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

Citation

Mingu, D and Agrawal, A and Heil, P and Diyi, Y, Surface energy balance on the Antarctic plateau as measured with an automatic weather station during 2014, Advances in Polar Science, 30, (2) pp. 93-105. ISSN 1674-9928 (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 Advances in Polar Science

DOI: doi:10.13679/j.advps.2018.0050

Abstract

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 Wm−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.

Item Details

Item Type:Refereed Article
Keywords:energy balance, Antarctica, surface mass loss, CHINARE
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric dynamics
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:Heil, P (Dr Petra Heil)
ID Code:137629
Year Published:2019
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2020-02-24
Last Modified:2020-04-28
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