2 research outputs found
The variability of surface radiation fluxes over landfast sea ice near Zhongshan station, east Antarctica during austral spring
Surface radiative fluxes over landfast sea ice off Zhongshan station have been measured in austral spring for five springs between 2010 and 2015. Downward and upward solar radiation vary diurnally with maximum amplitudes of 473 and 290β
Wβ
mβ2, respectively. The maximum and minimum long-wave radiation values of the mean diurnal cycle are 218 and 210β
Wβ
mβ2 for downward radiation, 277 and 259β
Wβ
mβ2 for upward radiation and 125 and β52β
Wβ
mβ2 for net radiation. The albedo has a U-shaped mean diurnal cycle with a minimum of 0.64 at noon. Sea ice thickness is in the growth phase for most spring days, but can be disturbed by synoptic processes. The surface temperature largely determines the occurrence of ice melting. Surface downward and upward long-wave radiation show synoptic oscillations with a 5β8 day period and intraseasonal variability with a 12β45 day period. The amplitudes of the diurnal, synoptic and intraseasonal variability show some differences during the five austral springs considered here. The intraseasonal and synoptic variability of downward and upward long-wave radiation are associated with the variability of cloud cover and surface temperature induced by the atmospheric circulation