气候变化领域集成服务门户(CCPortal): Effects of the Assimilation of Relative Humidity Reproduced From T-PARCII and Himawari-8 Satellite Imagery Using Dynamical Initialization and Ocean-Coupled Model: A Case Study of Typhoon Lan (2017)

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DOI	10.1029/2020JD034516
	Effects of the Assimilation of Relative Humidity Reproduced From T-PARCII and Himawari-8 Satellite Imagery Using Dynamical Initialization and Ocean-Coupled Model: A Case Study of Typhoon Lan (2017)
	Lee J.-D.; Park D.-S.R.; Ito K.; Wu C.-C.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	Effects of the assimilation of relative humidity (RH) reproduced from dropsonde data from the Tropical cyclones-Pacific Asian Research Campaign for Improvement of Intensity estimations/forecasts (T-PARCII) campaign and Himawari-8 satellite data on the simulation of Typhoon Lan (2017) were investigated herein using a weather research and forecasting model. The lateral boundary and initial conditions were obtained from Global Forecast System (GFS) forecast data. Four experiments varying from the initial vortex, assimilation of the reproduced RH (ARH), and ocean model (OCEAN, three-dimensional Price-Weller-Pinkel upper-ocean circulation model) activation were conducted for 42 h to evaluate tropical cyclone (TC) forecast performance: the GFS experiment and dynamical initialization (DI) experiments such as DI, DI-OCEAN, and DI-ARH-OCEAN, respectively. All track forecast errors were less than 100 km until landfall, that is, up to 36 h. TC intensity forecasts such as the minimum sea-level pressure and maximum surface wind speed were slightly improved in DI-related experiments compared to the GFS experiment. The DI-ARH-OCEAN experiment, in particular, demonstrated improvements in both TC forecasts and convective areas. The ocean-coupled experiments yielded significant sea surface temperature cooling in the rear-right quadrant of TC, forming a stable boundary layer that could suppress the convective activity, particularly in the lower troposphere. These findings support that compared to the original DI method, ARH could improve initial conditions, resulting in more accurate TC forecasts. Furthermore, it may argue the necessity and urgency of regular aircraft surveillance of TCs in the western North Pacific area. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	data assimilation; dynamic initialization; tropical cyclone; WRF
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237053
作者单位	Department of Earth Science Education, Kyungpook National University, Daegu, South Korea; Department of Physics and Earth Sciences, University of the Ryukyus, Okinawa, Japan; Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Lee J.-D.,Park D.-S.R.,Ito K.,et al. Effects of the Assimilation of Relative Humidity Reproduced From T-PARCII and Himawari-8 Satellite Imagery Using Dynamical Initialization and Ocean-Coupled Model: A Case Study of Typhoon Lan (2017)[J],2021,126(17).
APA	Lee J.-D.,Park D.-S.R.,Ito K.,&Wu C.-C..(2021).Effects of the Assimilation of Relative Humidity Reproduced From T-PARCII and Himawari-8 Satellite Imagery Using Dynamical Initialization and Ocean-Coupled Model: A Case Study of Typhoon Lan (2017).Journal of Geophysical Research: Atmospheres,126(17).
MLA	Lee J.-D.,et al."Effects of the Assimilation of Relative Humidity Reproduced From T-PARCII and Himawari-8 Satellite Imagery Using Dynamical Initialization and Ocean-Coupled Model: A Case Study of Typhoon Lan (2017)".Journal of Geophysical Research: Atmospheres 126.17(2021).