干旱区生态环境知识资源中心(Arid): 近12年陕甘宁黄土高原区植被物候时空变化特征

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	近12年陕甘宁黄土高原区植被物候时空变化特征
其他题名	Spatio-Temporal Variation of Vegetation Phenology on Loess Plateau in Shaanxi-Gansu-Ningxia Region in Recent 12 Years
	韦振锋 1; 王德光 2; 张翀 1; 刘炎序 1
来源期刊	生态与农村环境学报
ISSN	1673-4831
出版年	2014
卷号	30 期号:4 页码:423-429
中文摘要	以SPOT VEGETATION旬数据集为数据源,研究1999-2010年陕甘宁黄土高原区植被物候时空特征。采用时间序列谐波分析法对原数据进行预处理,通过傅里叶插值法将NDVI旬数据插值成日数据,再通过阈值法和最大比率法确定植被物候期。结果表明,陕甘宁黄土高原地区植被物候多年平均值呈纬度变化规律,纬度低的地区生长季始期(SOG)和生长季末期(EOG)提前,生长季长度(LOG)缩短。海拔高度每上升100 m,SOG提前约3 d(P<0.01),EOG提前约2 d(P<0.01), LOG延长约1 d(P>0.05)。1999-2010年植被SOG、EOG和LOG的物候年际变化率分别为-0.02、0.003和0.02 d·a~(-1)。陕甘宁大部分地区SOG呈提前趋势,EOG呈推迟趋势,LOG呈延长趋势。植物物候与降水和河流网相关,干旱低温高纬度地区植被生长停滞提前,生长周期缩短。
英文摘要	Based on a ten-year (1999-2010) SPOT VEGETATION dataset, spatio-temporal vegetation phenological features on the Shaan-Gan-Ning Loess Plateau were studied. The method of harmonic analysis of time series (HANTS) was adopted to pre-process the raw data, the fourier interpolation method to turn NDVI ten-day data into daily data, and the threshold value method and the maximum ratio method to specify vegetation phenological phases. Results show that the multi-year average of vegetation phenology space distribution in the Shaanxi-Gansu-Ningxia varied with the latitude, that is to say, the lower the latitude, the relatively earlier the growth season started (SOG) and ended (EOG) and the shorter the growth season (LOG). Moreover, it started 3 days earlier (P<0.01), ended two days earlier (P<0.01), and lasted one day longer (P>0.05) with the attitude rising every 100 m. During the ten-year period (1999-2010), the annual rate of change in vegetation phenology, SOG, EOG and LOG in that region, was -0.02, 0.003 and 0.02 d·a~(-1), respectively. The vegetation phenology in most part of the Loess Plateau tended to have SOG advanced, EOG postponed and LOG extended, which were supposed to be related to variation of precipitation and the river net system. In high latitude regions, arid and low in temperature, vegetation growth started stagnation earlier and shortened in life cycle.
中文关键词	黄土高原区 ; 植被物候 ; 生长季始期 ; 生长季末期 ; 生长季长度
英文关键词	Loess Plateau region vegetation phenology SOG EOG LOG
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5208783
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231666
作者单位	1.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国; 2.广西财经学院管理科学与工程学院, 南宁, 广西 530003, 中国
推荐引用方式 GB/T 7714	韦振锋,王德光,张翀,等. 近12年陕甘宁黄土高原区植被物候时空变化特征[J]. 陕西师范大学,2014,30(4):423-429.
APA	韦振锋,王德光,张翀,&刘炎序.(2014).近12年陕甘宁黄土高原区植被物候时空变化特征.生态与农村环境学报,30(4),423-429.
MLA	韦振锋,et al."近12年陕甘宁黄土高原区植被物候时空变化特征".生态与农村环境学报 30.4(2014):423-429.