Forecast of Sea Surface Acidification in the Northwestern Mediterranean Sea

Table 1

Initial pH data, interpolated pH, ΔpH, Δ_range, and minimum and maximum observed pH, from 1995 to 2011. The difference between data and adapted values for interpolation is given by ΔpH=pH_data−pH_interpolated. Consider that Δ_range=maximun−minimum show monthly pH range observed from 1995 to 2011.

Month	Mean measured pH data	Modified pH	ΔpH	Δrange	Observed pH from 1995 to 2011
					Minimum	Maximum
January	8.1027	8.1124	+0.0097	0.0581	8.0756	8.1337
February	8.1062	8.1107	+0.0045	0.1202	8.0686	8.1888
March	8.1081	8.1081	0.00	0.1506	8.0599	8.2106
April	8.1052	8.1052	0.00	0.0760	8.1094	8.1854
May	8.0954	8.0954	0.00	0.1406	8.0455	8.1861
June	8.0775	8.0775	0.00	0.1772	8.0033	8.1805
July	8.0516	8.0516	0.00	0.2423	7.9624	8.2047
August	8.0610	8.0610	0.00	0.1250	7.9981	8.1231
September	8.0989	8.0959	−0.003	0.0928	8.0197	8.1125
October	8.1035	8.1085	+0.005	0.0767	8.0859	8.1627
November	8.1079	8.1119	+0.004	0.0000	8.1166	8.1166
December	8.1134	8.1134	0.00	0.1185	8.0796	8.1982