@InCollection{CintraCamp:2018:DaAsAr,
author = "Cintra, Rosangela Saher Corr{\^e}a and Campos Velho, Haroldo
Fraga de",
title = "Data assimilation by artificial neural networks for an atmospheric
general circulation model",
booktitle = "Advanced applications for artificial neural Networks",
publisher = "Intech",
year = "2018",
editor = "El-Shahat, A.",
pages = "265--285",
address = "Janeza Trdine (Rijeka) Croatia",
keywords = "Artificial neural networks, Data assilimation, Numerical weather
prediction, Computer performance, Ensemble Kalman filter.",
abstract = "Numerical weather prediction (NWP) uses atmospheric general
circulation models (AGCMs) to predict weather based on current
weather conditions. The process of entering observation data into
mathematical model to generate the accurate initial conditions is
called data assimilation (DA). It combines observations,
forecasting, and filtering step. This paper presents an approach
for employing artificial neural networks (NNs) to emulate the
local ensemble transform Kalman filter (LETKF) as a method of data
assimilation. This assimilation experiment tests the Simplified
Parameterizations PrimitivE-Equation Dynamics (SPEEDY) model, an
atmospheric general circulation model (AGCM), using synthetic
observational data simulating localizations of meteorological
balloons. For the data assimilation scheme, the supervised NN, the
multilayer perceptrons (MLPs) networks are applied. After the
training process, the method, forehead-calling MLP-DA, is seen as
a function of data assimilation. The NNs were trained with data
from first 3 months of 1982, 1983, and 1984. The experiment is
performed for January 1985, one data assimilation cycle using
MLP-DA with synthetic observations. The numerical results
demonstrate the effectiveness of the NN technique for atmospheric
data assimilation. The results of the NN analyses are very close
to the results from the LETKF analyses, the differences of the
monthly average of absolute temperature analyses are of order 102.
The simulations show that the major advantage of using the MLP-DA
is better computational performance, since the analyses have
similar quality. The CPU-time cycle assimilation with MLP-DA
analyses is 90 times faster than LETKF cycle assimilation with the
mean analyses used to run the forecast experiment.",
affiliation = "{} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
isbn = "9789535137801",
label = "lattes: 5142426481528206 2 CintraCamp:2018:DaAsAr",
language = "en",
targetfile = "cintra_data.pdf",
url = "https://www.intechopen.com/books/advanced-applications-for-artificial-neural-networks/data-assimilation-by-artificial-neural-networks-for-an-atmospheric-general-circulation-model",
urlaccessdate = "27 abr. 2024"
}