Seasonal variation analysis of Greenland ice mass time-series
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We derive the mass balance of Greenland ice sheet from the gravity recovery and climate experiment (GRACE) for the period January 2003 to October 2014. We find an ice mass loss with peak amplitude of -15 cm/year in the southeastern and northwestern parts, and an acceleration of -2.5 cm/year2 in the southwestern region. Global warming is a well-known triggering factor of ice melting. We use MODIS-derived Ice Surface Temperature (IST) and continuous and cross wavelet transform to investigate the common power and relative phase between GRACE derived time-series of ice mass changes and IST time-series in Greenland. Results indicate a high common power between the two time-series for the whole study period, but with different time patterns.