地球惑星科学専攻 地球科学輻合部特別講演会

日時: 2010年2月2日(火) 16:30 - 17:30
場所: 京都大学理学部1号館 563号室
題目: A Short History of Precipitation Estimates, Space-Based and Otherwise
講演者: Dr. George J. Huffman (NASA/GSFC Laboratory for Atmospheres and Science Systems and Applications, Inc.)

講演要旨:
You can measure rain and snow with the simplest tools - a bucket and a
ruler - yet the most sophisticated remote-sensing tools and algorithms
still fall short of the desired accuracy for quantifying global
precipitation.  Fundamentally, the precipitation retrieval problem is
underdetermined when we have to depend on the data available from the
passive remote sensing instruments flying on satellites. This seminar
reviews the physical basis for how satellites “see” precipitation and
sketches the history of approximate solutions to the retrieval problem.
These range from the earliest constant-coefficient scheme based on
infrared data to current multi-satellite “Lagrangian time interpolation”
algorithms.  As well, the on-going importance of surface data will be
discussed.  We will end by considering outstanding problems, such as
estimating cold-climate precipitation, estimating precipitation over
snowy surfaces, and estimating the variation of precipitation between
satellite overpasses.

問い合わせ先: 重 尚一