气候变化领域集成服务门户(CCPortal): Water stable isotope record of ice core WAIS divide

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.886046
	Water stable isotope record of ice core WAIS divide
	Steig; Eric J; Ding; Quinghua; White; James W C; Küttel; Meinrad; Rupper; Summer B; Neumann; T A; Neff; Peter D; Gallant; Ailie J E; Mayewski; Paul Andrew; Taylor; Kendrick C; Hoffmann; Georg; Dixon; Daniel A; Schoenemann; Spruce W; Markle; Bradley R; Fudge; Tyler J; Schneider; David P; Schauer; Andrew J; Teel; Rebecca P; Vaughn; Bruce H; Burgener; Landon; Williams; Jessica; Korotkikh; Elena; Gkinis; Vasileios
发布日期	2018-02-07
数据集类型	dataset
英文简介	Changes in atmospheric circulation over the past five decades have enhanced the wind-driven inflow of warm ocean water onto the Antarctic continental shelf, where it melts ice shelves from below. Atmospheric circulation changes have also caused rapid warming over the West Antarctic Ice Sheet, and contributed to declining sea-ice cover in the adjacent Amundsen-Bellingshausen seas. It is unknown whether these changes are part of a longer-term trend. Here, we use water-isotope (d18O) data from an array of ice-core records to place recent West Antarctic climate changes in the context of the past two millennia. We find that the d18O of West Antarctic precipitation has increased significantly in the past 50 years, in parallel with the trend in temperature, and was probably more elevated during the 1990s than at any other time during the past 200 years. However, d18O anomalies comparable to those of recent decades occur about 1% of the time over the past 2,000 years. General circulation model simulations suggest that recent trends in d18O and climate in West Antarctica cannot be distinguished from decadal variability that originates in the tropics. We conclude that the uncertain trajectory of tropical climate variability represents a significant source of uncertainty in projections of West Antarctic climate and ice-sheet change.
空间范围	Latitude: -79.468000 * Longitude: 12.086000
语种	英语
国家	国际
学科大类	气候变化
学科子类	冰冻圈
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/213712
推荐引用方式 GB/T 7714	Steig,Eric J,Ding,et al. Water stable isotope record of ice core WAIS divide.2018-02-07.https://doi.org/10.1594/PANGAEA.886046.