Glacier Mass-Balance Variation in China during the Past Half Century
| Autor: | Muhammad Naveed Anjum, Yousif Elnour Yagoub, Ahmed A. H. Siddig, Omer Said Musa, Zhongqin Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Journal of Geoscience and Environment Protection. :37-58 |
| ISSN: | 2327-4344 2327-4336 |
| DOI: | 10.4236/gep.2018.65004 |
| Popis: | The aim of this study is to investigate the impact of temperature trend on glacier-mass balance, snow density, snowmelt, snow depth and runoff by using observations of nine glacier stations that covered most of the China over the period of 1979-2013. Trend analysis showed an increasing trend of temperature on all of the selected stations. On an average, temperature (?C) was increasing at the rate of 0.46/10a. The increasing trend of temperature showed a negative relationship with annual glacier-mass balance on most of the stations and caused a decrease in annual balance. Results of Pearson’s correlation analysis showed a highly significant negative correlation between temperature and snow density (correlation coefficient (CC = ?0.661 at 0.01 significance level). There was a significant positive correlation between temperature and snowmelt (CC = 0.532 at 0.01 significance level). There was a significant negative correlation between temperature and snow depth (corre-lation coefficient (CC = ?0.342 at 0.05 significance level). Moreover, there was a significant positive correlation between temperature and runoff (CC = 0.586 at 0.01 significance level). Increasing trend of temperature caused an increasing trend of annual snowmelt and runoff anomaly% at the rate of 24.82/10a and 9.87/10a, respectively. On the other hand, a declining trend in annual snow density and snow depth anomaly% was found at a rate of ?5.32/10a and ?1.93/10a, respectively. We concluded that the snow density, snowmelt and runoff are significantly sensitive to temperature in China. This contribution has provided information for further understanding of glacier variation and its influencing factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|