Table 6 Statistical characteristics of oxygen concentration on the Qinghai-Tibet Plateau.
From: Surface oxygen concentration on the Qinghai-Tibet Plateau (2017–2022)
Season | Year | Number of samples | Average | Standard deviation | Difference from 20.946% | |
|---|---|---|---|---|---|---|
Significance | 95% confidence interval | |||||
Summer | 2017 | 65 | 20.72 | 0.26 | 0.001 | 20.65–20.78 |
2018 | 80 | 20.19 | 0.16 | 0.001 | 20.15–20.22 | |
2019 | 113 | 20.37 | 0.16 | 0.001 | 20.34–20.40 | |
2020 | 176 | 20.30 | 0.18 | 0.001 | 20.28–20.33 | |
2021 | 95 | 20.20 | 0.10 | 0.001 | 20.18–20.22 | |
2022 | 186 | 20.38 | 0.31 | 0.001 | 20.34–20.43 | |
Winter | 2019 | 53 | 20.16 | 0.11 | 0.001 | 20.13–20.19 |
2021 | 39 | 20.01 | 0.12 | 0.001 | 19.97–20.05 | |
