| 刊名 | Agricultural Biotechnology |
| 作者 | Sangbu ZHUJIE1, Cunjie ZHANG2*, Puchi ZHAXI3, Deji BAIMA1, Lamu NIMA1, Ciwang PINGCUO4 |
| 作者单位 | 1. Nanmulin Meteorological Bureau of Tibet Autonomous Region, Shigatse; 2. National Climate Center, Beijing; 3. Shigatse Agricultural Science Research and Promotion Center, Shigatse; 4. Dingri County Meteorological Bureau of Tibet Autonomous Region, Shigatse |
| DOI | DOI:10.19759/j.cnki.2164-4993.2024.02.012 |
| 年份 | 2024 |
| 刊期 | 2 |
| 页码 | 43-49,63 |
| 关键词 | Tibet; Main production area; Climate; Aridity; Contribution rate |
| 摘要 | Based on the daily meteorological observation data of seven meteorological stations in southern Tibet from 1980 to 2021 (April-October), the temporal and spatial variation characteristics and influencing factors of aridity index (AI) in the growing season of major grain producing areas in Tibet were studied by using climate tendency rate, Mann-Kendal test, Morlet wavelet analysis, GIS hybrid interpolation method, Pearson correlation coefficient, contribution rate analysis and other methods. The results showed that the average AI in the main grain producing areas of Tibet was 1.7, which belonged to the semi-arid area, and the overall trend was decreasing (humidifying) (-0.036/10 a). The linear decreasing trend was different in different regions, and the area around Lhatse County was the most significant (-0.26/10 a). AI had no obvious abrupt change, and had long- and medium-term fluctuation characteristics of 24 years, 6 years. The spatial distribution was uneven, and had the characteristics of ‘shrinking arid area and expanding humid area’. The contribution rates of the main climate influencing factors of AI varied in different regions. In general, the contribution rates after quantification was as follows: precipitation (34.9%)>relative humidity (28.4%)>sunshine (19.9%)>maximum temperature (12.4%). |
