satisfaction survey - Spring 2023](https://forum.ecmwf.int/t/cams-user-satisfaction-survey-spring-2023/1004)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [1 March 2023 10:22 UTC](https://forum.ecmwf.int/t/cams-user-satisfaction-survey-spring-2023/1004 "2023-03-01T10:22:36Z")
The Copernicus Atmosphere Monitoring Service (CAMS) is user-driven. We want to hear how satisfied you are with our products and services and what your needs are so that we can direct the service evolution accordingly and… --- ## [Online CAMS user satisfaction survey launched!](https://forum.ecmwf.int/t/online-cams-user-satisfaction-survey-launched/1532)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [14 October 2022 08:37 UTC](https://forum.ecmwf.int/t/online-cams-user-satisfaction-survey-launched/1532 "2022-10-14T08:37:30Z")
We have launched our CAMS user satisfaction survey! The Copernicus Atmosphere Monitoring Service (C3S) is user-driven. We want to hear how satisfied you are with our products and services and what your needs are so tha… --- ## [Temperature Product Colour Scales](https://forum.ecmwf.int/t/temperature-product-colour-scales/12356)
**Author:** [@Rebecca\_Emerton](https://forum.ecmwf.int/u/Rebecca_Emerton)\ **Replies:** 10\ **Last updated:** [1 February 2022 16:00 UTC](https://forum.ecmwf.int/t/temperature-product-colour-scales/12356 "2022-02-01T16:00:59Z")
Discussion of temperature forecast products and colour scales, particularly for extreme temperatures. --- ## [Changes in tropical precipitation forecasts since implementation of 47r3](https://forum.ecmwf.int/t/changes-in-tropical-precipitation-forecasts-since-implementation-of-47r3/12354)
**Author:** [@Rebecca\_Emerton](https://forum.ecmwf.int/u/Rebecca_Emerton)\ **Replies:** 5\ **Last updated:** [13 January 2022 17:24 UTC](https://forum.ecmwf.int/t/changes-in-tropical-precipitation-forecasts-since-implementation-of-47r3/12354 "2022-01-13T17:24:54Z")
On 12th October 2021, IFS cycle 47r3 was implemented, which included the new "Moist Physics" package, and as such, there have been changes in the characteristics of many forecast fields. Further information on the impa… --- ## [Training Course Ideas](https://forum.ecmwf.int/t/training-course-ideas/12375)
**Author:** [@Rebecca\_Emerton](https://forum.ecmwf.int/u/Rebecca_Emerton)\ **Replies:** 2\ **Last updated:** [29 December 2021 09:58 UTC](https://forum.ecmwf.int/t/training-course-ideas/12375 "2021-12-29T09:58:41Z")
Do you have an idea for training you'd like to see provided by ECMWF or a topic you'd like to see covered in one of our training courses? Leave a comment below and ideas will be considered for future training. --- ## [CAMS Annual User Survey Satisfaction 2020 launched!](https://forum.ecmwf.int/t/cams-annual-user-survey-satisfaction-2020-launched/957)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [17 June 2020 13:43 UTC](https://forum.ecmwf.int/t/cams-annual-user-survey-satisfaction-2020-launched/957 "2020-06-17T13:43:45Z")
We have launched our annual user survey satisfaction survey 2020! In order to meet your user needs we are continuously improving our services. We want to hear your feedback on the Copernicus Atmosphere Monitoring Servic… --- ## [Wekeo website interview](https://forum.ecmwf.int/t/wekeo-website-interview/1457)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [26 September 2019 13:15 UTC](https://forum.ecmwf.int/t/wekeo-website-interview/1457 "2019-09-26T13:15:33Z")
Dear C3S users, ECMWF has involved with Wekeo, one of the 5 Copernicus Data and Information Access Services (DIAS) instances, which is going to update the version of a cloud-based platform providing centralised access t…