Energy and water cycles in Siberian biosphere

1.湍流通量的总和一般与可用的能量通量，除了当潜热通量大，当总的湍流通量往往超过可用的能量通量，这种偏差的能量平衡的风向的影响。虽然造成这一现象的原因尚不清楚，但可能是周围落叶松林的影响。潜热通量（IE）和感热通量（H）的季节变化和大小相似，均在6月达到最大值，因此，波文比在研究期间的许多天都在1.0左右。在降雨后的晴天，IE非常大，H和IE之和超过净全波辐射.值得注意的是，从2000年7月7日至22日，这对应于一个长的无雨期，IE减少，并小于H。结合同期饱和亏和土壤水分的日变化，认为IE受大气影响而非土壤影响.林下蒸散量（Eu）占整个生态系统蒸散量（Et）的25-50%，林上蒸散量（Eo）也有类似的关系。这些结果表明Eu在该站点的水循环中起着非常重要的作用.在融雪季节后不久，在Spasskaya垫的松树和落叶松林的水和能量交换的显着差异发生。这可能是由于物种（万年青林与落叶林）或土壤解冻条件的差异。因此，在研究期间的过程中，在松树网站的鲍文比的季节性变化的形状是显着不同的落叶松林。

1. The sum of the turbulent fluxes was generally in good agreement with the available energy flux, except when the latent heat flux was large, when the total turbulent fluxes often exceeded the available energy flux ; this bias in the energy balance was affected by the wind direction. Although the reasons for this phenomenon at this site are not clear, it might be an effect of the larch forest surrounding the site.2. The seasonal variation and magnitude of the latent heat flux (IE) were similar to those of the sensible heat flux (H) ; both were maximal in June, Consequently, the Bowen ratio was around 1.0 on many days during the study period. On some clear days just after rainfall events, IE was very large, and the sum of H and IE exceeded the net all-wave radiation.3. Remarkably, from 7 to 22 July 2000, which corresponded to a long rainless period, IE decreased and was smaller than H. Considering the diurnal change in the saturation deficit and soil moisture for the same period, it is thought that IE was affected by the atmosphere rather than by the soil.4. The contribution of understory evapotranspiration (Eu) to the evapotranspiration from the entire ecosystem (Et) was 25-50% of Et throughout the period analyzed, and a similar relationship was obtained for overstory transpiration (Eo). These results suggest that Eu plays a very important role in the water cycle at this site.5. Significant differences in the water and energy exchanges of the pine and larch forests at Spasskaya Pad occurred just after the snowmelt season. This could have been due to the difference in species (evergreen versus deciduous forest) or in soil thawing conditions. Consequently, the shape of the seasonal variation in the Bowen ratio over the course of the study period at the pine site was markedly different from that in the larch forest.