改进风暴潮建模的气象输入比较评估:热带气旋瓦尤的案例研究

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Pubali Mukherjee, Rajendiran S, Beulah Hepzibah Ravikumar, Balaji Ramakrishnan
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引用次数: 0

摘要

风暴潮气象输入的选择至关重要,风场和气压场在能量传递和研究区域的水深测量中起着重要作用。在过去十年中,使用观测到的轨迹信息进行风力和压力下降的预测一直是标准方法,但最近的研究突出表明,在风暴潮预测中需要气象研究和预测模型(WRF)等模型的大气输入。本研究旨在比较 DELFT-3D FM 风暴潮模型的性能,该模型采用了 IMD(印度气象局)观测到的最佳路径和压力降(EXP-1)以及 WRF 的风场和压力场(EXP-2),用于预测 2019 年 6 月发生在阿拉伯海盆地南部的热带气旋 "瓦尤"。该研究比较了模拟的风暴水位,并强调了使用时空变化的风压输入改进浪涌表示的好处。结果表明,WRF-DELFT 设置优于 IMD-DELFT 设置,尤其是在靠近风暴眼的验潮位置。模拟的风暴潮捕捉到了 "瓦尤 "的加强阶段,比使用 IMD 跟踪数据的模型提供了更真实的表现。然而,也发现了一些偏差和局限性,如对陆地表面参数化的表述不够充分。研究建议进一步探索波浪对总水位和多种气旋情景的影响,以提高风速和路径位移预测的准确性,改进海陆参数化有助于解决这些局限性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative evaluation of meteorological inputs for improved storm surge modeling: A case study of tropical Cyclone Vayu

The selection of meteorological inputs in storm surge is crucial, with wind and pressure fields playing a significant role in energy transfer and the study area's bathymetry. While using observed track information for wind and pressure drop has been the standard approach for the past decade, recent studies have highlighted the need for atmospheric inputs from models like the Weather Research and Forecast model (WRF) for storm surge forecast. This study aims to compare the performance of a DELFT-3D FM storm surge model forced with inputs from IMD (India Meteorological Department) observed the best track and pressure drop (EXP-1) and wind and pressure fields from WRF (EXP-2) for Tropical Cyclone Vayu, which occurred in the southern Arabian Sea basin in June 2019. The study compares the simulated storm water levels and highlights the benefits of using time and space-varying wind and pressure input for improved surge representation. Results show that the WRF-DELFT setup outperforms the IMD-DELFT setup, particularly for tide gauge locations close to the storm eye. The simulated storm surge captures the intensified stage of Vayu and provides a more realistic representation than the model forced with IMD track data. However, biases and limitations, such as inadequate representation of land surface parameterization, are identified. The study suggests further exploring wave-induced effects on total water level and multiple cyclone scenarios to enhance wind speed and track displacement prediction accuracy and improved land-sea parameterization can help address these limitations.

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来源期刊
Dynamics of Atmospheres and Oceans
Dynamics of Atmospheres and Oceans 地学-地球化学与地球物理
CiteScore
3.10
自引率
5.90%
发文量
43
审稿时长
>12 weeks
期刊介绍: Dynamics of Atmospheres and Oceans is an international journal for research related to the dynamical and physical processes governing atmospheres, oceans and climate. Authors are invited to submit articles, short contributions or scholarly reviews in the following areas: •Dynamic meteorology •Physical oceanography •Geophysical fluid dynamics •Climate variability and climate change •Atmosphere-ocean-biosphere-cryosphere interactions •Prediction and predictability •Scale interactions Papers of theoretical, computational, experimental and observational investigations are invited, particularly those that explore the fundamental nature - or bring together the interdisciplinary and multidisciplinary aspects - of dynamical and physical processes at all scales. Papers that explore air-sea interactions and the coupling between atmospheres, oceans, and other components of the climate system are particularly welcome.
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