近10 年陕甘宁黄土高原区植被覆盖时空变化特征

doi:10.11821/xb201207009

摘要/Abstract

摘要： 基于2000-2009 年MODIS-NDVI 植被覆盖指数, 采用线性趋势分析、Hurst 指数和偏相关系数等数理分析方法, 对陕甘宁地区“退耕还林还草”实施10a 来植被覆盖时空变化特征、影响因素及其未来变化趋势进行分析。结果表明:① 2000-2009 年陕甘宁地区植被覆盖呈现明显增加趋势0.032/10a, 远快于三北防护林工程区1982-2006 年植被覆盖平均增速0.007/10a;② 陕甘宁地区植被恢复具有阶段性, 整体呈“S”型增长, 具有两次明显的植被高恢复期;③ 陕甘宁地区植被恢复以轻微改善为主, 中度改善次之, 呈退化趋势区域比重较小(2.38%), 零星分布于宁南八县、定边东部、甘肃陇东的环县和镇原;④ 陕甘宁地区植被覆盖度逐年提高、生态环境持续改善是人类活动和气候变化共同驱动, 其中人类经济活动作用明显;⑤ 陕甘宁地区植被恢复具有一定的持续性, 未来大部分区域将持续改善, 退化区集中分布于陕北中东部、“彭阳—镇原”南部以及盐池北部。

关键词: 植被覆盖, 退耕还林还草, 植被时空格局, 气候变化, 陕甘宁地区

Abstract: The "Grain for Green Project" initiated by the governments since 1999 were the dominant contributors to the vegetation restoration in the agro-pastoral transitional zone of northern China. Climate change and human activities are responsible for the improvement and degradation to a certain degree. In order to monitor the vegetation variations and clarify the causes of rehabilitation in Shaanxi-Gansu-Ningxia Region, this paper, based on the MODIS-NDVI and climate data during the period 2000-2009, analyzes the main characteristics, temporal-spatial distribution and reasons of vegetation restoration, using methods of linear regression, the Hurst index, standard deviation and other methods. Results are shown as follows. (1) From 2000 to 2009, the NDVI of the study area was improved progressively, with a linear tendency being 0.032/10a, faster than the growth of the Three-North Shelter Forest Program (0.007/10a) from 1982 to 2006. (2) The vegetation restoration is characterized by two fast-growing periods, with an "S-shaped" increasing curve. (3) The largest proportion of the contribution to vegetation restoration was observed in the significantly improved area, followed by the slightly improved area and the significantly degraded area, the last of which is distributed sporadically over southern Ningxia as well as Huanxian, Zhengyuan and eastern Dingbian of Gansu. (4) Climate change and human activities are the two driving forces in vegetation restoration; moreover anthropogenic factors such as "Grain for Green Project" were the main causes leading to an increasing trend of NDVI on local scale. However, its influencing mechanism remains to be further investigated. (5) The Hurst index of NDVI time series shows that the vegetation restoration was sustainable. It is expected that improvement in vegetation cover will expand to the most parts of the region.

Key words: the vegetation cover, "Grain-for-Green Project", vegetation spatial-temporal patterns, climate change, Shaanxi-Gansu-Ningxia Region

李双双, 延军平, 万佳. 近10 年陕甘宁黄土高原区植被覆盖时空变化特征[J]. 地理学报, 2012, 67(7): 960-970.

LI Shuangshuang, YAN Junping, WAN Jia. The Spatial-temporal Changes of Vegetation Restoration on Loess Plateau in Shaanxi-Gansu-Ningxia Region[J]. Acta Geographica Sinica, 2012, 67(7): 960-970.

参考文献

[1] State Forestry Administration. The Fourth Communique of Desertification and Sandy Desertification in China, 2011. [国家林业局. 第五次中国荒漠化和沙漠化公报, 2011.]

[2] Wang Tao, Wu Wei, Xue Xian et al. Spatial-temporal changes of sandy desertified land during last 5 decades innorthern China. Acta Geographica Sinica, 2004, 59(2): 203-212. [王涛, 吴薇, 薛娴等. 近50 年来中国北方沙漠化土地的时空变化. 地理学报, 2004, 59(2): 203-212.]

[3] Wang Tao, Chen Guangting, Zhao Halin et al. Research progress on aeolian desertification process and controlling innorth of China. Journal of Desert Research, 2006, 26(4): 507-516. [王涛, 陈广庭, 赵哈林等. 中国北方沙漠化过程及其防治研究的新进展. 中国沙漠, 2006, 26(4): 507-516.]

[4] Xu Duanyang, Li Chunlei, Zhuang Dafang et al. Assessment of the relative role of climate change and human activitiesin desertification: A review. Acta Geographica Sinica, 2011, 66(1): 68-76. [许端阳, 李春蕾, 庄大方等. 气候变化和人类活动在沙漠化过程中相对作用评价综述. 地理学报, 2011, 66(1): 68-76.]

[5] Wang Tao, Song Xiang, Yan Changzhen et al. Remote sensing analysis on aeolian desertification trends in northernchina during 1975-2010. Journal of Desert Research, 2011, 31(6): 1351-1356. [王涛, 宋翔, 颜长珍等. 近35a 来中国北方土地沙漠化趋势的遥感分析. 中国沙漠, 2011, 31(6): 1351-1356.]

[6] Prince S D. A model of regional primary production for use with coarse resolution satellite data. International Journalof Remote Sensing, 1991, 12(6): 1313-1330.

[7] Carlson T N, Ripley D A. On the relation between NDVI, fractional vegetation cover, and leaf area index. RemoteSensing of Environment, 1997, 62(3): 241-252.

[8] Zhou L M, Tucker C J, Kaufmann R K et al. Variations in northern vegetation activity inferred from satellite data ofvegetation index during 1981 to 1999. Journal of Geophysical Research-Atmospheres, 2001, 106(D17): 20069-20083.

[9] Myneni R B, Keeling C D, Tucker C J et al. Increased plant growth in the northern high latitudes from 1981 to 1991.Nature, 1997, 386(6626): 698-702.

[10] Tucker C J, Slayback D A, Pinzon J E et al. Higher northern latitude normalized difference vegetation index andgrowing season trends from 1982 to 1999. International Journal of Biometeorology, 2001, 45: 184-190.

[11] Zhang Xuezhen, Dai Junhu, Ge Quansheng. Spatial differences of changes in spring vegetation activities across easternChina during 1982-2006. Acta Geographica Sinica, 2012, 67(1): 53-61. [张学珍, 戴君虎, 葛全胜. 1982-2006 年中国东部春季植被变化的区域差异. 地理学报, 2012, 67(1): 53-61.]

[12] Park H-S, Sohn B J. Recent trends in changes of vegetation over East Asia coupled with temperature and rainfallvariations. Journal of Geophysical Research, 2010, 115, D14101, doi: 10.1029/2009JD012752.

[13] Piao Shilong, Fang Jingyun. Seasonal changes in vegetation activity in response to climate changes in China between1982 and 1999. Acta Geographica Sinica, 2003, 58(1): 119-125. [朴世龙, 方精云. 1982-1999 年我国陆地植被活动对气候变化响应的季节差异. 地理学报, 2003, 58(1): 119-125.]

[14] Xin Zhongbao, Xu Jiongxin, Zheng Wei. Response of vegetation cover change to climate change and human activitiesin Loess Plateau. Science in China: Series D, 2007, 37(11): 1504-1514. [信忠保, 许炯心, 郑伟. 气候变化和人类活动对黄土高原植被覆盖变化的影响. 中国科学: D辑, 2007, 37(11): 1504-1514.]

[15] Cui Linli, Shi Jun, Yang Yinming et al. Ten-day response of vegetation NDVI to the variations of temperature andprecipitation in eastern China. Acta Geographica Sinica, 2009, 64(7): 850-860. [崔林丽, 史军, 杨引明等. 中国东部植被NDVI 对气温和降水的旬响应特征. 地理学报, 2009, 64(7): 850-860.]

[16] Chen Xiaoqiu, Wang Heng. Spatial and temporal variations of vegetation belts and vegetation cover degrees in InnerMongolia from 1982 to 2003. Acta Geographica Sinica, 2009, 64(1): 84-94. [陈效逑, 王恒. 1982-2003 年内蒙古植被带和植被覆盖度的时空变化. 地理学报, 2009, 64(1): 84-94.]

[17] Zhang Geli, Xu Xingliang, Zhou Caiping et al. Responses of vegetation changes to climatic variations in Hulun Buirgrassland in past 30 years. Acta Geographica Sinica, 2011, 66(1): 47-58. [张戈丽, 徐兴良, 周才平等. 近30 年来呼伦贝尔地区草地植被变化对气候变化的响应. 地理学报, 2011, 66(1): 47-58.]

[18] Yan Junhui, Liu Dongmei, Yan Junping. The spatial structure of climate change in Shaanxi-Gansu-Ningxia region.Journal of Arid Land Resources and Environment, 2009, 23(9): 67-71. [闫军辉, 刘冬梅, 延军平. 陕甘宁地区气候变化空间结构. 干旱区资源与环境, 2009, 23(9): 67-71.]

[19] Yan Junping, Yan Yan. Design and operation channels of the ecological purchase in the Shaanxi-Gansu-Ningxia borderarea. Acta Geographica Sinica, 2002, 57(3): 343-345.[延军平, 严艳. 陕甘宁边区生态购买设计与操作途径. 地理学报, 2002, 57(3): 343-345.]

[20] Stow D, Daeschner S, Hope A et al. Variability of the seasonally integrated normalized difference vegetation indexacross the north slope of Alaska in the 1990s. International Journal of Remote Sensing, 2003, 24(5): 1111-1117.

[21] Mang Mingguo, Wang Jian, Wang Xuemei. Advance in the inter-annual variability of vegetation and its relation toclimate based on remote sensing. Journal of Remote Sensing, 2006, 10(3): 421-431. [马明国, 王建,王雪梅. 基于遥感的植被年际变化及其与气候关系研究进展. 遥感学报, 2006, 10(3): 421-431.]

[22] Song Yi, Ma Mingguo. Study on vegetation cover change in Northwest China based on spot vegetation data. Journalof Desert Research, 2007, 27(1): 89-93. [宋怡, 马明国. 基于SPOT VEGETATION 数据的中国西北植被覆盖变化分析.中国沙漠, 2007, 27(1): 89-93.]

[23] Xu Jianhua. Mathematical Methods in Contemporary Geography. Beijing: Higher Education Press, 2002. [徐建华. 现代地理学中的数学方法. 北京: 高等教育出版社, 2002.]

[24] Wang Qiang, Zhang Bo, Dai Shengpei et al. Dynamic changes in vegetation coverage in the Three-North ShelterForest Program based on GIMMS AVHRRNDVI. Resources Science, 2011, 33(8): 1613-1620. [王强, 张勃, 戴声佩等. 基于GIMMS AVHRR NDVI数据的三北防护林工程区植被覆盖动态变化. 资源科学, 2011, 33(8): 1613-1620.]

[25] Song Fuqiang, Xing Kaixiong, Liu Yang et al. Monitoring and assessment of vegetation variation in northern Shaanxibased on MODIS/NDVI. Acta Ecologica Sinica, 2011, 31(2): 354-363.[宋富强, 邢开雄, 刘阳等.基于MODIS/NDVI的陕北地区植被动态监测与评价. 生态学报, 2011, 31(2): 354-363.]

[26] Zhang Chong, Ren Zhiyuan. Temporal and spatial differences and its trends in vegetation cover change over the LoessPlateau. Resources Science, 2011, 33(11): 2143-2149. [张翀, 任志远. 黄土高原地区植被覆盖变化的时空差异及未来趋势. 资源科学, 2011, 33(11): 2143-2149.]

[27] Feng Yongzhong, Liu Zhichao, Liu Qiang et al. Temporal and spatial characteristics of dry climate in rain-fed farmingarea of the Loess Plateau. Agricultural Research in the Arid Areas, 2011, 29(2): 218-223. [冯永忠, 刘志超, 刘强等.黄土高原旱作农区气候干旱时空特征分析. 干旱地区农业研究, 2011, 29(2): 218-223.]

[28] Li Xia, Li Xiaobing, Chen Yunhao et al. Temporal responses of vegetation to climate variables in temperate steppe ofnorthern China. Acta Phytoecologica Sinica, 2007, 31(6): 1054-1062. [李霞, 李晓兵, 陈云浩等. 中国北方草原植被对气象因子的时滞响应. 植物生态学报, 2007, 31(6): 1054-1062.]

[29] Zhou Decheng, Zhao Shuqing, Zhu Chao. Impacts of the sloping land conversion program on the land use /coverchange in the Loess Plateau: A case study in Ansai County of Shaanxi Province, China. Journal of Natural Resources,2011, 26(11): 1866-1878. [周德成, 赵淑清, 朱超. 退耕还林工程对黄土高原土地利用/覆被变化的影响: 以陕西省安塞县为例. 自然资源学报, 2011, 26(11): 1866-1878.]

[30] E Youhao, Shi Qian, Ma Yuping et al. The impacts of future climatic change on agricultures and eco-environment ofLoess Plateau in next decade. Acta Ecologica Sinica, 2011, 31(19): 5542-5552. [俄有浩,施茜, 马玉平等. 未来10 年黄土高原气候变化对农业和生态环境的影响. 生态学报, 2011, 31(19): 5542-5552.]