STUDIES ON EFFECTS OF THE ARCTIC CRYOSPHERE ON GLOBAL CHANGE

北极冰圈对全球变化影响的研究

• 批准号: 10041130
• 负责人: WATANABE Okitsugu
• 金额: $ 8.83万
• 依托单位: National Institute of Polar Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10041130/
• 关键词: GLOBAL CHANGE; ARCTIC CRYOSPHERE; ICE CORE; REGIONAL SNOW CHARACTERISTICS

1. A 289m deep ice core was drilled on Austfonna, Svalbard under the collaboration with Norway and France. The core was analyzed for ECM, stable oxygen isotope, and ions. The core records the climatic and environmental changes over the past 700 years. Stable isotope variations indicate that there was a cold period from 1780 to 1920 in Svalbard, and that rapid warming took place in 1920s. On the other hand, ECM analyses show the signals of global scale volcanic eruptions such as Laki and Hekla.2. Drill test and glaciological observations were carried out on Devon Ice Cap, Canadian Arctic under the collaboration with the Geological Survey of Canada. Samples from multiple snow pits on Devon Ice Cap were analyzed for ions. The results show that concentrations of sea salts, formic acid, and calcium decrease rapidly with altitude, and that concentration of MSA does not depend on altitude.3. Under the collaboration with Hunan Normal University, China, sruface snow samples were collected on a glacier in the East Kunlun Mountains. The samples were brought back to Japan and analyzed for chemistry.

1.在挪威和法国的合作下，在斯瓦尔巴特群岛的Austfonna钻取了289米深的冰芯。对岩心进行了ECM、稳定氧同位素和离子分析。岩芯记录了过去700年来的气候和环境变化。稳定同位素变化表明，1780~1920年斯瓦尔巴特群岛经历了一个寒冷期，20世纪20年代迅速变暖。另一方面，ECM分析显示了全球规模的火山爆发，如拉基和赫克拉的信号。与加拿大地质调查局合作，在加拿大北极地区的德文郡冰帽进行了钻探试验和冰川学观测。从德文郡冰帽上的多个雪坑中采集的样品进行了离子分析。结果表明，海盐、甲酸和钙的浓度随海拔高度的升高而迅速降低，而MSA的浓度与海拔高度无关.在与中国湖南师范大学的合作下，在东昆仑山的一个冰川上收集了表面雪样本。这些样本被带回日本进行化学分析。

项目成果

S.J.,Johnsen: "The delta 180 record alomg the Greenland Ice Core and the problem of possible Eamian climatic instability"J.Geophys,Res.. C12. 26397-26410 (1997)

S.J.,Johnsen：“格陵兰冰芯的 Delta 180 记录以及可能的 Eamian 气候不稳定问题”J.Geophys,Res..C12。

Y.Iizuka: "Re-distribution of chemical compositions in the snowpack at the dome of Austfonna ice cap, Svalbard"Seppyo. 62. 245-254 (2000)

Y.Iizuka：“斯瓦尔巴群岛 Austfonna 冰盖圆顶积雪中化学成分的重新分布”Seppyo。

T.Shiraiwa: "Stratigraphic features of firn as proxy climate signals at the summit ice cap of Ushkovsky Volcano,Kamchatka,Russia."Arctic and Alpine Res.. 29. 414-421 (1997)

T.Shiraiwa：“俄罗斯堪察加乌什科夫斯基火山山顶冰盖的冷杉地层特征作为代理气候信号。”Arctic and Alpine Res.. 29. 414-421 (1997)

D.A.Fisher: "Penny Ice Cap cores,Baffin Island,Canada and the Wisconsinan Foxe Dome Connection-two states of Hudson Bay ice cover."Science. 279. 692-695 (1998)

D.A.Fisher：“加拿大巴芬岛的便士冰帽核心和威斯康星州福克斯圆顶连接线 - 哈德逊湾冰盖的两个州。”科学。

O.Castelnau: "Anisotropic behavior of Greenland Ice Core Project ices and flow in Central Greenland"Earth.Planet.Sci.Lett.. 154. 307-322 (1998)

O.Castelnau：“格陵兰冰芯项目冰和格陵兰岛中部流动的各向异性行为”Earth.Planet.Sci.Lett.. 154. 307-322 (1998)