# How to download 10m u/v wind **URL:** \ **Category:** C3S - Access and Login\ **Tags:** cds, c3s\ **Created:** [28 December 2023 03:12 UTC](https://forum.ecmwf.int/t/how-to-download-10m-u-v-wind/1549 "2023-12-28T03:12:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Xiaodan\_Liu](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/x/c67d28/32.png) [@Xiaodan\_Liu](https://forum.ecmwf.int/u/Xiaodan_Liu)\ **Post date:** [28 December 2023 03:12 UTC](https://forum.ecmwf.int/t/how-to-download-10m-u-v-wind/1549/1 "2023-12-28T03:12:28Z")
I want to download 10m u/v wind from 'reanalysis-era5-complete', and I set the aera,codes are below,it runs with some errors #!/usr/bin/env python import cdsapi c = cdsapi.Client() c.retrieve('reanalysis-era5-complete', { # Requests follow MARS syntax # Keywords 'expver' and 'class' can be dropped. They are obsolete # since their values are imposed by 'reanalysis-era5-complete' 'date' : '2022-12-30', # The hyphens can be omitted 'levelist': '1/to/137', # 1 is top level, 137 the lowest model level in ERA5. Use '/' to separate values. 'levtype' : 'ml', 'param' : [ '165', '166', ], # Full information at [https://apps.ecmwf.int/codes/grib/param-db/](https://apps.ecmwf.int/codes/grib/param-db/) # The native representation for temperature is spherical harmonics 130-T，129-H，157-RH 'stream' : 'oper', # Denotes ERA5. Ensemble members are selected by 'enda' 'time' : [ '00:00', '01:00', '02:00', '03:00', '04:00', '05:00', '06:00', '07:00', '08:00', '09:00', '10:00', '11:00', '12:00', '13:00', '14:00', '15:00', '16:00', '17:00', '18:00', '19:00', '20:00', '21:00', '22:00', '23:00', ], # You can drop :00:00 and use MARS short-hand notation, instead of '00/06/12/18' 'type' : 'fc',(here I tried an,but failed either) 'area' : '21/105/4/118', # North, West, South, East. Default: global 'grid' : '0.25/0.25', # Latitude/longitude. Default: spherical harmonics or reduced Gaussian grid 'format' : 'grib', # Output needs to be regular lat-lon, so only works in combination with 'grid'! }, '20221229.grib') # Output file. Adapt as you wish.   And the result is 2023-12-28 09:50:27,233 INFO Request is queued 2023-12-28 11:03:55,690 INFO Request is failed 2023-12-28 11:03:55,690 ERROR Message: the request you have submitted is not valid 2023-12-28 11:03:55,690 ERROR Reason:  Expected 6576, got 0.; Request failed; Some errors reported (last error -1) 2023-12-28 11:03:55,691 ERROR   Traceback (most recent call last): 2023-12-28 11:03:55,691 ERROR     File "/opt/cdstoolbox/cdscompute/cdscompute/cdshandlers/services/handler.py", line 59, in handle\_request 2023-12-28 11:03:55,691 ERROR       result = cached(context.method, proc, context, context.args, context.kwargs) 2023-12-28 11:03:55,692 ERROR     File "/opt/cdstoolbox/cdscompute/cdscompute/caching.py", line 108, in cached 2023-12-28 11:03:55,692 ERROR       result = proc(context, \*context.args, \*\*context.kwargs) 2023-12-28 11:03:55,692 ERROR     File "/opt/cdstoolbox/cdscompute/cdscompute/services.py", line 124, in \_\_call\_\_ 2023-12-28 11:03:55,692 ERROR       return p(\*args, \*\*kwargs) 2023-12-28 11:03:55,692 ERROR     File "/opt/cdstoolbox/cdscompute/cdscompute/services.py", line 60, in \_\_call\_\_ 2023-12-28 11:03:55,692 ERROR       return self.proc(context, \*args, \*\*kwargs) 2023-12-28 11:03:55,692 ERROR     File "/home/cds/cdsservices/services/mars/mars.py", line 53, in external 2023-12-28 11:03:55,692 ERROR       return mars(context, request, \*\*kwargs) 2023-12-28 11:03:55,692 ERROR     File "/home/cds/cdsservices/services/mars/mars.py", line 20, in mars 2023-12-28 11:03:55,692 ERROR       execute\_mars(context, requests, info) 2023-12-28 11:03:55,692 ERROR     File "/home/cds/cdsservices/services/mars/execute\_mars.py", line 20, in execute\_mars 2023-12-28 11:03:55,692 ERROR       exception=MarsException) 2023-12-28 11:03:55,692 ERROR     File "/opt/cdstoolbox/cdscompute/cdscompute/context.py", line 209, in run\_command 2023-12-28 11:03:55,692 ERROR       raise exception(call, proc.returncode, output) 2023-12-28 11:03:55,692 ERROR   home.cds.cdsservices.services.mars.\_\_init\_\_.py.exceptions.MarsException: Expected 6576, got 0.; Request failed; Some errors reported (last error -1) Traceback (most recent call last):   File "F:\test\downloadERA5.py", line 4, in \     c.retrieve('reanalysis-era5-complete', { # Requests follow MARS syntax   File "E:\Anconda\Lib\site-packages\cdsapi\api.py", line 364, in retrieve     result = self.\_api("%s/resources/%s" % (self.url, name), request, "POST")              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^   File "E:\Anconda\Lib\site-packages\cdsapi\api.py", line 519, in \_api     raise Exception( Exception: the request you have submitted is not valid. Expected 6576, got 0.; Request failed; Some errors reported (last error -1). ---
**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\ **Post date:** [28 December 2023 12:11 UTC](https://forum.ecmwf.int/t/how-to-download-10m-u-v-wind/1549/2 "2023-12-28T12:11:00Z")
Hi, the variables available at model levels are available here: [ERA5: data documentation#Table12](https://confluence.ecmwf.int/display/CKB/ERA5%3A+data+documentation#ERA5:datadocumentation-Table12) You can also build the API script for ERA5 model levels data using the catalogue available here: [MARS ERA5 catalogue](http://apps.ecmwf.int/data-catalogues/era5) Thanks ---
**Author:** ![Zhigang\_Song](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/z/53a042/32.png) [@Zhigang\_Song](https://forum.ecmwf.int/u/Zhigang_Song)\ **Post date:** [2 January 2024 10:30 UTC](https://forum.ecmwf.int/t/how-to-download-10m-u-v-wind/1549/3 "2024-01-02T10:30:39Z")
Thanks Michela