Central antarctic climate response to the solar cycle

作者：Volobuev D M^*

来源：Climate Dynamics, 2014, 42(9-10): 2469-2475.

DOI：10.1007/s00382-013-1925-3

• Solar cycle
• Antarctic climate
• IHCP

Antarctic "Vostok" station works most closely to the center of the ice cap among permanent year-around stations. Climate conditions are exclusively stable: low precipitation level, cloudiness and wind velocity. These conditions can be considered as an ideal model laboratory to study the surface temperature response on solar irradiance variability during 11-year cycle of solar activity. Here we solve an inverse heat conductivity problem: calculate the boundary heat flux density (HFD) from known evolution of temperature. Using meteorological temperature record during (1958-2011) we calculated the HFD variation about 0.2-0.3 W/m(2) in phase with solar activity cycle. This HFD variation is derived from 0.5 to 1 degrees C temperature variation and shows relatively high climate sensitivity per 0.1 % of solar radiation change. This effect can be due to the polar amplification phenomenon, which predicts a similar response 0.3-0.8 degrees C/0.1 % (Gal-Chen and Schneider in Tellus 28:108-121, 1975). The solar forcing (TSI) is disturbed by volcanic forcing (VF), so that their linear combination TSI + 0.5VF empirically provides higher correlation with HFD (r = 0.63 +/- 0.22) than TSI (r = 0.50 +/- 0.24) and VF (r = 0.41 +/- 0.25) separately. TSI shows higher wavelet coherence and phase agreement with HFD than VF.

• 出版日期2014-5