摘要
在颜宏模式中加入植被参数化方案，并将全国植被划分成１０类，模拟了不同土壤湿度条件下７月高原有、无植被的气候场，发现两者差异较大。在土壤湿度正常时，有植被比无植被情况下四川南部、高原及江淮、东北地区日雨量增加１ｍｍ左右，云贵高原为减雨区达－１～－２ｍｍ·ｄ－１。通过不同土壤湿度控制试验，发现在特定的湿度条件下，植被对降水有增强作用。
A vegetation parameterization scheme was introduced into Yan Hong′s model to investigate the difference in the July climatic fields with and without vegetative cover that was separated into 10 categories across the country from the simulations at a range of soil moisture (SM). Evidence suggests that with normal SM, a 1 mm increase in daily rainfall was discovered when vegetation was considered in contrast to the no vegetation case for south Sichuan, Tibetan Highland, the Jiang Huai drainage and NE China as compared to 1～2 mm decrease over the Yunnan Guizhou Plateau. A range of SM control experiments indicate that vegetative cover caused precipitation to be intensified for a particular SM. The 600 hPa streamline difference map shows a broadly similar pattern to that of surface rainfall difference.
出处
《南京气象学院学报》
CSCD
1997年第2期158-164,共7页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金
