Some variables regional distribution over south ningxia is given out in the course of evapotranspiration estimation : the regional distribution of surface characteristic parameters ( normalzed difference vegetation index , surface albedo , surface temperature ) , radiation balance components ( surface absorbed shortwave radiation , surface longwave radiation , atmospheric counter radiation , net radiation ) , surface heat and balance components ( soil heat flux , sensible heat flux , latent heat flux ) 估算区域蒸发(散)量的过程中,得到许多有意义的量:地表特征参数(植被指数ndvi 、地表反射率、地表温度) ;地表辐射平衡各量(地表短波吸收辐射、地表长波辐射、大气逆辐射、地表净辐射) ;地表热量平衡各量(土壤热通量、显热通量、潜热通量) 。
It is showed that the heat transport crossing the equator has the similar magnitude and the same period of one year , compared with that of 10 n in arabian sea . by contrast , the heat transport across 10 n in bay of bengal has a much smaller value with a prominent semiannual period ; there are tight relationship between integrated zonal wind stress in one latitude of the indian ocean north of 7 n and the total heat transport across that latitude , as well as the total net surface heat flux north of that latitude . the maximum correlation coefficient is less than - 0 . 5 结果表明越赤道和越10on阿拉伯海的热输送量大小具有可比性,且有相同的年循环特征,而10on孟加拉湾纬度的经向热输送较小,且具有半年变化周期;俨s以北印度洋任一纬度上的纬向风应力异常与此纬度上的经向热输送异常以及此纬度以北印度洋总的海面净热通量异常有很好的相关关系,相关系数最大可达一0 . 5以上。
In boreal summer , the entrainment dominates the western part of bay of bengal and most part of arabian coast ; net surface heat flux is always a dominant factor controlling the sst variation in bay of bengal throughout a year . difference physical processes control the temperature of the mixed layer in different regions 在夏季,整个阿拉伯沿岸和孟加拉湾西部混合层底的卷夹作用占优势;海面净热通量在孟加拉湾sst的变化中始终是主要的影响因子;对几个典型区域的研究表明,不同的区域的混合层温度有着非常不同的变化机制。
A transfer model is established , which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains . the model has simulated surface heat flux , surface temperature , temperature profiles , height of mixture layer and so on . and the differences between urban area , suburban area and rural area have been compared . this model mainly depends on the parameters below : surface albedo , surface roughness coefficient , moisture available coefficient of soil , thermal capacity and thermal diffusion coefficient of errain , cloudage . the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day . parameters used in this model aim at beijing city , and the time is at the beginning of september . to other cities , or other time , the parameters should be adjusted accordingly . in addition , being adjusted , the model can also be used for other homogeneous and inhomogeneous terrains 模式主要依赖于以下参数和物理量:地面反照率下垫面粗糙度土壤的可含水量下垫面的热容量和热扩散系数云量等参数。结果表明,本模式能合理地模拟不同地表热量平衡地表气温混合层高度湍流交换系数湍流动能位温廓线等,以及它们的日变化。该模式所取参数主要针对北京市,时间为九月初,对于其他城市,参数应作相应的调整。