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Remote Sens. 2012, 4(12), 3833-3856; doi:10.3390/rs4123833
Article

Pan-Arctic Land Surface Temperature from MODIS and AATSR: Product Development and Intercomparison

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Received: 12 October 2012; in revised form: 26 November 2012 / Accepted: 27 November 2012 / Published: 5 December 2012
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Abstract: Models and observations show that the Arctic is experiencing the most rapid changes in global near-surface air temperature. We developed novel EASE-grid Level 3 (L3) land surface temperature (LST) products from Level 2 (L2) AATSR and MODIS data to provide weekly, monthly and annual LST means over the pan-Arctic region at various grid resolutions (1–25 km) for the past decade (2000–2010). In this paper, we provide: (1) a review of previous validation of MODIS/AATSR L2; (2) a description of the processing chain of L3 products; (3) an assessment of the 25 km products uncertainty, and; (4) a quantification of the bias introduced by over-representing clear-sky days in MODIS L3 products. In addition, we generated uncertainty maps by comparing L3 products with LST from passive microwave sensors (AMSR-E and SSM/I) and the North American Regional Reanalysis (NARR). Results show a close correspondence between MODIS and AATSR monthly products with a mean-difference (MD) of −1.1 K. Comparing L3 products with NARR indicates a close agreement in summer and a systematic bias in winter, which is entirely negative with respect to MODIS L3 (MD: −3.6, Min: −6.8, Max: −1 K). Comparing monthly averaged MODIS L3 to NARR clear-sky to quantify over-representing clear-sky days indicates a decrease of winter and an increase of summer difference compared to NARR all-sky. Finally, we provide suggestions to improve LST retrieval over Arctic regions.
Keywords: land surface temperature; Arctic; AATSR; MODIS; passive microwave; atmospheric reanalysis land surface temperature; Arctic; AATSR; MODIS; passive microwave; atmospheric reanalysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Soliman, A.; Duguay, C.; Saunders, W.; Hachem, S. Pan-Arctic Land Surface Temperature from MODIS and AATSR: Product Development and Intercomparison. Remote Sens. 2012, 4, 3833-3856.

AMA Style

Soliman A, Duguay C, Saunders W, Hachem S. Pan-Arctic Land Surface Temperature from MODIS and AATSR: Product Development and Intercomparison. Remote Sensing. 2012; 4(12):3833-3856.

Chicago/Turabian Style

Soliman, Aiman; Duguay, Claude; Saunders, William; Hachem, Sonia. 2012. "Pan-Arctic Land Surface Temperature from MODIS and AATSR: Product Development and Intercomparison." Remote Sens. 4, no. 12: 3833-3856.


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