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go</title></head><body>
<div>Ecology Letters December 2015</div>
<div><font face="Times" size="-1" color="#262626"><b>DOI:</b>
10.1111/ele.12525</font></div>
<div><br></div>
<div><font face="Times" size="+2" color="#000000">Water availability
predicts forest canopy height at the global scale</font></div>
<div><font face="Times" size="+2" color="#000000">Authors</font></div>
<div><font face="Times">Tamir Klein,Christophe Randin,Christian
Körner</font></div>
<div><font face="Times" size="-1"
color="#262626"><b><x-tab>
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<div><font face="Times" size="+2"
color="#323232">Abstract</font></div>
<div><font
face="Times">http://onlinelibrary.wiley.com/doi/10.1111/ele.12525/full</font
></div>
<div><font face="Times"><br></font></div>
<div><font face="Times">The tendency of trees to grow taller with
increasing water availability is common knowledge. Yet a robust,
universal relationship between the spatial distribution of water
availability and forest canopy height (H) is lacking. Here, we created
a global water availability map by calculating an annual budget as the
difference between precipitation (P) and potential evapotranspiration
(PET) at a 1-km spatial resolution, and in turn correlated it with a
global H map of the same resolution. Across forested areas over the
globe, Hmean increased with P-PET, roughly: Hmean
(m) = 19.3 + 0.077*(P-PET). Maximum forest canopy
height also increased gradually from ~ 5 to ~ 50 m,
saturating at ~ 45 m for P-PET > 500 mm. Forests
were far from their maximum height potential in cold, boreal regions
and in disturbed areas. The strong association between forest height
and P-PET provides a useful tool when studying future forest dynamics
under climate change, and in quantifying anthropogenic forest
disturbance.</font></div>
<div><font face="Geneva" size="-1"
color="#000000">==========================================<br>
" Š the proportion of the land surface in extreme drought is
predicted to increase from 1% for the present day to 30% by the end of
the twenty-first century." <br>
<br>
ELEANOR J. BURKE, et al. "Modeling the Recent Evolution of
Global Drought and Projections for the Twenty-First Century with the
Hadley Centre Climate Model."<br>
<i>JOURNAL OF HYDROMETEOROLOGY</i> OCTOBER<b> 2006</b></font><br>
<font face="Geneva" size="-1" color="#000000"><b></b></font></div>
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<div><font face="Bookman Old Style" size="-1" color="#000000">* Je
Suis Paris *</font></div>
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