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, 77(3):563-578, 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:2018-05-18  修订日期:2018-09-14
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: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, 合肥, 230026  
陈逸伦 中国科学技术大学地球和空间科学学院, 合肥, 230026  
傅云飞 中国科学技术大学地球和空间科学学院, 合肥, 230026 fyf@ustc.edu.cn 
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中文摘要:
      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。利用中国东部地区1960—2008年74个探空站资料,将SBDART(Santa Barbara DISORT Atmospheric Radiative Transfer)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,并代入SBDART模式中,分别计算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、中东部地区的夏季和华南地区的冬季,差值达20—35 W/m2,相对误差达2.01%—3.18%;(3)在东北地区的冬季、中东部地区的冬季以及华南地区的夏、冬季,模式计算的大气顶向上辐射通量与实际相比差值达10—22 W/m2,相对误差可达3.67%—8.94%;(4)模式与实际辐射加热率的差值在0.03—0.29 K/d。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,不足以代表中国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 the earth-atmosphere radiation budget is one of the decisive factors for climate. Temperature and humidity profiles have important influences on the radiation balance. Based on data collected at 74 sounding stations in eastern China from 1960 to 2008, temperature and absolute humidity profiles from the SBDART (Santa Barbara DISORT Atmospheric Radiative Transfer) model are compared with that from the sounding stations. Besides, the observed sounding profiles are put into the SBDART model to calculate the effects of temperature and absolute humidity profiles on radiation fluxes under clear sky condition. Results indicate that the atmospheric temperature and absolute humidity profiles have obvious regional and seasonal characteristics. There are significant differences between total downward fluxes at the surface calculated from the SBDART model and from observations at the sounding stations, especially in the winter in northeastern China and in the summer in central and eastern China and in the winter in southern China. The differences can reach up to 20-35 W/m2 and the relative errors range from 2.01% to 3.18%. In the winter in northeastern China, in the winter in central and eastern China and in the summer and winter in southern China, the differences between total upward fluxes calculated from the default profiles in the model and from sounding profiles can reach up to 10-22 W/m2 at the top of the atmosphere. And the relative errors range from 3.67% to 8.94%. The differences in the radiative heating rate between the model calculation and observations at sounding stations range from 0.03 K/d to 0.29 K/d. Our studies show that regional and seasonal characteristics of temperature and absolute humidity profiles from the SBDART model cannot realistically represent the conditions in eastern China. The establishment of a set of standard atmospheric profiles for eastern China can provide more accurate inputs for the simulation of radiation.
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