| 曲学斌,窦华山,林聪,高绍鑫,王涵.呼伦贝尔市NPP时空变化及其对气候的响应[J].沙漠与绿洲气象,2019,13(5):100~105 |
| 呼伦贝尔市NPP时空变化及其对气候的响应 |
| Temporal and spatial variation of NPP and its response to climate in Hulun Buir |
| 投稿时间：2018-08-31 修订日期：2019-03-14 |
| DOI：10.12057/j.issn.1002-0799.2019.05.015 |
| 中文关键词: 植被净初级生产力 呼伦贝尔市 时空变化 气候响应 |
| 英文关键词:Net Primary Productivity Hulun Buir City Temporal and spatial variation Climate response |
| 基金项目:干旱气象科学研究基金(IAM201706) |
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| 中文摘要: |
| 利用 2000－2015年MOD17A3数据和气象站点资料,分析呼伦贝尔市NPP的时空变化特征及其对气候变化的响应情况。研究表明,呼伦贝尔市平均植被NPP为261.02 gC.m-2.a-1,总体呈自西向东依次递增的分布格局。NPP的年际变化呈波动增长趋势,平均变化率为5.51 gC.m-2.a-1,线性增长达到显著的区域主要位于呼伦贝尔市的草地、大兴安岭南部林地和大部分耕地。16个气象站周边的NPP与各站年降水量均呈正相关,且除莫力达瓦旗外均通过了0.01水平的显著性检验,NPP与年平均气温呈负相关,但多数台站未达到显著,NPP与日照时数的正、负相关台站同时存在。由此可知,呼伦贝尔市NPP的增长主要是受降水影响,高温少雨引发的干旱灾害对呼伦贝尔市生态系统的影响不可忽视。 |
| 英文摘要: |
| Based on MOD17A3 data and meteorological station data from 2000 to 2015, the temporal and spatial variation characteristics of NPP and its response to climate change were analyzed in Hulun Buir. The results showed that the average vegetation NPP of Hulun Beir was 261.02 g?C m-2 a-1, which distribution pattern increased from west to east. The interannual variation of NPP showed a fluctuating trend, which had an average change rate of 5.51 g?C m-2 a-1. There had a significant linear growth in the grassland, the forest in the southern Da Hinggan Mountains and most cultivated land in Hulun Buir City. NPP was positively correlated with the annual precipitation of all stations and passed the 0.01 level significance test, except Molidawa autonomous banner, while negatively correlated with the annual average temperature, but most stations were not significant. There exited some stations which had positive correlations between NPP and sunshine hours, meanwhile there were also stations which have negative correlations. Therefore, NPP was mainly affected by precipitation in Hulun Buir City, and the effect of drought disaste caused by high temperature and less rain on the ecosystem of Hulunbeir couldn’t be ignored. |
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