in Cloudy Atmospheres Alexandra L. Jones Blue Waters Graduate - - PowerPoint PPT Presentation
High Accuracy 3D Radiative Transfer in Cloudy Atmospheres Alexandra L. Jones Blue Waters Graduate Fellow Advisor: Larry Di Girolamo Department of Atmospheric Sciences, University of Illinois, Urbana-Champaign Blue Waters Symposium May 12,
Advisor: Larry Di Girolamo
Department of Atmospheric Sciences, University of Illinois, Urbana-Champaign
aljones4@Illinois.edu
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Adapted from graphic by NOAA
MISR, 2007
qld.gov.au
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W×ÑI(r,W) = -se(r)I(r,W)+s a(r)B(T(r)) + s s(r) 4p p(r,W, ¢ W )I(r, ¢ W )d ¢ W
4p
ò
ICA PP 3D
Produce Highly Accurate Benchmark Simulations
Quantify bias in our approximations Improve simpler/faster parameterizations
3D Broadband Monte Carlo Community Model
Faster science progress Starting point: I3RC
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Spectral Integration Solar, thermal broadband I3RC Solar Only Source Function Domain for each λ β, ω, Ρ, x, y, z, A,T, λ
TOA input flux linear
function of wavelength
𝐺↓𝑈𝑃𝐵 λ = 𝑐λ
Absorption coefficient
linear function of wavelength
𝛾𝑏 λ = 𝑏λ
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𝐺↓𝑡𝑔𝑑 = −𝑐 𝑏∆𝑨 2 𝑓−𝑏λ𝑔∆𝑨 𝑏λ𝑔∆𝑨 + 1 − 𝑓−𝑏λ𝑗∆𝑨 𝑏λ𝑗∆𝑨 + 1
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Spectral Integration Solar, thermal broadband I3RC Solar Only Source Function HITRAN S ARTS Model CIRC T, P , z, VMRS SSP Table σ, ω, Ρ, A, λ Absorption Tables σ SSP Table Creation Tool Domain T, P , x, y, z
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LBLRTM Flux I3RC Flux
FORMER
Master assigns lesser of
Workers trace those
Repeat until no photons
1 2 4 5 8
CURRENT
Master assigns #perBatch
Workers trace those
Repeat until no photons
50 50 50 50 50
92% improvement in total compute time
This research is part of the Blue Waters sustained-petascale computing project, which is supported by the National Science Foundation (awards OCI- 0725070, ACI-1238993 and ACI-14- 44747) and the state of Illinois. Blue Waters is a joint effort of the University
National Center for Supercomputing Applications.
This work has also been funded by the NASA Earth and Space Science graduate fellowship program.
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**List of references can be found on my poster**