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| 近53年河南省初终霜日期时空变化及其对气候变化的响应 |
| Temporal and Spatial Variations of the First and Last Frost Date During 1961-2013 in Henan Province and Their Responses to Climate Changes |
| 投稿时间：2015-03-03 |
| DOI：10.13254/j.jare.2015.0049 |
| 中文关键词: 日最低0 cm地温 初、终霜日期 时空变化 敏感度 气候变化 |
| 英文关键词: daily minimum ground temperature first and last frost date spatial and temporal variation sensitivity climate change |
| 基金项目:国家自然科学基金项目(41501051,41101549,41271124);全球变化研究国家重大科学研究计划项目(2010CB950101);中国科学院战略性先导科技专项项目(XDA05090101,XDA05090104);科技基础性工作专项项目(2011FY120300);信阳师范学院博士科研启动基金(0201403);教育部人文社科项目(14YJCZH028);2014教育厅人文社科项目(2014-ZC-026);2013年度信阳师范学院校青年基金项目(2013-QN-070) |
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| 中文摘要: |
| 利用1961-2013年河南省17个监测站均一化的逐日地面0 cm最低气温资料,根据霜冻气候指标计算了各站逐年的初、终霜日期,在此基础上分析了河南省初、终霜日期的时空变化特征,并探讨了初、终霜日期的变化对气候变化的敏感程度。结果表明:近53年来,河南省平均初霜日期以2.2 d·10 a-1的速率显著推迟(P<0.01),推迟最为明显的地区位于河南西部山区;平均终霜日期以2.3 d·10 a-1的速率显著提前(P<0.01),中、南部平原地区提前最为明显;河南省初、终霜日期的变化对季节性气温变化十分敏感,秋季气温每升高1 ℃,初霜日期推迟6.5 d;2-4月平均气温每升高1 ℃,终霜日提前3.5 d,相比较而言,初霜日期的变化对气候变化更为敏感。 |
| 英文摘要: |
| In this study, the annual first and last frost date for each station was defined on the basis of daily minimum ground temperature at 17 meteorological stations over the period from 1961 to 2013 in Henan Province. The spatial and temporal changes of first and last frost date, as well as their responses to seasonal temperature variations, were analyzed. The results showed that: The regional mean first frost date showed a significantly delaying trend, with a linear trend of 2.2 d·10 a-1 during the most recent 53 years. The strongest delaying regions occurred in western mountain areas, with the maximum value in Lushi(4.0 d·10 a-1). However, the regional mean last frost date indicated a notably advancing trend, with a linear trend of 2.3 d·10 a-1 over the period from 1961 to 2013. The greatest advancing regions were detected in central and southern Henan, with the maximum value in Zhumadian(4.9 d·10 a-1). The regional mean first and last frost dates were significantly correlated with seasonal mean temperatures. The regression coefficient between first (last) frost date and seasonal mean temperature was 6.5 d·℃-1(-3.5 d·℃-1), representing that the first(last) frost day was delayed(advanced) by 6.5(3.5) days if spring temperature (mean temperature of February, March, and April) increased by 1.0 ℃, suggesting that the first frost date was more sensitive to climate change than last frost date in the context of global warming background. |
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