Multipoint Synchronous Monitoring of Cladding Pressures on a 600-m-High Skyscraper during Super Typhoon Mangkhut 2018

2021 ◽  
Vol 147 (7) ◽  
Author(s):  
Xu-Liang Han ◽  
Qiu-Sheng Li ◽  
Xiao Li ◽  
Kang Zhou
Keyword(s):  
Super Typhoon ◽  
Synchronous Monitoring

Rainfall forecast errors in different landfall stages of Super Typhoon Lekima (2019)

2021 ◽  
Author(s):  
Bin He ◽  
Zifeng Yu ◽  
Yan Tan ◽  
Yan Shen ◽  
Yingjun Chen
Keyword(s):  
Forecast Errors ◽  
Super Typhoon ◽  
Rainfall Forecast

Abnormal reverse intrusion of the Kuroshio Branch Current induced by super typhoon soudelor

2021 ◽  
Vol 256 ◽  
pp. 107377
Author(s):  
Haibin Lü ◽  
Yujun Liu ◽  
Yuntao Wang ◽  
Yusheng Cui ◽  
Xinheng Ge ◽  
...  
Keyword(s):  
Super Typhoon ◽  
The Kuroshio

scholarly journals Analysis of Atmospheric and Ionospheric Variations Due to Impacts of Super Typhoon Mangkhut (1822) in the Northwest Pacific Ocean

2021 ◽  
Vol 13 (4) ◽  
pp. 661
Author(s):  
Mohamed Freeshah ◽  
Xiaohong Zhang ◽  
Erman Şentürk ◽  
Muhammad Arqim Adil ◽  
B. G. Mousa ◽  
...  
Keyword(s):  
Wind Speed ◽  
Pacific Ocean ◽  
Tropical Cyclone ◽  
Sea Level ◽  
Northwest Pacific ◽  
Northwest Pacific Ocean ◽  
Sea Level Pressure ◽  
Level Pressure ◽  
Super Typhoon ◽  
The Northwest Pacific Ocean

The Northwest Pacific Ocean (NWP) is one of the most vulnerable regions that has been hit by typhoons. In September 2018, Mangkhut was the 22nd Tropical Cyclone (TC) over the NWP regions (so, the event was numbered as 1822). In this paper, we investigated the highest amplitude ionospheric variations, along with the atmospheric anomalies, such as the sea-level pressure, Mangkhut’s cloud system, and the meridional and zonal wind during the typhoon. Regional Ionosphere Maps (RIMs) were created through the Hong Kong Continuously Operating Reference Stations (HKCORS) and International GNSS Service (IGS) data around the area of Mangkhut typhoon. RIMs were utilized to analyze the ionospheric Total Electron Content (TEC) response over the maximum wind speed points (maximum spots) under the meticulous observations of the solar-terrestrial environment and geomagnetic storm indices. Ionospheric vertical TEC (VTEC) time sequences over the maximum spots are detected by three methods: interquartile range method (IQR), enhanced average difference (EAD), and range of ten days (RTD) during the super typhoon Mangkhut. The research findings indicated significant ionospheric variations over the maximum spots during this powerful tropical cyclone within a few hours before the extreme wind speed. Moreover, the ionosphere showed a positive response where the maximum VTEC amplitude variations coincided with the cyclone rainbands or typhoon edges rather than the center of the storm. The sea-level pressure tends to decrease around the typhoon periphery, and the highest ionospheric VTEC amplitude was observed when the low-pressure cell covers the largest area. The possible mechanism of the ionospheric response is based on strong convective cells that create the gravity waves over tropical cyclones. Moreover, the critical change state in the meridional wind happened on the same day of maximum ionospheric variations on the 256th day of the year (DOY 256). This comprehensive analysis suggests that the meridional winds and their resulting waves may contribute in one way or another to upper atmosphere-ionosphere coupling.

Observations and Modeling of Coastal Boulder Transport and Loading During Super Typhoon Haiyan

2016 ◽  
Vol 58 (1) ◽  
pp. 1640004-1-1640004-25 ◽  
Author(s):  
Andrew B. Kennedy ◽  
Nobuhito Mori ◽  
Yao Zhang ◽  
Tomohiro Yasuda ◽  
Shen-En Chen ◽  
...  
Keyword(s):  
Super Typhoon

Storm-induced circulation in the Pearl River Estuary of China during super Typhoon Koryn

2012 ◽  
Vol 47 (3-4) ◽  
pp. 314-332 ◽  
Author(s):  
Liqun Tang ◽  
Jinyu Sheng ◽  
Yuhan Cai
Keyword(s):  
Northern South China Sea ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Horizontal Resolution ◽  
Pearl River ◽  
Study Region ◽  
Near Surface ◽  
The Pearl River Estuary ◽  
Super Typhoon ◽  
The Pearl River

This study presents a numerical investigation of storm-induced circulation and hydrographic distributions over the Pearl River Estuary (PRE) in South China's Guangdong Province during super Typhoon Koryn in June 1993. The nested-grid modelling system used in this study has three downscaling subcomponents: an outer-most sub-model with a coarse horizontal resolution of ∼7 km for simulating surface elevations and depth-mean currents forced by wind and tides over China Seas from Bohai Sea to the northern South China Sea; and an inner-most sub-model with a fine resolution of ∼1.2 km for simulating the three-dimensional estuarine circulation and hydrographic distributions in the PRE and adjacent waters. A parametric vortex is inserted into the coarse-resolution (0.5°) numerical weather forecast products to better represent the atmospheric pressure and wind stress associated with Koryn. Model results demonstrate that large surface elevations and intense surface currents are generated over the area of influence of the storm. Lagrange velocities of near-surface particles are also used to examine the effect of the storm on the movements and dispersion of near-surface particles over the study region.

scholarly journals Impact of Sea Spray and Sea Surface Roughness on the Upper Ocean Response to Super Typhoon Haitang (2005)

2021 ◽  
Author(s):  
Lianxin Zhang ◽  
Xuefeng Zhang ◽  
William Perrie ◽  
Changlong Guan ◽  
Bo Dan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Ocean Waves ◽  
Sea Surface ◽  
Sea Spray ◽  
Upper Ocean ◽  
Surface Cooling ◽  
Super Typhoon ◽  
Sea Surface Roughness ◽  
Momentum Fluxes ◽  
The Right

AbstractA coupled ocean-wave-sea spray model system is used to investigate the impacts of sea spray and sea surface roughness on the response of the upper ocean to the passage of the super typhoon Haitang. Sea spray mediated heat and momentum fluxes are derived from an improved version of Fairall’s heat fluxes formulation (Zhang et al., 2017) and Andreas’s sea spray-mediated momentum flux models. For winds ranging from low to extremely high speeds, a new parameterization scheme for the sea surface roughness is developed, in which the effects of wave state and sea spray are introduced. In this formulation, the drag coefficient has minimal values over the right quadrant of the typhoon track, along which the typhoon-generated waves are longer, smoother, and older, compared to other quadrants. Using traditional interfacial air-sea turbulent (sensible, latent, and momentum) fluxes, the sea surface cooling response to typhoon Haitang is overestimated by 1 °C, which can be compensated by the effects of sea spray and ocean waves on the right side of the storm. Inclusion of sea spray-mediated turbulent fluxes and sea surface roughness, modulated by ocean waves, gives enhanced cooling along the left edges of the cooling area by 0.2 °C, consistent with the upper ocean temperature observations.

scholarly journals Characteristics of the Concentric Eyewall Structure of Super Typhoon Muifa during Its Formation and Replacement Processes

2019 ◽  
Author(s):  
Tonggui Bo ◽  
Yudi Liu ◽  
Dawei Li ◽  
Lang Huang ◽  
Yi Yu
Keyword(s):  
Boundary Layer ◽  
Wind Speed ◽  
Lower Troposphere ◽  
Super Typhoon ◽  
Early Signal ◽  
Tangential Wind ◽  
Radar Echo ◽  
Vertical Wind Speed ◽  
Potential Vortex ◽  
Physical Quantities

To explore the characteristics of the concentric eyewall of a typhoon during its formation and replacement processes, with Super Typhoon Muifa in 2011 as the example case, the Weather Research and Forecast (WRF) mode was used to carry out a numerical simulation to reproduce the entire formation and replacement processes of the concentric eyewall. The physical quantities such as the tangential wind speed, radar echo, radial wind speed, vertical wind speed, and potential vortex were diagnosed and analyzed. The results of the analysis show that the outward expansion of the isovelocity in the lower troposphere was the early signal of the formation of the outer eyewall. After the outer eyewall formed, there was a center of second-highest tangential wind speed in the corresponding area. The second-highest wind speed increased as the strength of the outer eyewall increased, and the position of the second-highest wind speed center was retracted with the retraction of the outer eyewall. The tangential wind speed of the moat area was smaller than that corresponding to the concentric eyewall and this feature gradually disappeared with the increase of the height. The echo in the moat area was weak, and this characteristic was particularly evident when the moat area was relatively wide and the outer eyewall was relatively strong. With the formation and development of the outer eyewall, the intensity of the inflow in the boundary layer corresponding to the inner eyewall was reduced, the intensity of the outflow in the upper layers declined, and the intensities of the inflow and outflow corresponding to the outer eyewall were enhanced. After the second outer eyewall matured, there was a significant inflow in the upper layer of the moat area. Once the outer eyewall formed, a large amount of hydrometeors appeared in the corresponding area, and there was a strong ascending motion inside that area. The strength of the ascending motion and the content of hydrometeors increased as the outer eyewall increased. When the moat area was relatively wide, the divergent airflow generated by the developed outer eyewall in the upper layer would produce a significant descending motion in the moat area.

scholarly journals VAZÃO DE GOTEJADORES APLICANDO ESGOTO SANITÁRIO TRATADO E PREVENÇÃO DO ENTUPIMENTO COM CATALISADOR ENZIMÁTICO

2019 ◽  
Vol 12 (2) ◽  
pp. 679
Author(s):  
Ketson Bruno da Silva ◽  
Rafael Oliveira Batista ◽  
Daniela da Costa Leite Coelho ◽  
Blake Charles Diniz Marques ◽  
Francisco de Oliveira Mesquita ◽  
...  
Keyword(s):  
Super Typhoon

O reúso da água é uma importante ação da gestão integrada dos recursos hídricos que possibilita a convivência com a escassez hídrica no semiárido brasileiro. O sistema de irrigação por gotejamento é o mais adequado para aplicação de esgoto sanitário tratado, entretanto o entupimento de emissores consiste no principal obstáculo à adoção desta tecnologia. Neste sentido, este trabalho objetivou estudar a vazão de gotejadores operando com esgoto sanitário tratado, bem como a prevenção da obstrução por meio do uso de catalisador enzimático. Para isto, foram montadas duas bancadas experimentais para avaliação, a cada 80 h, da vazão de quatro tipos de gotejadores, aplicando esgoto sanitário tratado durante 400 h. O experimento foi montado em esquema de parcelas subsubdivididas, no delineamento inteiramente casualizado (DIC) com três repetições. Tendo nas parcelas as dosagens de catalisador enzimático (T1 - unidade gotejadora que operou sem aplicação do catalisador; T2 - unidade gotejadora que recebeu 100 ml de catalisador, a cada 80 h; T3 - unidade gotejadora que recebeu 200 ml de catalisador, a cada 80 h; e T4 - unidade gotejadora que recebeu 300 ml de catalisador, a cada 80 h, nas subparcelas os tipos de gotejadores (Netafim Super Typhoon, Netafim Tiran, Netafim Streamline e Naan Dan Jain Tal Drip) e nas subsubparcelas os períodos das avaliações da vazão dos gotejadores (0, 80, 160, 240, 320 e 400 h). O catalisador enzimático não preveniu a obstrução dos gotejadores em função da elevada concentração de cloreto no esgoto sanitário tratado. Os modelos de regressão cúbico, quadrático e linear foram os que melhor se ajustaram aos dados de vazão em função dos tempos de operação mediante tratamento biológico. As análises de regressão linear múltipla revelaram que os atributos SD, SS e pH foram os que mais interferiram no processo de entupimento dos gotejadores aplicando esgoto sanitário tratado.

Sign in / Sign up

Export Citation Format

Share Document