Sea-ice thickness distribution of the Bellingshausen Sea from surface measurements and ICESat altimetry

Xie, Hongjie; Ackley, Stephen F.; Yi, Donghui; Zwally, H. Jay; Wagner, P.; Weissling, Blake; Lewis, Michael J.; Ye, K.

doi:10.1016/j.dsr2.2010.10.038

Cited by 55 publications

(68 citation statements)

References 41 publications

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“…6d): 30 cm, mostly in the MIZ where significant melt occurred into late August, and 130 cm, mostly in the high latitude area, with mean 101 ± 56 cm and median 125 cm for the entire leg, and mean 120 ± 38 cm and median 130 cm for the pack ice zone alone (not shown). None of these two thickness distributions (northward and southward) shows a single peak with long tail to right, which is a common ice thickness distribution from other means such as field measurements and remote sensing (Haas et al, 2008;Wang et al, 2013;Weissling et al, 2011;Xie et al, 2011Xie et al, , 2013Zwally et al, 2008). This behavior indicates that the visual observation of ice thickness (even at the half hourly rate) is still very selective of the level ice thickness and probably undersamples thicker ice.…”

Section: Northward and Southward Legsmentioning

confidence: 83%

“…This behavior indicates that the visual observation of ice thickness (even at the half hourly rate) is still very selective of the level ice thickness and probably undersamples thicker ice. One major reason is that visually observed ice thickness is derived by measuring the thickness of the upturned ice blocks adjacent to the ship's hull against a scale fixed above the water line, while thicker and ridged ice is usually broken apart during overturning (Toyota et al, 2004;Xie et al, 2011). Figure 6 shows the snow and ice thickness measured from the EM31 mounted off the ship's left side.…”

Section: Northward and Southward Legsmentioning

confidence: 99%

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Summer sea ice characteristics and morphology in the Pacific Arctic sector as observed during the CHINARE 2010 cruise

Xie

Lei

et al. 2013

The Cryosphere

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Abstract. In the summer of 2010, atmosphere-ice-ocean interaction was studied aboard the icebreaker R/V Xuelong during the Chinese National Arctic Research Expedition (CHINARE), in the sea ice zone of the Pacific Arctic sector between 150 • W and 180 • W up to 88.5 • N. The expedition lasted from 21 July to 28 August and comprised of ice observations and measurements along the cruise track, 8 short-term stations and one 12-day drift station. Ship-based observations of ice thickness and concentration are compared with ice thickness measured by an electromagnetic induction device (EM31) mounted off the ship's side and ice concentrations obtained from AMSR-E. It is found that the modal thickness from ship-based visual observations matches well with the modal thickness from the mounted EM31. A grid of 8 profiles of ice thickness measurements (four repeats) was conducted at the 12-day drift station in the central Arctic (∼ 86 • 50 N-87 • 20 N) and an average melt rate of 2 cm day −1 , primarily bottom melt, was found. As compared with the 2005 data from the Healy/Oden Trans-Arctic Expedition (HOTRAX) for the same sector but ∼ 20 days later (9 August to 10 September), the summer 2010 was first-year ice dominant (vs. the multi-year ice dominant in 2005), 70 % or less in mean ice concentration (vs. 90 % in 2005), and 94-114 cm in mean ice thickness (vs. 150 cm in 2005). Those changes suggest the continuation of ice thinning, less concentration, and younger ice for the summer sea ice in the sector since 2007 when a record minimum sea ice extent was observed. Overall, the measurements provide a valuable dataset of sea ice morphological properties over the Arctic Pacific Sector in summer 2010 and can be used as a benchmark for measurements of future changes.

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Section: Northward and Southward Legsmentioning

confidence: 83%

Section: Northward and Southward Legsmentioning

confidence: 99%

Summer sea ice characteristics and morphology in the Pacific Arctic sector as observed during the CHINARE 2010 cruise

Xie

Lei

et al. 2013

The Cryosphere

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“…(Worby et al, 2011;Xie et al, 2011). However, these corrections vary regionally, depending on local ice conditions.…”

Section: Modulating the Response To Changementioning

confidence: 99%

Antarctic Sea Ice—A Polar Opposite?

Maksym¹,

Stammerjohn²,

Ackley³

et al. 2012

oceanog

101

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“…They found the highest snow freeboard and the thickest ice in the western Weddell Sea and a clear seasonal cycle of the snow freeboard with the highest values in summer (since all the thin ice is melted away) and lower values in the beginning of winter (due to new ice formation). A comparison between field data and ICESat ground tracks in the Bellingshausen Sea showed a good agreement between both methods (Xie et al, 2011). Recently, Kern and Spreen (2015) estimated the potential uncertainty of sea-ice thicknesses derived from ICESat and AMSR-E snow depths, which ranges between 20 and 80 %.…”

Section: Introductionmentioning

confidence: 99%

About the consistency between Envisat and CryoSat-2 radar freeboard retrieval over Antarctic sea ice

et al. 2016

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Abstract. Knowledge about Antarctic sea-ice volume and its changes over the past decades has been sparse due to the lack of systematic sea-ice thickness measurements in this remote area. Recently, first attempts have been made to develop a sea-ice thickness product over the Southern Ocean from space-borne radar altimetry and results look promising. Today, more than 20 years of radar altimeter data are potentially available for such products. However, the characteristics of individual radar types differ for the available altimeter missions. Hence, it is important and our goal to study the consistency between single sensors in order to develop long and consistent time series. Here, the consistency between freeboard measurements of the Radar Altimeter 2 on board Envisat and freeboard measurements from the SyntheticAperture Interferometric Radar Altimeter on board CryoSat-2 is tested for their overlap period in 2011. Results indicate that mean and modal values are in reasonable agreement over the sea-ice growth season (May-October) and partly also beyond. In general, Envisat data show higher freeboards in the first-year ice zone while CryoSat-2 freeboards are higher in the multiyear ice zone and near the coasts. This has consequences for the agreement in individual sectors of the Southern Ocean, where one or the other ice class may dominate. Nevertheless, over the growth season, mean freeboard for the entire (regionally separated) Southern Ocean differs generally by not more than 3 cm (8 cm, with few exceptions) between Envisat and CryoSat-2, and the differences between modal freeboards lie generally within ±10 cm and often even below.

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Sea-ice thickness distribution of the Bellingshausen Sea from surface measurements and ICESat altimetry

Cited by 55 publications

References 41 publications

Summer sea ice characteristics and morphology in the Pacific Arctic sector as observed during the CHINARE 2010 cruise

Summer sea ice characteristics and morphology in the Pacific Arctic sector as observed during the CHINARE 2010 cruise

Antarctic Sea Ice—A Polar Opposite?

About the consistency between Envisat and CryoSat-2 radar freeboard retrieval over Antarctic sea ice

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