| 林婧婧,赵冠男.1961—2015年甘肃省伏旱时空分布特征及影响分析[J].干旱地区农业研究,2017,35(6):272~276 |
| 1961—2015年甘肃省伏旱时空分布特征及影响分析 |
| Analysis on space-time distribution characteristic and influence of summer drought in Gansu Province during 1961—2015 |
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| DOI：10.7606/j.issn.1000-7601.2017.06.39 |
| 中文关键词: 伏旱 发生频率 时间动态 空间分布 甘肃省 |
| 英文关键词:summer drought the frequency time dynamic the spatial distribution Gansu Province |
| 基金项目:国家重点基础研究发展计划(973计划)(2013CB430206-6)；甘肃省青年科技基金(17JR5RA342) |
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| 中文摘要: |
| 利用甘肃省80个气象观测站1961—2015年伏期（7—8月）历年降水资料对伏旱发生的频率、范围和年代际变化的统计分析表明：河西走廊伏旱频率为30%～55%，是甘肃省频率最高的区域，其次为陇中北部、陇东和陇南，陇中南部和甘南伏旱发生频率最小，为20%～30%。近55 a甘肃全省和河东伏旱频率的增加趋势为3.7%～5.7%；伏旱发生范围在1961—1985年期间呈9.6%·10a-1的缩小趋势，而在1986—2015年期间呈0.2%·10a-1的扩大趋势；自20世纪80年代以来伏旱强度大于中伏旱的年份共有7 a。伏旱导致了1985—2015年甘肃省农作物受灾面积呈1.1%·10a-1的增加趋势。 |
| 英文摘要: |
| The frequency and the range of yearly summer drought were calculated based on the data of precipitation in spring season (July to August) of 1961—2015 from the 80 meteorological observations in Gansu. A statistical analysis of drought frequency, scope and decadal variability, the following results have been obtained: The frequency of summer drought in Hexi corridor was highest area from 30% to 55%. In the north of Longzhong, Longdong and Longnan regions, the frequency were higher. In the south of Longzhong and Gannan, the frequencies were minimal from 20% to 30%. In Gansu Province, Hexi corridor and Hedong, the frequency of summer drought showed little increasing trend from 3.7% to 5.7%. The range of summer drought showed 0.2% per ten years gradually narrowing from 1961 to 1995, and then expanded trend from 1996 to 2015. There were seven years which drought intensity is greater than moderate drought. Summer drought caused the crops and 1.1% per ten years enlarged the drought-affected area in Gansu Province in 1985 to 2015. |
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