Evaluating Global Precipitation Measurement Mission in the High Latitudes: A Case Study in Canada

Authors: Beatriz Aguilar*, CSULA
Topics: Remote Sensing, Earth Science, Climatology and Meteorology
Keywords: Climate Studies, Satellite precipitation products, GPM, NASA
Session Type: Poster
Day: 4/13/2018
Start / End Time: 10:00 AM / 11:40 AM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded

Precipitation is a vital component in the water cycle. Measuring accurate precipitation is significant because it is important to know when, where, and how much precipitation is occurring. Precipitation has commonly been measured using ground-based devices such as rain gauges and ground radars. Although these methods have worked well, their spatial coverage is restricted to land. With the development of satellite precipitation products, it is possible to obtain measurements at high spatial and temporal resolution. Satellite precipitation products can help get a better understanding of the Earth’s water distribution as well as improve the forecasting for extreme precipitation events. However, satellite products are prone to error, which make it necessary to evaluate their performances. The objective of the study is to assess the quality of the Global Precipitation Measurement (GPM) mission in the high latitudes. This study will use GPM Integrated Multi-satellitE Retrievals (IMERG), which is a data product that uses an algorithm that combines all passive-microwave instruments in the GPM satellite Constellation into half-hourly precipitation estimates. The performance of GPM-IMERG will be evaluated by comparing the estimates against ground-base observations over the high latitudes, mainly focusing on Canada from April 2014 to October 2017. For the evaluation, various statistical measures will be applied in order to investigate the performances such as root mean square error, correlation coefficient, bias and other factors derived from the contingency table.

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