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1. Arctic Ice Chart, April 12, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 12, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

2. Arctic Ice Chart, April 16, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 16, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

3. Arctic Ice Chart, April 2, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 2, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

4. Arctic Ice Chart, April 24, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 24, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

5. Arctic Ice Chart, April 26, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 26, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

6. Arctic Ice Chart, April 30, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 30, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

7. Arctic Ice Chart, April 5, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 5, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

8. Arctic Ice Chart, April 9, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for April 9, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

9. Arctic Ice Chart, August 16, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 16, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

10. Arctic Ice Chart, August 2, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 2, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

11. Arctic Ice Chart, August 20, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 20, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

12. Arctic Ice Chart, August 23, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 23, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

13. Arctic Ice Chart, August 27, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 27, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

14. Arctic Ice Chart, August 30, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 30, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

15. Arctic Ice Chart, August 6, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for August 6, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

16. Arctic Ice Chart, December 10, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 10, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

17. Arctic Ice Chart, December 13, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 13, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

18. Arctic Ice Chart, December 17, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 17, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

19. Arctic Ice Chart, December 20, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 20, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

20. Arctic Ice Chart, December 28, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 28, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

21. Arctic Ice Chart, December 3, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 3, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

22. Arctic Ice Chart, December 6, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for December 6, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

23. Arctic Ice Chart, February 1, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 1, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

24. Arctic Ice Chart, February 12, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 12, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

25. Arctic Ice Chart, February 16, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 16, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

26. Arctic Ice Chart, February 21, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 21, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

27. Arctic Ice Chart, February 23, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 23, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

28. Arctic Ice Chart, February 26, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 26, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

29. Arctic Ice Chart, February 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for February 8, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

30. Arctic Ice Chart, January 11, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 11, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

31. Arctic Ice Chart, January 15, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 15, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

32. Arctic Ice Chart, January 18, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 18, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

33. Arctic Ice Chart, January 2, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 2, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

34. Arctic Ice Chart, January 22, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 22, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

35. Arctic Ice Chart, January 25, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 25, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

36. Arctic Ice Chart, January 29, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 29, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

37. Arctic Ice Chart, January 4, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 4, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

38. Arctic Ice Chart, January 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for January 8, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

39. Arctic Ice Chart, July 10, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 10, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

40. Arctic Ice Chart, July 12, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 12, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

41. Arctic Ice Chart, July 16, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 16, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

42. Arctic Ice Chart, July 19, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 19, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

43. Arctic Ice Chart, July 2, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 2, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

44. Arctic Ice Chart, July 23, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 23, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

45. Arctic Ice Chart, July 26, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 26, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

46. Arctic Ice Chart, July 30, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 30, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

47. Arctic Ice Chart, July 5, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for July 5, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

48. Arctic Ice Chart, June 1, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 1, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

49. Arctic Ice Chart, June 13, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 13, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

50. Arctic Ice Chart, June 19, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 19, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

51. Arctic Ice Chart, June 22, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 22, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

52. Arctic Ice Chart, June 27, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 27, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

53. Arctic Ice Chart, June 29, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 29, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

54. Arctic Ice Chart, June 4, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 4, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

55. Arctic Ice Chart, June 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for June 8, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

56. Arctic Ice Chart, March 12, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 12, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

57. Arctic Ice Chart, March 15, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 15, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

58. Arctic Ice Chart, March 19, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 19, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

59. Arctic Ice Chart, March 22, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 22, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

60. Arctic Ice Chart, March 26, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 26, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

61. Arctic Ice Chart, March 29, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 29, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).

62. Arctic Ice Chart, March 5, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 5, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

63. Arctic Ice Chart, March 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 8, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).

64. Arctic Ice Chart, May 10, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 10, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

65. Arctic Ice Chart, May 14, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 14, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

66. Arctic Ice Chart, May 18, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 18, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

67. Arctic Ice Chart, May 21, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 21, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

68. Arctic Ice Chart, May 24, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 24, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

69. Arctic Ice Chart, May 29, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 29, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).

70. Arctic Ice Chart, May 3, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 3, 1973. This layer is part of the Arctic Climate System (ACSYS) Hist... Arctic Climate System (ACSYS).

71. Arctic Ice Chart, May 7, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for May 7, 1973. This layer is part of the Arctic Climate System (ACSYS) Hist... Arctic Climate System (ACSYS).

72. Arctic Ice Chart, November 12, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 12, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

73. Arctic Ice Chart, November 16, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 16, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

74. Arctic Ice Chart, November 19, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 19, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

75. Arctic Ice Chart, November 2, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 2, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

76. Arctic Ice Chart, November 22, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 22, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

77. Arctic Ice Chart, November 26, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 26, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

78. Arctic Ice Chart, November 29, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 29, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

79. Arctic Ice Chart, November 5, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 5, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

80. Arctic Ice Chart, November 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for November 8, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

81. Arctic Ice Chart, October 1, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 1, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

82. Arctic Ice Chart, October 11, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 11, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

83. Arctic Ice Chart, October 15, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 15, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

84. Arctic Ice Chart, October 18, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 18, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

85. Arctic Ice Chart, October 23, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 23, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

86. Arctic Ice Chart, October 25, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 25, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

87. Arctic Ice Chart, October 30, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 30, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).

88. Arctic Ice Chart, October 4, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 4, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

89. Arctic Ice Chart, October 8, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for October 8, 1973. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).

90. Arctic Ice Chart, September 10, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 10, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

91. Arctic Ice Chart, September 13, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 13, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

92. Arctic Ice Chart, September 17, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 17, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

93. Arctic Ice Chart, September 21, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 21, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

94. Arctic Ice Chart, September 24, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 24, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

95. Arctic Ice Chart, September 27, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 27, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).

96. Arctic Ice Chart, September 3, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 3, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).

97. Arctic Ice Chart, September 6, 1973

1973. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for September 6, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).