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Title: Forecasting Climatic Trends Using Neural Networks: An Experimental Study Using Global Historical Data
Authors: Ise, Takeshi
Oba, Yurika
Author's alias: 伊勢, 武史
大庭, ゆりか
Keywords: climate change
neural networks
big data
historical data
NVIDIA DIGITS
top-down approach
graphical image classification
global environmental change
Issue Date: 26-Apr-2019
Publisher: Frontiers Media SA
Journal title: Frontiers in Robotics and AI
Volume: 6
Thesis number: 32
Abstract: Climate change is undoubtedly one of the biggest problems in the 21st century. Currently, however, most research efforts on climate forecasting are based on mechanistic, bottom-up approaches such as physics-based general circulation models and earth system models. In this study, we explore the performance of a phenomenological, top-down model constructed using a neural network and big data of global mean monthly temperature. By generating graphical images using the monthly temperature data of 30 years, the neural network system successfully predicts the rise and fall of temperatures for the next 10 years. Using LeNet for the convolutional neural network, the accuracy of the best global model is found to be 97.0%; we found that if more training images are used, a higher accuracy can be attained. We also found that the color scheme of the graphical images affects the performance of the model. Moreover, the prediction accuracy differs among climatic zones and temporal ranges. This study illustrated that the performance of the top-down approach is notably high in comparison to the conventional bottom-up approach for decadal-scale forecasting. We suggest using artificial intelligence-based forecasting methods along with conventional physics-based models because these two approaches can work together in a complementary manner.
Description: ディープラーニングにより精度97%で気温の上下を推定する手法を開発 --疑似カラー画像による効率的な自動識別--. 京都大学プレスリリース. 2019-04-26.
Rights: © 2019 Ise and Oba. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
URI: http://hdl.handle.net/2433/241058
DOI(Published Version): 10.3389/frobt.2019.00032
Related Link: http://www.kyoto-u.ac.jp/ja/research/research_results/2019/190426_1.html
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