摘要
土地覆盖变化会影响到近地层各气象要素发生不同程度的变化。利用中尺度数值模式MM5,设计了一个控制试验和一个敏感性试验。通过对2003年7月一个月的积分,模拟了黄河源区草原退化对局地气候环境的影响。结果表明,黄河源区草原退化导致该地区2 m高度气温及地表温度明显升高;空气湿度及土壤湿度不同程度减小;草原退化后降水的减小影响到径流减小;草原退化后还引起退化区感热通量增加,潜热通量减小,有效通量(感热通量+潜热通量)减小。与草地农牧化相比,草原退化对气候环境的影响程度更强。
To study the impact of grass land degradation in Yellow river source, in this paper a control experiment and a sensitive one making grassland degradation in Yellow river source were designed and integrated for whole month of July, 2003 using the mesoscal model MM5 and the NCEP reanalysed Data. It was found that the grassland degradation induced obviously the 2 m height air temperature and ground surface temperature ascend; the air humidity and soil moisture, decreasing in different extent; the runoff, reducing; the sensible heat flux increasing, the latent heat flux and the efficient flux（sensible heat flux plus latent heat flux）, decreasing. The influence of grassland degradation on climate environment was stronger than that of the grassland agricultural-pastoralization.
出处
《高原气象》
CSCD
北大核心
2009年第2期327-334,共8页
Plateau Meteorology
基金
中国气象局兰州干旱气象研究所科研启动基金项目
干旱气象科学研究基金项目(IAM200821
IAM200607)共同资助
关键词
黄河源区
土地覆盖变化
气候环境
数值模拟
Source region of Yellow River
Land surface change
Climate environment
Numerical simulation
