2018
DOI: 10.1098/rsta.2017.0346
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Tensile fracture of a single crack in first-year sea ice

Abstract: The break-up of sea ice in the Arctic and Antarctic has been studied during three field trips in the spring of 1993 at Resolute, NWT, and the fall of 2001 and 2004 on McMurdo Sound via in situ cyclic loading and fracture experiments. In this paper, the back-calculated fracture information necessary to the specification of an accurate viscoelastic fictitious (cohesive) crack model is presented. In particular, the changing shape of the stress separation curve with varying conditions and loading scenarios is reve… Show more

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Cited by 23 publications
(18 citation statements)
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“…An alternative explanation for winter CO 2 efflux is the formation of microcracks in the landfast sea ice cover. Microcracking has been observed through acoustic studies in the Arctic (Dempsey et al, 2018; Milne, 1972) and Antarctica, especially in McMurdo Sound (Cole & Dempsey, 2004; Dempsey et al, 2018; Langhorne & Haskell, 1996). Ice cracking in the Arctic has been ascribed by Milne (1972) to thermal stress—temperature drop—in winter or spring.…”
Section: Discussionmentioning
confidence: 99%
“…An alternative explanation for winter CO 2 efflux is the formation of microcracks in the landfast sea ice cover. Microcracking has been observed through acoustic studies in the Arctic (Dempsey et al, 2018; Milne, 1972) and Antarctica, especially in McMurdo Sound (Cole & Dempsey, 2004; Dempsey et al, 2018; Langhorne & Haskell, 1996). Ice cracking in the Arctic has been ascribed by Milne (1972) to thermal stress—temperature drop—in winter or spring.…”
Section: Discussionmentioning
confidence: 99%
“…Second, the uppermost portion of the ice experiences thermal contraction in response to rapid temperature drops and would thus be under tensional stress, as is observed for sea ice during cold weather (Dempsey et al, ; Evans & Untersteiner, ; Richter‐Menge & Elder, ). Similar behavior has been observed in some alpine glaciers, which exhibit thermal fracturing in response to cold nighttime temperatures (Podolskiy et al, ; Zhang et al, ).…”
Section: Temperature Controls Multiday and Seasonal Patterns In Seismmentioning
confidence: 99%
“…Moreover, the specimens harvested from floating ice sheets lose brine once removed from the sheet; warm ice in particular can lose a significant amount of brine, which could significantly alter the mechanical properties in subsequent experiments. In addition, some remaining brine (for example, in capillary brine channels) must freeze during the storage process of dry specimens; this may as well lead to some difference in the macroscopic mechanical behavior (for example, in elastic modulus) of dry and floating specimens (Marchenko and Lishman, 2017;Eicken, 1992;Jones et al, 2012;Gough et al, 2012). The methodology developed in the present effort avoids such problems and is expected to produce more realistic mechanical behavior, particularly when interest centers on behavior at relatively warm temperatures where brine drainage is extensive.…”
Section: Discussionmentioning
confidence: 99%