Evaluation of TRMM rainfall for soil moisture prediction in a subtropical climate   总被引：1，自引：1，他引：0  

Manika Gupta  Prashant K. Srivastava  Tanvir Islam  Asnor Muizan Bin Ishak 《Environmental Earth Sciences》2014,71(10):4421-4431

The Tropical Rainfall Measuring Mission (TRMM) is a joint space mission between NASA and the Japan Aerospace Exploration Agency (JAXA) designed to monitor and study tropical rainfall. In this study, the daily rainfall from TRMM has been utilized to simulate the soil moisture content up to 30 cm vertical soil profile of at an interval depth of 15 cm by using the HYDRUS 1D numerical model for the three plots. The simulated soil moisture content using ground-based rainfall and TRMM-derived rainfall measurements indicate an agreeable goodness of fit between the both. The Nash–Sutcliffe efficiency using ground-based and TRMM-derived rainfall was found in the range of 0.90–0.68 and 0.70–0.40, respectively. The input data sensitivity analysis of precipitation combined with different irrigation treatment indicates a high dependency of soil moisture content with rainfall input. The overall analysis reveals that TRMM rainfall is promising for soil moisture prediction in absence of ground-based measurements of soil moisture.  相似文献   

中国超大城市综合实验:京、沪、穗气溶胶理化和吸湿特性          下载免费PDF全文

李占清  王玉莹  吴昊  金筱艾  李尚泽  陈璐  任荣敏  张东梅  张芳 《大气科学学报》2023,46(3):441-452

气溶胶对环境、气象和人体健康都有较大影响,这些影响与气溶胶理化特性(粒子尺度谱、化学组分、混合状态等)密切相关。为了深入研究气溶胶的环境和气候效应,发展了一套气溶胶在线综合观测系统。本文介绍了利用该系统在北京、上海、广州三个超大城市开展的综合观测实验结果。通过对比分析发现,广州气溶胶数浓度最高,其粒子尺度谱分布特征与北京特征相似,均以核模态为主,上海气溶胶数浓度则整体较低。对比三个超大城市的新粒子生成(New Particle Formation,NPF)特征发现,北京NPF的发生频率低于广州,主要由于北京地区大气中大粒径气溶胶更多,较高的碰并汇抑制了NPF的发生和发展。研究发现,观测期间北京和上海站点气溶胶的吸湿性强于广州,人为一次性排放气溶胶吸湿性较弱。气溶胶吸湿性日变化特征与人为活动、气溶胶老化程度密切相关。此外,三个超大城市中气溶胶光吸收系数的日变化特征存在明显差别,北京站点的气溶胶吸收系数呈现白天高、夜间低的特点,而广州站点气溶胶的吸收系数呈现相反的日变化趋势,这可能是由观测站周边的环境差异及大气边界层的变化特征差异造成的。  相似文献   

CWRF对青藏高原气温和降水模拟效果的综合评估          下载免费PDF全文

徐蓉蓉  梁信忠  段明铿 《大气科学学报》2021,44(1):104-117

利用CWRF(Climate-Weather Research and Forecasting model)对中国区域气候的31 a多物理集合模拟试验,分析了该模式对青藏高原气温和降水的模拟效果及其对水平分辨率和物理过程参数化方案的敏感性.结果表明:1)CWRF降尺度全面改善了全球模式对高原气温和降水的模拟,使气温年循...  相似文献