Controls on high-latitude mountain permafrost distribution and sensitivity to climate change

我的研究计划的目标是研究横跨纬度横断面的不同高纬度山脉，以评估地表逆温(随海拔变暖的非典型模式)的频率和强度的变化可能如何影响加拿大西北部变暖气候中的永久冻土分布。此外，我的计划旨在检验海拔依赖变暖(EDW)的假说，这是一个概念模型，该模型表明，相对于邻近的低海拔环境，未来的变暖速度预计在高海拔地区被放大。这项计划将涉及五个HQP的培训，重点是一个框架，以测试高纬度山区永久冻土的融化不会遵循典型的海拔或纬度梯度的概念，而是与当地的气候、地貌和植被联系在一起，导致不同的融化模式。我的计划希望调整EDW假说，以便更好地涵盖加拿大各地多变的山区环境。方法旨在利用野外、地理建模和数据分析技术相结合的方法，在两个广阔的山区，包括高度大陆的麦肯齐山脉和高纬度的奥格尔维山脉。我的计划重点是使用气象站和数据记录仪在这些地点独立收集数据，这些数据记录器沿着海拔和纬度横断面布置，检查树木存在、与太阳辐射有关的山谷结构和大陆性的影响。将这些数据与再分析气候数据和气候预测相结合，总的目标将是评估地形温度场的重塑，并衡量这种重塑将如何影响融化的空间分布和与永久冻土有关的危险的可能性。

The goal of my research program is to examine dissimilar high-latitude mountains across a latitudinal transect to assess how changes to surface inversion (the atypical pattern of warming with elevation) frequency and magnitude may impact permafrost distribution in the warming climate of northwestern Canada. Additionally, my program aims to examine the hypothesis of elevation dependent warming (EDW), a conceptual model suggesting that the rate of future warming is expected to be amplified at high elevation relative to adjacent low elevation environments. This program will involve the training of five HQP focused on a framework to test the concept that thawing of high-latitude mountain permafrost will not follow a typical elevation or latitudinal gradient, but will rather be linked to local climate, geomorphology and vegetation, resulting in a heterogeneous pattern of thaw. My program looks to adjust the EDW hypothesis in order to be more inclusive of variable mountainous environments across Canada. Methods aim to utilize a combination of field, geomatic modelling and data analysis techniques within two broad mountainous regions including the highly continental Mackenzie Mountains and the high-latitude Ogilvie Mountains. My program focuses on the independent gathering of data in these sites using weather stations and data loggers arranged along elevational and latitudinal transects examining the impact of tree presence, valley structure relating to solar radiation, and continentality. Amalgamating these data with both reanalysis climate data and climate projections, the overall objective will be to assess the reshaping of the topo-temperature field and gauge how this reshaping will impact the spatial distribution of thaw and the potential for permafrost-related hazards.