#Global pH Anomaly (last update: 2023/11/30) #Anomaly: Deviation from the 1991-2020 mean #S.D. : Standard Deviation #Year, Month, Anomaly, S.D. 1990, 1, 0.028, 0.010 1990, 2, 0.028, 0.011 1990, 3, 0.028, 0.011 1990, 4, 0.028, 0.012 1990, 5, 0.029, 0.010 1990, 6, 0.029, 0.009 1990, 7, 0.029, 0.009 1990, 8, 0.029, 0.009 1990, 9, 0.029, 0.009 1990, 10, 0.028, 0.008 1990, 11, 0.028, 0.008 1990, 12, 0.028, 0.009 1991, 1, 0.026, 0.010 1991, 2, 0.026, 0.010 1991, 3, 0.027, 0.011 1991, 4, 0.026, 0.010 1991, 5, 0.027, 0.009 1991, 6, 0.027, 0.009 1991, 7, 0.027, 0.008 1991, 8, 0.027, 0.009 1991, 9, 0.027, 0.009 1991, 10, 0.027, 0.008 1991, 11, 0.027, 0.008 1991, 12, 0.027, 0.009 1992, 1, 0.025, 0.010 1992, 2, 0.025, 0.011 1992, 3, 0.025, 0.011 1992, 4, 0.025, 0.010 1992, 5, 0.025, 0.010 1992, 6, 0.026, 0.009 1992, 7, 0.026, 0.008 1992, 8, 0.026, 0.009 1992, 9, 0.026, 0.009 1992, 10, 0.025, 0.008 1992, 11, 0.025, 0.008 1992, 12, 0.025, 0.008 1993, 1, 0.023, 0.010 1993, 2, 0.023, 0.010 1993, 3, 0.024, 0.010 1993, 4, 0.023, 0.010 1993, 5, 0.023, 0.009 1993, 6, 0.024, 0.008 1993, 7, 0.025, 0.008 1993, 8, 0.025, 0.009 1993, 9, 0.024, 0.009 1993, 10, 0.024, 0.009 1993, 11, 0.024, 0.008 1993, 12, 0.024, 0.009 1994, 1, 0.021, 0.009 1994, 2, 0.022, 0.009 1994, 3, 0.022, 0.009 1994, 4, 0.021, 0.008 1994, 5, 0.022, 0.008 1994, 6, 0.022, 0.007 1994, 7, 0.022, 0.007 1994, 8, 0.022, 0.008 1994, 9, 0.022, 0.008 1994, 10, 0.022, 0.007 1994, 11, 0.022, 0.007 1994, 12, 0.022, 0.008 1995, 1, 0.020, 0.008 1995, 2, 0.020, 0.009 1995, 3, 0.019, 0.009 1995, 4, 0.019, 0.009 1995, 5, 0.020, 0.009 1995, 6, 0.020, 0.008 1995, 7, 0.020, 0.007 1995, 8, 0.021, 0.008 1995, 9, 0.021, 0.008 1995, 10, 0.020, 0.007 1995, 11, 0.019, 0.007 1995, 12, 0.020, 0.008 1996, 1, 0.018, 0.008 1996, 2, 0.018, 0.008 1996, 3, 0.018, 0.008 1996, 4, 0.018, 0.008 1996, 5, 0.018, 0.008 1996, 6, 0.018, 0.008 1996, 7, 0.018, 0.007 1996, 8, 0.018, 0.008 1996, 9, 0.018, 0.008 1996, 10, 0.018, 0.007 1996, 11, 0.018, 0.007 1996, 12, 0.018, 0.008 1997, 1, 0.016, 0.008 1997, 2, 0.017, 0.009 1997, 3, 0.016, 0.008 1997, 4, 0.017, 0.009 1997, 5, 0.017, 0.008 1997, 6, 0.017, 0.008 1997, 7, 0.018, 0.009 1997, 8, 0.017, 0.009 1997, 9, 0.018, 0.011 1997, 10, 0.017, 0.010 1997, 11, 0.017, 0.010 1997, 12, 0.017, 0.011 1998, 1, 0.015, 0.014 1998, 2, 0.014, 0.014 1998, 3, 0.014, 0.013 1998, 4, 0.015, 0.013 1998, 5, 0.015, 0.011 1998, 6, 0.014, 0.009 1998, 7, 0.014, 0.008 1998, 8, 0.014, 0.009 1998, 9, 0.014, 0.008 1998, 10, 0.014, 0.008 1998, 11, 0.013, 0.008 1998, 12, 0.014, 0.009 1999, 1, 0.012, 0.011 1999, 2, 0.012, 0.012 1999, 3, 0.012, 0.010 1999, 4, 0.011, 0.009 1999, 5, 0.012, 0.009 1999, 6, 0.012, 0.009 1999, 7, 0.012, 0.008 1999, 8, 0.012, 0.008 1999, 9, 0.012, 0.008 1999, 10, 0.012, 0.008 1999, 11, 0.012, 0.008 1999, 12, 0.012, 0.009 2000, 1, 0.010, 0.011 2000, 2, 0.010, 0.011 2000, 3, 0.010, 0.011 2000, 4, 0.010, 0.010 2000, 5, 0.010, 0.009 2000, 6, 0.010, 0.008 2000, 7, 0.010, 0.008 2000, 8, 0.010, 0.008 2000, 9, 0.010, 0.008 2000, 10, 0.010, 0.007 2000, 11, 0.009, 0.008 2000, 12, 0.009, 0.009 2001, 1, 0.007, 0.010 2001, 2, 0.007, 0.010 2001, 3, 0.008, 0.010 2001, 4, 0.008, 0.008 2001, 5, 0.008, 0.009 2001, 6, 0.008, 0.008 2001, 7, 0.008, 0.007 2001, 8, 0.008, 0.007 2001, 9, 0.008, 0.007 2001, 10, 0.009, 0.007 2001, 11, 0.008, 0.007 2001, 12, 0.008, 0.008 2002, 1, 0.006, 0.011 2002, 2, 0.006, 0.010 2002, 3, 0.006, 0.009 2002, 4, 0.007, 0.009 2002, 5, 0.007, 0.009 2002, 6, 0.006, 0.008 2002, 7, 0.007, 0.007 2002, 8, 0.007, 0.008 2002, 9, 0.007, 0.007 2002, 10, 0.007, 0.008 2002, 11, 0.007, 0.008 2002, 12, 0.007, 0.009 2003, 1, 0.005, 0.011 2003, 2, 0.006, 0.012 2003, 3, 0.005, 0.010 2003, 4, 0.005, 0.009 2003, 5, 0.005, 0.009 2003, 6, 0.005, 0.008 2003, 7, 0.005, 0.008 2003, 8, 0.005, 0.007 2003, 9, 0.005, 0.007 2003, 10, 0.005, 0.008 2003, 11, 0.005, 0.008 2003, 12, 0.005, 0.009 2004, 1, 0.003, 0.011 2004, 2, 0.003, 0.011 2004, 3, 0.003, 0.009 2004, 4, 0.003, 0.009 2004, 5, 0.003, 0.009 2004, 6, 0.003, 0.007 2004, 7, 0.003, 0.007 2004, 8, 0.003, 0.007 2004, 9, 0.003, 0.007 2004, 10, 0.003, 0.007 2004, 11, 0.003, 0.007 2004, 12, 0.003, 0.009 2005, 1, 0.001, 0.010 2005, 2, 0.001, 0.011 2005, 3, 0.001, 0.010 2005, 4, 0.001, 0.007 2005, 5, 0.001, 0.009 2005, 6, 0.001, 0.008 2005, 7, 0.001, 0.006 2005, 8, 0.001, 0.007 2005, 9, 0.001, 0.006 2005, 10, 0.000, 0.007 2005, 11, 0.001, 0.007 2005, 12, 0.001, 0.009 2006, 1, -0.001, 0.013 2006, 2, -0.001, 0.011 2006, 3, -0.001, 0.009 2006, 4, -0.001, 0.009 2006, 5, -0.001, 0.008 2006, 6, -0.001, 0.008 2006, 7, -0.001, 0.007 2006, 8, -0.001, 0.007 2006, 9, -0.001, 0.007 2006, 10, -0.001, 0.007 2006, 11, -0.000, 0.007 2006, 12, -0.000, 0.009 2007, 1, -0.003, 0.010 2007, 2, -0.003, 0.010 2007, 3, -0.003, 0.009 2007, 4, -0.003, 0.008 2007, 5, -0.003, 0.008 2007, 6, -0.002, 0.008 2007, 7, -0.003, 0.008 2007, 8, -0.003, 0.007 2007, 9, -0.003, 0.007 2007, 10, -0.003, 0.008 2007, 11, -0.003, 0.008 2007, 12, -0.003, 0.008 2008, 1, -0.006, 0.010 2008, 2, -0.006, 0.011 2008, 3, -0.005, 0.010 2008, 4, -0.005, 0.009 2008, 5, -0.004, 0.010 2008, 6, -0.005, 0.009 2008, 7, -0.005, 0.008 2008, 8, -0.005, 0.009 2008, 9, -0.005, 0.008 2008, 10, -0.005, 0.007 2008, 11, -0.005, 0.008 2008, 12, -0.006, 0.009 2009, 1, -0.007, 0.011 2009, 2, -0.006, 0.011 2009, 3, -0.006, 0.011 2009, 4, -0.007, 0.009 2009, 5, -0.007, 0.010 2009, 6, -0.007, 0.009 2009, 7, -0.007, 0.008 2009, 8, -0.007, 0.007 2009, 9, -0.007, 0.007 2009, 10, -0.007, 0.008 2009, 11, -0.006, 0.008 2009, 12, -0.006, 0.010 2010, 1, -0.007, 0.013 2010, 2, -0.008, 0.012 2010, 3, -0.008, 0.011 2010, 4, -0.008, 0.009 2010, 5, -0.009, 0.009 2010, 6, -0.009, 0.008 2010, 7, -0.009, 0.007 2010, 8, -0.009, 0.008 2010, 9, -0.010, 0.008 2010, 10, -0.009, 0.009 2010, 11, -0.009, 0.009 2010, 12, -0.009, 0.010 2011, 1, -0.010, 0.014 2011, 2, -0.010, 0.013 2011, 3, -0.010, 0.012 2011, 4, -0.010, 0.011 2011, 5, -0.011, 0.010 2011, 6, -0.011, 0.009 2011, 7, -0.011, 0.008 2011, 8, -0.011, 0.008 2011, 9, -0.011, 0.008 2011, 10, -0.010, 0.009 2011, 11, -0.010, 0.009 2011, 12, -0.010, 0.009 2012, 1, -0.012, 0.012 2012, 2, -0.012, 0.013 2012, 3, -0.012, 0.012 2012, 4, -0.012, 0.010 2012, 5, -0.013, 0.010 2012, 6, -0.012, 0.009 2012, 7, -0.013, 0.008 2012, 8, -0.013, 0.009 2012, 9, -0.013, 0.009 2012, 10, -0.012, 0.008 2012, 11, -0.012, 0.008 2012, 12, -0.013, 0.009 2013, 1, -0.014, 0.010 2013, 2, -0.015, 0.010 2013, 3, -0.014, 0.010 2013, 4, -0.015, 0.010 2013, 5, -0.015, 0.009 2013, 6, -0.014, 0.009 2013, 7, -0.015, 0.008 2013, 8, -0.015, 0.008 2013, 9, -0.015, 0.007 2013, 10, -0.014, 0.008 2013, 11, -0.014, 0.008 2013, 12, -0.014, 0.008 2014, 1, -0.016, 0.010 2014, 2, -0.016, 0.010 2014, 3, -0.016, 0.011 2014, 4, -0.016, 0.009 2014, 5, -0.016, 0.009 2014, 6, -0.016, 0.008 2014, 7, -0.016, 0.008 2014, 8, -0.016, 0.008 2014, 9, -0.016, 0.007 2014, 10, -0.016, 0.008 2014, 11, -0.015, 0.008 2014, 12, -0.016, 0.009 2015, 1, -0.018, 0.011 2015, 2, -0.017, 0.011 2015, 3, -0.017, 0.011 2015, 4, -0.017, 0.010 2015, 5, -0.018, 0.011 2015, 6, -0.018, 0.009 2015, 7, -0.017, 0.009 2015, 8, -0.017, 0.010 2015, 9, -0.017, 0.010 2015, 10, -0.017, 0.009 2015, 11, -0.017, 0.010 2015, 12, -0.017, 0.011 2016, 1, -0.019, 0.014 2016, 2, -0.018, 0.015 2016, 3, -0.020, 0.013 2016, 4, -0.020, 0.010 2016, 5, -0.020, 0.010 2016, 6, -0.020, 0.009 2016, 7, -0.020, 0.009 2016, 8, -0.020, 0.009 2016, 9, -0.020, 0.009 2016, 10, -0.019, 0.009 2016, 11, -0.019, 0.010 2016, 12, -0.020, 0.011 2017, 1, -0.022, 0.012 2017, 2, -0.022, 0.011 2017, 3, -0.022, 0.010 2017, 4, -0.022, 0.010 2017, 5, -0.022, 0.009 2017, 6, -0.022, 0.008 2017, 7, -0.022, 0.007 2017, 8, -0.022, 0.008 2017, 9, -0.022, 0.008 2017, 10, -0.022, 0.007 2017, 11, -0.022, 0.008 2017, 12, -0.022, 0.010 2018, 1, -0.024, 0.011 2018, 2, -0.023, 0.011 2018, 3, -0.023, 0.011 2018, 4, -0.023, 0.011 2018, 5, -0.024, 0.011 2018, 6, -0.023, 0.009 2018, 7, -0.024, 0.008 2018, 8, -0.024, 0.008 2018, 9, -0.024, 0.009 2018, 10, -0.024, 0.009 2018, 11, -0.023, 0.009 2018, 12, -0.023, 0.010 2019, 1, -0.025, 0.011 2019, 2, -0.025, 0.012 2019, 3, -0.025, 0.011 2019, 4, -0.025, 0.010 2019, 5, -0.025, 0.010 2019, 6, -0.025, 0.009 2019, 7, -0.026, 0.009 2019, 8, -0.026, 0.009 2019, 9, -0.026, 0.010 2019, 10, -0.026, 0.009 2019, 11, -0.025, 0.010 2019, 12, -0.025, 0.011 2020, 1, -0.026, 0.013 2020, 2, -0.026, 0.014 2020, 3, -0.027, 0.012 2020, 4, -0.027, 0.011 2020, 5, -0.028, 0.010 2020, 6, -0.027, 0.010 2020, 7, -0.028, 0.009 2020, 8, -0.029, 0.009 2020, 9, -0.029, 0.009 2020, 10, -0.028, 0.009 2020, 11, -0.027, 0.009 2020, 12, -0.027, 0.011 2021, 1, -0.029, 0.015 2021, 2, -0.029, 0.016 2021, 3, -0.028, 0.015 2021, 4, -0.028, 0.011 2021, 5, -0.029, 0.012 2021, 6, -0.029, 0.011 2021, 7, -0.029, 0.009 2021, 8, -0.030, 0.009 2021, 9, -0.030, 0.009 2021, 10, -0.029, 0.010 2021, 11, -0.029, 0.011 2021, 12, -0.029, 0.012 2022, 1, -0.032, 0.014 2022, 2, -0.031, 0.015 2022, 3, -0.032, 0.014 2022, 4, -0.031, 0.012 2022, 5, -0.031, 0.011 2022, 6, -0.032, 0.011 2022, 7, -0.033, 0.010 2022, 8, -0.033, 0.011 2022, 9, -0.033, 0.011 2022, 10, -0.031, 0.011 2022, 11, -0.032, 0.010 2022, 12, -0.031, 0.012