地理科学 ›› 2020, Vol. 40 ›› Issue (12): 2105-2114.doi: 10.13249/j.cnki.sgs.2020.12.017
李明1,2(), 葛晨昊1, 邓宇莹1, 王贵文1,*(
), 柴旭荣1
收稿日期:
2020-04-03
修回日期:
2020-07-14
出版日期:
2020-12-25
发布日期:
2021-01-09
通讯作者:
王贵文
E-mail:lim489@163.com;gwwang80@163.com
作者简介:
李明(1982−),男,河南商丘人,副教授,主要从事区域气候变化方面的研究。E-mail:
Li Ming1,2(), Ge Chenhao1, Deng Yuying1, Wang Guiwen1,*(
), Chai Xurong1
Received:
2020-04-03
Revised:
2020-07-14
Online:
2020-12-25
Published:
2021-01-09
Contact:
Wang Guiwen
E-mail:lim489@163.com;gwwang80@163.com
摘要:
选择标准化降水指数(SPI)和植被状态指数(VCI)分别作为评价黄土高原气象干旱和农业干旱的指标,使用干旱频率和Sen斜率分析了黄土高原地区干旱的分布特征与变化趋势,并探讨了气象干旱与农业干旱的相关性。结果表明:① 黄土高原西部干旱频率总体上高于东部。气象干旱和农业干旱变化趋势在空间上表现有所不同,黄土高原西部、北部气象干旱呈不显著减缓趋势,东部和南部呈不显著加重趋势,但绝大部分地区的农业干旱呈减缓趋势,尤其是400 mm等降水量一线两侧区域。② 季节上,黄土高原夏季和秋季气象干旱频率较高,春季和冬季气象干旱频率相对较低。黄土高原农业干旱频率春季最高,夏季其次,VCI对农业干旱实时监测的适用性更强。③ 不同季节,农业干旱滞后气象干旱的时间长短不同,冬季滞后约2个月,春季滞后约1个月,夏季和秋季滞后少于1个月。黄土高原一熟制种植区的SPI-12值与VCI值具有较好的正相关性。研究结果可以为黄土高原的干旱监测和预警、干旱区划以及干旱灾害风险评估提供科学依据。
中图分类号:
李明, 葛晨昊, 邓宇莹, 王贵文, 柴旭荣. 黄土高原气象干旱和农业干旱特征及其相互关系研究[J]. 地理科学, 2020, 40(12): 2105-2114.
Li Ming, Ge Chenhao, Deng Yuying, Wang Guiwen, Chai Xurong. Meteorological and Agricultural Drought Characteristics and Their Relationship Across the Loess Plateau[J]. SCIENTIA GEOGRAPHICA SINICA, 2020, 40(12): 2105-2114.
Table 2
The average correlation coefficient between SPI-12 and VCI in the Loess Plateau"
月份 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
注:平均相关系数为黄土高原所有像元相关系数的平均值。 | ||||||||||||
SPI-12与当月VCI | 0.17 | 0.18 | 0.28 | 0.34 | 0.37 | 0.43 | 0.45 | 0.41 | 0.28 | 0.23 | 0.18 | 0.16 |
SPI-12与滞后1个月VCI | 0.17 | 0.28 | 0.36 | 0.33 | 0.37 | 0.35 | 0.40 | 0.33 | 0.23 | 0.21 | 0.16 | 0.17 |
SPI-12与滞后2个月VCI | 0.28 | 0.35 | 0.34 | 0.31 | 0.25 | 0.25 | 0.27 | 0.23 | 0.24 | 0.20 | 0.18 | 0.18 |
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