地理学报 ›› 2012, Vol. 67 ›› Issue (1): 53-61.doi: 10.11821/xb201201006
张学珍, 戴君虎, 葛全胜
收稿日期:
2011-08-08
修回日期:
2011-10-08
出版日期:
2012-01-20
发布日期:
2012-01-20
通讯作者:
葛全胜(1963-), 研究员, 中国地理学会会员(S110000942M)。E-mail: geqs@igsnrr.ac.cn
基金资助:
ZHANG Xuezhen, DAI Junhu, GE Quansheng
Received:
2011-08-08
Revised:
2011-10-08
Online:
2012-01-20
Published:
2012-01-20
Supported by:
摘要: 分析了中国东部1982-2006 年4-5 月归一化差值植被指数(NDVI) 的空间格局和变化趋势空间分布,通过聚类分析辨识了植被活动变化过程的主要模态,并探讨了他们与温度和降水变化的相关关系。结果表明:(1) 多年平均的春季植被活动呈现南强北弱的分布特征,由强到弱的过渡带大约位于34°~39°N;(2) 1982-2006 年,华北平原、呼伦贝尔草原和洞庭湖平原的春季植被活动呈显著增强的趋势,其中华北平原NDVI 增速高达0.03/10 年(r2 = 0.52;p <0.001),长三角和珠三角地区则呈显著减弱的趋势,其中长三角地区NDVI减速达-0.016/10 年(r2 = 0.24;p = 0.014);(3) 1982-2006 年春季植被活动变化过程的区域差异鲜明,并呈现层次性特征,首先是长三角和珠三角与其他地区的差异,前者呈减弱趋势,后者呈增强趋势,其次是呼伦贝尔草地、华北以及江南—华南地区与东北地区、内蒙古东部和东南部及长江下游地区的差异,前者持续增强,后者以1998 年为分界点先增强后减弱,再次是各个模态年际变率的差异;(4) 半湿润—半干旱的草地和农田区植被活动与降水量变化显著正相关,半湿润—湿润的森林区植被活动与温度变化显著正相关,温度或者降水最高能解释NDVI 60%的方差。
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[J]. 地理学报, 2012, 67(1): 53-61.
ZHANG Xuezhen, DAI Junhu, GE Quansheng. Spatial Differences of Changes in Spring Vegetation activities across Eastern China during 1982-2006[J]. Acta Geographica Sinica, 2012, 67(1): 53-61.
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