孙囡,陈逸伦,傅云飞. 2019. 中国东部大气温湿廓线特征及其对辐射收支计算影响的分析[J]. 气象学报, (0):-, doi:10.11676/qxxb2019.018
中国东部大气温湿廓线特征及其对辐射收支计算影响的分析
Characteristics of Temperature and Humidity Profiles in Eastern China and their Impacts on Radiation Budget
投稿时间:2018-05-11  修订日期:2018-08-17
DOI:10.11676/qxxb2019.018
中文关键词:  中国东部,辐射,大气温湿廓线,气候,辐射传输模式
英文关键词:The eastern China, Radiation, Temperature and humidity profiles, Climate, Radiative transfer model
基金项目:国家重点研发计划项目 2017YFC1501402,中央高校基本科研业务费专项资金
作者单位E-mail
孙囡 中国科学技术大学地球和空间科学学院 nsun1994@mail.ustc.edu.cn 
陈逸伦 中国科学技术大学地球和空间科学学院 cyl1995@mail.ustc.edu.cn 
傅云飞 中国科学技术大学地球和空间科学学院 fyf@ustc.edu.cn 
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中文摘要:
      地气辐射平衡是气候决定性因素之一,温湿廓线对辐射计算有重要影响。本文利用中国东部地区1960—2008 年74个探空站资料,将SBDART辐射传输模式自带的大气温湿廓线和探空测得的实际大气温湿廓线进行对比,并带入SBDART模式中,分别计算出晴空条件下不同温湿廓线对辐射通量的影响。结果表明:(1)中国东部地区的大气温湿廓线有明显的区域和季节特点(2)模式地面向下辐射通量与实际相比有较明显差异,尤其是在东北地区的冬季、华南地区的夏季和华南地区的冬季,差异达到了20—35 W/m2。相对误差达到了2.01%—2.95%,(3)在东北地区的冬季以及华南地区的夏季,模式计算的大气顶向上辐射通量与实际相比差异达到了10—22 W/m2。相对误差可达1.82%—8.94%。(4)模式与实际辐射加热率的差值在0.03 -0.29 K/d之间。研究表明,模式自带的大气温湿廓线区域和季节划分并不够细致,不足以代表东部地区各个区域及季节的温湿特点。建立一套中国东部地区的大气标准廓线可以为辐射模拟提供更准确的输入量。
英文摘要:
      The balance of earth-atmosphere radiation budget is one of the decisive factors of climate. The temperature and humidity profiles have an important influence on the radiation. Based on the datasets of 74 sounding stations in eastern China from 1960 to 2008, we compared temperature and absolute humidity profiles from SBDART (Santa Barbara DISORT Atmospheric Radiative Transfer) model with that from sounding stations. Besides, we put these data of profiles into SBDART model and calculated the effects of temperature and absolute humidity profiles on radiation fluxes under clear sky separately. Our results indicate atmospheric temperature and absolute humidity profiles have obvious regional and seasonal characteristics. There are significant differences between total downward fluxes which are calculated from model and from sounding stations at the surface, especially in the winter of the northeast China, the summer and winter of the southern China, the differences reach to 20—35 W/m2 and the relative errors are from 2.01% to 2.95%. In the winter of the northeast China and the summer of the southern China, the differences between total upward fluxes which are calculated from the two kinds of profiles reach to 10—22 W/m2 at the top of atmosphere. And the relative errors are from 1.82% to 8.94%. The differences of radiative heating rate between that from model and that from sounding stations are from 0.03 K/d to 0.29 K/d. Our studies show that regional and seasonal characteristics of the temperature and absolute humidity profiles from SBDART model are not enough to represent that of the eastern China. The establishment of a set of atmospheric standard profiles of the eastern China can provide more accurate inputs for the simulation of radiation.
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