2篇
您的检索式：作者名="Chris SOULSBY"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Hysteresis in sap flow and its controlling mechanisms for a deciduous broad-leaved tree species in a humid karst region显示文摘The critical zone(CZ) represents the intersection of the biosphere with the atmosphere, hydrosphere and lithosphere.Understanding the hydrological processes and human impact factors on the CZ is fundamental to sustainable water resources management for agroforestry. Transpiration(T) is an important component of terrestrial evapotranspiration(ET), and understanding the time lag(TL) between vegetation transpiration and meteorological factors can improve our knowledge of the mechanisms of vegetation adaptability to a changing environment. However, the controlling factors on the TL remain poorly understood. Therefore, the objective of this study is identifying the temporal dynamics of key controlling factors on the TL, using a typical deciduous broad-leaved tree species(Zenia insigins Chun) of CZ in subtropical humid karst regions. This species is used as an example to explore the characteristics of the TL between SF(sap flow) and hydro-meteorological forcing. Sap flow in these 6 trees was monitored using the thermal dissipation probes(TDP). Results showed that:(1) the peak of diurnal sap flow generally lagged behind PAR but preceded Ta(air temperature), RH(relative humidity) and VPD(vapor pressure deficit), with the mean TL of-67.4 min(PAR), 90.5 min(Ta), 91.6 min(RH) and 92.9 min(VPD), respectively;(2) TL had no significant relationships with the daily mean meteorological factors and soil moisture, but was highly(R^2>0.66) correlated to CRs(changing rates of meteorological factors) in the morning;(3) At seasonal scale, the sap flow rate and TL both were controlled by the seasonality of precipitation and temperature. Overall, the seasonality of the TL was caused by plants' high water loss and strongly active physiological response in hot seasons, leading to close stomata earlier than in cold seasons;(4) The reason why CRs proposed can explain the TL better than mean values of metrological factors is that the CRs considered the distribution and change processes of metrological factors in the daytime. This study may be helpful for understanding the physiological response of vegetation to climatic change, and may be useful for constructing models to simulate transpiration processes more accurately during a day. | Rongfei ZHANG Xianli XU Meixian LIU Yaohua ZHANG Chaohao XU Ruzhou YI Wei LUO Chris SOULSBY | 2019 | Science China Earth Sciences2019，62，11： | 9 |
| 2 | 流域示踪水文模型研究综述显示文摘流域示踪水文模型是水文模型发展重要分支,通过示踪剂迁移与水分运动的耦合计算,深化对水流路径、水分来源及水龄分布等流域水文过程与水文功能的认识,实现气象条件与流域特征对产汇流过程及溶质运移控制作用的精准刻画。同时,示踪剂信息的耦合也为传统水文模型不确定性研究提供了新思路。针对这一水文学研究发展中的新领域,目前存在诸多挑战与机遇,迫切需要新理论与新方法及相关实践。论文系统梳理了流域示踪水文模型的研究进展,详细论述了建模类型及适用性、示踪剂与水分(水流)的耦合计算方法,以及针对特殊气候、地貌区的示踪水文模型,总结了示踪水文模型面临的挑战与发展方向,为深入开展相关研究提供参考借鉴。 | 张志才 陈喜 程勤波 吴夏懿 Chris Soulsby | 2020 | 水文2020，40，6： | 5 |
您所在的机构暂未开通此部分的功能，请联系管理员