Processes governing the mass balance of Chhota Shigri Glacier (western Himalaya, India) assessed by point-scale surface energy balance measurements
Summary: This paper presents point-scale surface energy balance on Chhota Shigri Glacier, Western Himalaya, India. Energy is available for melting only in summer-monsoon. Net all-wave radiation is the main heat flux towards the glacier surface accounting for 80% of the total melting energy followed by sensible (13%), latent (5%) turbulent and conductive (2%) heat fluxes. The intensity of summer-monsoon snowfalls is found among the most important drivers controlling the mass balance of this glacier.
Detailed ice loss pattern in the northern Antarctic Peninsula: widespread decline driven by ice front retreats
Summary: This study of one of the most rapidly changing glacier regions on earth -- the Antarctic Peninsula -- uses two types of satellite data to measure the rates of ice loss in detail for the individual glaciers. The satellite data is laser altimetry from ICESat and stereo image DEM differences. The results show that 24..9 ± 7.8 billion tons of ice are lost from the region north of 66°S on the peninsula each year. The majority of the data cover 2003-2008.
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation
A. P. Wright, A. M. Le Brocq, S. L. Cornford, R. G. Bingham, H. F. J. Corr, F. Ferraccioli, T. A. Jordan, A. J. Payne, D. M. Rippin, N. Ross, and M. J. Siegert The Cryosphere, 8, 2119-2134, 2014 AbstractFinal Revised Paper (PDF, 6027 KB)Discussion Paper (TCD)
24 Nov 2014
Combining damage and fracture mechanics to model calving
Snowmelt onset over Arctic sea ice from passive microwave satellite data: 1979–2012
Summary: A new version of the Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures is now available. From this data set, a statistical summary of melt onset (MO) dates on Arctic sea ice is presented. Significant trends indicate that MO is occurring 6.6days/decade earlier in the year for the Arctic while regional trends in MO are as great as 11.8days/decade earlier in the East Siberian Sea. The Bering Sea is an outlier where MO is occurring 3.1days/decade later.
Summary: We address the dynamic glaciology of glacier-like forms (GLFs) on Mars, over 1300 of which are located in the planet's midlatitude regions. We present case studies to gain insight into (i) the former extent of GLFs, (ii) GLF motion and surface crevassing, (iii) GLF debris transfer (suggesting a best-estimate surface velocity of 7.5 mm/a over the past 2 Ma), and (iv) putative GLF surface hydrology. Finally, we present several possible research directions for the future study of Martian GLFs.