Using deep learning to emulate and accelerate a radiative-transfer model
Using deep learning to emulate and accelerate a radiative-transfer model
复制标题
使用深度学习来模拟和加速辐射传输模型
DOI:
10.1175/jtech-d-21-0007.1
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发表时间:
2021
影响因子:
2.2
通讯作者:
Hagerty, Venita
中科院分区:
文献类型:
--
作者:
Lagerquist, Ryan;Turner, David;Ebert-Uphoff, Imme;Stewart, Jebb;Hagerty, Venita
This paper describes the development of U-net++ models, a type of neural network that performs deep learning, to emulate the shortwave Rapid Radiative Transfer Model (RRTM). The goal is to emulate the RRTM accurately in a small fraction of the computing time, creating a U-net++ that could be used as a parameterization in numerical weather prediction (NWP). Target variables are surface downwelling flux, top-of-atmosphere upwelling flux (), net flux, and a profile of radiative-heating rates. We have devised several ways to make the U-net++ models knowledge-guided, recently identified as a key priority in machine learning (ML) applications to the geosciences. We conduct two experiments to find the best U-net++ configurations. In experiment 1, we train on nontropical sites and test on tropical sites, to assess extreme spatial generalization. In experiment 2, we train on sites from all regions and test on different sites from all regions, with the goal of creating the best possible model for use in NWP. The selected model from experiment 1 shows impressive skill on the tropical testing sites, except four notable deficiencies: large bias and error for heating rate in the upper stratosphere, unreliablefor profiles with single-layer liquid cloud, large heating-rate bias in the midtroposphere for profiles with multilayer liquid cloud, and negative bias at low zenith angles for all flux components and tropospheric heating rates. The selected model from experiment 2 corrects all but the first deficiency, and both models run ~104times faster than the RRTM. Our code is available publicly.
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DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
E. Mlawer;D. Turner
通讯作者:
D. Turner
DOI:
10.1016/j.envsoft.2020.104856
发表时间:
2020-09
期刊:
Environ. Model. Softw.
影响因子:
--
作者:
M. Sadeghi;P. Nguyen;K. Hsu;S. Sorooshian
通讯作者:
M. Sadeghi;P. Nguyen;K. Hsu;S. Sorooshian
影响因子:
3.2
作者:
Gagne, David John, II;Haupt, Sue Ellen;Thompson, Gregory
通讯作者:
Thompson, Gregory
DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
J. Stewart;C. Kumler;D. Hall;M. Govett
通讯作者:
M. Govett
影响因子:
5.2
作者:
Gentine, P.;Pritchard, M.;Yacalis, G.
通讯作者:
Yacalis, G.