Mean transpiration in May from the plant canopy for the present day scenario
收藏资源简介：
\n\nMean annual (00) and monthly (01a|12) transpiration (mm) from the plant canopy\nfor the period 1980-1999.Interpretation:Canopy transpiration is far more\nspatially variable than potential evaporation, reflecting the effects of water\nlimitation in most areas of the continent. Both the annual mean and seasonal\npattern broadly resemble the corresponding patterns for rainfall. Canopy\ntranspiration maps have more acontrasta (relative variation) than the total\nevaporation or rainfall maps because transpiration is a small component of\ntotal evaporation in areas of low plant cover (the remainder being soil\nevaporation).The partitioning between soil evaporation and canopy\ntranspiration in the model is determined by leaf area index.Notes: These are\nmodel-based estimates from the BiosEquil model. Results are given for the\naBASEa (pre-1788) and aAGRICa (present day) conditions. The aAGRICa case\nincludes current agricultural inputs of water from\nirrigation.EvapCanopy.00.Agric, EvapCanopy.01.Agric a| EvapCanopy.12.Agric a\nMean annual and monthly canopy transpiration (mm) in the aAGRICa (present day)\nscenarioEvapCanopy.00.Base, EvapCanopy.01.Base a| EvapCanopy.12.Base a Mean\nannual and monthly canopy transpiration (mm) in the aBASEa (pre-1788)\nscenarioData is in geographics and GDA94.\n\nSee [further metadata](http://data.daff.gov.au/anrdl/metadata_files/pa_ctab_r9cl\n__01411a06.xml) for more detail.\n\n
本数据集涵盖1980-1999年间植物冠层蒸腾（canopy transpiration）的年平均（标识：00）与月均（标识：01a|12）量，单位为毫米。 结果解读：冠层蒸腾的空间变异性远高于潜在蒸发量（potential evaporation），反映了该大陆多数区域的水分限制效应。冠层蒸腾的年平均特征与季节变化模式，均与降雨的对应模式大体相似。冠层蒸腾图的相对变异（对比度）高于总蒸发量或降雨量图，原因在于植被覆盖度较低的区域中，蒸腾仅占总蒸发量的较小组分，其余部分为土壤蒸发。模型中土壤蒸发与冠层蒸腾的分配关系由叶面积指数（leaf area index）决定。 注释：本数据集为基于BiosEquil模型的估算结果，包含aBASE（1788年前）与aAGRIC（当前）两种情景。其中aAGRIC情景纳入了当前农业灌溉供水。 EvapCanopy.00.Agric、EvapCanopy.01.Agric、EvapCanopy.12.Agric：对应aAGRIC（当前）情景下的年平均与月均冠层蒸腾量，单位为毫米。 EvapCanopy.00.Base、EvapCanopy.01.Base、EvapCanopy.12.Base：对应aBASE（1788年前）情景下的年平均与月均冠层蒸腾量，单位为毫米。 数据采用地理坐标系与GDA94（澳大利亚大地坐标系1994）。 详细元数据详见：[进一步元数据](http://data.daff.gov.au/anrdl/metadata_files/pa_ctab_r9cl__01411a06.xml)
