# C3S - Datasets and Usage **URL:** https://forum.ecmwf.int/c/datasets-and-usage/c3s-datasets-and-usage/15.md [Latest](https://forum.ecmwf.int/latest.md) · [Categories](https://forum.ecmwf.int/categories.md) · [Tags](https://forum.ecmwf.int/tags.md) --- ## [About the C3S - Datasets and Usage category](https://forum.ecmwf.int/t/about-the-c3s-datasets-and-usage-category/21)
**Author:** [@Frank\_Lieber](https://forum.ecmwf.int/u/Frank_Lieber)\ **Replies:** 1\ **Last updated:** [1 April 2025 12:17 UTC](https://forum.ecmwf.int/t/about-the-c3s-datasets-and-usage-category/21 "2025-04-01T12:17:35Z")
For discussions and information about Copernicus Climate Change Service (C3S) datasets --- ## [Cordex-EUR11 data has band patterns in data values](https://forum.ecmwf.int/t/cordex-eur11-data-has-band-patterns-in-data-values/15363)
**Author:** [@Merijn\_van\_den\_Bosch](https://forum.ecmwf.int/u/Merijn_van_den_Bosch)\ **Replies:** 4\ **Last updated:** [15 October 2026 13:02 UTC](https://forum.ecmwf.int/t/cordex-eur11-data-has-band-patterns-in-data-values/15363 "2026-10-15T13:02:17Z")
Hello, I am currently working with both temperature and SPEI data from Cordex-EUR11. All is working well, but I’ve noticed some kind of unnatural splits in the data values which form longitudinal lines in the Eastern p… --- ## [ESA CCI LC - Landcover - 23, 24, 25 - Updates?](https://forum.ecmwf.int/t/esa-cci-lc-landcover-23-24-25-updates/15175)
**Author:** [@JOHN\_WILSHIRE](https://forum.ecmwf.int/u/JOHN_WILSHIRE)\ **Replies:** 2\ **Last updated:** [13 October 2026 10:51 UTC](https://forum.ecmwf.int/t/esa-cci-lc-landcover-23-24-25-updates/15175 "2026-10-13T10:51:26Z")
Hi, It has been a couple of weeks since I asked for an update regarding this dataset: But I haven’t had a response. This makes it difficult to plan and use these products in a variety of downstream applications rel… --- ## [Need help downloading globally ERA5-Land hourly/daily data faster (CDS too slow)](https://forum.ecmwf.int/t/need-help-downloading-globally-era5-land-hourly-daily-data-faster-cds-too-slow/14920)
**Author:** [@Bacha\_khan](https://forum.ecmwf.int/u/Bacha_khan)\ **Replies:** 8\ **Last updated:** [13 October 2026 04:02 UTC](https://forum.ecmwf.int/t/need-help-downloading-globally-era5-land-hourly-daily-data-faster-cds-too-slow/14920 "2026-10-13T04:02:05Z")
Please, can anyone help me? I’m trying to download ERA5-Land data (hourly and daily), but I’m facing serious issues. I have checked many sources, but I still haven’t been able to get the complete dataset. I tried downl… --- ## [403 Client Error while downloading 1 day of Europe constrained ERA5 data](https://forum.ecmwf.int/t/403-client-error-while-downloading-1-day-of-europe-constrained-era5-data/15337)
**Author:** [@Sofia\_Gomez\_Maqueo\_Anaya](https://forum.ecmwf.int/u/Sofia_Gomez_Maqueo_Anaya)\ **Replies:** 12\ **Last updated:** [13 October 2026 00:29 UTC](https://forum.ecmwf.int/t/403-client-error-while-downloading-1-day-of-europe-constrained-era5-data/15337 "2026-10-13T00:29:16Z")
Hi all, I am trying to download ERA5 data using api as a public user. I had downloaded the same dataset before a few times now and I had not encountered this error until now. The downloading of the data is done through… --- ## [Best strategy to retrieve two years of model-level data (403 Client Error)](https://forum.ecmwf.int/t/best-strategy-to-retrieve-two-years-of-model-level-data-403-client-error/15370)
**Author:** [@Lorenzo\_Luca\_Donati](https://forum.ecmwf.int/u/Lorenzo_Luca_Donati)\ **Replies:** 8\ **Last updated:** [9 October 2026 11:03 UTC](https://forum.ecmwf.int/t/best-strategy-to-retrieve-two-years-of-model-level-data-403-client-error/15370 "2026-10-09T11:03:49Z")
Hi all, I am currently trying to retrieve two years of model level data from a series of locations. Up until a month ago everything worked seamlessly for another set of locations, while now I get an error if I try to ru… --- ## [ERA5-Land GRIB files: latitude and longitude bounds](https://forum.ecmwf.int/t/era5-land-grib-files-latitude-and-longitude-bounds/15388)
**Author:** [@Francisco\_Diogo\_Mendonca](https://forum.ecmwf.int/u/Francisco_Diogo_Mendonca)\ **Replies:** 0\ **Last updated:** [7 October 2026 08:45 UTC](https://forum.ecmwf.int/t/era5-land-grib-files-latitude-and-longitude-bounds/15388 "2026-10-07T08:45:42Z")
Hi everyone, I’m checking the coordinates in ERA5-Land GRIB files and noticed that, for some variables (evaporation from bare soil, evaporation from open water surfaces excluding oceans, evaporation from the top of cano… --- ## [Recommended strategy for bulk downloads](https://forum.ecmwf.int/t/recommended-strategy-for-bulk-downloads/14888)
**Author:** [@David\_Orme](https://forum.ecmwf.int/u/David_Orme)\ **Replies:** 9\ **Last updated:** [26 September 2026 15:49 UTC](https://forum.ecmwf.int/t/recommended-strategy-for-bulk-downloads/14888 "2026-09-26T15:49:02Z")
Hi, I wanted to ask if there is a preferred or recommended approach for downloading bulk data. I’ve been tasked to download 46 years of hourly data for 10 variables from the global ERA5 single level 0.25° resolution dat… --- ## [Adm1 mapping table, Global climate and energy indicators from 1950 to present derived from reanalysis](https://forum.ecmwf.int/t/adm1-mapping-table-global-climate-and-energy-indicators-from-1950-to-present-derived-from-reanalysis/15092)
**Author:** [@Freddy\_Martin](https://forum.ecmwf.int/u/Freddy_Martin)\ **Replies:** 2\ **Last updated:** [23 September 2026 06:55 UTC](https://forum.ecmwf.int/t/adm1-mapping-table-global-climate-and-energy-indicators-from-1950-to-present-derived-from-reanalysis/15092 "2026-09-23T06:55:59Z")
Hello, I would really appreciate if someone could help me map the adm1 names to actual regions. When using the following data source: “Global climate and energy indicators from 1950 to present derived from reanalysis” r… --- ## [Information about SEAS6](https://forum.ecmwf.int/t/information-about-seas6/15342)
**Author:** [@Lonneke\_van\_Bijsterveldt](https://forum.ecmwf.int/u/Lonneke_van_Bijsterveldt)\ **Replies:** 0\ **Last updated:** [22 September 2026 13:47 UTC](https://forum.ecmwf.int/t/information-about-seas6/15342 "2026-09-22T13:47:06Z")
Hello, I am trying to find information about SEAS6. I currently use SEAS5 from both MARS and CDS. The only information I have managed to find online is this presentation from 2023: https://climate.copernicus.eu/sites/d… --- ## [Wind rotation question](https://forum.ecmwf.int/t/wind-rotation-question/15203)
**Author:** [@Eva\_Hdez](https://forum.ecmwf.int/u/Eva_Hdez)\ **Replies:** 2\ **Last updated:** [21 September 2026 12:15 UTC](https://forum.ecmwf.int/t/wind-rotation-question/15203 "2026-09-21T12:15:06Z")
We are interested in converting the grid-relative wind components provided in the CARRA dataset into earth-relative (true north/east) wind components, u\_earth and v\_earth. For the CARRA West domain we are using this code… --- ## [How to download daily average temperature data for all available counties in time series from 1990 - 2026?](https://forum.ecmwf.int/t/how-to-download-daily-average-temperature-data-for-all-available-counties-in-time-series-from-1990-2026/15319)
**Author:** [@Abhay\_Singh](https://forum.ecmwf.int/u/Abhay_Singh)\ **Replies:** 1\ **Last updated:** [18 September 2026 18:32 UTC](https://forum.ecmwf.int/t/how-to-download-daily-average-temperature-data-for-all-available-counties-in-time-series-from-1990-2026/15319 "2026-09-18T18:32:23Z")
Hi All, Could anyone please guide me on how can I get a daily average temperature data for all the available countries? --- ## [Land cover classes in C3S-LC-L4-LCCS-Map differ from documentation](https://forum.ecmwf.int/t/land-cover-classes-in-c3s-lc-l4-lccs-map-differ-from-documentation/14878)
**Author:** [@Fabian\_Stenzel](https://forum.ecmwf.int/u/Fabian_Stenzel)\ **Replies:** 5\ **Last updated:** [11 September 2026 06:10 UTC](https://forum.ecmwf.int/t/land-cover-classes-in-c3s-lc-l4-lccs-map-differ-from-documentation/14878 "2026-09-11T06:10:48Z")
Dear all, we appreciate these great resources for our research! We have downloaded and analyzed the C3S-LC-L4-LCCS data from Land cover classification gridded maps from 1992 to present derived from satellite observatio… --- ## [Seasonal forecast products delay](https://forum.ecmwf.int/t/seasonal-forecast-products-delay/13723)
**Author:** [@Hao\_Yin](https://forum.ecmwf.int/u/Hao_Yin)\ **Replies:** 5\ **Last updated:** [4 September 2026 08:29 UTC](https://forum.ecmwf.int/t/seasonal-forecast-products-delay/13723 "2026-09-04T08:29:20Z")
When I downloaded the data from the ECMWF Seasonal Forecast Product website, I noticed that today is already 7 July 2025, and ECMWF SEAS51’s seasonal forecast product for the month of July is available for download, but… --- ## [9 km global daily fire fuel download](https://forum.ecmwf.int/t/9-km-global-daily-fire-fuel-download/15187)
**Author:** [@wang\_ma](https://forum.ecmwf.int/u/wang_ma)\ **Replies:** 1\ **Last updated:** [3 September 2026 12:42 UTC](https://forum.ecmwf.int/t/9-km-global-daily-fire-fuel-download/15187 "2026-09-03T12:42:48Z")
How can I download daily data for 2022-2025? Currently, only monthly data is available. Dataset URL is: Observation and ERA5-Land derived 9 km global daily fire fuel characteristics since 2003 --- ## [Climate dataset for C3S Atlas: SPEI-6 upper/lower bounds?](https://forum.ecmwf.int/t/climate-dataset-for-c3s-atlas-spei-6-upper-lower-bounds/15253)
**Author:** [@Merijn\_van\_den\_Bosch](https://forum.ecmwf.int/u/Merijn_van_den_Bosch)\ **Replies:** 3\ **Last updated:** [28 August 2026 14:41 UTC](https://forum.ecmwf.int/t/climate-dataset-for-c3s-atlas-spei-6-upper-lower-bounds/15253 "2026-08-28T14:41:38Z")
Hello, In working with the C3S Atlas data, I find that across Member models and locations, there are negative and positive values that are exactly -/+ -8.209961. Not only are these very extreme SPEI values, they are als… --- ## ["Global land surface atmospheric variables from 1718..." dataset has incorrect mean temperatures](https://forum.ecmwf.int/t/global-land-surface-atmospheric-variables-from-1718-dataset-has-incorrect-mean-temperatures/15285)
**Author:** [@Andrea\_Alberini](https://forum.ecmwf.int/u/Andrea_Alberini)\ **Replies:** 0\ **Last updated:** [26 August 2026 09:05 UTC](https://forum.ecmwf.int/t/global-land-surface-atmospheric-variables-from-1718-dataset-has-incorrect-mean-temperatures/15285 "2026-08-26T09:05:19Z")
Dataset Global land surface atmospheric variables from 1718 to present from comprehensive in-situ observations contains mean temperature values different from arithmetic mean of max an min temperatures. E.G. index o… --- ## [CDS requests says Running: 1 — Queued: 1, but no job is running](https://forum.ecmwf.int/t/cds-requests-says-running-1-queued-1-but-no-job-is-running/15283)
**Author:** [@Paul\_Bell](https://forum.ecmwf.int/u/Paul_Bell)\ **Replies:** 0\ **Last updated:** [25 August 2026 13:46 UTC](https://forum.ecmwf.int/t/cds-requests-says-running-1-queued-1-but-no-job-is-running/15283 "2026-08-25T13:46:21Z")
Quick query. On the CDS request I have the following Queue status and it is taking a long time to download a single days worth of data: “The maximum number of per-user requests that access the CDS-MARS data is 1” “Runn… --- ## [NUTS2 names in PECD](https://forum.ecmwf.int/t/nuts2-names-in-pecd/15271)
**Author:** [@Raphael\_DALLE](https://forum.ecmwf.int/u/Raphael_DALLE)\ **Replies:** 2\ **Last updated:** [24 August 2026 14:30 UTC](https://forum.ecmwf.int/t/nuts2-names-in-pecd/15271 "2026-08-24T14:30:38Z")
Hi all, I would like to know if a map existed to localize non European NUTS2 zones, from the PECDv4.2. On the PECD documentation, I can only find the map with frontieres, but without the zones names. I am looking for … --- ## [Issue with rotating vector fields from the ORAS5 tripolar grid to a regular lon–lat grid](https://forum.ecmwf.int/t/issue-with-rotating-vector-fields-from-the-oras5-tripolar-grid-to-a-regular-lon-lat-grid/15265)
**Author:** [@YUPEI\_ZHANG](https://forum.ecmwf.int/u/YUPEI_ZHANG)\ **Replies:** 0\ **Last updated:** [19 August 2026 13:00 UTC](https://forum.ecmwf.int/t/issue-with-rotating-vector-fields-from-the-oras5-tripolar-grid-to-a-regular-lon-lat-grid/15265 "2026-08-19T13:00:56Z")
Dear all, I have encountered an issue when working with the vector products provided by ORAS5. According to the ORAS5 overview tab, three groups of vector fields are provided on the ORAS5 model grid: ocean current velo… --- ## [Stratospheric heating trend 1940-1969 from era-5 monthly averaged data](https://forum.ecmwf.int/t/stratospheric-heating-trend-1940-1969-from-era-5-monthly-averaged-data/15084)
**Author:** [@Christos\_Tzagia](https://forum.ecmwf.int/u/Christos_Tzagia)\ **Replies:** 1\ **Last updated:** [14 August 2026 14:14 UTC](https://forum.ecmwf.int/t/stratospheric-heating-trend-1940-1969-from-era-5-monthly-averaged-data/15084 "2026-08-14T14:14:23Z")
Hello , a fellow undergrad here! When i plot the temp trend over the 1940 to 1969 i see a spike of heating in the lower stratosphere. Something between +1.5 to +2K per 30yrs. I’m trying to understand if the data is not t… --- ## [Multi-model ensembles are the standard download now?](https://forum.ecmwf.int/t/multi-model-ensembles-are-the-standard-download-now/15214)
**Author:** [@Merijn\_van\_den\_Bosch](https://forum.ecmwf.int/u/Merijn_van_den_Bosch)\ **Replies:** 4\ **Last updated:** [13 August 2026 14:14 UTC](https://forum.ecmwf.int/t/multi-model-ensembles-are-the-standard-download-now/15214 "2026-08-13T14:14:47Z")
Hello everyone, Let me preface this by saying I am not a climate scientist, but in the past, downloads from the CDS have greatly aided me. I just noticed that when looking at climate projections downloads (e.g. Gridde… --- ## [Missing ERA5 Cyclone Tracks](https://forum.ecmwf.int/t/missing-era5-cyclone-tracks/15212)
**Author:** [@Colin\_Manning](https://forum.ecmwf.int/u/Colin_Manning)\ **Replies:** 2\ **Last updated:** [12 August 2026 13:00 UTC](https://forum.ecmwf.int/t/missing-era5-cyclone-tracks/15212 "2026-08-12T13:00:03Z")
I have been using the cyclone track dataset and have noticed some potential issues. The total number of tracks is lower than a track dataset applied globally using the same algorithm. There are also many tracks missing f… --- ## [How can I convert ERA5 windata from WGS84 to EPSG 28892 coordinate system?](https://forum.ecmwf.int/t/how-can-i-convert-era5-windata-from-wgs84-to-epsg-28892-coordinate-system/15246)
**Author:** [@Syeda\_Arooba\_Shah](https://forum.ecmwf.int/u/Syeda_Arooba_Shah)\ **Replies:** 0\ **Last updated:** [11 August 2026 09:24 UTC](https://forum.ecmwf.int/t/how-can-i-convert-era5-windata-from-wgs84-to-epsg-28892-coordinate-system/15246 "2026-08-11T09:24:06Z")
How can I convert ERA5 windata from WGS84 to EPSG 28892 coordinate system ? --- ## [Waiting for "Complete ERA5 global atmospheric reanalysis" to be downloaded](https://forum.ecmwf.int/t/waiting-for-complete-era5-global-atmospheric-reanalysis-to-be-downloaded/15216)
**Author:** [@Geoffrey\_Weal](https://forum.ecmwf.int/u/Geoffrey_Weal)\ **Replies:** 2\ **Last updated:** [7 August 2026 14:56 UTC](https://forum.ecmwf.int/t/waiting-for-complete-era5-global-atmospheric-reanalysis-to-be-downloaded/15216 "2026-08-07T14:56:08Z")
Hello I am looking to download data from the “Complete ERA5 global atmospheric reanalysis”. While my submission to download data from “Complete ERA5 global atmospheric reanalysis” has been accepted, it is not downloadin… --- ## [CORDEX Downloading - Slower after July update](https://forum.ecmwf.int/t/cordex-downloading-slower-after-july-update/15229)
**Author:** [@Mattia\_Donato](https://forum.ecmwf.int/u/Mattia_Donato)\ **Replies:** 6\ **Last updated:** [6 August 2026 14:24 UTC](https://forum.ecmwf.int/t/cordex-downloading-slower-after-july-update/15229 "2026-08-06T14:24:45Z")
Dear All, I have been downloading CORDEX data via API and it seems very slow recently. Has anyone encountered a similar issue? Thank you --- ## [Severe and persistent queue delays for ERA5 hourly data (pressure levels) via CDS API](https://forum.ecmwf.int/t/severe-and-persistent-queue-delays-for-era5-hourly-data-pressure-levels-via-cds-api/14836)
**Author:** [@er\_tian](https://forum.ecmwf.int/u/er_tian)\ **Replies:** 7\ **Last updated:** [6 August 2026 13:02 UTC](https://forum.ecmwf.int/t/severe-and-persistent-queue-delays-for-era5-hourly-data-pressure-levels-via-cds-api/14836 "2026-08-06T13:02:37Z")
Dear ECMWF/CDS team, I would like to report a persistent issue with extremely long queue times when accessing the dataset: “ERA5 hourly data on pressure levels from 1940 to present” Over the past ~2 weeks, almost all … --- ## [ERA5 versus ERA5-Land: is an 80–100 m altitude difference expected?](https://forum.ecmwf.int/t/era5-versus-era5-land-is-an-80-100-m-altitude-difference-expected/15234)
**Author:** [@Raphael\_Nussbaumer](https://forum.ecmwf.int/u/Raphael_Nussbaumer)\ **Replies:** 0\ **Last updated:** [6 August 2026 09:49 UTC](https://forum.ecmwf.int/t/era5-versus-era5-land-is-an-80-100-m-altitude-difference-expected/15234 "2026-08-06T09:49:12Z")
Hello, I am comparing ERA5 and ERA5-Land surface pressure along a transect to understand the effect of the different model orographies. I downloaded: ERA5 hourly single-level data; ERA5-Land hourly data; ERA5 geopote… --- ## [Energy Indicators - Update Cycle](https://forum.ecmwf.int/t/energy-indicators-update-cycle/15197)
**Author:** [@Luisa\_Mann](https://forum.ecmwf.int/u/Luisa_Mann)\ **Replies:** 0\ **Last updated:** [28 July 2026 09:23 UTC](https://forum.ecmwf.int/t/energy-indicators-update-cycle/15197 "2026-07-28T09:23:05Z")
Hi all, in the new dataset “Global climate and energy indicators from 1950 to present derived from reanalysis”, the energy indicators are currently only available up to April 2026. In the previous dataset, these values … --- ## [About snowfall and snowmelt, how to caculate total monthly snowfall and snowmelt?](https://forum.ecmwf.int/t/about-snowfall-and-snowmelt-how-to-caculate-total-monthly-snowfall-and-snowmelt/1637)
**Author:** [@Dango\_Zhang](https://forum.ecmwf.int/u/Dango_Zhang)\ **Replies:** 4\ **Last updated:** [27 July 2026 11:19 UTC](https://forum.ecmwf.int/t/about-snowfall-and-snowmelt-how-to-caculate-total-monthly-snowfall-and-snowmelt/1637 "2026-07-27T11:19:44Z")
Dear all, I am using Snowfall and Snowmelt of ERA5-Land. First of all, I would like to ask, the document (ERA5-Land: data documentation, ERA5-Land: data documentation-Copernicus Knowledge Base-ECMWF Confluence Wiki) sa… [Next page](https://forum.ecmwf.int/c/datasets-and-usage/c3s-datasets-and-usage/15.md?page=1)