申泽西:基于站点的非线性回归降尺度模型及其在CMIP5降水产品降尺度分析中的应用论文

申泽西:基于站点的非线性回归降尺度模型及其在CMIP5降水产品降尺度分析中的应用论文

本文主要研究内容

作者申泽西,张强,孙鹏,刘春玲,宋长青(2019)在《基于站点的非线性回归降尺度模型及其在CMIP5降水产品降尺度分析中的应用》一文中研究指出:降水是最重要的水循环过程,在全球气候变化影响下,降水过程出现显著时空变异,极端气象事件频发,对我国社会经济发展造成了严重影响.除降水观测数据以外,CMIP5数据已成为未来降水预估研究的重要数据源,而目前CMIP5数据空间分辨率低,如何对CMIP5数据进行降尺度研究,已成为区域降水研究的关键.本文以中国北部农牧交错带为研究区,提出了基于站点的非线性统计降尺度模型(station-based non-linear statistical downscaling model,SNSDM),并得出了以下结论:1)SNSDM降尺度降水序列相对于BCSD(bias corrected spatial downscaling)降尺度降水序列,在同等分辨率的情况下,SNSDM提高了对降水低值的模拟精度,可更为准确地模拟中国北部农牧交错带降水时空特性;2)相比于BCSD降尺度方法,SNSDM模拟结果与实测降水相关性提高最高达1.66%,且明显减少了对实测降水过高估计的误差,最大误差仅为0.2~0.3mm·d-1(每月6~9mm);3)CMIP5降水产品在较为湿润地区对于降水强度及趋势模拟精度要普遍高于对较为干旱地区的模拟精度.本研究提出的SNSDM方法对CMIP5降水数据过高估计实测降水的改进,进一步提高了利用CMIP5数据集对未来气候变化预估的精度及研究结果的可信度.

Abstract

jiang shui shi zui chong yao de shui xun huan guo cheng ,zai quan qiu qi hou bian hua ying xiang xia ,jiang shui guo cheng chu xian xian zhe shi kong bian yi ,ji duan qi xiang shi jian pin fa ,dui wo guo she hui jing ji fa zhan zao cheng le yan chong ying xiang .chu jiang shui guan ce shu ju yi wai ,CMIP5shu ju yi cheng wei wei lai jiang shui yu gu yan jiu de chong yao shu ju yuan ,er mu qian CMIP5shu ju kong jian fen bian lv di ,ru he dui CMIP5shu ju jin hang jiang che du yan jiu ,yi cheng wei ou yu jiang shui yan jiu de guan jian .ben wen yi zhong guo bei bu nong mu jiao cuo dai wei yan jiu ou ,di chu le ji yu zhan dian de fei xian xing tong ji jiang che du mo xing (station-based non-linear statistical downscaling model,SNSDM),bing de chu le yi xia jie lun :1)SNSDMjiang che du jiang shui xu lie xiang dui yu BCSD(bias corrected spatial downscaling)jiang che du jiang shui xu lie ,zai tong deng fen bian lv de qing kuang xia ,SNSDMdi gao le dui jiang shui di zhi de mo ni jing du ,ke geng wei zhun que de mo ni zhong guo bei bu nong mu jiao cuo dai jiang shui shi kong te xing ;2)xiang bi yu BCSDjiang che du fang fa ,SNSDMmo ni jie guo yu shi ce jiang shui xiang guan xing di gao zui gao da 1.66%,ju ming xian jian shao le dui shi ce jiang shui guo gao gu ji de wu cha ,zui da wu cha jin wei 0.2~0.3mm·d-1(mei yue 6~9mm);3)CMIP5jiang shui chan pin zai jiao wei shi run de ou dui yu jiang shui jiang du ji qu shi mo ni jing du yao pu bian gao yu dui jiao wei gan han de ou de mo ni jing du .ben yan jiu di chu de SNSDMfang fa dui CMIP5jiang shui shu ju guo gao gu ji shi ce jiang shui de gai jin ,jin yi bu di gao le li yong CMIP5shu ju ji dui wei lai qi hou bian hua yu gu de jing du ji yan jiu jie guo de ke xin du .

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  • 论文详细介绍

    论文作者分别是来自北京师范大学学报(自然科学版)的申泽西,张强,孙鹏,刘春玲,宋长青,发表于刊物北京师范大学学报(自然科学版)2019年04期论文,是一篇关于降水论文,降尺度论文,农牧交错带论文,气候变化论文,北京师范大学学报(自然科学版)2019年04期论文的文章。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,资料来自北京师范大学学报(自然科学版)2019年04期论文网站,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。

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    申泽西:基于站点的非线性回归降尺度模型及其在CMIP5降水产品降尺度分析中的应用论文
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