Investigating the drivers of long-term trends in the upper atmosphere over Rome across four decades | Journal of Space Weather and Space Climate

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Table 3

Coefficients of the second-degree polynomial fit for the investigated quantities. The second-degree polynomial fit is given in the form $y_{0} + α x_{1} + β x_{2} + γ (x_{1} x_{2}) + δ x_{1}^{2} + ε x_{2}^{2}$ ${y}_0+\alpha {x}_1+\beta {x}_2+\gamma \left({x}_1{x}_2\right)+\delta {x}_1^2+\epsilon {x}_2^2$ , in which $x_{1} = {F 10.7}_{trend}$ ${x}_1={F10.7}_{\mathrm{trend}}$ and $x_{2} = {Ap}_{trend}$ ${x}_2={{Ap}}_{\mathrm{trend}}$ . The quantity in parentheses represents their standard error.

Quantity	y ₀	α	β	γ	δ	ε
foF1	−2.90 (0.09)	−0.023 (0.003)	1.75 (0.02)	0.0090 (0.0007)	−0.00013 (0.00004)	−0.1566 (0.004)
foF2	0.20 (0.12)	0.128 (0.004)	−0.65 (0.03)	−0.0179 (0.0001)	0.00013 (0.00005)	0.183 (0.005)
[O]	−6.9e+08 (4.1e+08)	6.3e+07 (1.3e+07)	−6.3e+08 (1.1e+08)	1.7e+07 (0.3e+07)	−9.2e+05 (2.0e+05)	−7.5e+07 (1.7e+07)
[O]/[N ₂ ]	6.77 (0.06)	−0.032 (0.002)	−0.13 (0.02)	0.0018 (0.0005)	4.8e–05 (3.0e–05)	−0.0064 (0.0026)
ρ	−8.1e–14 (0.2e–14)	2.9e–16 (0.7e–17)	1.61e–14 (0.06e–14)	8.1e–17 (1.9e–17)	−3.0e–18 (1.1e–18)	−1.49e–15 (0.01e–17)
T _ex	−603 (32)	5.4 (1.1)	245 (9)	1.1 (0.3)	−0.046 (0.016)	−22 (1)

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