| 黄土高原地区植被变化及其对极端气候的响应 |
| 韩丹丹1,3; 穆兴民1,2; 高鹏1,2; 赵广举1,2; 孙文义1,2
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| 2020
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发表期刊 | 水土保持通报
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卷号 | 40期号:2页码:247-254 |
摘要 | [目的]研究黄土高原地区植被变化及其对极端气候的响应,为减缓和应对气候异常提供科学依
据。[方法]基于 1982 — 2017 年遥感影像数据和气象数据,采用趋势分析、相关分析等方法,研究黄土高原
地区植被时空变化及其对极端气候的响应。[结果] 1982 — 2017 年期间,黄土高原 NDVI 以每年 0.37% 的
速率呈显著的增加趋势(
p <0.01 );空间上, NDVI 呈现从西北到东南递增的空间分布格局。极端气候指数
变化中,极端气温指数变化趋势较为一致,即表征极高温事件的极端气温指数呈极显著的增加趋势,表征
极低温事件的指数呈现显著的下降的趋势,而极端降水指数未发生显著变化。 NDVI 年际变化与极端气温
指数 FD 0 , TMAX mean , TMIN mean , TN 10p , TN 90p , TR 20 , SU 25 均呈极显著相关(
p <0.01 );四季 NDVI 变化与
极端降水指数均未表现出明显的相关性,但与极端气温指数显著相关且春季和夏季的相关性高于秋季和
冬季;月尺度上, NDVI 与极端降水指数(
RX 1day , RX 5day )和极端气温指数( TMAX mean , TMIN mean , TN 90p ,
TX x , TN n )呈显著的相关性( p <0.01 )。 NDVI 与极端气温指数 TMAX mean , TN 10p , TN 90p , TX x 前 1 个月的
相关性大于当月、前2个月、前3个月的相关性。[结论]黄土高原地区 NDVI呈显著增加的趋势,年际和
月际 NDVI变化与极端气温指数存在相关性,而与极端降水指数均未表现出明显的相关,且黄土高原地区
的植被覆盖变化对极端气候的响应存在一定的滞后性。 |
其他摘要 | [ Objective ] The dynamic changes of vegetation on the Loess Plateau and its response to extreme
climate were studied , in order to provide scientific basis for mitigating and adapting to climate anomaly.
[ Methods ] Based on the remote sensing data and meteorological date from 1982to 2017 , the study used
Mann - Kendall trend test and correlation analysis method to analyze temporal and spatial changes of vegetation in
Loess Plateau and its response to extreme climate. [ Results ] NDVI exhibited a significant increasing trend
with an annual rate of 0.37% ( p <0.01 ) from 1982to 2017 , and increased from northwest to southeast on
the Loess Plateau.As for the change of extreme climate , the variation trend of extreme temperature was
relatively consistent.The extreme high temperature events showed a significant increasing
trend , and theextreme low temperature events showed an extremely significant downward trend.However , the extreme
precipitation index did not change significantly.The correlation analysis between extreme climate index and
NDVI showed that the interannual variation of NDVI was significantly correlated with extreme temperature
index FD 0 , TMAX mean , TMIN mean , TN 10p , TN 90p , TR 20 and SU25 ( p <0.01 ) .There was no significant
correlation between NDVI changes and extreme precipitation index in all seasons.However , NDVI showed a
significant correlation with extreme temperature index , moreover , the correlation of spring and summer was
higher than that autumn and winter.On the monthly scale , NDVI was significantly
correlated with extreme
precipitation index ( RX 1day , RX 5day ) and extreme temperature index ( TMAX
mean , TMIN mean , TN 90p , TX x , TN n )
(
p <0.01 ) .The correlation between NDVI and extreme temperature index TMAX mean , TN 10p , TN 90p and TX x
a lag
of one month was greater than that current month ,
a lag of two months and a lag
of three months.
[ Conclusion ] The NDVI showed a significant increasing
trend.The interannual and monthly NDVI changes were
correlated with the extreme temperature index , and both showed a significant correlation with the extreme
precipitation index.Moreover , the response of vegetation cover change in the Loess Plateau region to
extreme climate has a certain lag. |
关键词 | 黄土高原地区
NDVI
极端气候指数
相关性
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收录类别 | 中文核心期刊要目总览
|
语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/9944
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.中国科学院 水利部 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室 2.西北农林科技大学 黄土高原土壤侵蚀与旱地农业国家重点实验室 3.中国科学院大学
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推荐引用方式 GB/T 7714 |
韩丹丹,穆兴民,高鹏,等. 黄土高原地区植被变化及其对极端气候的响应[J]. 水土保持通报,2020,40(2):247-254.
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APA |
韩丹丹,穆兴民,高鹏,赵广举,&孙文义.(2020).黄土高原地区植被变化及其对极端气候的响应.水土保持通报,40(2),247-254.
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MLA |
韩丹丹,et al."黄土高原地区植被变化及其对极端气候的响应".水土保持通报 40.2(2020):247-254.
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文件名:
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黄土高原地区植被变化及其对极端气候的响应_韩丹丹.pdf
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Adobe PDF
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