# Frozen datasets for figures in the paper

This directory contains the frozen datasets used to generate Figures 1–5 of
the paper entilted "Comparison of M10 and M20 Meteomodem radiosondes relative humidity measurements with ECMWF ERA5 above France : focus on the upper troposphere"

Each CSV file corresponds to one figure and contains the exact data used in the
final plot. No additional processing is required to reproduce the figures.

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## DATA_Fig1.csv – Vertical RH profiles

Aggregated statistics of relative humidity profiles from ERA5 and radiosonde
observations as a function of pressure level, for the period 2020–2024.

### Main variables
- `pressure_hPa` : pressure level (hPa)
- `time` : launch time (`00` or `12`)
- `source` :
  - `ERA5`
  - `M10_MF` (Meteomodem M10, Météo-France processing)
  - `M10_GRUAN` (Meteomodem M10, GRUAN processing)
- `mean_rh` : mean relative humidity (%)
- `std_rh` : standard deviation of relative humidity (%)
- `n_profiles` : number of profiles used

Used to generate **Figure 1**.

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## DATA_Fig2.csv – RH distribution histograms

Individual relative humidity values used to compare ERA5 and radiosonde
distributions for the period 2020–2024.

### Main variables
- `source` :
  - `ERA5`
  - `M10_MF`
  - `M10_GRUAN`
- `rh` : relative humidity (%)

Used to generate Figure 2.

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## DATA_Fig3.csv – Vertical RH bias statistics (UT)

Precomputed statistics of relative humidity differences (ΔRH = radiosonde - ERA5)
in the upper troposphere for the period 2020–2024.

### Main variables
- `level` : pressure level (hPa)
- `processing` :
  - `MF`
  - `GRUAN`
- `regime` :
  - `low` : RH < 90 %
  - `up`  : RH ≥ 90 %
- `statistic` :
  - `mean`
  - `p5`
  - `p95`
  - `count`
- `value` : numerical value associated with the statistic

Used to generate Figure 3.

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## DATA_Fig4.csv – Vertical boxplots of RH differences between radiosonde processing methods

Boxplots of relative humidity (RH) differences between radiosondes processing methods, for the period 2020–2024, as a function of pressure level.

### Main variables
- `level` : pressure level (hPa)
- `r` : relative humidity difference ΔRH (%)

Used to generate  Figure 4.

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## DATA_Fig5.csv – Median vertical RH bias profiles 

Aggregated statistics of radiosonde–ERA5 RH differences over 2020, 2022, 2023 and 2024.

### Main variables
- `station` : Nîmes or Trappes
- `processing` : `MF` or `GRUAN`
- `time` : `day` or `night`
- `year` : observation year
- `pressure_hPa` : pressure level (hPa)
- `median` : median ΔRH (%)
- `p25` : 25th percentile
- `p75` : 75th percentile

Used to generate Figure 5.
