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UID:calendar.541981.field_event_date.0@www.wright.edu
DTSTAMP:20260219T192008Z
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DESCRIPTION:Greetings\,The Physics seminar this week will meet on Friday\, 
 October 25 at 3:00 pm.  You can join live in 210 Fawcett Hall or online at
  this link: https://wright.webex.com/meet/sarah.tebbens The talk will be b
 y Dr. Allen Hunt (live) and is titled 'Realizing the Promise of the Eagles
 on Report.'  We hope you can join us.___________Abstract35 years ago\, the
  Hydrology Community came together to propose a new way forward for hydrol
 ogic sciences. This process had two overarching goals: 1) to identify the 
 greatest challenges in research and education in the hydrologic sciences\,
  2) to develop the infrastructure to promote the solution of these problem
 s. The resulting publication by the National Academy of Sciences has been 
 referred to as the Eagleson Report. In a particularly prescient portion of
  this report (pp. 65-66\, which I recommend everyone read in advance)\, a 
 template for solution of the central problem of hydrology\, the water bala
 nce (i.e.\, the prediction of evapotranspiration ET as a function of clima
 te variables) is laid out\, including the observation that the same templa
 te would serve for the carbon cycle.Three years ago\, my colleagues and I 
 came up independently with a solution of the water balance\, published in 
 Water Resources Research. Unwittingly\, I had laid out the same solution a
 s proposed 30 years before. Because limitations of water and energy were a
 ddressed separately in different climate regimes\, even though the result 
 for ET was continuous across this boundary\, its derivative was not. In 20
 21\, we characterized this predicted sudden change in slope as a defect. I
 n 2023\, however\, we found that the resulting prediction for the precipit
 ation elasticity of streamflow\, which generated a double peak in the elas
 ticity as a function of aridity index\, was verified across four continent
 al- to global-scale datasets. In keeping with the solution proposed of eco
 logical optimality\, we also determined that the predictions of net primar
 y productivity and tree species richness as functions of climate variables
  exhibited unprecedented accuracy. In retrospect\, we can also show what i
 nformation that permitted the solution in 2021 was missing in 1991\, namel
 y the exact forms of the scaling relationships employed to predict soil fo
 rmation and vegetation growth on which the optimality was based\, possibly
  explaining why the problem remained unsolved for an additional 30 years.
DTSTART;TZID=America/New_York:20241025T150000
DTEND;TZID=America/New_York:20241025T160000
LAST-MODIFIED:20241022T144236Z
LOCATION:Fawcett Hall room 210
SUMMARY:Physics Seminar:  Realizing the Promise of the Eagleson Report
URL;TYPE=URI:/events/physics-seminar-realizing-promis
 e-eagleson-report
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