4 year mon LTER sea-ice extent(km2) LTER sea-ice area(km2) (Note: data are from the GSFC Bootstrap SMMR-SSMI time-series, i.e. the intercalibrated, corrected data) 1978 1 -999.0 -999.0 1978 2 -999.0 -999.0 1978 3 -999.0 -999.0 1978 4 -999.0 -999.0 1978 5 -999.0 -999.0 1978 6 -999.0 -999.0 1978 7 -999.0 -999.0 1978 8 -999.0 -999.0 1978 9 -999.0 -999.0 1978 10 163551.6 128076.6 1978 11 153427.0 120917.3 1978 12 136007.0 99610.2 1979 1 97747.4 60383.8 1979 2 80109.1 39051.0 1979 3 48950.8 21504.4 1979 4 54512.2 21980.8 1979 5 131238.0 72255.1 1979 6 162370.5 120487.5 1979 7 198012.8 150114.2 1979 8 199190.3 156266.6 1979 9 198012.8 159509.8 1979 10 189736.9 140061.7 1979 11 145610.1 113568.6 1979 12 123300.6 80493.0 1980 1 89197.9 49811.8 1980 2 55042.0 24696.3 1980 3 53350.3 22070.8 1980 4 102858.3 49945.7 1980 5 143186.0 91498.3 1980 6 199190.3 137029.7 1980 7 199190.3 171642.9 1980 8 199190.3 172818.1 1980 9 199190.3 178010.8 1980 10 199190.3 172258.1 1980 11 192691.8 137192.1 1980 12 166531.4 89637.5 1981 1 84893.0 41087.7 1981 2 52609.9 21023.8 1981 3 22648.6 7501.5 1981 4 54033.9 16337.9 1981 5 125785.5 71500.3 1981 6 178452.8 124839.5 1981 7 199190.3 138320.8 1981 8 199190.3 156583.4 1981 9 199190.3 158212.6 1981 10 199190.3 154325.7 1981 11 156411.5 103445.0 1981 12 110470.0 64528.5 1982 1 67767.8 31244.5 1982 2 43384.5 14904.7 1982 3 28067.5 8672.1 1982 4 29445.0 9982.7 1982 5 68041.7 28403.8 1982 6 111325.4 65281.5 1982 7 187312.8 129593.9 1982 8 199190.3 161302.6 1982 9 199190.3 157340.3 1982 10 193234.4 143802.1 1982 11 186679.9 125340.2 1982 12 123142.7 61876.9 1983 1 45770.4 15923.3 1983 2 26265.9 7979.1 1983 3 22690.7 6727.2 1983 4 22656.2 6802.5 1983 5 22008.4 6442.7 1983 6 96093.4 39072.6 1983 7 126139.2 70894.2 1983 8 175405.4 93141.2 1983 9 165353.5 100814.9 1983 10 163571.1 99922.4 1983 11 69656.1 33907.6 1983 12 46310.5 17895.0 1984 1 30463.1 9644.6 1984 2 24406.5 7453.7 1984 3 11556.6 2829.3 1984 4 17711.1 4265.5 1984 5 38642.3 13387.0 1984 6 133615.1 82664.7 1984 7 183106.7 134011.7 1984 8 199190.3 153491.2 1984 9 108181.7 61883.4 1984 10 137245.5 94697.5 1984 11 97806.3 57204.9 1984 12 66583.7 26460.5 1985 1 32226.1 9817.2 1985 2 15248.9 4373.9 1985 3 4253.3 947.9 1985 4 4918.2 996.8 1985 5 20250.0 5442.2 1985 6 84496.8 40422.6 1985 7 155175.8 98316.0 1985 8 178373.4 120029.0 1985 9 170081.6 102926.9 1985 10 127005.7 83330.0 1985 11 86885.2 56271.7 1985 12 74636.7 43860.7 1986 1 54411.5 24028.8 1986 2 23242.4 7965.9 1986 3 11652.0 3388.8 1986 4 13515.1 4111.9 1986 5 93915.5 31754.6 1986 6 155646.5 87911.1 1986 7 199190.3 137141.1 1986 8 199190.3 167139.2 1986 9 199190.3 167139.6 1986 10 199190.3 168403.8 1986 11 196211.7 153698.6 1986 12 189075.2 123172.0 1987 1 118428.6 65129.4 1987 2 72206.1 31585.4 1987 3 31909.5 11892.3 1987 4 80397.2 39098.5 1987 5 115389.3 58938.7 1987 6 197421.8 122634.0 1987 7 199190.3 177761.9 1987 8 199190.3 175173.9 1987 9 199190.3 160796.2 1987 10 193226.2 145425.9 1987 11 114130.4 80402.0 1987 12 91022.2 64959.7 1988 1 37312.6 19910.9 1988 2 30534.8 12935.1 1988 3 18340.8 6889.4 1988 4 22098.0 8008.2 1988 5 49108.0 16746.7 1988 6 96501.5 41541.4 1988 7 137677.0 86020.8 1988 8 199190.3 138243.2 1988 9 199190.3 147447.6 1988 10 135403.8 88200.7 1988 11 67337.7 32527.7 1988 12 29851.8 9914.1 1989 1 9041.8 3167.1 1989 2 7842.9 2890.5 1989 3 7843.4 2824.2 1989 4 3031.7 961.8 1989 5 7278.7 1721.1 1989 6 71805.1 31056.7 1989 7 88864.8 47821.3 1989 8 101012.0 49494.5 1989 9 127015.3 71604.6 1989 10 55815.7 22167.9 1989 11 19580.5 7095.6 1989 12 10945.1 3728.3 1990 1 7842.9 2770.5 1990 2 7842.9 2909.2 1990 3 7243.7 2474.7 1990 4 3022.2 791.3 1990 5 15828.7 4643.6 1990 6 78206.0 27798.3 1990 7 118264.0 70356.5 1990 8 181968.0 114878.3 1990 9 194420.0 150676.9 1990 10 171299.2 137873.2 1990 11 155808.0 125344.0 1990 12 131196.6 70772.2 1991 1 10861.6 3549.9 1991 2 7243.7 2710.6 1991 3 6031.0 1646.0 1991 4 4224.0 1273.1 1991 5 90533.0 31006.5 1991 6 199190.3 137361.5 1991 7 199190.3 143038.3 1991 8 199190.3 173498.5 1991 9 187950.1 143608.0 1991 10 171267.0 131087.0 1991 11 136634.8 99949.4 1991 12 80718.4 55533.1 1992 1 58124.5 28047.0 1992 2 31205.4 11673.9 1992 3 28287.5 8868.7 1992 4 38153.2 17627.4 1992 5 106990.3 56792.8 1992 6 192653.7 126404.5 1992 7 199190.3 171141.3 1992 8 199190.3 154684.5 1992 9 175483.5 110293.1 1992 10 135440.6 68467.4 1992 11 80209.6 39964.6 1992 12 36070.9 17447.5 1993 1 22665.5 9028.5 1993 2 10962.3 4567.2 1993 3 10380.6 3253.6 1993 4 14770.1 5298.5 1993 5 47940.8 19620.7 1993 6 117974.1 77326.8 1993 7 166515.2 115471.7 1993 8 179607.8 86113.6 1993 9 193276.4 132859.0 1993 10 185494.4 141908.1 1993 11 146834.2 80894.2 1993 12 64372.2 37540.9 1994 1 34934.9 18640.5 1994 2 13429.8 5293.4 1994 3 11635.0 4422.8 1994 4 9192.9 3045.3 1994 5 28835.6 9638.0 1994 6 119067.6 79802.9 1994 7 199190.3 138165.0 1994 8 199190.3 166101.6 1994 9 167743.4 126775.5 1994 10 199190.3 152866.0 1994 11 195039.1 106419.7 1994 12 60520.7 30135.5 1995 1 22541.4 8288.5 1995 2 11563.3 4311.8 1995 3 7321.0 1955.1 1995 4 7353.4 2077.4 1995 5 36909.8 9142.9 1995 6 138378.1 77275.7 1995 7 199190.3 161467.0 1995 8 199190.3 182222.4 1995 9 199190.3 176580.8 1995 10 147098.8 101141.7 1995 11 117273.8 74386.8 1995 12 75168.9 45849.2 1996 1 37877.5 18694.9 1996 2 25015.3 10179.5 1996 3 14020.0 5378.0 1996 4 12835.3 3963.4 1996 5 14711.8 4613.9 1996 6 103966.0 47828.7 1996 7 155801.5 112707.5 1996 8 183751.5 143201.3 1996 9 171835.5 106637.4 1996 10 141432.3 96403.2 1996 11 100365.7 65673.2 1996 12 53912.1 25712.1 1997 1 21319.0 8204.8 1997 2 15225.9 5150.3 1997 3 9724.2 3205.3 1997 4 7353.4 2208.1 1997 5 58261.1 20812.1 1997 6 116764.6 56490.6 1997 7 190883.3 135578.8 1997 8 199190.3 150269.7 1997 9 199190.3 159939.0 1997 10 169459.1 121244.9 1997 11 167696.3 93664.9 1997 12 43394.5 19455.1 1998 1 12798.1 4781.1 1998 2 7864.4 3156.4 1998 3 6031.5 1978.5 1998 4 7243.7 2179.7 1998 5 57743.8 19222.7 1998 6 90062.7 38742.7 1998 7 114773.4 58080.2 1998 8 167076.3 81472.2 1998 9 198601.3 135569.9 1998 10 109109.7 54555.0 1998 11 68476.9 33390.8 1998 12 50775.9 20152.2 1999 1 2445.0 972.5 1999 2 1223.8 520.2 1999 3 1223.8 379.4 1999 4 1223.8 299.8 1999 5 1223.8 275.3 1999 6 80956.8 30573.0 1999 7 120863.5 76775.0 1999 8 181960.6 134244.7 1999 9 192041.9 146416.0 1999 10 184325.9 123163.5 1999 11 132417.2 67245.9 1999 12 57455.0 32318.9 2000 1 32435.5 14228.1 2000 2 12793.4 5128.5 2000 3 8495.7 2981.6 2000 4 7885.7 2432.1 2000 5 18978.0 5718.7 2000 6 63181.6 19407.6 2000 7 114921.4 65921.1 2000 8 174198.3 110672.1 2000 9 187882.0 133568.0 2000 10 176610.2 121576.6 2000 11 95557.2 60240.9 2000 12 43125.2 26722.1 2001 1 9722.3 3369.0 2001 2 5431.3 1870.4 2001 3 6631.2 2031.9 2001 4 4830.6 1158.9 2001 5 4229.6 1244.4 2001 6 67467.1 24104.6 2001 7 148558.0 97617.9 2001 8 193838.4 136996.9 2001 9 168903.4 136379.5 2001 10 -999.0 -999.0 2001 11 -999.0 -999.0 2001 12 -999.0 -999.0