Abstract
AbstractThe surface energy budget over the Antarctic sea ice from 8 April 2016 through 26 November 2016 are presented. From April to October, Sensible heat flux (SH) and subsurface conductive heat flux (G) were the heat source of surface while latent heat flux (LE) and net radiation flux (Rn) were the heat sink of surface. Our results showed larger downwardSH(due to the warmer air in our site) and upwardLE(due to the drier air and higher wind speed in our site) compared with SHEBA data. However, the values ofSHin N-ICE2015 campaign, which located at a zone with stronger winds and more advection of heat in the Arctic, were comparable to our results under clear skies. The values of aerodynamic roughness length (z0m) and scalar roughness length for temperature (z0h), being 1.9 × 10−3m and 3.7 × 10−5m, were suggested in this study. It is found that snow melting might increasez0m. Our results also indicate that the value of log(z0h/z0m) was related to the stability of stratification. In addition, several representative parameterization schemes forz0hhave been tested and a couple of schemes were found to make a better performance.
Highlights
The surface fluxes over sea ice influence the mass balance and drift direction of sea ice (e.g. Vihma and others, 2009)
Previous studies show that Monin-Obukhov similarity theory (MOST) is applicable from unstable to stable conditions in Polar Regions (e.g. Garratt, 1992; Rodrigo and Anderson, 2013; Liu and others, 2019), some limitations exist when the gradient Richardson number is larger than ∼0.2–0.25 (Grachev and others, 2013)
The wind speed in November showed a significant daily variation, which was related to the land-sea breeze
Summary
The surface fluxes over sea ice influence the mass balance and drift direction of sea ice (e.g. Vihma and others, 2009). Most existing observational records over the Antarctic sea ice are either too short or do not involve all surface energy budget components With these limited observations, the sea-ice conditions around Antarctica were found to be quite different from the Arctic (Wendler and others, 2000). Garratt, 1992; Rodrigo and Anderson, 2013; Liu and others, 2019), some limitations exist when the gradient Richardson number is larger than ∼0.2–0.25 (Grachev and others, 2013) Before using these MOST-based models to estimate surface turbulent fluxes over sea ice, the real surface energy budget status as well as some crucial parameters, such as roughness lengths, must be ascertained or verified from observation (Munro, 1989; King and others, 1990; Yagüe and Cano, 1994; Cassano and others, 2001; Cullen and others, 2007; Vignon and others, 2017)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
