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  • Station or cluster: CryoNet Station
  • Type: Primary
  • Attribute(s): Cal/val, Research
  • Belongs to cluster: Mera
  • WMO ID (if any):
  • Shape: polygon
  • Latitude, longitude: 27.7, 86.9
  • Altitude and/or range (m): 4940-6420
  • Landscape: Coastal
  • Year established: 2007
  • Year-round? Yes
  • Operations contact: Patrick Wagnon
  • Science contact: Yves Arnaud
  • Data contact: Patrick Wagnon

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Primary CryoNet Station Information

Mera Glacier (27.7° N, 86.9° E, 5.1 km2) is a debris-free glacier straddling Hinku valley and Hunku valley (Dudh Koshi basin, Everest region, central Himalaya), and has been monitored since 2007. Mera Peak is popular among the climbers because of its gentle slopes (mean slope of ~16°) and its 5 to 7 day access from Lukla airport.From the summit at 6420ma.s.l., the glacier flows north and divides into two main branches at 5800ma.s.l. The main branch flows north and then west down to its snout at 4940ma.s.l. while the second branch is northeast orientated with its lowest elevation at 5260ma.s.l. These two branches are referred as Mera and Naulek, respectively. Naulek is also part of the glacierized complex covering the northern slopes of Naulek Peak located ~3.5 km southeast of Mera Peak. Mera Peak is one of the most southern mountains of the region, and thus occupies a frontal position against the Indian monsoon flux.

Other Networks to Which This CryoNet Station Belongs

Measurement Methods Used

Data Information


Wagnon P, C. Vincent, Y. Arnaud, E. Berthier, E. Vuillermoz, S. Gruber, M. Ménégoz, A. Gilbert, M. Dumont, J. M. Shea, D. Stumm, and B. K. Pokhrel. Seasonal and annual mass balances of Mera and Pokalde glaciers (Nepal Himalaya) since 2007. 2013. The Cryosphere, 7, 1769–1786, doi:10.5194/tc-7-1769-2013.


The measurements made at Mera are listed in the following tables. (Note: If End Year is blank, measurements are ongoing.)

Cryosphere Measurements

Element Variable Start Year End Year Frequency
GlacierAnnual mass balance2007Continuous
GlacierWinter mass balance2007Continuous
GlacierSurface topography2007Fragmented

Atmosphere Measurements

Element Variable Start Year End Year Frequency
MetAir temperature2012Continuous
MetHumidity/vapour pressure2012Continuous
MetWind speed and direction2012Continuous
MetAir pressure2013Continuous
MetSensible and latent heat2012Continuous
RadiationDownwelling shortwave2012Continuous
RadiationUpwelling shortwave2012Continuous
RadiationDownwelling longwave2012Continuous
RadiationUpwelling longwave2012Continuous

Last updated: 31 May 2017