Evaluation of surface mass balance in the Greenland ice sheet, using data assimilation method

2015 Fiscal Year Final Research Report

• Project/Area Number: 25550048
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental impact assessment
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: SUZUKI Kazuyoshi 国立研究開発法人海洋研究開発機構, 地球表層物質循環研究分野, 主任技術研究員 (90344308)
• Research Collaborator: ZUPANSKI Milija コロラド州立大学, 主任研究員 ; MERNILD Sebastian Sogn Og Fjordane University College, 教授
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: データ同化

Outline of Final Research Achievements

The purpose of this study was to develop a new mass balance estimation method for the Greenland ice sheet that can link climate models and observational data in a coordinated manner. To this end, we invented an atmosphere/land-surface coupling data assimilation system. The model utilized the World Research and Forecasting model (WRF), as well as Gravity Recovery and Climate Experiment (GRACE) data and meteorological observational data, as observational data. First, by utilizing coupling forecasting error covariance, modification of the atmosphere with land surface observational information was enabled. Furthermore, by assimilating data from both the atmosphere and GRACE data, the mass balance of both the atmosphere and Greenland could be improved. Hereafter, we intend to verify the accuracy of the reanalysis data as well as conduct long-term reanalysis.

Free Research Field

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