Table 5.

Linear regression slopes of FP–MLS v4.2 differences. Slopes are presented with their 95% confidence intervals. Periods 1 and 2 refer to the intervals before and including the changepoint (Table 4) 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	0.007 ±0.089	0.077± 0.041		−0.054 ±0.065	0.053± 0.047
32	1	0.026 ±0.082	0.081± 0.040		−0.015 ±0.038	0.026± 0.043
38	1	0.076 ±0.071	0.052± 0.029		0.009 ±0.034	0.033± 0.040
46	1	0.046 ±0.061	0.038± 0.030		−0.013 ±0.039	0.011± 0.038
56	1	0.023 ±0.059	0.022± 0.030		−0.026 ±0.033	0.017± 0.035
68	1	0.032 ±0.059	0.018± 0.027		−0.019 ±0.031	0.005± 0.029
83	1	0.030 ±0.058	0.029± 0.024		−0.028 ±0.025	−0.017± 0.030
100	1	0.064 ±0.066	0.079± 0.030		−0.037 ±0.047	−0.023± 0.030
26	2	−0.062 ±0.053	−0.056± 0.030	−0.015 ±0.070	−0.011 ±0.035	−0.044± 0.063
32	2	−0.079 ±0.051	−0.064± 0.027	−0.032 ±0.057	−0.029 ±0.051	−0.024± 0.060
38	2	−0.071 ±0.045	−0.082± 0.031	−0.014 ±0.055	−0.055 ±0.047	−0.059± 0.050
46	2	−0.054 ±0.046	−0.063± 0.029	−0.005 ±0.052	−0.007 ±0.031	−0.060± 0.045
56	2	−0.065 ±0.044	−0.055± 0.026	−0.030 ±0.055	−0.002 ±0.036	−0.075± 0.043
68	2	−0.079 ±0.039	−0.054± 0.024	−0.038 ±0.053	−0.013 ±0.042	−0.064± 0.047
83	2	−0.058 ±0.038	−0.083± 0.028	−0.059 ±0.052	0.043 ±0.041	−0.025± 0.045
100	2	−0.037 ±0.039	−0.077± 0.023	−0.001 ±0.050	0.022 ±0.031	−0.064± 0.041