Holocene Glacier Fluctuations in the Peruvian Andes Indicate Northern Climate Linkages
Holocene Glacier Fluctuations in the Peruvian Andes Indicate Northern Climate Linkages
复制标题
秘鲁安第斯山脉全新世冰川波动表明北部气候联系
作者：
J. Licciardi;J. Schaefer;J. Taggart;D. Lund
古气候学中最重要的两个问题是：北半球和南半球的气候是如何联系在一起的？高纬度地区和热带地区在推动和传播气候变化方面扮演着什么角色？过去的调查主要集中在研究大而快速的气候变化，如冰川消融或新仙女木期，因为它们是最容易看到和确定年代的。Licciardi等人（第1677页）通过确定全新世（最近11000年）在秘鲁安第斯山脉形成的冰川冰碛的精确宇宙成因同位素年龄，扩大了这些研究的范围。这些数据的准确性揭示了秘鲁冰川推进与北大西洋地区气候之间的广泛相关性，揭示了热带地区与高纬度地区之间的重要气候联系。全新世秘鲁安第斯山脉南部的冰川推进与北大西洋地区的气候相关。热带在触发、传输和放大半球间气候信号中的作用仍然是古气候学中的一个关键争论。热带冰川波动提供了关于区域古气候趋势和强迫的重要见解，但缺乏可靠的年表。在这里，我们报告了秘鲁南部Cordillera Vilcabamba（13°20'S）的精确冰碛年龄，这些年龄表明了全新世早期和“小冰期”晚期外热带地区突出的冰川事件和相关的气候变化。我们的冰川年表与新西兰的记录不同，但与欧洲年代确定的冰川记录大致相关，表明热带和北大西洋地区之间存在气候联系。
Togetherness Two of the most important questions in paleoclimatology are, how are the climates of the Northern and Southern Hemispheres linked, and what are the roles of the high latitudes and the tropics in driving and transmitting climate changes? Past investigations have concentrated on the study of large, rapid climate changes like deglaciations or the Younger Dryas because they are the easiest ones to see and to date. Licciardi et al. (p. 1677) expand the scope of these investigations by determining precise cosmogenic isotope ages for glacial moraines formed in the Peruvian Andes during the Holocene (the last 11,000 years). The precision of these data reveals a broad correlation between Peruvian glacial advances and climate in the North Atlantic region, revealing important climate linkages between the tropics and higher latitudes. Glacial advances in the southern Peruvian Andes during the Holocene are correlated with the climate of the North Atlantic region. The role of the tropics in triggering, transmitting, and amplifying interhemispheric climate signals remains a key debate in paleoclimatology. Tropical glacier fluctuations provide important insight on regional paleoclimatic trends and forcings, but robust chronologies are scarce. Here, we report precise moraine ages from the Cordillera Vilcabamba (13°20′S) of southern Peru that indicate prominent glacial events and associated climatic shifts in the outer tropics during the early Holocene and late in the “Little Ice Age” period. Our glacier chronologies differ from the New Zealand record but are broadly correlative with well-dated glacial records in Europe, suggesting climate linkages between the tropics and the North Atlantic region.
影响因子：
5.8
作者：
D. Douglass;B. Singer;M. Kaplan;R. P. Ackert;D. Mickelson;M. Caffee
通讯作者：
D. Douglass;B. Singer;M. Kaplan;R. P. Ackert;D. Mickelson;M. Caffee