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基于SPOT-VGT数据的湖南省植被变化及其对气候变化的响应

刘正才 屈瑶瑶

刘正才, 屈瑶瑶. 基于SPOT-VGT数据的湖南省植被变化及其对气候变化的响应[J]. 北京林业大学学报, 2019, 41(2): 80-87. doi: 10.13332/j.1000-1522.20180278
引用本文: 刘正才, 屈瑶瑶. 基于SPOT-VGT数据的湖南省植被变化及其对气候变化的响应[J]. 北京林业大学学报, 2019, 41(2): 80-87. doi: 10.13332/j.1000-1522.20180278
Liu Zhengcai, Qu Yaoyao. Vegetation change and its response to climate change based on SPOT-VGT in Hunan Province of southern China[J]. Journal of Beijing Forestry University, 2019, 41(2): 80-87. doi: 10.13332/j.1000-1522.20180278
Citation: Liu Zhengcai, Qu Yaoyao. Vegetation change and its response to climate change based on SPOT-VGT in Hunan Province of southern China[J]. Journal of Beijing Forestry University, 2019, 41(2): 80-87. doi: 10.13332/j.1000-1522.20180278

基于SPOT-VGT数据的湖南省植被变化及其对气候变化的响应

doi: 10.13332/j.1000-1522.20180278
基金项目: 

国家自然科学基金项目 61640210

湖南省自然科学基金项目 14JJ7039

详细信息
    作者简介:

    刘正才,博士,教授。主要研究方向:测量与遥感。Email: liuzhengcai@163.com 地址:411105湖南省湘潭市湘潭大学土木工程与力学学院

  • 中图分类号: P237;S718.51+2

Vegetation change and its response to climate change based on SPOT-VGT in Hunan Province of southern China

  • 摘要: 目的本文旨在研究湖南省植被变化及其对气候变化的响应,以期为湖南省生态保护提供科学指导依据。方法利用2000—2015年SPOT-VGT NDVI、植被类型以及气象数据,辅以最小二乘趋势分析和相关性分析,探讨了湖南省植被生长变化特征并从年和月变化尺度分析了不同类型植被对气候变化的响应。结果(1) 近16年湖南省大部分地区植被NDVI呈增加趋势,但空间分布差异较大,NDVI高值区在湘西北和湘西南,而湘中及湘北植被覆盖较差;(2)2000—2015年湖南省植被NDVI增幅为0.004 5/a,灌丛NDVI增加趋势最大,达0.005 1/a,而沼泽最小,仅为0.002 6/a;(3)湖南省植被NDVI与气温、降水正负相关共存,与气温的相关性较好。从不同类型植被来看,各类型植被NDVI与气温呈正相关的面积占绝大部分,灌丛和针叶林NDVI与降水呈正相关的面积较大,而草丛、草甸和沼泽NDVI与降水呈负相关的面积较大,阔叶林和栽培植被与降水呈正负相关的面积约各占一半;(4)时滞性分析表明,植被对降水的响应存在2个月滞后,且7月NDVI与6月降水、9月NDVI与同期降水的相关性显著,但逐月NDVI与前0~3个月气温的相关性均不显著。结论近16年湖南省植被覆盖呈增加态势,但空间分布差异较大;不同类型植被对气候要素变化响应也各异。

     

  • 图  1  湖南省植被类型及气象地理区划

    Figure  1.  Distribution of vegetation types and meteorological geographic regionalization in Hunan Province

    图  2  2000—2015年湖南省植被NDVI均值分布

    Figure  2.  Average distribution of vegetation NDVI in Hunan Province from 2000 to 2015

    图  3  2000—2015年湖南省年均NDVI年际变化和不同类型植被NDVI变化

    Figure  3.  NDVI variations of annual mean and different vegetations in Hunan Province from 2000 to 2015

    图  4  2000—2015年湖南省气象因子及NDVI年际变化

    Figure  4.  Annual variations of meteorological factors and NDVI in Hunan Province from 2000 to 2015

    图  5  2000—2015年湖南省植被NDVI变化趋势

    Figure  5.  NDVI variation trend in Hunan Province from 2000 to 2015

    图  6  湖南省不同类型植被NDVI增加和降低面积所占比例

    Figure  6.  Proportion of NDVI increase and decrease of different vegetations in Hunan Province

    图  7  2000—2015年湖南省植被NDVI与气温(a)、降水(b)的相关系数空间分布

    Figure  7.  Correlations between NDVI and temperature(a), precipitation(b) in Hunan Province from 2000 to 2015

    表  1  不同类型植被NDVI与气温、降水相关系数所占比例

    Table  1.   Proportion of NDVI and temperature, precipitation in different vegetation types

    %
    项目
    Item
    针叶林
    Coniferous forest
    栽培植被
    Cultivated vegetation
    阔叶林
    Broadleaved forest
    灌丛
    Shrub
    草丛
    Grass
    草甸
    Meadow
    沼泽
    Swamp
    湖南省
    Hunan Province
    显著负相关Significantly negative correlation 0.03 0.04 0.01 0.01 0.01 0 0 0.02
    中度负相关Moderate negative correlation 0.75 1.18 0.95 0.67 0.95 1.01 0 0.93
    气温 弱负相关Weak negative correlation 9.02 10.30 12.51 10.36 10.89 10.08 9.00 9.87
    Temperature 弱正相关Weak positive correlation 39.11 36.69 40.69 44.34 42.25 42.69 51.00 40.16
    中度正相关Moderate positive correlation 43.86 43.29 38.55 39.51 40.00 40.84 40.00 42.01
    显著正相关Significantly positive correlation 7.23 8.50 7.29 5.12 5.90 5.38 0 7.00
    显著负相关Significantly negative correlation 0.76 0.78 0.98 0.61 1.80 2.18 2.00 0.87
    中度负相关Moderate negative correlation 9.00 11.74 11.14 8.90 17.87 23.70 16.00 10.87
    降水 弱负相关Weak negative correlation 33.10 37.17 35.08 30.57 39.46 43.36 49.00 34.15
    Precipitation 弱正相关Weak positive correlation 40.65 35.47 39.40 40.90 31.11 26.22 29.00 38.38
    中度正相关Moderate positive correlation 15.27 13.76 12.59 17.49 8.83 4.54 4.00 14.63
    显著正相关Significantly positive correlation 1.23 1.08 0.81 1.53 0.93 0 0 1.10
    下载: 导出CSV

    表  2  湖南省植被逐月NDVI与气象因子的相关性

    Table  2.   Correlations between monthly NDVI and meteorological factors in Hunan Province

    项目Item 4月
    Apr.
    5月
    May.
    6月
    Jun.
    7月
    Jul.
    8月
    Aug.
    9月
    Sep.
    10月
    Oct.
    气温Temperature 同期Same period 0.436 0.120 0.412 -0.078 0.393 -0.215 0.183
    前1月Previous one month -0.026 -0.124 0.272 0.194 -0.262 0.126 0.027
    前2月Previous two months 0.282 0.176 0.309 0.109 -0.100 -0.059 -0.001
    前3月Previous three months -0.013 0.380 0.321 0.480 0.017 0.010 -0.291
    降水Precipitation 同期Same period -0.295 -0.278 -0.328 0.151 -0.135 0.510* 0.122
    前1月Previous one month 0.070 0.011 0.016 -0.522* 0.170 0.237 0.486
    前2月Previous two months 0.111 0.022 0.216 0.440 0.248 0.270 0.023
    前3月Previous three months -0.307 -0.367 0.077 -0.261 0.066 -0.251 0.053
    注:*表示P < 0.05,相关性显著。Note: * means P < 0.05,indicating significant correlation.
    下载: 导出CSV
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  • 收稿日期:  2018-08-25
  • 修回日期:  2018-12-10
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