High-altitude cushion peatlands as sentinels of Holocene environmental changes in the Central Andes (NW Argentina)

高海拔垫状泥炭地是安第斯山脉中部（阿根廷西北部）全新世环境变化的哨兵

• 批准号: 193052098
• 负责人: Professor Dr. Frank Schäbitz
• 金额: --
• 依托单位: Catedra de Ecologia
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/193052098?language=en
• 关键词: altitude; cushion; peatlands; sentinels; Holocene

Being located at the crossroads between tropical and extra-tropical precipitation regimes, the southern Central Andes are a key area for palaeoclimatic studies. Our preliminary investigations show that highaltitude cushion peatlands are extremely well-suited for palaeoecological multi-proxy studies. The strengths of these geoarchives are their comparability over climatic gradients, their high accumulation rates and the high quality of their peat deposits to be precisely 14C-dated. Previous palaeoenvironmental investigations in the area on lake sediment archives and fossil rodent middens lack continuity or comparability due to the selection of heterogeneous locations and methods. We propose to carry out a late Pleistocene/Holocene vegetation and climate reconstruction based on a multi-proxy approach (micro-/macrofossils, isotope analysis, geochemical analysis, sedimentology) from peat sediment cores. Geoelectrical earth resistivity tomographies, verified with selective coring, will offer an insight into the structural build-up of the peatlands, which, so far, lack scientific geomorphological description and characterization. The expected results will not only contribute to the controversial discussion whether the middle Holocene in these latitudes was arid or humid, they will further offer palaeoclimatic variabilities, which are indispensable for comparison with continent- or global-scale, high-resolution palaeoclimate records.

中安第斯山脉南部位于热带和温带降水区的十字路口，是古气候研究的关键地区。我们的初步调查表明，高海拔垫状泥炭地非常适合古生态多代理研究。这些地质档案的优势在于它们在气候梯度上的可比性、高积累率以及高质量的泥炭沉积物，可精确测定 14C 年代。以往对该地区湖泊沉积档案和啮齿动物化石群的古环境调查由于地点和方法的选择不均匀而缺乏连续性或可比性。我们建议基于泥炭沉积岩芯的多代理方法（微观/宏观化石、同位素分析、地球化学分析、沉积学）进行更新世晚期/全新世植被和气候重建。通过选择性取芯验证的地电地球电阻率层析成像将提供对泥炭地结构形成的深入了解，迄今为止，泥炭地缺乏科学的地貌描述和表征。预期的结果不仅将有助于这些纬度地区全新世中期是干旱还是潮湿的争议性讨论，还将进一步提供古气候变化，这对于与大陆或全球尺度的高分辨率古气候记录进行比较是必不可少的。

项目成果

A high-altitude peatland record of environmental changes in the NW Argentine Andes (24 ° S) over the last 2100 years

• DOI: 10.5194/cp-12-1165-2016
• 发表时间: 2016-05
• 期刊: Climate of The Past
• 影响因子: 4.3
• 作者: K. Schittek;Sebastian T. Kock;A. Lücke;J. Hense;C. Ohlendorf;J. Kulemeyer;L. Lupo;F. Schäbitz

Environmental and climatic history in the NW Argentine Andes (24° S) over the last 2100 years inferred from a high-altitude peatland record

根据高海拔泥炭地记录推断的阿根廷安第斯山脉西北部（南纬 24°）过去 2100 年的环境和气候历史

• DOI: 10.5194/cpd-11-2037-2015
• 发表时间: 2015
• 期刊: Climate of The Past Discussions
• 作者: Schittek K;Kock ST;Lücke A;Ohlendorf C;Kulemeyer JJ;Lupo LC ;Schäbitz F
• 通讯作者: Schäbitz F