Impact of Wind Profile Retrievals on the Analysis of Tropical Cyclones in the JRA-25 Reanalysis

スポンサーリンク

概要

• 論文の詳細を見る

• A new long-term reanalysis project, JRA-25, has set as one of its main goals the realistic representation of tropical cyclones (TCs) in the reanalysis. To supplement in situ observations near TCs, wind profile data (TCR data) are retrieved based on best track information and assimilated. This paper addresses the benefits of using TCR data for the analysis of TCs. TC representation in the JRA-25 reanalysis is compared with other reanalysis data, and an experimental reanalysis (Control) without TCR data. The general result is that JRA-25 successfully represents the location and intensity of each TC. Among TC basins in the Northern Hemisphere, the TC representation in the JRA-25 data in the eastern North Pacific, and in the tropical Atlantic, where upper observations are sparse, is superior compared to other datasets that did not assimilate TCR data. In the western North Pacific, especially around Japan and the East China Sea, TCR data give little improvement in TC representation, since conventional upper observations are dense there and upstream of the active TC regions. TC detection rates in the Northern basins and over the entire globe, are computed using an objective procedure from the reanalysis datasets. The rate in JRA-25 is the highest in all basins among the datasets, and consistent through the period. The high qualified TC representation in intensity and location has a positive effect on a flow field, and hydrologic cycle around TCs. Case studies of TC track forecasts for a recurving TC, in which reanalysis data are used as initial conditions, suggest the JRA-25 data are more realistic than the Control. For these reasons, TCR data is effective in representing TCs and surrounding atmospheric conditions in JRA-25.

• 社団法人日本気象学会の論文
• 2006-10-25

著者

• ONOGI Kazutoshi

  Japan Meteorological Agency

• TSUTSUI Junichi

  Central Research Institute of Electric Power Industry

• HATSUSHIKA Hiroaki

  Central Research Institute of Electric Power Industry

• Tsutsui Junichi

  Central Res. Inst. Of Electric Power Ind.

• Hatsushika Hiroaki

  Central Research Institute Of Electric Power Industry:toyama Prefectural Environmental Science Resea

• FIORINO Michael

  Lawrence Livermore National Laboratory

関連論文

• The JRA-25 Reanalysis
• Preface(Special Edition on the JRA-25 Reanalysis
• Impact of Wind Profile Retrievals on the Analysis of Tropical Cyclones in the JRA-25 Reanalysis
• Implications of Anthropogenic Climate Change for Tropical Cyclone Activity : A Case Study with the NCAR CCM2
• Stabilization of atmospheric carbon dioxide via zero emissions—An alternative way to a stable global environment. Part 2: A practical zero-emissions scenario
• Stabilization of atmospheric carbon dioxide via zero emissions—An alternative way to a stable global environment. Part 1: Examination of the traditional stabilization concept

スポンサーリンク