Náttúrufræðingurinn - 2020, Blaðsíða 98

Náttúrufræðingurinn
98
2. viðauki. – 2. Appendix.
Ísalagnir, ísabrot og ísadagar á Þingvallavatni á árunum 1974–2017. – Date of freezing (Ice on), ice break (Ice off) and number of days with com-
plete ice cover (Ice days) in Lake Þingvallavatn during 1974–2017.
Vetur
Winter
Ísalögn
Ice on
Ísabrot
Ice off
Ísadagar
Icedays
Athugasemd
Comment
Heimild
Reference
1974–75 22.12.1974 19.3.1975 88 31
1975–76 13.1.1976 12.3.1976 59 30
1976–77 18.1.1977 12.4.1977 84 30
1977–78 2.1.1978 15.4.1978 103 30
1978–79 3.1.1979 15.5.1979 132 30
1979–80 2.1.1980 13.3.1980 71 30
1980–81 2.1.1981 3.5.1981 121 30
1981–82 13.12.1981 18.4.1982 126 30
1982–83 19.1.1983 11.5.1983 112 30
1983–84 13.1.1984 26.4.1984 104 30
1984–85 23.1.1985 8.3.1985 44 30
1985–86 19.1.1986 23.4.1986 94 30
1986–87 12.2.1987 3.5.1987 80 Ísabrot ónákvæm / Ice off uncertain 31
1987–88 20.1.1988 8.5.1988 108 Ísabrot ónákvæm / Ice off uncertain 31
1988–89 16.2.1989 13.5.1989 90 Ísabrot ónákvæm / Ice off uncertain 31
1989–90 20.2.1990 12.5.1990 81 Ísabrot ónákvæm / Ice off uncertain 31
1990–91 12.1.1991 Örfáir dagar / Very few days 31
1991–92 13.3.1992 20.3.1992 7 32
1992–93 6.1.1993 15.4.1993 100 Óvissa / Uncertainty ± 10 dagar/days 32
1993–94 22.12.1993 1.4.1994 100 Óvissa / Uncertainty ± 12 dagar/days 32
1994–95 15.1.1995 30.3.1995 74 Óvissa / Uncertainty ± 10 dagar/days 32
1995–96 21.12.1995 30.1.1996 41 Óvissa / Uncertainty ± 7 dagar/days 32
1996–97 7.1.1997 30.3.1997 83 Óvissa / Uncertainty ± 7 dagar/days 32
1997–98 17.1.1998 3.2.1998 18 Óvissa / Uncertainty ± 7 dagar/days 32
1998–99 8.1.1999 28.1.1999 21 Óvissa / Uncertainty ± 7 dagar/days 32
1999–2000 20.01.00 14.4.2000 85 Óvissa / Uncertainty ± 7 dagar/days 32
2000–01 27.12.2000 15.3.2001 78 Óvissa / Uncertainty ± 7 dagar/days 32
2001–02 5.2.2001 15.4.2001 70 Óvissa / Uncertainty ± 4 dagar/days 32
2002–03 0 32
2003–04 31.1.2004 2.3.2004 25 Íslaust / No ice 17.2.–22.2.2004 32
2004–05 7.1.2005 8.2.2005 33 Óvissa / Uncertainty ± 3 dagar/days 32
Frh. / Cont.