AntAir: satellite-derived 1 km daily Antarctic air temperatures since 2003 [post]

Hanna Meyer, Marwan Katurji, Florian Detsch, Fraser Morgan, Thomas Nauss, Pierre Roudier, Peyman Zawar-Reza
2019 unpublished
<p><strong>Abstract.</strong> Air temperature is an important baseline parameter for terrestrial Antarctica in the context of patterns and processes in climatology, hydrology or ecology. There are still large uncertainties on how the Antarctic system responds to spatio-temporal variability of temperature. This can partly be attributed to the lack of high resolution datasets. In this paper, we present AntAir, a new dataset of gridded air temperatures in 1 km spatial
more » ... ;#8201;km spatial and daily temporal resolution that is available since 2003. AntAir was created by modelling daily air temperature from MODIS land surface temperature using machine learning algorithms. Data from 70 weather stations was used as a reference. Daily temperatures could be estimated with a <i>R</i><sup>2</sup> of 0.91 and a RMSE of 5.07 °C validated on independent years. The performance to estimate the time series of a new spatial location was <i>R</i><sup>2</sup> = 0.78 and RMSE = 5.83 °C. Hence the high spatial and temporal resolution of the dataset as well as the high accuracy make AntAir an important baseline dataset for a wide range of applications in environmental science of Antarctica. The dataset is available at <a href="https://doi.pangaea.de/10.1594/PANGAEA.902166" target="_blank">https://doi.pangaea.de/10.1594/PANGAEA.902166</a> (daily, Meyer et al., 2019a) and <a href="https://doi.pangaea.de/10.1594/PANGAEA.902193" target="_blank">https://doi.pangaea.de/10.1594/PANGAEA.902193</a> (monthly, Meyer et al., 2019b).</p>
doi:10.5194/essd-2019-215 fatcat:k7muvp2rjfb57nxdurcqvs5b7m