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海氷統計情報
- 海上保安官署にて観測した流氷の観測状況です．
- 平年値は1991年～2020年の30ヵ年において，海氷を観測した年数が8年以上あった場合の平均値を算出し，平年値としています．
- 観測地点の羅臼においては，2008年から平日のみの観測となったため「[ ]」としております．
- 流氷初日・終日に関しては，海氷の知識を参照下さい．
- 海氷観測30年統計(1991-2020年)【PDF:2.5MB】
流氷初日
| 海氷年 | 稚内 | 紋別 | 網走 | 羅臼 | 根室 | 花咲 |
|---|---|---|---|---|---|---|
| 2001 | 1/8 | 1/8 | 1/7 | 1/18 | 1/23 | 1/28 |
| 2002 | - | 1/30 | 1/16 | 1/18 | 2/2 | - |
| 2003 | - | 1/24 | 1/11 | 1/21 | 1/23 | 2/19 |
| 2004 | - | 2/1 | 2/1 | 2/9 | 2/17 | - |
| 2005 | - | 1/23 | 1/28 | 2/8 | 2/17 | - |
| 2006 | 4/5 | 2/3 | 1/30 | 1/30 | 2/7 | 2/20 |
| 2007 | - | 1/20 | 1/27 | 2/25 | - | - |
| 2008 | 2/25 | 1/21 | 1/21 | [2/4] | 2/22 | 3/4 |
| 2009 | - | 2/10 | 2/7 | [3/2] | 2/24 | - |
| 2010 | - | 2/8 | 1/22 | [2/1] | - | - |
| 2011 | - | 1/27 | 1/20 | [1/31] | 2/13 | 2/17 |
| 2012 | 3/9 | 2/1 | 1/20 | [1/27] | 1/31 | - |
| 2013 | 2/15 | 1/17 | 1/15 | [1/24] | 2/1 | 2/14 |
| 2014 | 2/21 | 1/27 | 1/28 | [2/10] | 2/22 | 3/3 |
| 2015 | - | 1/16 | 1/16 | [2/17] | 2/7 | 2/18 |
| 2016 | - | 2/9 | 2/2 | [3/25] | - | - |
| 2017 | 1/25 | 1/26 | 1/31 | [2/15] | 2/25 | 3/22 |
| 2018 | 2/6 | 2/1 | 1/30 | [2/19] | 2/19 | - |
| 2019 | - | 1/28 | 1/28 | [2/7] | 2/12 | - |
| 2020 | 3/6 | 1/28 | 2/7 | [2/17] | 3/6 | 3/8 |
| 2021 | - | - | 1/24 | [2/15] | 3/4 | - |
| 2022 | - | - | 1/28 | [2/4] | 2/14 | 3/14 |
| 2023 | 2/22 | - | 2/5 | [2/7] | 2/18 | - |
| 2024 | - | - | 1/20 | [2/5] | 2/7 | 3/11 |
| 2025 | - | - | 2/16 | [2/25] | 3/16 | - |
| 平年値 (1991-2020) | 2/20 | 1/28 | 1/26 | [2/10] | 2/15 | 3/4 |
流氷終日
| 海氷年 | 稚内 | 紋別 | 網走 | 羅臼 | 根室 | 花咲 |
|---|---|---|---|---|---|---|
| 2001 | 3/8 | 3/21 | 4/7 | 4/17 | 4/2 | 2/22 |
| 2002 | - | 3/8 | 3/16 | 3/24 | 3/2 | - |
| 2003 | - | 4/14 | 4/23 | 4/27 | 4/13 | 4/6 |
| 2004 | - | 3/9 | 3/11 | 4/1 | 3/11 | - |
| 2005 | - | 3/15 | 3/19 | 4/5 | 3/12 | - |
| 2006 | 4/5 | 4/8 | 2/16 | 2/26 | 2/23 | 2/20 |
| 2007 | - | 3/23 | 3/6 | 2/26 | - | - |
| 2008 | 2/25 | 4/8 | 4/13 | [4/11] | 4/14 | 3/9 |
| 2009 | - | 3/4 | 3/8 | [3/4] | 2/24 | - |
| 2010 | - | 3/11 | 3/12 | [3/4] | - | - |
| 2011 | - | 2/19 | 3/10 | [3/25] | 3/9 | 2/27 |
| 2012 | 3/17 | 3/31 | 4/5 | [4/4] | 4/1 | - |
| 2013 | 3/7 | 3/10 | 3/21 | [3/12] | 3/10 | 3/8 |
| 2014 | 2/23 | 4/7 | 4/30 | [4/30] | 4/13 | 4/9 |
| 2015 | - | 3/15 | 3/7 | [3/20] | 3/7 | 3/18 |
| 2016 | - | 3/8 | 3/18 | [3/29] | - | - |
| 2017 | 1/25 | 3/2 | 4/20 | [4/7] | 4/6 | 4/8 |
| 2018 | 2/6 | 2/26 | 3/27 | [3/27] | 2/23 | - |
| 2019 | - | 2/22 | 3/6 | [4/1] | 3/27 | - |
| 2020 | 3/12 | 3/27 | 4/4 | [4/6] | 3/10 | 3/15 |
| 2021 | - | - | 3/23 | [3/26] | 3/20 | - |
| 2022 | - | - | 3/25 | [3/18] | 3/26 | 3/18 |
| 2023 | 2/22 | - | 3/12 | [3/17] | 3/6 | - |
| 2024 | - | - | 4/2 | [4/4] | 3/30 | 3/11 |
| 2025 | - | - | 3/23 | [4/3] | 3/20 | - |
| 平年値 (1991-2020) | 3/3 | 3/21 | 3/28 | [4/2] | 3/21 | 3/19 |