气候变化领域集成服务门户(CCPortal): Compilation of stable isotope data from East Antarctic snow pits and firn cores

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.883787
	Compilation of stable isotope data from East Antarctic snow pits and firn cores
	Laepple; Thomas; Münch; Thomas; Casado; Mathieu; Hörhold; Maria; Landais; Amaelle; Kipfstuhl; Sepp
发布日期	2017-12-05
数据集类型	dataset
英文简介	Stable water isotopes in polar ice provide a wealth of information about past climate evolution. Snow-pit studies allow us to relate observed weather and climate conditions to the measured isotope variations in the snow. They therefore offer the possibility to test our understanding of how isotope signals are formed and stored in firn and ice. As stable water isotopes in the snowfall are strongly correlated to air temperature, isotopes in the near-surface snow are thought to record the seasonal cycle at a given site. Accordingly, the number of seasonal cycles observed over a given depth should depend on the accumulation rate of snow. However, snow-pit studies from different accumulation conditions in East Antarctica reported similar isotopic variability and comparable apparent cycles in the d18 O and dD profiles with typical wavelengths of ~ 20cm. These observations are unexpected as the accumulation rates strongly differ between the sites, ranging from 20 to 80mm w.e. yr -1 (~ 6-21cm of snow per year). Various mechanism have been proposed to explain the isotopic variations individually at each site; however, none of these is consistent with the similarity of the different profiles independent of the local accumulation conditions.
空间范围	Median Latitude: -75.004905 * Median Longitude: 0.073845 * South-bound Latitude: -75.009110 * West-bound Longitude: 0.067900 * North-bound Latitude: -75.000700 * East-bound Longitude: 0.079790
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215281
推荐引用方式 GB/T 7714	Laepple,Thomas,Münch,et al. Compilation of stable isotope data from East Antarctic snow pits and firn cores.2017-12-05.https://doi.org/10.1594/PANGAEA.883787.