Antarctic ice sheet and sea ice regional albedo and temperature change, 1981–2000, from AVHRR Polar Pathfinder data

Laine, Vesa

doi:10.1016/j.rse.2007.06.005

Cited by 35 publications

(30 citation statements)

References 27 publications

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“…The terminus of the Donagiri Glacier has exhibited intermittent recession and advance Swaroop et al, 2001), and the Satopanth Glacier, which earlier had been receding at the rate of 22.86 m/year, showed a recession rate of 6.5 m/year during (Ganjoo and Koul, 2009. Most conspicuously, the 70-km-long Siachin glacier "has been standing steady for the last several decades," exhibiting an almost stable terminus that receded by only 8-10 m in -2008(Ganjoo and Koul, 2009 and showing signs of advancement during the last decade (Sinha and Shah, 2008).…”

Section: Other Researchmentioning

confidence: 99%

Observations: Cryosphere

2014

Climate Change 2013 – The Physical Science Basis

142

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Section: Other Researchmentioning

confidence: 99%

Observations: Cryosphere

2014

Climate Change 2013 – The Physical Science Basis

142

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“…Currently, there are not many research projects examining sea ice albedo in Antarctica relative to the Arctic. Sea ice albedo is mainly evaluated using station data and ship-based measurements; there is a shortage of research that uses long term data over a large scale (Laine 2008). Pirazzini (2004) analysed spatial and temporal variability of albedo using surface albedo data from several Antarctic sites.…”

Section: Introductionmentioning

confidence: 99%

Spring–summer albedo variations of Antarctic sea ice from 1982 to 2009

Shao

2015

Environ. Res. Lett.

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This study examined the spring-summer (November, December, January and February) albedo averages and trends using a dataset consisting of 28 years of homogenized satellite data for the entire Antarctic sea ice region and for five longitudinal sectors around Antarctica: the Weddell Sea (WS), the Indian Ocean sector (IO), the Pacific Ocean sector (PO), the Ross Sea (RS) and the Bellingshausen-Amundsen Sea (BS). Time series data of the sea ice concentrations and sea surface temperatures were used to analyse their relations to the albedo. The results indicated that the sea ice albedo increased slightly during the study period, at a rate of 0.314% per decade, over the Antarctic sea ice region. The sea ice albedos in the PO, the IO and the WS increased at rates of 2.599% per decade (confidence level 99.86%), 0.824% per decade and 0.413% per decade, respectively, and the steepest increase occurred in the PO. However, the sea ice albedo in the BS decreased at a rate of −1.617% per decade (confidence level 95.05%) and was near zero in the RS. The spring-summer average albedo over the Antarctic sea ice region was 50.24%. The highest albedo values were mainly found on the continental coast and in the WS; in contrast, the lowest albedo values were found on the outer edge of the sea ice, the RS and the Amery Ice Shelf. The average albedo in the western Antarctic sea ice region was distinctly higher than that in the east. The albedo was significantly positively correlated with sea ice concentration (SIC) and was significantly negatively correlated with sea surface temperature (SST); these scenarios held true for all five longitudinal sectors. Spatially, the higher surface albedos follow the higher SICs and lower SST patterns. The increasing albedo means that Antarctic sea ice region reflects more solar radiation and absorbs less, leading to a decrease in temperature and much snowfall on sea ice, and further resulted in an increase in albedo. Conversely, the decreasing albedo leads to more solar radiation absorbing and sea ice melting, thus resulting in a decrease in albedo.

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“…Especially in the Arctic, a longer sea ice melt season (Markus et al, 2009), thinner ice (Haas et al, 2008), and increased melt pond coverage (Rösel and Kaleschke, 2012) lead to increasing solar shortwave energy deposition in the ice-ocean system (Nicolaus et al, 2012), adding to the increase in absorption due to decreasing sea ice extent (Pistone et al, 2014). However, surface characteristics of Antarctic sea ice are less affected by global climate change (Allison et al, 1993;Brandt et al, 2005;Laine, 2008). Antarctic sea ice is mainly melting from below as the ice drifts away from the continent into warmer circumpolar waters, in contrast to the surface melting induced by melt ponding on Arctic sea ice.…”

Section: Introductionmentioning

confidence: 99%

Brief communication: Increasing shortwave absorption over the Arctic Ocean is not balanced by trends in the Antarctic

2017

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Abstract. On the basis of a new, consistent, long-term observational satellite dataset we show that, despite the observed increase of sea ice extent in the Antarctic, absorption of solar shortwave radiation in the Southern Ocean poleward of 60 • latitude is not decreasing. The observations hence show that the small increase in Antarctic sea ice extent does not compensate for the combined effect of retreating Arctic sea ice and changes in cloud cover, which both result in a total increase in solar shortwave energy deposited into the polar oceans.

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Antarctic ice sheet and sea ice regional albedo and temperature change, 1981–2000, from AVHRR Polar Pathfinder data

Cited by 35 publications

References 27 publications

Observations: Cryosphere

Observations: Cryosphere

Spring–summer albedo variations of Antarctic sea ice from 1982 to 2009

Brief communication: Increasing shortwave absorption over the Arctic Ocean is not balanced by trends in the Antarctic

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