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The Estimation of Arctic Air Temperature in Summer Based on Machine Learning Approaches Using IABP Buoy and AMSR2 Satellite Data

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Title
The Estimation of Arctic Air Temperature in Summer Based on Machine Learning Approaches Using IABP Buoy and AMSR2 Satellite Data
Other Titles
기계학습 기반의 IABP 부이 자료와AMSR2 위성영상을 이용한 여름철 북극 대기 온도 추정
Authors
Han, Daehyeon
Kim, Young Jun
Im, Jungho
Lee, Sanggyun
Lee, Yeonsu
Kim, Hyun-cheol
Subject
Other natural science
Keywords
Arctic surface air temperature; Buoy; AMSR2; the International Arctic Bouy Programme; Random Forest; Support Vector Machine
Issue Date
2018-12
Citation
Han, Daehyeon, et al. 2018-12. "The Estimation of Arctic Air Temperature in Summer Based on Machine Learning Approaches Using IABP Buoy and AMSR2 Satellite Data". Korean Journal of Remote Sensing, 34(6-2): 1261-1272.
Abstract
It is important to measure the Arctic surface air temperature because it plays a key-role in the exchange of energy between the ocean, sea ice, and the atmosphere. Although in-situ observations provide accurate measurements of air temperature, they are spatially limited to show the distribution of Arctic surface air temperature. In this study, we proposed machine learning-based models to estimate the Arctic surface air temperature in summer based on buoy data and Advanced Microwave Scanning Radiometer 2 (AMSR2) satellite data. Two machine learning approaches-random forest (RF) and support vector machine (SVM)-were used to estimate the air temperature twice a day according to AMSR2 observation time. Both RF and SVM showed R2 of 0.84-0.88 and RMSE of 1.31-1.53°C. The results were compared to the surface air temperature and spatial distribution of the ERA-Interim reanalysis data from the European Center for Medium-Range Weather Forecasts (ECMWF). They tended to underestimate the Barents Sea, the Kara Sea, and the Baffin Bay region where no IABP buoy observations exist. This study showed both possibility and limitations of the empirical estimation of Arctic surface temperature using AMSR2 data.
URI
https://repository.kopri.re.kr/handle/201206/10612
DOI
http://dx.doi.org/10.7780/kjrs.2018.34.6.2.10
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