地理学报 ›› 2015, Vol. 70 ›› Issue (5): 705-716.doi: 10.11821/dlxb201505003
刘宪锋1,2(), 潘耀忠1,2(
), 朱秀芳1,2, 李双双1,3
收稿日期:
2014-12-21
修回日期:
2015-02-11
出版日期:
2015-05-20
发布日期:
2015-06-11
作者简介:
作者简介:刘宪锋(1986-), 男, 黑龙江鹤岗人, 博士研究生, 主要从事资源环境遥感、灾害遥感研究。E-mail:
基金资助:
Xianfeng LIU1,2(), Yaozhong PAN1,2(
), Xiufang ZHU1,2, Shuangshuang LI1,3
Received:
2014-12-21
Revised:
2015-02-11
Online:
2015-05-20
Published:
2015-06-11
Supported by:
摘要:
利用MODIS-NDVI数据,辅以趋势分析、Hurst指数及偏相关分析等方法,本文探讨了2000-2014年秦巴山区植被覆盖时空变化特征及未来趋势,并对其驱动因素进行分析。研究发现:① 近15年秦巴山区植被覆盖呈显著增加趋势,增速为2.8%/10a,其中2010年之前植被覆盖呈持续增加趋势,增速为4.32%/10a,而2010年之后呈连续下降态势,降速为-6.59%/10a;② 空间上,植被覆盖格局呈现“中间高、四周低”的分布特征,高值区主要分布在陕西境内的秦岭山地和大巴山山地;③ 秦巴山区植被覆盖呈增加和减少趋势的面积分别占81.32%和18.68%;然而,分段结果表明,2010-2014年有71.61%的区域植被覆盖呈下降趋势;④ 秦巴山区植被覆盖变化的反向特征强于同向特征,其中46.89%的区域将由改善转为退化,而持续改善地区仅占34.44%;⑤ 植被覆盖变化主要归因于降水的减少,同时拉尼娜年的植被覆盖整体好于厄尔尼诺年;⑥ 人类活动对植被覆盖造成双重影响,是植被覆盖变化的另一重要影响因素。
刘宪锋, 潘耀忠, 朱秀芳, 李双双. 2000-2014年秦巴山区植被覆盖时空变化特征及其归因[J]. 地理学报, 2015, 70(5): 705-716.
Xianfeng LIU, Yaozhong PAN, Xiufang ZHU, Shuangshuang LI. Spatiotemporal variation of vegetation coverage in Qinling-Daba Mountains in relation to environmental factors[J]. Acta Geographica Sinica, 2015, 70(5): 705-716.
表1
秦巴山区不同植被变化类型像元个数及百分比"
变化类型 | 2000-2014 | 2010-2014 | |||||
---|---|---|---|---|---|---|---|
像元个数 | 百分比/% | 累积百分比/% | 像元个数 | 百分比/% | 累积百分比/% | ||
无显著下降 | 795821 | 18.68 | 18.68 | 2 384 471 | 55.96 | 55.96 | |
弱显著下降 | - | - | - | 248 378 | 5.83 | 61.78 | |
显著下降 | - | - | - | 271 746 | 6.38 | 68.16 | |
极显著下降 | - | - | - | 147 003 | 3.45 | 71.61 | |
无显著上升 | 1996785 | 46.86 | 65.53 | 1 099 103 | 25.79 | 97.40 | |
弱显著上升 | 474747 | 11.14 | 76.67 | 46 298 | 1.09 | 98.49 | |
显著上升 | 687832 | 16.14 | 92.82 | 43 585 | 1.02 | 99.51 | |
极显著上升 | 306127 | 7.18 | 100.00 | 20 727 | 0.49 | 100.00 |
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