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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3609
DTSTART:20150414T170500Z
DTEND:20150414T180000Z
DTSTAMP:20260419T085029Z
LAST-MODIFIED:20150122T233507Z
LOCATION:4274 Chamberlin Hall (Refreshments will be served)
SUMMARY:How scale-dependent are ecosystem-atmosphere exchanges?\, Chao
 s & Complex Systems Seminar\, Ankur Desai\, UW Department of Atmospher
 ic and Oceanic Sciences
DESCRIPTION:Terrestrial surfaces are a lower boundary condition for ex
 changes of trace gases \,energy\, and momentum with the atmosphere and
  consist of biologically-active organisms. In terrestrial ecosystems\,
  information relevant to these processes scales upwards from gene to c
 ell to microbe to plant\, while for the atmosphere\, the relevant mode
 s of interactions with these processes scale downward from climate dyn
 amics to synoptic systems to boundary layer turbulence. Consequently\,
  identifying the appropriate space and time scale over which ecosystem
 s interact with the atmosphere is critical for improving theoretical a
 nd numerical simulations of these processes. Further\, there is a fund
 amental spatiotemporal scale mismatch between the terrestrial observat
 ions made about these process and the spatial scale over which numeric
 al models of ecosystems\, weather systems\, and climate operate. I wil
 l present a general overview of this problem\, a few examples of work 
 in my lab addressing this issue from the perspective of 1) modeling sp
 atial heterogeneity in ecosystem energy balance\, 2) data synthesis fo
 r terrestrial carbon cycling\, and 3) rectification of eddy covariance
  flux tower observation flux footprint bias. The overview and examples
  will be used to engage discussion in a general conceptual framework o
 n ecosystem-atmosphere scaling and model-data comparison.
URL:https://www.physics.wisc.edu/events/?id=3609
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