Mean transpiration in May from the plant canopy for the pre 1788 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__01411a19.xml) for more detail.\n\n

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。
说明：冠层蒸腾的空间变异程度远高于潜在蒸发量（potential evaporation），这反映了该大陆多数区域存在的水分限制效应。其年平均分布与季节变化模式均与降雨量的对应模式大体相似。相较于总蒸发量或降雨量的空间分布图，冠层蒸腾分布图具有更高的对比度（相对变异度），原因在于植被覆盖度较低的区域中，冠层蒸腾仅占总蒸发量的较小份额，剩余部分为土壤蒸发（soil evaporation）。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。
备注：本数据集为基于BiosEquil模型的估算结果，涵盖aBASE（1788年前）与aAGRIC（当前）两种情景。其中aAGRIC情景包含当前农业灌溉用水输入。
EvapCanopy.00.Agric、EvapCanopy.01.Agric 至 EvapCanopy.12.Agric：对应aAGRIC（当前）情景下的年/月均冠层蒸腾量，单位为毫米
EvapCanopy.00.Base、EvapCanopy.01.Base 至 EvapCanopy.12.Base：对应aBASE（1788年前）情景下的年/月均冠层蒸腾量，单位为毫米
数据采用地理坐标系与GDA94。
详细元数据请参见[进一步元数据](http://data.daff.gov.au/anrdl/metadata_files/pa_ctab_r9cl__01411a19.xml)。