Severi M, Becagli S, Caiazzo L, Ciardini V, Colizza E, Giardi F, Mezgec K, Scarchilli C, Stenni B, Thomas E R, Traversi R, Udisti R
University of Florence, Chemistry Dept. "Ugo Schiff", Via della Lastruccia, 3, 50019, Sesto Fiorentino, FI, Italy.
University of Florence, Chemistry Dept. "Ugo Schiff", Via della Lastruccia, 3, 50019, Sesto Fiorentino, FI, Italy.
Chemosphere. 2017 Jun;177:266-274. doi: 10.1016/j.chemosphere.2017.03.025. Epub 2017 Mar 8.
Antarctic sea ice has shown an increasing trend in recent decades, but with strong regional differences from one sector to another of the Southern Ocean. The Ross Sea and the Indian sectors have seen an increase in sea ice during the satellite era (1979 onwards). Here we present a record of ssNa flux in the Talos Dome region during a 25-year period spanning from 1979 to 2003, showing that this marker could be used as a potential proxy for reconstructing the sea ice extent in the Ross Sea and Western Pacific Ocean at least for recent decades. After finding a positive relationship between the maxima in sea ice extent for a 25-year period, we used this relationship in the TALDICE record in order to reconstruct the sea ice conditions over the 20th century. Our tentative reconstruction highlighted a decline in the sea ice extent (SIE) starting in the 1950s and pointed out a higher variability of SIE starting from the 1960s and that the largest sea ice extents of the last century occurred during the 1990s.
近几十年来，南极海冰呈增加趋势，但南大洋不同区域之间存在显著差异。在卫星时代（1979年起），罗斯海和印度洋区域的海冰有所增加。在此，我们展示了1979年至2003年这25年间塔洛斯穹顶地区的海盐钠通量记录，表明该指标至少在近几十年可作为重建罗斯海和西太平洋海冰范围的潜在替代指标。在发现25年期间海冰范围最大值之间存在正相关关系后，我们利用塔尔迪塞记录中的这种关系来重建20世纪的海冰状况。我们的初步重建结果显示，海冰范围（SIE）自20世纪50年代开始下降，且自60年代起SIE的变率更高，上世纪最大的海冰范围出现在90年代。
