Harmonised boundary layer wind profile dataset from six ground-based doppler wind lidars in a transect across Paris (France) from 2022-06-10 to 2024-03-05
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Morrison, William1, 2
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Looschelders, Dana1
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Cespedes, Jonnathan3
- Claxton, Bernie4
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Drouin, Marc-Antoine3
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Dupont, Jean-Charles3
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Haeffelin, Martial3
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Holst, Christopher C.5
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Kotthaus, Simone6, 3
- McGregor, James4
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Masson, Valéry7
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Price, Jeremy4
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Zeeman, Matthias1
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Grimmond, Sue8
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Christen, Andreas
(Contact person)1
Description
Quality controlled and harmonized dataset on wind direction and wind speed profiles from ground-based Doppler Wind LIDARS (DWL), deployed in a multi-institutional effort along a 40 km transect through the centre of the Paris Metropolitan area (France) for the period 2022-06-10 to 2024-03-05.
The dataset, its derivation, quality control and evaluation against radiosondes and in-situ observations are decribed in the following manuscript:
Morrison, W., Looschelders, D., Céspedes, J., Claxton, B., Drouin, M.-A., Dupont, J.-C., Faucheux, A., Haeffelin, M., Holst, C. C., Kotthaus, S., Masson, V., McGregor, J., Price, J., Zeeman, M., Grimmond, S., and Christen, A.: Harmonised boundary layer wind profile dataset from six ground-based doppler wind lidars in a transect across Paris, France, Earth Syst. Sci. Data, https://doi.org/10.5194/essd-2025-167, 2025.
Preview graphs for the full dataset on a daily basis (wind speed, wind direction, wind barbs) are available here:
https://doi.org/10.5281/zenodo.15090857
Continuous data availability consists of
- Extensive Operation Period (EOP) with 3 DWLs from June 10, 2022 – March 05, 2024
- Two Intensive Observation Periods (IOPs) with six DWL over 9 weeks in September 2023 to December 2023.
Detailed data availability per site along with weather conditions and classifications can be found in the files "paris_dwl_L3VX.XX_data_availability_weather.pdf" and "paris_dwl_L3VX.XX_data_availability_weather.xlsx".
Data are provided in daily NetCDF files in two temporal resolutions of 10 minutes ("_600s") and 1 hour ("_3600s"). All dates / times are in UTC. Files are packaged by year and month using the following name convention "paris_dwl_L3VX.XX_YYYY_MM_RRRRs.tar.gz", where X.XX is the version number, YYYY refers to the year, (2022-2024) MM to the month of the year (01-12), and RRRR is the time resolution with "600s" and "3600s".
NetCDF files contain the following fields:
| standard_name (Variable name) | Dimensions | Description |
| time | 1 | Timestamp: end of time interval. 600 s and 3600 s time intervals are provided, in separate data files (600 s e.g. 00:00:01 → 00:10:00 and 3600 s e.g. 00:00:01 → 01:00:00). All variables are harmonised to this resolution as averages (e.g. wind) or percentage occurrence (e.g. flags) |
| altitude | 1 | Altitude of centre of each measurement gate above mean sea level (m). Harmonised gates are 25 m from 0 – 6500 m with values linearly interpolated to this resolution |
| station | 1 | Measurement location identifier (see table below), all are listed even if no valid data are retrieved during the file’s date. |
| eastward_wind (u) | 3 | Mean eastward wind component (m s-1) using all valid samples within time interval |
| northward_wind (v) | 3 | Mean northward wind component (m s-1) using all valid samples within time interval |
| wind_speed (ws) | 3 | Horizontal wind speed calculated from eastward_wind and northward_wind (m s-1) |
| wind_from_direction (wd) | 3 | Horizontal wind direction calculated from eastward_wind and northward_wind (degrees from true north) |
| system_id | 2 | Serial number of sensor deployed at station at a given time |
| latitude (station_lat) | 1 | Latitude of the measurement station (degrees, decimal, WGS84) |
| longitude (station_lon) | 1 | Longitude of the measurement station (degrees, decimal, WGS84) |
|
station_altitude |
1 |
Measurement station height above ground level (m). Ground level is the “street” level so if the station is on a rooftop, the height will accounts for the building height and any mounting structure |
|
station_height |
1 | Average height of station above sea level (reference_geoid: EGM96) (m) |
|
n_rays_in_scan |
2 |
Number of rays in a scan. e.g. 12 for a VAD scan that has 12 samples within one scan |
|
n_pulses |
2 |
Number of pulses in a given ray. More pulses, the higher the integration time |
|
raw_gate_length |
2 |
Gate length prior to L3 aggregation (m) |
|
flag_suspect_retrieval_warn |
3 |
Percentage of values within time interval with retrieval warning not linked to low signal (flag_low_signal_warn_pc) or out of range (flag_ws_out_of_range_removed_pc). Retrievals retained but treat with caution |
|
flag_suspect_retrieval_removed |
3 |
Percentage of values within time interval with retrieval error not linked to low signal (flag_low_signal_warn_pc) or out of range (flag_ws_out_of_range_removed_pc). Data removed |
|
flag_low_signal_warn |
3 |
Percentage of values within time interval with a low SNR. Retrievals retained but treat with caution |
|
flag_low_signal_removed |
3 |
Percentage of values within time interval with a low SNR. Retrieval rejected |
|
flag_ws_out_of_range_removed |
3 |
Percentage of values within time interval with wind speed outside reasonable retrievable range (> 60 m s-1) (i.e. removed). Evaluated after all other retrieval QC |
Version history
Version 1.42
- Selected additional values at the station PAROIS have been flagged and/or removed due to suspicion of an instrument malfunction. Data have been compared to a co-located SODAR to assess data quality (see manuscript for details)
- Weather data files (paris_dwl_L3V1.42_data_availability_weather.xlsx and paris_dwl_L3V1.42_data_availability_weather.pdf) have been corrected for an error in the column "Precipitation (mm day-1) MF Montsouris Weather Station" (previously incorrect atribution to day), for the correct highlighting of weekend days and they have been expanded to include sunrise, sunset and solar noon times.
- Added the processing code adapted from the halo-reader package (halo-reader-morrison-fork.zip)
- Added the dataset production code (paris-harmonised-dwl-morrison-fork.zip)
Notes
Files
halo-reader-morrison-fork.zip
Files
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Additional details
Funding
- European Commission
- urbisphere - urbisphere - coupling dynamic cities and climate 855005
- European Commission
- CATRINE - Carbon Atmospheric Tracer Research to Improve Numerics and Evaluation 101135000
- European Commission
- ATMO-ACCESS - Solutions for Sustainable Access to Atmospheric Research Facilities 101008004
- European Commission
- PAUL - Pilot Application in Urban Landscapes - Towards integrated city observatories for greenhouse gases 101037319
- UK Research and Innovation
- Atmospheric Measurement and Observation Facility (AMOF) ncas10008
Dates
- Collected
-
2022-06-10/2024-03-05
Software
- Repository URL
- https://github.com/willmorrison1/paris-harmonised-dwl
- Programming language
- Python