1960-2008年冬季期间,中国南方发生了23次低温冰冻(冻雨)天气事件,其中满足站日数大于10的事件有11次.2008年初中国南方发生了一场影响巨大的区域持续性低温冻雨天气事件,2011年初再次发生了类似的区域持续性低温冻雨事...
2~4周的延伸预报是近年来国际上天气和气候业务预报发展的一个重要方向.本文以江淮梅雨区降水为例,在利用集合经验模态分解(EEMD)及多变量EOF方法获取梅雨区降水及其影响系统低频信号的基础上,采用最优子集回归方法、...
从理论上探讨如何提高天气预报和气候预测的技巧,气候包括以小时为基本单位的昼夜循环、以日为基本单位的年(季节)循环、年代际循环和世纪循环等时间尺度的变化.这些气候变化存在确定的外强迫,是可以被认识和预报的.相...
[期刊论文] 《气象学报(英文版)》 2012年1期
Based on the ensemble mean outputs of the ensemble forecasts from the ECMWF (European Centre for Medium-Range Weather Forecasts),JMA (Japan Meteorological Agency),NCEP (National Centers for Environmen...
multimodel superensemble bias-removed ensemble mean multiple linear regression neural network running training period TIGGE
针对长江中下游中尺度地形特点以及暴雨过程发生发展期间风垂直切变的主要观测特征,设计了一系列中尺度地形的三维理想数值试验,分析了干大气地形流和重力波特征,探讨了条件不稳定湿大气地形对流降水的模态分布,在此基...
本文在中国气象科学研究院(CAMS)双参数云微物理方案的基础上,增加气溶胶粒子的活化过程,改进原方案中的水汽混合比、云水混合比及云滴数浓度的预报方程,实现对各种水成物(包括云水)的混合比和数浓度的预报.此外,改进后...
[期刊论文] 《气象》2012年2期
大量的预报业务人员对强对流天气中的大多数基本概念和基础理论"即熟悉、又陌生",这是造成强对流分析、预报过程中许多概念和理论被滥用,预报思路不清晰的重要原因。针对上述问题,本文从预报实践的角度讨论了与强对流...
[期刊论文] 《大气科学进展(英文版)》 2012年1期
In this study,the impacts of horizontal resolution on the conditional nonlinear optimal perturbation (CNOP) and on its identified sensitive areas were investigated for tropical cyclone predictions.Thr...
[期刊论文] 《气象学报(英文版)》 2012年1期
ZHAO Linna QI Dan TIAN Fuyou WU Hao DI Jingyue WANG Zhi LI Aihua
Based on the precipitation and temperature data obtained from THORPEX (The Observing System Research and Predictability Experiment) Interactive Grand Global Ensemble (TIGGE)- China Meteorological Admi...
probabilistic hydrological prediction TIGGE variable infiltration capacity (VIC) model Huaihe River
[期刊论文] 《大气科学进展(英文版)》 2012年5期
Recent progress in the study of nonlinear atmospheric dynamics and related predictability of weather and climate in China (2007-2011) are briefly introduced in this article.Major achievements in the s...
nonlinear atmospheric dynamics predictability weather climate
[期刊论文] 《大气科学进展(英文版)》 2012年1期
A single-model,short-range,ensemble forecasting system (Institute of Atmospheric Physics,Regional Ensemble Forecast System,IAP REFS) with 15-km grid spacing,configured with multiple initial conditions...
short-range ensemble forecast rain enhancement operation probabilistic forecast
[期刊论文] 《大气科学进展(英文版)》 2012年1期
In this study,a series of sensitivity experiments were performed for two tropical cyclones (TCs),TC Longwang (2005) and TC Sinlaku (2008),to explore the roles of locations and patterns of initial erro...
sensitive area conditional nonlinear optimal perturbation CNOP uncertainty of initial conditions nonlinear development
[期刊论文] 《大气科学进展(英文版)》 2012年2期
Constructing β-mesoscale weather systems in initial fields remains a challenging problem in a mesoscale numerical weather prediction (NWP) model.Without vertical velocity matching the β-mesoscale we...
3DVAR mesoscale data assimilation vertical velocity retrieval Richardson's equation
[期刊论文] 《大气科学进展(英文版)》 2012年2期
The lower bound of maximum predictable time can be formulated into a constrained nonlinear optimization problem,and the traditional solutions to this problem are the filtering method and the condition...
predictability on-off switch conditional nonlinear optimal perturbation (CNOP) genetic algorithm (GA)
[期刊论文] 《大气科学进展(英文版)》 2012年5期
In this study,the relationship between the limit of predictability and initial error was investigated using two simple chaotic systems:the Lorenz model,which possesses a single characteristic time sca...
limit of predictability initial error Lorenz model coupled Lorenz model
[期刊论文] 《大气科学进展(英文版)》 2012年5期
The current status of weather forecasting and climate prediction,and the main progress China has made in recent years,are summarized in this paper. The characteristics and requirements of modern weath...
[期刊论文] 《气象学报(英文版)》 2012年1期
There exist typically two kinds of low-level col fields over the middle and lower reaches of the Yangtze River of China during summer.One is associated with the mesoscale vortex embedded in the Meiyu ...
col field mesoscale vortex mesoscale low-level jet wind perturbation
[期刊论文] 《气象学报(英文版)》 2012年1期
Early and effective flood warning is essential for reducing loss of life and economic damage.Three global ensemble weather prediction systems of the China Meteorological Administration (CMA),the Europ...
飑线是中国春、夏季常见的一种天气现象.2007年4月23-24日华南地区的一次强飑线过程,因强度强、持续时间长,给广东部分县市造成巨大的经济损失.利用广州和深圳的新一代多普勒天气雷达的探测资料,采用双多普勒雷达风场反...