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Remote Sens. 2014, 6(9), 8387-8404; doi:10.3390/rs6098387

Retrievals of All-Weather Daily Air Temperature Using MODIS and AMSR-E Data

1
Department of Environmental Science, Kangwon National University, Chuncheon 200-701, Korea
2
Flathead Lake Biological Station, Division of Biological Sciences, The University of Montana, Polson, MT 59860, USA
3
Department of Agricultural Environment, National Academy of Agricultural Science, Suwon 441-701, Korea
*
Author to whom correspondence should be addressed.
Received: 15 July 2014 / Revised: 29 August 2014 / Accepted: 2 September 2014 / Published: 5 September 2014
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Abstract

Satellite optical-infrared remote sensing from the Moderate Resolution Imaging Spectroradiometer (MODIS) provides effective air temperature (Ta) retrieval at a spatial resolution of 5 km. However, frequent cloud cover can result in substantial signal loss and remote sensing retrieval error in MODIS Ta. We presented a simple pixel-wise empirical regression method combining synergistic information from MODIS Ta and 37 GHz frequency brightness temperature (Tb) retrievals from the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) for estimating surface level Ta under both clear and cloudy sky conditions in the United States for 2006. The instantaneous Ta retrievals showed favorable agreement with in situ air temperature records from 40 AmeriFlux tower sites; mean R2 correspondence was 86.5 and 82.7 percent, while root mean square errors (RMSE) for the Ta retrievals were 4.58 K and 4.99 K for clear and cloudy sky conditions, respectively. Daily mean Ta was estimated using the instantaneous Ta retrievals from day/night overpasses, and showed favorable agreement with local tower measurements (R2 = 0.88; RMSE = 3.48 K). The results of this study indicate that the combination of MODIS and AMSR-E sensor data can produce Ta retrievals with reasonable accuracy and relatively fine spatial resolution (~5 km) for clear and cloudy sky conditions. View Full-Text
Keywords: air temperature; MODIS; brightness temperature; AMSR-E air temperature; MODIS; brightness temperature; AMSR-E
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Jang, K.; Kang, S.; Kimball, J.S.; Hong, S.Y. Retrievals of All-Weather Daily Air Temperature Using MODIS and AMSR-E Data. Remote Sens. 2014, 6, 8387-8404.

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