本文主要研究内容
作者辛悦（2019）在《SACOL站冰云微物理特性的反演研究》一文中研究指出：冰云是全球分布范围最广的云型之一,由于其自身独特的物理光学性质,对地气系统能量平衡起着重要而特殊的作用,了解和认清冰云的微物理特性对于研究冰云在气候变化中的影响具有重要意义。本文利用兰州大学半干旱气候与环境监测站(Semi-Arid Climate and Environment Observatory of Lanzhou University,SACOL)Ka波段毫米波云雷达(Ka-Band Zenith Radar,KAZR)2013年8月至2014年7月的观测数据,结合微脉冲激光雷达(Micropulse Lidar,MPL)观测数据,分别使用传统经验算法、考虑温度订正的反演算法和KAZR-MPL联合反演算法,反演了冰云的冰水含量和有效粒径两个微物理量,形成了云微物理量的反演数据产品。在此基础上,对SACOL站上空云微观特性进行了统计分析,对比验证了不同算法得到的云微物理特性差异,并将反演得到的微物理特性参数输入Fu-Liou辐射传输模式,计算了不同冰云微物理特性参数对大气层顶向上辐射通量的影响,进而与CERES(Clouds and the Earth’s Radiant Energy System)卫星观测进行了对比,评估了不同算法结果的优劣,分析了造成差异的可能原因,为SACOL站KAZR云雷达对冰云微物理特性反演算法的合理采用及其辐射效应的准确计算提供了重要依据,本文主要得到以下结论:(1)冰云的云内微物理参数存在明显的季节变化特征和日变化特征,暖季冰云的冰水含量和有效粒径普遍高于冷季,且其出现最大值的高度更高;冰水含量和有效粒径的月平均值最大值均出现在9月,最小值出现在12月;夏季云层中的冰水含量和有效粒径较大,且其峰值的位置更高,春秋次之,冬季最低;冰云在夜间出现频率较大,白天则相对较小,冰云的冰水含量和有效粒径在一天内存在三个峰值,分别为日出前后、午后和日落后。(2)三种不同反演方法得到的冰水含量均呈现单峰型分布,冰水含量主要集中在0.01-10mg/m~3范围内,最大概率处对应的冰水含量基本集中在0.1mg/m~3附近,但是不同算法的数据集中程度和峰值概率存在一定的差异。三种方法反演得到的有效粒径谱分布则呈现出较大差异,传统经验算法反演的冰晶粒子有效粒径呈单峰型分布,数据主要集中在0-100μm的小粒子半径区域,而KAZR-MPL算法反演得到的粒子分布范围更广,分别在40μm和96μm处存在两个峰值。地基反演的云微物理参数与卫星观测值较为相近,冰水路径的平均误差为27%,但是不同算法对云内结构的描述仍有一定差距。(3)利用三种不同的微物理特性产品结果作为输入场,通过Fu-Liou辐射传输模式计算大气层顶的长、短波辐射通量,结果表明不同云微物理特性计算得到的长波辐射通量与卫星观测数据较为一致,平均误差为5.04%,相关系数均大于0.6,其中,考虑了温度订正的反演算法对长波辐射通量的模拟效果更好。对于短波来说,各反演方法模拟得到的有云情况下大气层顶向上的短波辐射结果均小于观测值,最大平均误差可达24.61%,其中,传统经验算法模拟的短波辐射通量与卫星观测最为接近,其均方根误差较其他方法有显著的减小。冰云短波加热率为正值,长波表现为云层上部辐射冷却,云层下部长波辐射加热的形态,净云辐射加热率主要表现为加热作用。
Abstract
bing yun shi quan qiu fen bu fan wei zui an de yun xing zhi yi ,you yu ji zi shen du te de wu li guang xue xing zhi ,dui de qi ji tong neng liang ping heng qi zhao chong yao er te shu de zuo yong ,le jie he ren qing bing yun de wei wu li te xing dui yu yan jiu bing yun zai qi hou bian hua zhong de ying xiang ju you chong yao yi yi 。ben wen li yong lan zhou da xue ban gan han qi hou yu huan jing jian ce zhan (Semi-Arid Climate and Environment Observatory of Lanzhou University,SACOL)Kabo duan hao mi bo yun lei da (Ka-Band Zenith Radar,KAZR)2013nian 8yue zhi 2014nian 7yue de guan ce shu ju ,jie ge wei mai chong ji guang lei da (Micropulse Lidar,MPL)guan ce shu ju ,fen bie shi yong chuan tong jing yan suan fa 、kao lv wen du ding zheng de fan yan suan fa he KAZR-MPLlian ge fan yan suan fa ,fan yan le bing yun de bing shui han liang he you xiao li jing liang ge wei wu li liang ,xing cheng le yun wei wu li liang de fan yan shu ju chan pin 。zai ci ji chu shang ,dui SACOLzhan shang kong yun wei guan te xing jin hang le tong ji fen xi ,dui bi yan zheng le bu tong suan fa de dao de yun wei wu li te xing cha yi ,bing jiang fan yan de dao de wei wu li te xing can shu shu ru Fu-Lioufu she chuan shu mo shi ,ji suan le bu tong bing yun wei wu li te xing can shu dui da qi ceng ding xiang shang fu she tong liang de ying xiang ,jin er yu CERES(Clouds and the Earth’s Radiant Energy System)wei xing guan ce jin hang le dui bi ,ping gu le bu tong suan fa jie guo de you lie ,fen xi le zao cheng cha yi de ke neng yuan yin ,wei SACOLzhan KAZRyun lei da dui bing yun wei wu li te xing fan yan suan fa de ge li cai yong ji ji fu she xiao ying de zhun que ji suan di gong le chong yao yi ju ,ben wen zhu yao de dao yi xia jie lun :(1)bing yun de yun nei wei wu li can shu cun zai ming xian de ji jie bian hua te zheng he ri bian hua te zheng ,nuan ji bing yun de bing shui han liang he you xiao li jing pu bian gao yu leng ji ,ju ji chu xian zui da zhi de gao du geng gao ;bing shui han liang he you xiao li jing de yue ping jun zhi zui da zhi jun chu xian zai 9yue ,zui xiao zhi chu xian zai 12yue ;xia ji yun ceng zhong de bing shui han liang he you xiao li jing jiao da ,ju ji feng zhi de wei zhi geng gao ,chun qiu ci zhi ,dong ji zui di ;bing yun zai ye jian chu xian pin lv jiao da ,bai tian ze xiang dui jiao xiao ,bing yun de bing shui han liang he you xiao li jing zai yi tian nei cun zai san ge feng zhi ,fen bie wei ri chu qian hou 、wu hou he ri la hou 。(2)san chong bu tong fan yan fang fa de dao de bing shui han liang jun cheng xian chan feng xing fen bu ,bing shui han liang zhu yao ji zhong zai 0.01-10mg/m~3fan wei nei ,zui da gai lv chu dui ying de bing shui han liang ji ben ji zhong zai 0.1mg/m~3fu jin ,dan shi bu tong suan fa de shu ju ji zhong cheng du he feng zhi gai lv cun zai yi ding de cha yi 。san chong fang fa fan yan de dao de you xiao li jing pu fen bu ze cheng xian chu jiao da cha yi ,chuan tong jing yan suan fa fan yan de bing jing li zi you xiao li jing cheng chan feng xing fen bu ,shu ju zhu yao ji zhong zai 0-100μmde xiao li zi ban jing ou yu ,er KAZR-MPLsuan fa fan yan de dao de li zi fen bu fan wei geng an ,fen bie zai 40μmhe 96μmchu cun zai liang ge feng zhi 。de ji fan yan de yun wei wu li can shu yu wei xing guan ce zhi jiao wei xiang jin ,bing shui lu jing de ping jun wu cha wei 27%,dan shi bu tong suan fa dui yun nei jie gou de miao shu reng you yi ding cha ju 。(3)li yong san chong bu tong de wei wu li te xing chan pin jie guo zuo wei shu ru chang ,tong guo Fu-Lioufu she chuan shu mo shi ji suan da qi ceng ding de chang 、duan bo fu she tong liang ,jie guo biao ming bu tong yun wei wu li te xing ji suan de dao de chang bo fu she tong liang yu wei xing guan ce shu ju jiao wei yi zhi ,ping jun wu cha wei 5.04%,xiang guan ji shu jun da yu 0.6,ji zhong ,kao lv le wen du ding zheng de fan yan suan fa dui chang bo fu she tong liang de mo ni xiao guo geng hao 。dui yu duan bo lai shui ,ge fan yan fang fa mo ni de dao de you yun qing kuang xia da qi ceng ding xiang shang de duan bo fu she jie guo jun xiao yu guan ce zhi ,zui da ping jun wu cha ke da 24.61%,ji zhong ,chuan tong jing yan suan fa mo ni de duan bo fu she tong liang yu wei xing guan ce zui wei jie jin ,ji jun fang gen wu cha jiao ji ta fang fa you xian zhe de jian xiao 。bing yun duan bo jia re lv wei zheng zhi ,chang bo biao xian wei yun ceng shang bu fu she leng que ,yun ceng xia bu chang bo fu she jia re de xing tai ,jing yun fu she jia re lv zhu yao biao xian wei jia re zuo yong 。
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论文作者分别是来自兰州大学的辛悦，发表于刊物兰州大学2019-07-29论文，是一篇关于冰云论文,云雷达论文,冰水含量论文,云滴粒子有效粒径论文,兰州大学2019-07-29论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自兰州大学2019-07-29论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：冰云论文; 云雷达论文; 冰水含量论文; 云滴粒子有效粒径论文; 兰州大学2019-07-29论文;