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Observation system experiments for Typhoon Jangmi (200815) observed during T-PARC

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Abstract

In this study, the impact of various types of observations on the track forecast of Tropical Cyclone (TC) Jangmi (200815) is examined by using the Weather Research and Forecasting (WRF) model and the corresponding three-dimensional variational (3DVAR) data assimilation system. TC Jangmi is a recurving typhoon that is observed as part of the THORPEX Pacific Asian Regional Campaign (T-PARC). Conventional observations from the Korea Meteorological Administration (KMA) and targeted dropsonde observations from the Dropwindsonde Observations for Typhoon Surveillance near the Taiwan Region (DOTSTAR) were used for a series of observation system experiments (OSEs). We found that the assimilation of observations in oceanic areas is important to analyze environmental flows (such as the North Pacific high) and to predict the recurvature of TC Jangmi. The assimilation of targeted dropsonde observations (DROP) results in a significant impact on the track forecast. Observations of ocean surface winds (QSCAT) and satellite temperature soundings (SATEM) also contribute positively to the track forecast, especially two- to three-day forecasts. The impact of sensitivity guidance such as real-time singular vectors (SVs) was evaluated in additional experiments.

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Authors and Affiliations

  1. Atmospheric Predictability and Data Assimilation Laboratory, Department of Atmospheric Sciences, Yonsei University, Seoul, Korea

    Byoung-Joo Jung & Hyun Mee Kim

  2. Forecast Research Laboratory, National Institute of Meteorological research/KMA, Seoul, Korea

    Yeon-Hee Kim, Eun-Hee Jeon & Ki-Hoon Kim

  3. Department of Atmospheric Sciences, Yonsei University, Shinchon-dong 134, Seodaemun-ku, Seoul, 120-749, Korea

    Hyun Mee Kim

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  1. Byoung-Joo Jung
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  2. Hyun Mee Kim
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  3. Yeon-Hee Kim
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  4. Eun-Hee Jeon
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  5. Ki-Hoon Kim
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Correspondence to Ki-Hoon Kim.

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Jung, BJ., Kim, H.M., Kim, YH. et al. Observation system experiments for Typhoon Jangmi (200815) observed during T-PARC. Asia-Pacific J Atmos Sci 46, 305–316 (2010). https://doi.org/10.1007/s13143-010-1007-y

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  • DOI: https://doi.org/10.1007/s13143-010-1007-y

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