Mawson 00Z 300hPa height 1957 - - - 8480.6 8389.5 - 8311.0 8410.0 8185.0 8422.0 8555.0 8639.6 1958 8634.4 8614.7 8553.4 8397.9 8428.6 8375.4 8245.5 8208.3 8171.6 8289.6 8466.3 8444.2 1959 - - - - - - - - - - - - 1960 - - 8375.9 8400.9 8380.0 8216.2 8206.9 8211.2 8151.8 8306.7 8324.1 8489.2 1961 8536.4 8601.2 8388.8 8402.2 8374.1 8401.4 8189.6 8177.5 8404.2 8345.6 8457.2 8417.2 1962 8455.7 8506.5 8388.7 8336.9 8296.3 8474.1 8155.5 8075.7 8227.2 8195.8 8419.6 8503.5 1963 8574.5 8573.0 8393.0 8361.7 8347.9 8357.5 8202.2 8380.0 8384.8 8216.7 8307.8 8588.1 1964 8667.2 8558.6 8432.5 8366.5 8222.4 8375.0 8429.2 8300.0 8092.4 8197.2 8456.8 8601.2 1965 8629.7 8622.7 8424.7 8411.7 8503.8 8299.7 8178.5 8248.8 8151.8 8253.4 8307.1 8615.5 1966 8536.9 8585.2 8550.7 8317.7 8408.6 8258.5 8306.3 8133.6 8210.5 8152.1 8484.1 8577.8 1967 8662.3 8531.8 8437.1 8356.1 8391.7 8334.6 8268.7 8211.5 8232.1 8327.4 8479.0 8546.3 1968 8577.6 8577.1 8492.0 8441.7 8457.1 8312.5 8147.6 8255.0 8117.6 8270.0 8443.1 8582.9 1969 8715.3 8611.9 8422.4 8427.9 8365.9 8431.0 8163.5 8119.3 8180.0 8308.0 8437.7 8586.6 1970 8535.7 8484.8 8547.6 8406.6 8370.0 8305.0 8277.0 8182.1 8194.5 8271.0 8477.3 8588.1 1971 8733.5 8626.7 8470.3 8385.4 8373.2 8178.0 8203.5 8222.9 8249.3 8288.3 8403.3 8658.0 1972 8677.9 8554.6 8474.6 8455.7 8353.8 8333.7 8260.0 8410.8 8378.9 8316.5 8367.5 8645.4 1973 8624.0 8540.4 8394.2 8412.1 8446.8 8385.7 8198.0 8115.0 8292.9 8271.5 8393.0 8476.1 1974 - - - - - - - - - - - - 1975 - - 8468.0 8309.6 8382.7 8347.5 8277.0 8146.8 8152.4 8221.7 8395.7 8576.8 1976 8617.8 8520.7 8433.4 8300.4 8227.2 8253.1 8134.5 8166.4 8124.8 8164.1 8469.7 8703.9 1977 8650.3 8535.4 8418.0 8322.8 8378.9 8392.9 8401.6 8393.0 8162.1 8235.9 8402.3 8491.5 1978 8510.3 8532.9 8446.9 8359.0 8376.6 8222.7 8336.8 8083.2 8228.1 8318.1 8453.8 8541.0 1979 8628.0 8526.8 - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 8611.7 8563.3 8454.0 8385.5 8187.1 8253.6 8210.7 8264.8 8273.1 8276.5 8438.7 8567.2 1990 8641.6 8557.0 8470.3 8487.5 8480.3 8278.5 8522.3 8158.9 8063.3 8360.7 8465.9 8526.6 1991 8501.4 8643.6 8524.3 8326.7 8325.8 8400.4 8382.5 8253.7 8242.8 8220.4 8428.0 8735.0 1992 8583.3 8600.6 8531.5 8481.6 8496.3 8453.0 8261.7 8154.7 8117.0 8261.3 8349.5 - 1993 8668.7 8510.4 8457.6 8349.6 8240.0 8243.8 8202.7 8171.7 8221.2 8263.3 8355.9 8512.7 1994 8536.2 8497.0 8386.9 8412.4 8326.9 8470.8 8320.0 8190.4 8225.9 8267.6 8464.6 8488.6 1995 8552.7 8603.5 8447.3 8439.3 8288.0 8251.0 8376.8 8226.9 8061.2 8317.2 8424.1 8495.4 1996 8588.6 8611.6 8438.4 8404.5 8252.2 8377.2 8329.6 8287.2 8431.9 8270.2 8478.0 8554.4 1997 8603.8 8534.1 8389.3 8423.6 8283.7 8355.6 8148.0 8219.6 8137.3 8255.3 8464.8 8589.9 1998 8564.6 8504.6 8484.7 8265.6 8300.9 8287.5 8255.8 8163.0 8271.2 8257.6 8362.7 8471.0 1999 8600.3 8521.0 8421.7 8259.6 8292.3 8423.0 8180.0 8209.8 8261.4 8147.0 8375.9 8384.0 2000 8480.9 8475.3 8373.7 8417.4 8230.8 8420.9 8253.3 8251.3 8319.1 8210.6 8466.7 8616.1 2001 8595.8 8561.3 8446.7 8316.9 8372.1 8308.3 8319.2 8142.0 8162.3 8238.5 8334.7 8440.0 2002 8540.8 8493.6 8511.0 8437.4 8482.7 8336.9 8329.9 8200.4 8247.3 8453.8 8410.9 8488.5 2003 8653.6 8561.3 8459.2 8341.7 8323.1 8321.9 8235.4 8220.3 8215.9 8229.3 8437.9 8638.5 2004 8582.1 8637.3 8414.9 8371.1 8320.3 8259.6 8119.4 8120.1 8138.8 8307.1 8379.5 8566.6 2005 8560.3 8567.5 8497.7 8325.1 8343.1 8413.6 8300.0 8245.9 8192.4 8274.8 8351.2 8658.4 2006 8588.5 8476.6 8405.5 8374.4 8329.4 8258.7 8089.3 8375.8 8215.0 8254.1 8339.4 8471.7 2007 8585.8 8509.5 8436.5 8471.6 8398.3 8398.4 8395.8 8259.0 8213.1 8331.6 8426.9 8472.4 2008 8504.9 8444.7 8478.9 - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - - - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -