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内蒙古地区植被覆盖变化及其对水热条件的响应

邵艳莹 吴秀芹 张宇清 秦树高 吴斌

邵艳莹, 吴秀芹, 张宇清, 秦树高, 吴斌. 内蒙古地区植被覆盖变化及其对水热条件的响应[J]. 北京林业大学学报, 2018, 40(4): 33-42. doi: 10.13332/j.1000-1522.20170414
引用本文: 邵艳莹, 吴秀芹, 张宇清, 秦树高, 吴斌. 内蒙古地区植被覆盖变化及其对水热条件的响应[J]. 北京林业大学学报, 2018, 40(4): 33-42. doi: 10.13332/j.1000-1522.20170414
Shao Yanying, Wu Xiuqin, Zhang Yuqing, Qin Shugao, Wu Bin. Response of vegetation coverage to hydro-thermal change in Inner Mongolia of northern China[J]. Journal of Beijing Forestry University, 2018, 40(4): 33-42. doi: 10.13332/j.1000-1522.20170414
Citation: Shao Yanying, Wu Xiuqin, Zhang Yuqing, Qin Shugao, Wu Bin. Response of vegetation coverage to hydro-thermal change in Inner Mongolia of northern China[J]. Journal of Beijing Forestry University, 2018, 40(4): 33-42. doi: 10.13332/j.1000-1522.20170414

内蒙古地区植被覆盖变化及其对水热条件的响应

doi: 10.13332/j.1000-1522.20170414
基金项目: 

国家自然科学基金项目 41671080

国家重点研发计划课题 2016YFC0500905

详细信息
    作者简介:

    邵艳莹,博士生。主要研究方向:生态水文及荒漠化防治。Email: shaoyanying@126.com 地址: 100083北京市海淀区清华东路35号北京林业大学水土保持学院

    责任作者:

    张宇清,博士,教授。主要研究方向:荒漠化防治。Email: zhangyq@bjfu.edu.cn 地址:同上

  • 中图分类号: S288; S181; S127

Response of vegetation coverage to hydro-thermal change in Inner Mongolia of northern China

  • 摘要: 目的本文以NDVI为表征,以内蒙古地区植被为研究对象,分析近32年(1982—2013年)生长期各季度植被动态变化趋势及其对气候因子的响应,旨在了解该区的生态环境变化趋势,为区域生态建设提供决策依据。方法本文基于1982—2013年内蒙古地区GIMMS3g NDVI数据集,结合该地区的降水和平均温度数据,运用线性回归、相关性分析和ANUSPLIN插值等方法分析了近32年来生长期各季度植被动态变化趋势及其对气候因子的响应。结果1982—2013年内蒙古地区植被总体上呈上升趋势,内蒙古NDVI与各气候因子的相关性不同,生长期各季度(春、夏、秋)NDVI与降水量多呈显著正相关关系,但与前期降水的相关性更密切;NDVI与温度的相关性以负相关为主。相比于温度,NDVI与降水的相关性更高。结论内蒙古地区植被呈持续好转态势,该区植被在不同生长阶段对水热的响应程度不同。总体上,生长季初期(春季),东北地区(呼伦贝尔市东部及东北部和锡林郭勒市东南边缘),植被对热量变化的响应较为敏感,主要体现在对同时期温度的响应;夏秋季节,中部地区(呼伦贝尔市西南部、锡林郭勒盟大部分地区、乌兰察布市北部、鄂尔多斯市大部)植被动态变化对降水的依赖性较强,突出表现为植被生长对降水的迟滞反应。研究建议,在未来生态恢复与重建工程中,要充分利用自然修复的方式恢复在当地条件下更具有持续性的植被生态系统;同时为避免盲目大规模人工造林导致土地退化,既要考虑目前的水资源承载力,还要考虑未来气候变化背景下,水资源的供给能力。

     

  • 图  1  研究区植被类型及气象站点分布图

    Figure  1.  Distribution of meteorological stations and vegetation types in Inner Mongolia

    图  2  遥感数据集的变化趋势(a)和1985年(b)、2013年(c)高分辨率影像

    Figure  2.  Trends in GIMMS3g NDVI datasets and the high resolution satellite image in 1985 and 2013

    图  3  1982—2013年内蒙古季NDVI年际变化

    Figure  3.  Interannual variations of seasonly NDVI in Inner Mongolia during 1982-2013

    图  4  1982—2013年内蒙古季NDVI趋势变化显著性的空间分布

    Figure  4.  Spatial distribution of significance level of seasonly NDVI trend in Inner Mongolia during 1982-2013

    图  5  1982—2013年内蒙古季降水和平均温度年际变化

    Figure  5.  Interannual variations of precipitation and temperature in Inner Mongolia during 1982-2013

    图  6  1982—2013年内蒙古季NDVI与降水量的相关性

    Figure  6.  Spatial distribution of correlations between seasonly NDVI and precipitation during 1982-2013 in Inner Mongolia

    图  7  1982—2013年内蒙古各季NDVI与平均气温的相关性

    Figure  7.  Spatial distribution of correlations between seasonly NDVI and temperature during 1982-2013 in Inner Mongolia

    表  1  1982—2013年内蒙古季NDVI变化趋势结果统计结果

    Table  1.   Area fraction of classification of variation for NDVI during 1982-2013 in Inner Mongolia

    分级标准
    Classification of variation
    趋势
    Trend
    面积比例Area percentage/%
    春季Spring 夏季Summer 秋季Autumn
    θslope≤-0.009 0 严重退化Serious degradation - - -
    -0.009 0 < θslope≤-0.004 5 中度退化Moderate degradation 0.03 0.01 0.04
    -0.004 5 < θslope≤-0.000 9 轻微退化Slight degradation 5.95 14.28 8.75
    -0.000 9 < θslope≤0.000 9 基本稳定Stability 81.74 61.87 69.65
    0.000 9 < θslope≤0.004 5 轻微改善Slight improvement 12.20 23.56 21.51
    0.004 5 < θslope≤0.009 0 中度改善Moderate improvement 0.07 0.29 0.06
    θslope > 0.009 0 明显改善Significant improvement - - -
    下载: 导出CSV

    表  2  内蒙古季NDVI与同期/前期降水、平均气温的相关性

    Table  2.   Correlations between the same/lagged phase of seasonly NDVI and precipitation, temperature during 1982-2013 in the Inner Mongolia

    气候因子Climatic factor 相关性Correlation 春Spring 夏Summer 秋Autumn
    降水Precipitation 同期Same phase 0.354* 0.648** 0.575**
    滞后期Lagged phase -0.245 0.723** 0.624**
    温度Temperature 同期Same phase 0.361* -0.249 -0.147
    滞后期Lagged phase 0.298* -0.248 -0.135
    注: *表示变化趋势显著(P < 0.05),**表示变化趋势极显著(P < 0.01)。Notes: * and ** stand for statistically significant trend(P < 0.05 and P < 0.01), respectively.
    下载: 导出CSV

    表  3  内蒙古月NDVI与降水和气温相关性的面积比例

    Table  3.   Area fraction of correlations between the same/lag phase of seasonly NDVI and precipitation, temperature during 1982-2013 in Inner Mongolia

    时期
    Period
    相关性
    Correlation
    与降水相关性的面积比例
    Area percentage of correlations with precipitation/%
    与温度相关性的面积比例
    Area percentage of correlations with temperature/%
    春Spring 夏Summer 秋Autumn 春Spring 夏Summer 秋Autumn
    同期Same phase PC 49.77 72.04 67.14 68.62 32.40 57.44
    SPC 5.57 40.23 26.61 30.07 5.40 7.70
    SNC 11.41 2.64 5.74 3.92 19.51 12.41
    滞后期Lagged phase PC 28.11 78.25 77.29 69.48 28.09 39.90
    SPC 0.80 48.51 46.40 23.71 1.76 1.89
    SNC 4.63 0.61 6.98 0.81 14.05 17.63
    注: PC代表正相关的面积比例,SPC代表显著正相关的面积比例,SNC代表显著负相关的面积比例。Notes: PC stands for area fraction of positive correlation, SPC displays area fraction of significantly positive correlation, and SNC displays area fraction of significantly negative correlation.
    下载: 导出CSV
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  • 收稿日期:  2017-11-22
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