Analyses of Ice Core Data from Various Sites in Svalbard Glaciers from 1987 to 1999

For the purpose of clarification of the climate and environmental changes for the past 100 years in the Arctic, the Japanese Arctic Glaciological Expedition (JAGE) conducted a large number of ice corings on a number of glaciers from 1987 to 1999 (Watanabe and Fujii, 1988, 1990; Watanabe et al, 1993, 2000; Watanabe, 1996; Kamiyama et al, 2001; Motoyama et ai, 2001). Ice core data from seven ice coring sites in Svalbard are compiled and reported here. There were ice core data of 85.6 m at Hoghetta Ice Dome in 1987, 83.9 m and 24.4 m at Snofjellafonna in 1992, 185 m and 41 m at Asgardfonna in 1993, 10 m at Br0ggerbreen in 1994, 211 m at Vestfonna in 1995, 118 m at Austfonna in 1998, 289 m at Austfonna in 1999. The drilling sites are shown in Fig. 1. The characteristics of drilling sites are summarized in Table 1. The tabulated items are the latitude, longitude, altitude, ice core drilling depth, glacier temperature at 10 m depth, and average ice density from surface to 10 m depth and from 10 m to 20 m depth, respectively.为厘清北极地区过去百年的气候与环境变化，日本北极冰川学考察队（Japanese Arctic Glaciological Expedition, JAGE）于1987年至1999年间在多座冰川开展了大量冰芯（ice core）钻探工作（Watanabe与Fujii，1988、1990；Watanabe等，1993、2000；Watanabe，1996；Kamiyama等，2001；Motoyama等，2001）。 本文汇编并报道了斯瓦尔巴（Svalbard）7个冰芯钻探点位的冰芯数据：1987年于霍赫塔冰穹（Hoghetta Ice Dome）获取的85.6米冰芯、1992年于斯诺菲耶拉福纳冰原（Snofjellafonna）获取的83.9米与24.4米冰芯、1993年于阿斯加德福纳冰原（Asgardfonna）获取的185米与41米冰芯、1994年于布罗格布雷恩冰川（Brøggerbreen）获取的10米冰芯、1995年于韦斯特福纳冰原（Vestfonna）获取的211米冰芯、1998年于奥斯特福纳冰原（Austfonna）获取的118米冰芯，以及1999年于奥斯特福纳冰原获取的289米冰芯。钻探点位分布见图1。各钻探点位的特征汇总于表1，制表项依次为纬度、经度、海拔、冰芯钻探深度、10米深度处的冰川温度，以及表层至10米、10米至20米深度的平均冰密度。