大凌河流域1998～2019年NDVI时空变化及其对气温和降水的响应

江山; 石绍山; 郭常来; 冯雨林; 孙家全; 孙秀波; 周丽

doi:10.12401/j.nwg.2022026

大凌河流域1998～2019年NDVI时空变化及其对气温和降水的响应

中国地质调查局沈阳地质调查中心，辽宁沈阳　110034

基金项目: 中国地质调查局项目“东北振兴区资源环境承载能力监测”（DD20221730），“东北地区自然资源综合调查”（DD20211383）联合资助

详细信息

作者简介: 江山（1985−），男，硕士，高级工程师，从事遥感地质调查工作。E−mail：jiangshan85@qq.com

通讯作者: 周丽（1984−），女，硕士，从事期刊编辑、科技英语翻译等工作。E−mail：270428690@qq.com

中图分类号: P407.8；X87

收稿日期: 2022-06-06

修回日期: 2022-08-05

录用日期: 2022-09-22

刊出日期: 2023-08-20

NDVI Changes of the Daling River Basin in Growing Seasons During 1998～2019 and Its Correlation with Temperature and Precipitation

Shenyang Center of China Geological Survey, Shenyang 110034, Liaoning, China

More Information

Corresponding author: ZHOU Li, 270428690@qq.com

Received Date: 06 June 2022

Revised Date: 05 August 2022

Accepted Date: 22 September 2022

Publish Date: 20 August 2023

摘要

摘要:
利用9个国家气象站数据和1998～2019年SPOT/VEGETATION NDVI数据，运用趋势分析、偏相关分析和复相关分析方法，研究大凌河流域22年来NDVI时空演变规律及其与气温和降水之间的关系。研究发现：①研究区22年来植被覆盖整体变好，90.8%的区域NDVI呈增加趋势，不同季节变化趋势各异，夏季NDVI增长率最高，春季最低。②大凌河上游地区NDVI总体呈缓慢稳定增长状态，中下游地区增长与减退并存；③研究区NDVI总体与气温呈负相关、与降水量呈正相关，且NDVI与年降水量关系更密切。④研究区植被覆盖降水驱动型占总面积的4.33%，气温驱动型占比为0.03%，降水、气温共同驱动型占比为2.73%。
- 大凌河流域 /
- NDVI /
- 时空变化 /
- 气候因子 /
- 相关分析 /
- 东北地区
Abstract:
Based on the data of 9 national meteorological stations and SPOT/VEGETATION NDVI data from 1998 to 2019, In this paper, trend analysis, partial correlation analysis and complex correlation analysis were used to study the temporal and spatial evolution of NDVI and its relationship with air temperature and precipitation in the Daling river basin in the past 22 years, and the following conclusions were drawn:① The overall vegetation coverage in the study area improved in the past 22 years, and NDVI increased in 90.8% of the area, with different trends in different seasons. The growth rate of NDVI was the highest in summer and the lowest in spring. ② In the upper reaches of Daling River, NDVI increased slowly and steadily, while in the middle and lower reaches, NDVI increased and decreased simultaneously. ③ In the study area, NDVI was negatively correlated with air temperature but positively correlated with precipitation, and the relationship between NDVI and annual precipitation was closer. ④ In the study area, 4.33% of the total area was driven by precipitation, 0.03% by air temperature, and 2.73% by precipitation and air temperature.
- Daling river basin /
- NDVI /
- space–time change /
- climate factor /
- correlation analysis /
- Northeast China

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图 1 大凌河流域地理位置图

Figure 1.

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图 2 1998～2019年大凌河流域生长季NDVI值变化趋势图

Figure 2.

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图 3 1998～2019年大凌河流域NDVI值按季节变化趋势图

Figure 3.

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图 4 大凌河流域1998～2019年逐像元NDVI值变化趋势图

Figure 4.

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图 5 大凌河流域1998～2019年逐像元NDVI值变化趋势的显著性图

Figure 5.

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图 6 大凌河流域生长季NDVI与气温的偏相关关系图

Figure 6.

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图 7 大凌河流域生长季NDVI与降水量的偏相关关系图

Figure 7.

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图 8 生长季NDVI气温、降水量的复相关系数（a）与不同驱动因子分区图（b）

Figure 8.

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表 1 大凌河流域1998～2019年间NDVI变化趋势表

Table 1. NDVI variation trend in Daling river basin from 1998 to 2019

变化率	春季（%）	夏季（%）	秋季（%）	生长季（%）
＜−0.001	18.5	4.2	6.2	4.8
−0.001～0	6.4	1.2	2.8	2.6
0～0.001	8.1	2.8	5.4	5.8
0.001～0.003	14.3	6.2	16.0	16.3
0.003～0.005	14.8	15.4	25.0	23.7
＞0.005	37.9	70.3	44.7	46.8

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表 2 大凌河流域1998～2019年间NDVI变化的显著性表

Table 2. Significance of NDVI change in Daling rver basin from 1998 to 2019

变化显著性	春季（%）	夏季（%）	秋季（%）	生长季（%）
极显著降低	18.2	3.1	6.6	4.3
显著降低	3.3	0.7	0.8	0.1
不显著降低	4.1	2.1	2.1	4.8
不显著增加	33.3	76.9	31.0	71.2
显著增加	12.6	7.5	19.3	1.6
极显著增加	28.6	9.8	40.2	18.0

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表 3 大凌河流域植被覆盖驱动分区规则表

Table 3. Vegetation cover driving zoning criteria in the Daling river basin

NDVI变化类型	分区准则			面积占比（%）
NDVI变化类型	r_{NDVI P,T}	r_{NDVI T,P}	R_NDVI,TP	面积占比（%）
降水驱动型	t＞t_0.01		F＞F_0.05	4.33
气温驱动型		t＞t_0.01	F＞F_0.05	0.03
气温、降水驱动型	t＜t_0.01	t＜t_0.01	F＞F_0.05	2.73
其他因子驱动型			F＜F_0.05	92.91
注：表中r_NDVIP,T、r_NDVIT,P分别为NDVI与降水、气温的偏相关系数，R_NDVI,TP则表示NDVI与气温和降水的复相关系数，t和F分别为t、F检验的统计量，t_0.01表示t检验的0.01显著性水平，F_0.05表示F检验的0.05显著性水平。

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