Surface energy balance on the Antarctic plateau as measured with an automatic weather station during 2014
Version 2 2024-09-18, 23:34Version 2 2024-09-18, 23:34
Version 1 2023-05-20, 11:16Version 1 2023-05-20, 11:16
journal contribution
posted on 2024-09-18, 23:34authored byD Mingu, A Agrawal, Petra HeilPetra Heil, Y Diyi
AWS data during 2014 collected at PANDA-N station, on the East Antarctica Plateau, are analysed. Net Short Wave Radiation (QSWR), net Long Wave Radiation (QLWR), sensible (QH), latent (QL) and subsurface or ground (QG) heat fluxes are computed. Annual averages for QSWR, QLWR, QH, QL and QG of 19.65, −49.16, 26.40, −0.77 and 3.86 W·m−2 were derived based on an albedo value of 0.8. QSWR and QH are the major sources of heat gain to the surface and QLWR is the major component of heat loss from the surface. An iterative method is used to estimate surface temperature in this paper; surface temperature of snow/ice is gradually increased or decreased, thereby changing longwave radiation, sensible, latent and subsurface heat fluxes, so that the net energy balance becomes zero. Mass loss due to sublimation at PANDA-N station for 2014 is estimated to be 12.18 mm w.e.·a−1; and mass gain due to water vapour deposition is estimated to be 3.58 mm w.e.·a−1. Thus the net mass loss due to sublimation/deposition is 8.6 mm w.e.·a−1. This study computes surface energy fluxes using a model, instead of direct measurements. Also there are missing data especially for wind speed, though 2 m air temperature data is almost continuously available throughout the year. The uncertainties of albedo, wind speed and turbulent fluxes cause the most probable error in monthly values of QLWR, QH, QL, QG and surface temperature of about ±4%, ±20%, ±50%, ±11% and ±0.74 K respectively.
History
Publication title
Advances in Polar Science
Volume
30
Issue
2
Pagination
93-105
ISSN
1674-9928
Department/School
Institute for Marine and Antarctic Studies
Publisher
Zhongguo Jidi Yanjiusuo,Polar Research Institute of China
Publication status
Published
Place of publication
China
Rights statement
Copyright 2019 Advances in Polar Science
Socio-economic Objectives
190503 Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts), 180103 Atmospheric processes and dynamics