| 青海气候变化趋势及对植被生产力影响的研究 |
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| 引用本文： | 张景华,李英年.青海气候变化趋势及对植被生产力影响的研究[J].干旱区资源与环境,2008,22(2):97-102. |
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| 作者姓名： | 张景华 李英年 |
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| 作者单位： | 1. 青海省气象台,西宁,810001
2. 中国科学院西北高原生物研究所,西宁,810001 |
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| 摘 要： | 应用青海省南部三江源区、东北祁连山地及环青海湖区气象站1961-2004年气温、降水和所在地区植被地上净初级生产力资料,分析和模拟了44年来有关气候变化特征以及植被生产力与气温、降水、地理坐标参数间的关系,模拟估算了假设未来气候温暖化情景下青海植被生产力变化的可能。结果表明:44年来青海各地气温均在升高,青海北部比南部增温明显;年降水量变化平稳,但北部比南部有所增加;土壤实际蒸发散表现出明显的升高趋势;青海南部植被地上净初级生产力(NPP)逐年降低,青海东北地区相对平稳。模拟计算表明,由于青藏高原植被的生长主要受温度条件的限制,在未来气候增暖,降水不变或增加的趋势下,植被地上NPP均有所增加。
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| 关 键 词： | 青海植被 蒸发散 气候变化趋势 植被生产力 |
| 文章编号： | 1003-7578(2008)02-097-06 |
| 修稿时间： | 2007年1月4日 |
The Research on Effect of Climate Change on Vegetation Productivity in Qinghai Province |
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| ZHANG Jing-hua,LI Ying-nian.The Research on Effect of Climate Change on Vegetation Productivity in Qinghai Province[J].Journal of Arid Land Resources and Environment,2008,22(2):97-102. |
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| Authors: | ZHANG Jing-hua LI Ying-nian |
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| Abstract: | The data of temperature and precipitation of SanJiangyuan area,Qilian mountainous region and rounding area of Qinghai Lake from 1961 to 2004 and the above vegetation net primary productivity(NPP) since 1989 were used in the paper.44 years of climate change characteristics and relationship between vegetation productivity and temperature,precipitation,and geographic coordinates were analyzed.The probability of vegetation change under the circumstance of climate warming was simulated.The results showed that the temperature was increasing on the whole,and the increase range in the north area was more obvious than the south.The change trend of rainfall was even,but in the north area it increased more than which in the south;The real evaporation of soil increased obviously;The NPP of vegetation above ground in the south decreased yearly,and in the northeast area it was relatively even.Simulation result showed that under the circumstance of climate warming and precipitation being invariable or increase,the NPP would increase because the growth of vegetation was mainly controlled by the temperature on the Qinghai-Tibet plateau. |
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| Keywords: | Qinghai vegetation evaporation trend of climate change vegetation productivity |
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