冰川物质平衡的一种简单数学表述法

A Simple Method on Estimating Glacial Mass Balance

It has been mathematically proved that mean gross accumulation or ablation in a whole glacier is equal to that at equilibrium line as the glacier is in zero balance. On the basis of this result, the relationship is discussed between the gross accumulation in a whole glacier and that at the equilibrium line undr general circumstances. When a glacial mass balance (B) is negative, its mean gross ablation (A) is greater than that (AH) at the equilibrium line. When B is positive, A is smaller than AH. According to the mentioned results, a new conception of "relative mass balance" that can be estimated by difference between A and AH was advanced. Glacial mass balance and relative mass balance are of the same significance in a judgement of profit and loss of mass on a glacier. Lastly, a method to calculate relative mass balance was put forward through examples. By this work information on glacial mass balance that must be obtained from long time measurement could be got only from climatic element which is just mean summer air temperature ( June to August) obtained from meteorological stations.