Missing data: surface solar radiation downwards in reanalysis ERA5 single levels for 2024 July

Datasets and Usage C3S - Datasets and Usage
1

Hi,

I noticed that the surface solar radiation downwards values are NaN for 2024 July in the reanalysis ERA5 single levels dataset. Values exist for June and August though. Is this a known issue?

This was my code for the request:

dataset = "reanalysis-era5-single-levels"
request = {
    'product_type': ['reanalysis'],
    'variable': [
                '2m_temperature',                       # Air temperature at 2m, in K
                '10m_u_component_of_wind',              # u component of wind at 10m, in m/s
                '10m_v_component_of_wind',              # v component of wind at 10m, in m/s
                'low_cloud_cover',                      # area covered by clouds, between 0-1
                'medium_cloud_cover',                   # area covered by clouds, between 0-1 
                'high_cloud_cover',                     # area covered by clouds, between 0-1
                'total_cloud_cover',                    # area covered by clouds, between 0-1
                'precipitation_type',                   # rain, snow etc, between 0-8
                'total_precipitation',                  # accumulated liquid and frozen water, comprising rain and snow, that falls to the Earth's surface, in m
                'surface_solar_radiation_downwards',    # amount of solar radiation that reaches a horizontal plane at the surface of the Earth, in J/m2
                '2m_dewpoint_temperature',              # in K
                'mean_sea_level_pressure',              # in Pa
            ],
    'year': ["2024"],
    'month': ["07"],
    'day': [
                '01', '02', '03',
                '04', '05', '06',
                '07', '08', '09',
                '10', '11', '12',
                '13', '14', '15',
                '16', '17', '18',
                '19', '20', '21',
                '22', '23', '24',
                '25', '26', '27',
                '28', '29', '30',
                '31',
            ],
    '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',
            ],
    'data_format': 'netcdf',
    'download_format': 'unarchived',
    'area': [71, -10, 47, 32]
}

client = cdsapi.Client(url=os.environ["CDS_API_ENDPOINT"], key=os.environ["CDS_API_KEY"])
client.retrieve(dataset, request, "weather_data.nc")

Thanks
Sander

2

I can also confirm that there were missing values for surface solar radiation downwards for July and beginning of August when downloading from the new CDS-Beta API. For the last days in August, data seems to be intact

3

I have the same issue, is there a way to have these datas ? I don’t even have the ssrd and strd variables in my netcdf or grib files.

4

Hi,
if you are asking data in netCDF format, please use different requests for accumulated variables and instantaneous variables.
Moreover, please see this: ERA5 CDS requests which return a mixture of ERA5 and ERA5T data
Thanks