科其喀尔冰川动力变化遥感监测及其对气候变化的响应研究

项目名称： 科其喀尔冰川动力变化遥感监测及其对气候变化的响应研究

项目编号： No.41471067

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 蒋宗立

作者单位： 湖南科技大学

项目金额： 90万元

中文摘要： 冰川流速是冰川动力状况的重要标志，山谷冰川的持续消退导致冰川动力减弱，流速减缓使得冰舌逐渐为表碛所覆盖；山地冰川对气候变化的响应过程受冰川动力控制，冰川运动速度控制冰量输送变化而最终引起冰川形态等变化以适应新的气候条件；表碛覆盖的演化使得冰川动力变化与冰川形态变化关系及对气候变化响应变得复杂，理解这种关系有助于区域气候变化评估与冰川水资源评估。拟申请项目以托木尔峰南坡典型表碛覆盖型冰川-科其喀尔冰川为研究对象，运用遥感与地面观测相结合的方法获取该冰川表面数字高程模型、冰川运动速度、冰川形态及动态变化信息，对其动力特征进行分析；结合冰川流动定律、基于表面运动速度进行冰川厚度估算；在此基础上计算特定横断面冰通量；分析该冰川形态与特定断面冰通量动态变化的关系及对气候变化的响应，可作为冰川对气候变化响应快速评估及进一步研究流域冰川变化及其对流域水资源影响研究的重要手段。

中文关键词： 山地冰川；遥感监测；冰川厚度；冰川形态；冰川气候效应

英文摘要： Glacier flow velocity is an important indicator of glacier dynamics, the tongues of valley glaciers were to be debris-covered due to slowdown flow velocity with the weakening dynamics for continuing retreating of valley glaciers.Response process of mountain glaciers to climate change is mainly controled by glacier dynamics status, The change of glacier flux in specific transect controled by glacier flow velocity leads to the glacier morphology change to adapt to a changed climate conditions.It's the evolution of glacier debris-cover that makes the relationship between galcier dynamics change and surface morpgology change and response to climate change more complicated. Understanding the relationship helps assess the regional climate change and glacier water resources.In the proposal, Koxkar glacier-the big debris-covered glacier is to be selected as object of study.Methods combining remote sensing and field works are to be employed to obtain the glacier surface digital elevation models, surface flow velocities and glacier surface morphologies, and synthesis of these informations to identify the glacier dynamics status is provided.The glacier thickness is to be calculated using glacier flow law based on galcier surface flow velocities; and the glacier flux at the specific transects is estimated based on former calculations.The research will provide a vital resortment to assess regional climate change and glacier water resources by analyzing relationship between galcier morphology and flux and their responses to climate change.

英文关键词： Mountain glacier;monitoring by remote sensing;glacier depth;glacier morphology;glacier response to climate change