Unified database of ozonesounding profiles
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1.
University of Salerno
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2.
National Research Council
Description
The unified database of ozonesounding profiles was obtained through the merging of three existing ozonesounding datasets, provided by the Southern Hemisphere Additional OZonesondes (SHADOZ), the Network for the Detection of Atmospheric Composition Change (NDACC), and the World Ozone and Ultraviolet Radiation Data Centre (WOUDC). Only a few variables of interest, shown in the Table, were considered to build the unified dataset due to the different formats and amounts of data and metadata provided by each network, despite data often referring to the measurements provided to different initiatives.
|
Standard name |
Description |
Unit |
|
idstation |
The name of the station. |
N.A. |
|
lat |
Latitude of station. |
deg |
|
lon |
Longitude of station. |
deg |
|
date_of_observation |
Date when the ozonesonde was launched (in format yyyy-mm-dd hh:mm:ss with time zone). |
N.A. |
|
press |
Atmospheric pressure of each level in Pascals. |
Pa |
|
temp |
Air temperature in degrees Kelvin. |
K |
|
rh |
Relative humidity in 1. |
1 |
|
gps_lat |
Observation latitude (during the flight). |
deg |
|
gps_lon |
Observation longitude (during the flight). |
deg |
|
gps_alt |
Height of sensor above local ground or sea surface. Positive values for above surface (e.g., sondes), negative for below (e.g., xbt). For visual observations, the height of the visual observing platform. |
m (a. s. l.) |
|
o3_partial_pressure |
The level partial pressure of ozone in Pascals. |
Pa |
|
o3_concentration |
The level mixing ratio of ozone in ppmv. |
ppmv |
|
o3_partial_pressure_total_uncertainty |
Total uncertainty in the calculation of the ozone partial pressure as a composite of the individual uncertainty contribution. Uncertainties due to systematic bias are assumed as random and follow a random normal distribution. The uncertainty calculation also accounts for the increased uncertainty incurred by homogenizing the data record. |
Pa |
|
network |
Source network of the profile. |
N.A. |
|
type |
Station classification flag. |
N.A. |
Furthermore, an algorithm was implemented able to merge the different datasets by handling their different features and duplicated profiles. The selection criteria are summarized below:
- In case of a single profile for a day (no duplicates), this profile will be saved in the database;
- In case of duplicates, the profile selection is driven by the dataset maturity and by the availability of measurement uncertainties on the ozone concentration profiles. The uncertainties are provided mainly in the SHADOZ database and for some locations also in the NDACC database. WOUDC, on the other hand, does not provide any uncertainty estimates;
- Discarded profiles are eventually used to densify the vertical sampling if they provide measurements at different pressure levels not available in the selected profiles.
Files
ozone_unified.zip
Files
(1.8 GB)
| Name | Size | Download all |
|---|---|---|
|
md5:c818095e66f07a089b8a20fbb44cd8ea
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1.8 GB | Preview Download |
Additional details
Dates
- Created
-
2024