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Table 1.

Summary of on-ice albedo surveys carried out during the MOSAiC (2020) campaign

MOSAiC (2020)
Survey InformationLeg 3 on CO1Leg 4 on CO2Leg 5 on CO3SHEBA (1998)b
Active dates Apr 7–May 12 Jun 20–Jul 29 Aug 21–Sep 15 Apr 1–Sep 29 
Ice type, total survey length (m) First-year, 150; second-year, 200 First-year, 350; second-year, 200 First-year, 340 Multiyear, 200 
Survey line name, ice type, total length (m), interval (m) ROV3, First-year, 150, 10; SYI Line, second-year, 200, 10 Lemon Drop (LD), first-year, 200, 5; Root Beer Barrel (RBB), second-year, 200, 5; ROV4, first-year, 150, 5 Kinder, first-year, 200 (sheared to 140 on Aug 22), 5; ROV grid (Bounty), first-year, 60, 5; Toblerone, first-year, 140 (40 m spur on ridged ice), 5 Main albedo line, multiyear, 200, 2.5 (αtot), 5 (αλ
Albedo measurements αtot αtot, αλ αtot, αλ αtot, αλ 
Dates measureda ROV3: Apr 7, 11, 17, 18, 22, 25, 29, May 2, 12; SYI: Apr 29, May 2, 12 (revisited Leg 4 Jun 29a, Jul 15) LD: Jun 19a, 20, 21, 22, 24, 26, 30, Jul 6, 7, 13, 17, 21, 24, 29; RBB: Jun 19, 20, 21, 26, 30, Jul 6, 7, 13, 17, 21, 23, 27; ROV4: Jun 27, 28, Jul 4, 7, 10, 11, 14, 21, 28 Kinder: Aug 21a, 23, 24, 25, 27, 29, Sep 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 19; Bounty: Aug 25, 29, 31, Sep 2, 12, 19; Toblerone: Sep 6, 8, 11, 12, 15, 17, 19 65 dates 
Coordinated physical property measurements Snow depth, ice thickness Snow depth, pond depth, SSL thickness, total ice thickness Snow depth, pond depth, SSL thickness, total ice thickness Snow depth, pond depth, SSL thickness 
Melt, freeze onset dates May 26 (initial), Jun 9 (continuous) (not applicable) Aug 26 (initial), Sep 16 (continuous) May 29 
MOSAiC (2020)
Survey InformationLeg 3 on CO1Leg 4 on CO2Leg 5 on CO3SHEBA (1998)b
Active dates Apr 7–May 12 Jun 20–Jul 29 Aug 21–Sep 15 Apr 1–Sep 29 
Ice type, total survey length (m) First-year, 150; second-year, 200 First-year, 350; second-year, 200 First-year, 340 Multiyear, 200 
Survey line name, ice type, total length (m), interval (m) ROV3, First-year, 150, 10; SYI Line, second-year, 200, 10 Lemon Drop (LD), first-year, 200, 5; Root Beer Barrel (RBB), second-year, 200, 5; ROV4, first-year, 150, 5 Kinder, first-year, 200 (sheared to 140 on Aug 22), 5; ROV grid (Bounty), first-year, 60, 5; Toblerone, first-year, 140 (40 m spur on ridged ice), 5 Main albedo line, multiyear, 200, 2.5 (αtot), 5 (αλ
Albedo measurements αtot αtot, αλ αtot, αλ αtot, αλ 
Dates measureda ROV3: Apr 7, 11, 17, 18, 22, 25, 29, May 2, 12; SYI: Apr 29, May 2, 12 (revisited Leg 4 Jun 29a, Jul 15) LD: Jun 19a, 20, 21, 22, 24, 26, 30, Jul 6, 7, 13, 17, 21, 24, 29; RBB: Jun 19, 20, 21, 26, 30, Jul 6, 7, 13, 17, 21, 23, 27; ROV4: Jun 27, 28, Jul 4, 7, 10, 11, 14, 21, 28 Kinder: Aug 21a, 23, 24, 25, 27, 29, Sep 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 19; Bounty: Aug 25, 29, 31, Sep 2, 12, 19; Toblerone: Sep 6, 8, 11, 12, 15, 17, 19 65 dates 
Coordinated physical property measurements Snow depth, ice thickness Snow depth, pond depth, SSL thickness, total ice thickness Snow depth, pond depth, SSL thickness, total ice thickness Snow depth, pond depth, SSL thickness 
Melt, freeze onset dates May 26 (initial), Jun 9 (continuous) (not applicable) Aug 26 (initial), Sep 16 (continuous) May 29 

a Dates in bold indicate both broadband and spectral albedo measurements.

b From Perovich et al. (2002).

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