Global Glacier Mass Balance Synthesis

建议对冰川物质平衡数据进行全球综合，其中包括对测得的物质平衡数据进行评价和数字化。 质量平衡数据集将包括三个数据库：所有测得的高山和副极地冰川的年度特定质量平衡; II.年积累（或冬季平衡）和年消融（或夏季平衡）; III.冬季、夏季和全年的物质平衡梯度将随海拔的升高而变化。 将以几种方式分析这些数据：对半球和全球的个别冰川、山脉和国家进行时空统计分析;分析年度波动和确定长期质量平衡趋势;分析质量平衡梯度变化。 主要工作包括：（1）收集和核对1945年以来所有实测冰川的年比物质平衡数据。 (2)确定冰川变化对海平面的影响，例如，不同冰川区对海平面变化的影响有多大？ (3)估计冬季和夏季平衡（或年积累和消融）的变化及其对不同地理位置的年质量平衡的影响。 (4)确定不同山区物质平衡变化的主要原因。 (5)分析物质平衡梯度（活动指数）及其与气候变化的关系。 这项研究的最终产品将包括三套质量平衡数据，这些数据将在研究所以社区可以获得的形式制作，以及数据报告“高山和次极地冰川的质量平衡：数据和综合”，该报告将由博尔德的科罗拉多大学世界数据中心A冰川学出版。

A global synthesis of glacier mass balance data is proposed, which will include an evaluation and digitization of measured mass balance data . The mass balance data set will include three databases: I. annual specific mass balances of all measured mountain and subpolar glaciers; II. annual accumulation (or winter balance) and annual ablation (or summer balance); III. winter, summer and annual mass balance gradients will altitude. These data will be analyzed in several ways: statistical spatio-temporal analyses of individual glaciers, mountain ranges and countries, both hemispheric and global; analyses of annual fluctuations and determination of long-term mass-balance trends; and analyses of mass balance gradient changes. The main tasks include: (1) Assemble and check the annual specific mass balance data of all measured glaciers since 1945. (2) Determine the contribution of glacier changes to sea level, e.g., how much do different glacier regions contribute to sea-level change? (3) Estimate the variability of winter and summer balances (or annual accumulation and ablation) and their impact on annual mass balances in different geographical locations. (4) Determine the main causes for mass balance changes in different mountain regions. (5) Analyze mass balance gradients (activity indices) and their changes in connection with climate change. The end products of this research will include three mass balance data sets which will be produced at INSTAAR in a form accessible by the community, and the data report, "Mass balance of mountain and subpolar glaciers: data and syntheses" which will be published by World Data Center A Glaciology, University of Colorado, Boulder.