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首页> 外文期刊>Hydrology and Earth System Sciences Discussions >Last-decade progress in understanding and modeling the land surface processes on the Tibetan Plateau
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Last-decade progress in understanding and modeling the land surface processes on the Tibetan Plateau

机译:藏高原土地表面流程的最后十年进展

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摘要

Land surface models (LSMs) that simulate water and energy exchanges at the land–atmosphere interface are a key component of Earth system models. The Tibetan Plateau (TP) drives the Asian monsoon through surface heating and thus plays a key role in regulating the climate system in the Northern Hemisphere. Therefore, it is vital to understand and represent well the land surface processes on the TP. After an early review that identified key issues in the understanding and modeling of land surface processes on the TP in 2009, much progress has been made in the last decade in developing new land surface schemes and supporting datasets. This review summarizes the major advances. (i) An enthalpy-based approach was adopted to enhance the description of cryosphere processes such as glacier and snow mass balance and soil freeze–thaw transition. (ii) Parameterization of the vertical mixing process was improved in lake models to ensure reasonable heat transfer to the deep water and to the near-surface atmosphere. (iii) New schemes were proposed for modeling water flow and heat transfer in soils accounting for the effects of vertical soil heterogeneity due to the presence of high soil organic matter content and dense vegetation roots in surface soils or gravel in soil columns. (iv) Supporting datasets of meteorological forcing and soil parameters were developed by integrating multi-source datasets including ground-based observations. Perspectives on the further improvement of land surface modeling on the TP are provided, including the continuous updating of supporting datasets, parameter estimation through assimilation of satellite observations, improvement of snow and lake processes, adoption of data-driven and artificial intelligence methods, and the development of an integrated LSM for the TP.
机译:陆地面模型(LSM)模拟水和能源交换的土地氛围界面是地球系统模型的关键组成部分。西藏高原(TP)通过表面加热驱动亚洲季风,从而在调节北半球的气候系统方面发挥着关键作用。因此,理解和代表TP上的土地表面过程至关重要。早期审查后,确定了2009年TP的理解和建模的关键问题,在开发新的陆地方案和支持数据集时,过去十年取得了很大进展。本综述总结了重大进展。 (i)采用基于焓的方法来增强冰川和雪地质量平衡等冰川和雪地的描述。 (ii)湖泊模型中垂直混合过程的参数化得到改善,以确保对深水和近表面大气进行合理的热传递。 (iii)提出了新方案,用于在土壤中造成土壤中的水流量和传热造成垂直土壤异质性的影响,这是由于土壤柱的表面土壤或砾石中的高土有机质含量和茂密植被根源的影响。 (iv)通过集成包括地面观测的多源数据集,开发了气象迫使和土壤参数的支持数据集。提供了对TP上的地表建模的进一步改善的观点,包括连续更新支持数据集,通过同化卫星观测的参数估计,雪和湖泊过程的改进,采用数据驱动和人工智能方法,以及开发TP的集成LSM。

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