Table 3.

Linear regression slopes of FP–MLS v3.3 differences. Slopes are presented with their 95% confidence intervals. Periods 1 and 2 refer to the intervals before and including the changepoint (Table 2) and immediately after the changepoint to 30 June 2015, respectively. Values in boldface type are statistically different from zero with 95% confidence.

MLS		Lindenberg	Boulder	Hilo	San José	Lauder
Pressure	Period	(ppmv year−1)	(ppmv year−1)	(ppmv year−1)	(ppmv year−1)	(ppmv year−1)
26	1	−0.001 ±0.089	0.074± 0.040		−0.054 ±0.066	0.066± 0.051
32	1	0.026 ±0.089	0.089± 0.040		−0.004 ±0.038	0.032± 0.043
38	1	0.073 ±0.071	0.057± 0.032		0.003 ±0.048	0.027± 0.040
46	1	0.044 ±0.061	0.038± 0.031		−0.047 ±0.046	0.019± 0.037
56	1	0.014 ±0.053	0.021± 0.030		−0.033 ±0.032	0.020± 0.036
68	1	0.024 ±0.060	0.014± 0.027		−0.036 ±0.029	0.014± 0.035
83	1	0.026 ±0.056	0.039± 0.027		−0.065 ±0.027	−0.024± 0.030
100	1	0.022 ±0.058	0.089± 0.031		−0.053 ±0.046	−0.013± 0.028
26	2	−0.058 ±0.053	−0.054± 0.029	−0.028 ±0.060	−0.009 ±0.036	−0.055± 0.062
32	2	−0.079 ±0.048	−0.065± 0.027	−0.036 ±0.055	−0.053 ±0.051	−0.029± 0.059
38	2	−0.077 ±0.045	−0.070± 0.028	−0.019 ±0.055	−0.033 ±0.031	−0.050± 0.050
46	2	−0.057 ±0.045	−0.065± 0.028	0.001 ±0.052	0.002 ±0.026	−0.058± 0.045
56	2	−0.080 ±0.049	−0.054± 0.025	−0.018 ±0.053	0.007 ±0.035	−0.069± 0.045
68	2	−0.081 ±0.038	−0.056± 0.024	−0.030 ±0.053	0.011 ±0.042	−0.051± 0.039
83	2	−0.054 ±0.038	−0.065± 0.023	−0.020 ±0.049	0.059 ±0.036	−0.036± 0.042
100	2	−0.027 ±0.044	−0.066± 0.024	0.023 ±0.052	0.041 ±0.031	−0.058± 0.047