A comparison of satellite observations and model simulations of column-integrated moisture and upper-tropospheric humidity
A comparison of satellite observations and model simulations of column-integrated moisture and upper-tropospheric humidity
复制标题
柱积分湿度和对流层上层湿度卫星观测与模型模拟的比较
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
B. Soden
中科院分区：
文献类型：
--
作者：
C. T. Chen;E. Roeckner;B. Soden
摘要 将第四代 ECHAM 大气环流模型获得的水汽分布与特殊传感器微波/成像仪 (SSM/1) 的总降水量 (TPW) 和 TIROS-N 操作垂直探测器 (TOVS) 的对流层上层相对湿度 (UTH) 的卫星观测结果进行比较。一般来说，模型模拟器与卫星观测的气候平均值、季节变化和湿度年际变化非常吻合。但在细节上却存在偏差。大陆西海岸附近的 TPW 和 UTH 被低估，尤其是在东副热带太平洋的北半球夏季。这些偏差与副热带高压过强导致的干燥平流增强和大规模沉降有关。与赤道对流区域重合的高 TPW 和 UTH 区域的扩大证明了 ECHAM4 中热带环流更加强烈。此外，赤道地区的年际异常...
Abstract Water vapor distributions obtained from the fourth generation ECHAM general circulation model are compared with satellite observations of total precipitable water (TPW) from the Special Sensor Microwave/Imager (SSM/1) and upper-tropospheric relative humidity (UTH) from TIROS-N Operational Vertical Sounder (TOVS). In general, the model simulators agree well with satellite observations of the climatological mean, seasonal variation, and interannual variation of moisture. There are, however, biases in the details. Underestimates in TPW and UTH are found off the west coast of continents, especially in the boreal summer over the eastern subtropical Pacific. These biases are related to both enhanced dry advection due to an excessively strong subtropical high and greater large-scale subsidence. A more intense tropical circulation in ECHAM4 is evidenced by the broadening of the high TPW and UTH zone that coincides with the equatorial convective regions. Additionally, interannual anomalies in equatorial U...