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Surface energy balance on the Antarctic plateau as measured with an automatic weather station during 2014

Version 2 2024-09-18, 23:34
Version 1 2023-05-20, 11:16
journal contribution
posted on 2024-09-18, 23:34 authored by D 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

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