基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 气候变化研究室

	基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局
	高清竹 1; 万运帆 1; 李玉娥 1; 林而达 1; 杨凯 1; 江村旺扎 2; 王宝山 2; 李文福 2
刊名	应用生态学报
	2007
卷号	18 期号:11 页码:2526-2532
关键词	藏北地区高寒草地 NPP 时空格局 CASA模型
ISSN号	1001-9332
其他题名	Grassland net primary productivity and its spatiotemporal distribution in Northern Tibet: A study with CASA model
英文摘要	基于1981-2004年遥感监测和气象数据,采用CASA(Carnegie-Ames-Stanford Approach)模型模拟分析藏北地区草地植被净第一性生产力(NPP)及其时空变化特征.结果表明:受水热条件的制约,藏北地区草地植被NPP空间分布规律呈水平地带性分布,由东南向西北逐渐由230 g C·m~(-2)·a~(-1)减少到接近0.藏北地区草地植被NPP整体水平较低,年均草地植被总NPP为21.5×10~(12) g C· a~(-1),多年平均值仅为48.1 g C·m~(-2)·a~(-1),明显低于青藏高原和其它草原区.藏北地区坡度小于1°平地和平滩地,以及南坡的草地植被年平均NPP相对较低.藏北主要高寒草地7-9月NPP占全年NPP的64.0%～70.0%.1981-2004年间,藏北地区草地植被总NPP的年际变化较大,并有进一步下降趋势.; Based on the remote sensing data,meteorological data and other related data from 1981 to 2004,the grassland net primary productivity(NPP)and its spatiotemporal distribution in Northern Tibet were analyzed by CASA(Carnegie-Ames-Stanford Approach)model.The results indicated that in the study area,the spatial distribution of grassland NPP was affected by the local water and heat conditions,and represented a horizontal zonality.From southeast to northwest,the grassland NPP reduced from 230 g C·m~(-2)·a~(-1) to near 0 g C·m~(-2)·a~(-1).The overall level of grassland NPP in Northern Tibet was rather low,with the multi-years average value of total NPP being 21.3×10~(12) g C· a~(-1) and the mean value of NPP being 48.1 g C·m~(-2)·a~(-1),which were obviously lower than those in Qinghai-Tibetan Plateau and other grassland areas of China.The mean values of NPP on flat land(slope gradient <1°)and south slope were relatively lower.On the main alpine grasslands in Northern Tibet,the NPP from July to September occupied 64.0%-70.0% of the whole year.From 1981 to 2004,the grassland NPP within the whole Northern Tibet had a greater annual fluctuation,and tended to further reduce.
学科主题	植物学
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/17408]
专题	农业环境与可持续发展研究所_气候变化研究室
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 北京, 100081 2.西藏自治区那曲地区农牧局, 西藏, 那曲, 852100
推荐引用方式 GB/T 7714	高清竹,万运帆,李玉娥,等. 基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局[J]. 应用生态学报,2007,18(11):2526-2532.
APA	高清竹.,万运帆.,李玉娥.,林而达.,杨凯.,...&李文福.(2007).基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局.应用生态学报,18(11),2526-2532.
MLA	高清竹,et al."基于CASA模型的藏北地区草地植被净第一性生产力及其时空格局".应用生态学报 18.11(2007):2526-2532.