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| DOI | 10.1175/JHM-D-21-0122.1 |
| Spatiotemporal Patterns of Hydrometeorological Extremes over 1986-2015 in Nepal | |
| Poudel, Arati; Cuo, Lan; Gyawali, Ayush Raj; Li, Ning | |
| 通讯作者 | Cuo, L (通讯作者) |
| 发表日期 | 2022 |
| ISSN | 1525-755X |
| EISSN | 1525-7541 |
| 起始页码 | 573 |
| 结束页码 | 596 |
| 卷号 | 23期号:4 |
| 英文摘要 | To better understand the hydrometeorological mean conditions and changes in Nepal, this study analyzes annual and monthly changes of mean and extreme precipitation indices for 34 stations (1986-2015) and streamflow indices for 19 stations (different available periods ranging from 1962 to 2014). The annual and monthly precipitation-streamflow relations in the major basins of Nepal are also analyzed. Nepal has heterogeneous precipitation spatial patterns in its mean and changes. The spatial pattern of extreme precipitation shows that the dry regions are prone to dry extremes and wet regions are prone to wet extremes during the past three decades. However, the annual precipitation trend is decreasing in general and the monsoon-dominated regions, namely, southern, eastern, and central Nepal, are becoming drier with less intensive precipitation while the western region is getting wetter. The trend of annual precipitation on average is decreasing at the rate of 4.2 mm yr(-1). The risk of drought is increasing in Nepal as 100% of stations show a positive trend of consecutive dry days (CDD) and the all-Nepal trend is 0.8 days yr(-1), which can put stress on the agriculture and health sector. The highest increase in CDD is at Ilam in the eastern hills with 2.9 days yr(-1). The Southeast Asian monsoon index shows a statistically significant 1-month-lagged influence on country-wise precipitation in Nepal. The effect of decreasing precipitation is seen in the streamflow trend as the majority of stations show decreasing runoff in June and July, as opposed to an increase in the winter months. CDD and maximum 1-day (Rx1day) and 5-day (Rx5day) precipitation significantly decrease with elevation. |
| 关键词 | ASIAN SUMMER MONSOONCLIMATE-CHANGEPRECIPITATION EXTREMESTIBETAN PLATEAUSPATIAL-PATTERNSRIVER-BASINSOUTHSTREAMFLOWRAINFALLTRENDS |
| 英文关键词 | Streamflow; Extreme events; Monsoons; Precipitation; Climate change; Hydrometeorology |
| 语种 | 英语 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000798104200005 |
| 来源期刊 | JOURNAL OF HYDROMETEOROLOGY
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/260613 |
| 推荐引用方式 GB/T 7714 | Poudel, Arati,Cuo, Lan,Gyawali, Ayush Raj,et al. Spatiotemporal Patterns of Hydrometeorological Extremes over 1986-2015 in Nepal[J]. 中国科学院青藏高原研究所,2022,23(4). |
| APA | Poudel, Arati,Cuo, Lan,Gyawali, Ayush Raj,&Li, Ning.(2022).Spatiotemporal Patterns of Hydrometeorological Extremes over 1986-2015 in Nepal.JOURNAL OF HYDROMETEOROLOGY,23(4). |
| MLA | Poudel, Arati,et al."Spatiotemporal Patterns of Hydrometeorological Extremes over 1986-2015 in Nepal".JOURNAL OF HYDROMETEOROLOGY 23.4(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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