Tropical Glaciers and Climate

这是EAR 8317722的更新。 该项目涉及到 热带冰川及其对气候强迫的响应 借鉴 十多年来，在世界各地的高山地区， 未来几年的研究将集中在 肯尼亚山的冰川，以及在较小程度上， 秘鲁的科迪勒拉布兰卡。 到1990年要完成的一项主要任务是绘制所有 以l：5000的比例绘制肯尼亚的冰川。 与1963年的 绘制这张地图将记录过去一个季度的冰川变化 世纪，并作为控制最近和未来的测量 末端变异 这项任务需要建立控制 1987- 1989年期间通过地面调查和空中调查获得的点 1989- 1990年的摄影测量。 应重新绘制刘易斯冰川的地图， 1990年3月基准面，比例尺为1：2，500。 的意见 刘易斯上的预沉淀、净平衡和冰流速 冰川将继续。 这些构成了定量分析的基础。 根据质量和 热预算 此外，十年之久的净余额记录沿着 基岩和表面地形评估以及冰流测量 将作为预测冰的空间模式的输入， 冰流变薄变慢 验证这些预测 是对热带雨林的一个严格的考验 气候与冰冻圈的关系

This is a renewal of EAR8317722. The project is concerned with tropical glaciers and their reponse to climatic forcing. Drawing on more than a decade's work in various high mountain regions of the tropics, research over the next few years will concentrate on the glaciers of Mount Kenya, and to a lesser extent on the ice masses of Peru's Cordillera Blanca. A major task to be accomplished by 1990 is the mapping of all of Mount Kenya's glaciers at scale l:5,000. In conjunction with a 1963 mapping this will document the glacier changes over the past quarter century and serve as control for recent and future measurements of terminus variations. This task entails the establishement of control points through ground surveys during 1987-89, and airborne photogrammetry in 1989-90. The Lewis Glacier shall be re-mapped for the March 1990 datum at scale 1:2,500. The observations of preceipitation, net balance, and ice flow velocity on the Lewis Glacier will continue. These form the basis for the quantitative formulation of forcing-response relationships in terms of the mass and heat budgets. Also, the decade-long net balance record along with the assessments of bedrock and surface topography and ice flow measurements will serve as input for predictions of the spatial pattern of ice thinning and slowdown of the ice flow. Verification of these forecasts represents a stringent test for an understanding of tropical climate-cryosphere relationships.