Mean transpiration in March from the plant canopy for the present day scenario

\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__01411a04.xml) for more detail.\n\n

1980-1999年间，植物冠层的年平均（编号00）与逐月（编号01至12）冠层蒸腾（canopy transpiration）量（单位：毫米）。

解读：冠层蒸腾的空间变异性远高于潜在蒸发量（potential evaporation），反映了澳大利亚大陆多数区域的水分限制效应。冠层蒸腾的年平均格局与季节变化模式，均与降雨量的对应格局大体相似。冠层蒸腾图的相对变异性高于总蒸发量或降雨量图，这是因为在植被覆盖度较低的区域，蒸腾仅为总蒸发的一小部分（其余为土壤蒸发）。模型中土壤蒸发与冠层蒸腾的分配比例由叶面积指数（leaf area index）决定。

注：本数据集为基于BiosEquil模型的模拟估算结果，涵盖"aBASE"（1788年前）与"aAGRIC"（当代）两种情景。其中"aAGRIC"情景纳入了当前农业灌溉取水。

EvapCanopy.00.Agric、EvapCanopy.01.Agric 至 EvapCanopy.12.Agric：当代（aAGRIC）情景下的年、逐月冠层蒸腾量（毫米）
EvapCanopy.00.Base、EvapCanopy.01.Base 至 EvapCanopy.12.Base：1788年前（aBASE）情景下的年、逐月冠层蒸腾量（毫米）

数据采用地理坐标系及GDA94（澳大利亚大地坐标系1994）。

详细元数据请参见：http://data.daff.gov.au/anrdl/metadata_files/pa_ctab_r9cl__01411a04.xml