陆面过程对中国东部夏季极端降水的影响:CWRF模拟的启示

IF 4.5 2区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
Chenyi Zhang , Qingquan Li , Xin-Zhong Liang , Lili Dong , Bing Xie , Weiping Li , Chao Sun
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引用次数: 0

摘要

了解陆面过程对夏季极端降水的影响对于准确预测气候至关重要。本研究利用区域气候-天气研究和预报模式,采用两种陆面参数化方案:结合地表-副表面过程(CSSP)方案和 NOAH 陆面模式(NOAH),研究了华东三个分区(华北、华中和华南)的陆面过程对极端降水的影响。与观测数据和再分析数据相比,两种方案都成功地再现了极端降水的空间分布,其中 CSSP 方案在模拟蒸散方面具有明显优势。陆面过程对夏季极端降水的影响在三个分区之间存在差异,主要取决于土壤水分条件。华北地区是干旱与湿润的过渡地带,土壤水分对极端降水的影响主要来自抬升凝结水平与行星边界层高度之间的差异。在土壤湿度适中的华中地区,土壤湿度和净辐射共同影响极端降水,偏差与行星边界层高度有关。在华南地区,夏季土壤水分大部分处于饱和状态,净辐射主导着陆面变量的变化,潜热偏差导致极端降水偏差。总体而言,土壤水分通过改变行星边界层的能量和稳定性以及抬升凝结水平来影响极端降水。这些发现可为评估和未来改进模式提供信息,并为极端降水事件的监测和预测提供支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impacts of land surface processes on summer extreme precipitation in Eastern China: Insights from CWRF simulations
Understanding the impacts of land surface processes on summer extreme precipitation is crucial for accurate climate predictions. This study investigated these impacts across three subregions of eastern China (North China, Central China, and South China) using the regional Climate–Weather Research and Forecasting model with two land surface parameterization schemes: the Conjunctive Surface–Subsurface Process (CSSP) scheme and the NOAH Land Surface Model (NOAH). When compared with observational and reanalysis data, both schemes were found to successfully reproduce the spatial distribution of extreme precipitation, with the CSSP scheme showing distinct advantages in simulating evapotranspiration. The influence of land surface processes on summer extreme precipitation varies among the three subregions, largely depending on soil moisture conditions. In North China, a transitional zone between arid and humid regions, soil moisture primarily influences extreme precipitation, with biases arising from difference between the lifting condensation level and the planetary boundary layer height. In Central China, where soil moisture is moderate, soil moisture and net radiation jointly influence extreme precipitation, with biases linked to the planetary boundary layer height. In South China, where soil moisture is mostly saturated during summer, net radiation dominates the variability of land surface variables, with latent heat bias leading to extreme precipitation bias. Overall, soil moisture affects extreme precipitation by altering the energy and stability of the planetary boundary layer and the lifting condensation level. These findings could inform the assessment and future improvement of models, and support the monitoring and predicting of extreme precipitation events.
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来源期刊
Atmospheric Research
Atmospheric Research 地学-气象与大气科学
CiteScore
9.40
自引率
10.90%
发文量
460
审稿时长
47 days
期刊介绍: The journal publishes scientific papers (research papers, review articles, letters and notes) dealing with the part of the atmosphere where meteorological events occur. Attention is given to all processes extending from the earth surface to the tropopause, but special emphasis continues to be devoted to the physics of clouds, mesoscale meteorology and air pollution, i.e. atmospheric aerosols; microphysical processes; cloud dynamics and thermodynamics; numerical simulation, climatology, climate change and weather modification.
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