Camilla K. Crockart, T. Vance, A. Fraser, N. Abram, A. Criscitiello, M. Curran, V. Favier, A. Gallant, H. Kjær, A. Klekociuk, Lenneke M. Jong, A. Moy, C. Plummer, P. Vallelonga, J. Wille, Lingwei Zhang
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引用次数: 2
摘要
摘要古气候档案，如高分辨率冰芯记录，提供了研究长期(多百年)气候变率的手段。直到最近，洛穹(南穹顶)冰芯记录仍然是东南极洲为数不多的长期高分辨率记录之一。2017/2018年，在Law Dome以西约1000公里的Mount Brown South钻取了一个新的冰芯，提供了一个额外的高分辨率记录，该记录可能跨越东南极洲印度洋地区的过去千年。在这里，我们比较了1975-2016年期间布朗山南部记录上部(~21 m)的降雪积累率和海盐浓度，以及更新的Law Dome记录。南布朗山记录的年海盐浓度为厄尔Niño-Southern涛动(ENSO;在南方冬春季，r = 0.521, p
El Niño Southern Oscillation signal in a new East Antarctic ice core,
Mount Brown South
Abstract. Paleoclimate archives, such as high-resolution ice core records, provide a means to investigate long-term (multi-centennial) climate variability. Until recently, the Law Dome (Dome Summit South) ice core record remained one of few long-term high-resolution records in East Antarctica. A new ice core drilled in 2017/2018 at Mount Brown South, approximately 1000 km west of Law Dome, provides an additional high-resolution record that will likely span the last millennium in the Indian Ocean sector of East Antarctica. Here, we compare snowfall accumulation rates and sea salt concentrations in the upper portion (~21 m) of the Mount Brown South record, and an updated Law Dome record over the period 1975–2016. Annual sea salt concentrations from the Mount Brown South record preserves a stronger signal for the El Niño-Southern Oscillation (ENSO; in austral winter and spring, r = 0.521, p
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