Introduction to “Progress towards reconstructing past climate in Central Eurasia, with special emphasis on Lake Baikal”
Introduction to “Progress towards reconstructing past climate in Central Eurasia, with special emphasis on Lake Baikal”
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“重建欧亚大陆中部过去气候的进展，特别是贝加尔湖”简介
DOI：
10.1016/j.gloplacha.2004.11.003
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发表时间：
2005
影响因子：
3.9
通讯作者：
A. Mackay
中科院分区：
文献类型：
--
作者：
H. Oberhänsli;A. Mackay
在过去的150年里，欧亚大陆中部经历了全球变暖的最大增长。IPCC（2001）关于气候变化的区域影响的特别报告表明，二氧化碳浓度加倍将进一步加剧地理、生产力、水量和水质的变化。然而，在这一地区，无论是准现实的气候模型实验和古气候重建从代理人在自然档案中的代表性不足。考虑到欧亚大陆中部的偏远（远离冰盖和海洋影响），简单地从大西洋或太平洋地区推断气候变化信号是不明智的。因此，我们对大尺度气候过程（如北大西洋涛动和西风带与季风之间的相互作用）如何影响这些大陆区域的认识存在重大空白。对气候变化研究概念而言，重要的是测试模型的古生态方案，以改进模型参数化，并将这些最近的气候变率趋势置于更长时间尺度的视角中。在这方面，贝加尔湖位于西伯利亚中南部，是气候变化研究中最令人兴奋的湖泊之一，过去15年来在贝加尔湖国际生态研究中心和贝加尔湖钻探项目（贝加尔湖钻探项目BDP-96（第二部分）成员，1997年; Grachev等人，1997，1998; Kuzmin等人，2001年; Kashiwaya，2003年）-综合社区发展方案和IGBP PAGES-PANASH倡议。以前的研究涵盖了冰期-间冰期的时间尺度，清楚地表明了轨道对沉积物参数的控制，揭示了明显的岁差和离心率周期性（Colman等人，1995;威廉姆斯等人，1997年，Kashi-waya等人，2001年）。然而，贝加尔湖沉积档案也有可能敏感地记录气候变化的高时间分辨率（十年至百年）在最近的时间尺度。尽管人们对人类活动对环境和生态的影响表示强烈关注，
Over the last 150 years, Central Eurasia has experienced the largest increase in global warming. The IPCC (2001) special report on regional impacts of climate change suggests that a doubling of CO2 concentration will further act to exacerbate changes in biogeography, productivity, water quantity, and water quality. Yet, in this region, both experiments with quasi-realistic climate models and palaeoclimate reconstructions from proxies in natural archives are underrepresented. Given the remoteness of Central Eurasia (far from ice sheet and oceanic influences), it is not prudent to simply extrapolate climate change signals from the Atlantic or the Pacific regions. Hence, there is an important gap in our knowledge of how large-scale climate processes, such as the North Atlantic Oscillation and interactions between the Westerlies and monsoons, affect such continental regions.Important to the concept of climate change studies are palaeoecological programmes to test models, to improve model parameterisation, and to place these recent trends in climate variability into the perspective of longer time scales. In this context, Lake Baikal, located in southern Central Siberia, is one of the most exciting lakes for climate change research, as shown by successful international scientific efforts during the last 15 years under umbrella programmes such as the Baikal International Centre for Ecological Research (BICER), and the Baikal Drilling Project (Baikal Drilling Project BDP-96 (Leg II) members, 1997; Grachev et al., 1997, 1998; Kuzmin et al., 2001; Kashiwaya, 2003)–ICDP Programme and IGBP PAGES–PANASH initiatives. Previous studies covering glacial–interglacial time scales clearly show the orbital control on the sediment parameters revealing pronounced precession and eccentricity cyclicity (Colman et al., 1995; Williams et al., 1997, Kashi-waya et al., 2001). However, the Lake Baikal sedimentary archive also has the potential to sensitively record climate changes at high temporal resolution (decadal to centennial) over more recent time scales. Despite the intense concern over the environmental and ecological impacts of anthropo-