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首页> 外文期刊>Journal of Geophysical Research, D. Atmospheres: JGR >Soil Moisture Memory and Its Effect on the Surface Water and Heat Fluxes on Seasonal and Interannual Time Scales
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Soil Moisture Memory and Its Effect on the Surface Water and Heat Fluxes on Seasonal and Interannual Time Scales

机译：土壤湿气记忆及其对季节性和持续时间尺度的地表水和热通量的影响

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摘要

The persistence of soil moisture anomalies has an important effect on the weather and climate forecasts. Numerous observational and modeling studies have addressed the memory of soil moisture anomalies and its effects at the seasonal scale, and few studies have focused on the interannual scale. This study investigates the soil moisture memory and its effect on the surface heat and water fluxes under different atmospheric conditions on seasonal and interannual scales using the Community Land Model Version 4.5 driven by the observations at the Tongyu site. The results indicate that the soil moisture anomalies can persist for more than 1 year. It was found that the decay rate of soil moisture anomalies depends mainly on initial soil moisture anomalies, followed by atmospheric condition in this study. Under the same atmospheric condition, the wet anomalies of soil moisture decay faster than dry anomalies of soil moisture. With the same initial soil moisture anomalies, soil moisture memory is usually shorter under the wet atmospheric condition. Moreover, the soil moisture anomalies have an obvious exponential decrease over the years. The anomalies of the surface heat fluxes have significant interannual attenuation trend and seasonal variations, and they are closely related to the anomalies of surface temperature, which are mainly affected by the anomalies of soil specific heat capacity. This study provides a scientific support for understanding the persistence of soil moisture anomalies, and it may be useful for the research on the seasonal and interannual variability of climate.
机译：土壤水分异常的持续存在对天气和气候预测具有重要影响。许多观察和建模研究已经解决了土壤水分异常的记忆及其在季节性范围内的影响，并且很少的研究专注于际规模。本研究研究了土壤水分记忆及其对不同大气条件下的地表热量和水量的影响，在季节性和互际规模上使用通社会陆地模型4.5在通宇网站上的观察结果驱动。结果表明，土壤水分异常可以持续超过1年。发现土壤水分异常的衰减率主要取决于初始土壤水分异常，随后在本研究中进行大气状况。在相同的大气条件下，土壤湿度衰减的湿异常比土壤水分的干燥异常更快。通过相同的初始土壤水分异常，土壤水分内存通常在湿式大气条件下较短。此外，多年来土壤水分异常具有明显的指数下降。表面热通量的异常具有显着的际衰减趋势和季节性变化，它们与表面温度的异常密切相关，这主要受土壤特异性热容量的异常影响。本研究提供了理解土壤水分异常持续性的科学支持，可能对气候季节性和际变化的研究有用。

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  • 作者

    Y. M. Song; Z. F. Wang; L. L. Qi; A. N. Huang;

  • 作者单位

    Key Laboratory of Meteorological Disaster Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD) Na;

    Key Laboratory of Meteorological Disaster Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD) Na;

    School of Computer Engineering Weifang University Weifang China;

    School of Atmospheric Sciences Nanjing University Nanjing China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    Soil Moisture; Memory and Its Effect on the Surface Water; Heat Fluxes on Seasonal; Interannual Time Scales;

    机译：土壤湿度;记忆及其对地表水的影响;季节性的热量通量;持续时间尺度;

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