A 19-year long energy budget of an upland peat bog, northern England
A 19-year long energy budget of an upland peat bog, northern England
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英格兰北部高地泥炭沼泽长达 19 年的能源预算
DOI：
10.1016/j.jhydrol.2014.11.019
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发表时间：
2015
影响因子：
6.4
通讯作者：
C. Moody
中科院分区：
文献类型：
--
作者：
F. Worrall;T. Burt;G. Clay;C. Moody
这项研究估计了英格兰北部泥炭覆盖的集水区的长期蒸发记录。在这项研究中，使用怀特的方法估算了无雨期19年的日蒸发量。研究期间测量了净辐射；根据温度剖面计算土壤热通量；并在能量收支封闭的情况下计算了感热通量。将计算的时间序列与同一时间步长和同一时间段的现有环境信息进行比较。在19年的时间里，可以计算出1662个日蒸发速率（占时间的26%）。研究表明，净初级生产力的能量通量是一个小的、长期的能量汇，但这个汇是泥炭集水区高碳积累的一个优点：在没有长期干物质积累的集水区，净初级生产力一定是一个小的净能量源。研究表明，在研究期间，蒸发量增加，而感热通量显著下降，反映了对感热能量的利用增加，以满足蒸发需求。与其他能量通量相比，蒸发通量的变化相对较小，这表明该系统是一个“近平衡”系统，而不是一个“远离平衡”系统。
This study has estimated the long term evaporation record for a peat covered catchment in northern England. In this study, 19 years of daily evaporation were estimated for rain-free periods using White’s methods. Net radiation was measured over the study period; soil heat flux was calculated from temperature profiles; and sensible heat flux was calculated assuming the energy budget was closed. The calculated time series was compared to available environmental information on the same time step and over the same time period. Over a 19-year period it was possible to calculate 1662 daily evaporation rates (26% of the period). The study showed that the energy flux to net primry productivity was a small, long-term sink of energy but this sink was a virtue of high carbon accumulation in peat catchments: in catchments where there is no long-term dry matter accumulation, net primary productivity must be a small net source of energy. The study showed that evaporation increased over the study period whilst sensible heat flux significantly declined, reflecting an increased use of sensible heat energy to meet evaporative demand. The relatively small change in evaporative flux compared to other energy fluxes suggests that this system is a “near-equilibrium” system and not a “far-from-equilibrium” system.
影响因子：
6.4
作者：
B. Runkle;C. Wille;M. Gažovič;M. Wilmking;L. Kutzbach
通讯作者：
B. Runkle;C. Wille;M. Gažovič;M. Wilmking;L. Kutzbach