Sea ice statistics.

Observation point

The first view of the sea ice

Ice YearWakkanaiMonbetuAbashiriRausuNemuroHanasakiShirito Hana
1996-Feb.07Jan.31Feb.05Feb.11Mar.18-
1997-Jan.28Jan.24Jan.31Feb.03Mar.24Mar.22
1998-Jan.26Jan.25Feb.07Feb.12Mar.07-
1999-Feb.04Jan.17Jan.24Feb.14Apr.07Mar.19
2000-Jan.22Jan.26Feb.05Feb.10Mar.08-
2001Jan.08Jan.08Jan.07Jan.18Jan.23Jan.28Feb.02
2002-Jan.30Jan.16Jan.18Feb.02--
2003-Jan.24Jan.11Jan.21Jan.23Feb.19Feb.28
2004-Feb.01Feb.01Feb.09Feb.17--
2005-Jan.23Jan.28Feb.08Feb.17--
2006Apr.05Feb.03Jan.30Jan.30Feb.07Feb.20-
2007-Jan.20Jan.27Feb.25---
2008Feb.25Jan.21Jan.21(Feb.25)Feb.22Mar.04X
2009-Feb.10Feb.07(Mar.02)Feb.24-X
2010-Feb.08Jan.22(Feb.01)--X
2011-Jan.27Jan.20(Jan.31)Feb.13Feb.17X
2012Mar.09Feb.01Jan.20(Jan.27)Jan.31-X
2013Feb.15Jan.17Jan.15(Jan.24)Feb.01Feb.14X
2014Feb.21Jan.27Jan.28(Feb.20)Feb.22Mar.03X
2015-Jan.16Jan.16(Feb.17)Feb.07Feb.18X
2016-Feb.09Feb.02(Mar.25)--X
2017Jan.25Jan.26Jan.31(Feb.15)Feb.25Mar.22X
average(past 30 years)Feb.14Jan.28Jan.24Feb.07Feb.13Mar.04Feb.24

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The last view of the sea ice

Ice YearWakkanaiMonbetuAbashiriRausuNemuroHanasakiShirito Hana
1996-Mar.24Apr.22Apr.21Mar.28Mar.22-
1997-Mar.17Mar.20Mar.31Mar.24Mar.24Mar.22
1998-Mar.21Mar.22Apr.09Mar.25Mar.17-
1999-Apr.12Apr.17Apr.30Apr.14Apr.07Mar.19
2000-Mar.24Apr.04Mar.28Apr.03Mar.30-
2001Mar.08Mar.21Apr.07Apr.17Apr.02Feb.22Mar.15
2002-Mar.08Mar.16Mar.24Mar.02--
2003-Apr.14Apr.23Apr.27Apr.13Apr.06Mar.14
2004-Mar.09Mar.11Apr.01Mar.11--
2005-Mar.15Mar.19Apr.05Mar.12--
2006Apr.05Apr.08Feb.16Feb.26Feb.23Feb.20-
2007-Mar.23Mar.06Feb.26---
2008Feb.25Apr.08Apr.13(Apr.11)Apr.14Mar.09X
2009-Mar.04Mar.08(Mar.04)Feb.24-X
2010-Mar.11Mar.12(Mar.04)--X
2011-Feb.19Mar.10(Mar.25)Mar.09Feb.27X
2012Mar.17Mar.31Apr.05(Apr.04)Apr.01-X
2013Mar.07Mar.10Mar.21(Mar.12)Mar.10Mar.08X
2014Feb.23Apr.07Apr.30(Apr.30)Apr.13Apr.09X
2015-Mar.15Mar.07(Mar.20)Mar.07Mar.18X
2016-Mar.08Mar.18(Mar.29)--X
2017Jan.25Mar.2Apr.20(Apr.7)Apr.6Apr.8X
average(past 30 years)Mar.09Mar.28Apr.01Apr.05Mar.24Mar.20Mar.19