Questions related to Cyclones
Weather forecast has utmost importance in Aviation, Ship routing, safety measures, planning and designing of structures, urban areas, offshore maintenance, natural resources, coastal areas, Agriculture, pollutants management and in many more weather applications in world wide.
I'm working on Mediterranean Cyclogenesis using Melborn university Algorithm. Actually I got in trouble with tracking part. Is there somebody can help me in this regard?
I have two datasets. One with 9 past cyclones with their damage on the forest, wind speed, distance from the study site, recovery area. Another dataset with future sea-level rise (SLR) projections and potential loss area due to SLR.
- By using data from both disturbance events datasets (loss area, recovery area, wind speed, predicted loss area from SLR) can I create any kinds of disturbance risk/vulnerability/disturbance index/ hazard indicator map of the study area?
- What kinds of statistical analysis can I include in my study with these limited data sets which will help me to show some sort of relationship of "Loss Area" with other variables?
I am sorting cyclones (35 years 1985-2019) that were intensified or dissipated rapidly.
While doing this I need a procedure to adopt for the classification of intensification or dissipation.
Would you kindly guide me in this regard, please
I am looking for a solution to perform the cross-track analysis of a tropical cyclone. This means plotting certain parameters across the track of cyclones. This is having x-axis with the time evolution of 5 days prior to the genesis of the cyclone and goes up to the 20th day since its generation and Y-axis shows the distance from the left-hand side (i.e. -300 km or -3 degrees) to the right-hand side (i.e. 300 km or 3 degrees) of the cyclone track.
I hope it is a very frequent analysis usually done in the cyclone study. Looking forward to your technical help in developing the code in NCL/Matlab/Python/Ferret.
I have been carrying out an ANSYS Fluent CFD analysis of the system outlined in this paper:
Broadly speaking, my results are as expected for the setup and I'm very happy with them. However, I am missing one crucial aspect; the cyclone cooling effect shown in Fig. 6 is not observed in my results. I'm confused as to why this is the case. The air accelerates and swirls as expected. I have tried modelling the air using the Boussinesq approximation, as an ideal gas and as a real gas but the issue persists. Perhaps I'm not fully grasping the mechanism causing this cooling.
I'm not 100% sure the boundary conditions I set up are correct. Both the inlet and outlet are pressure boundaries with 0Pa gauge pressure. The inlet is at 300K and the backflow from the outlet is at 288K. I wasn't sure if I should set the gauge pressure for the outlet to a negative value to account for the change in pressure with altitude, or if the system deals with this. The solar flux is modelled by using the inbuilt solar loading and works as expected creating a temperature rise across the collector. Even velocities of the updraft are of the correct order according to quick calculations. I'm a bit lost as to where I have gone wrong, any help would be appreciated.
I am currently working on coastal water quality assessment. I need the impacts of SST on tropical cyclone formation and its related processes.
The question is about gaining more information and knowledge about cyclones which have shown increment in number in the recent years. Does we as a researcher can communicate some pre-measures to save damage to life and property.
I would like to know the method of calculation. I mean which attribute(variable) needed from the data and how to calculate. I knew about the trends from the article linked below.
1. Earlier the observations that there were increasing heavy rain in short time frame was observed for around 20 years in Ahmedabad / Gujarat.
2. Now the observations about the cyclones. The present 'Tauktae' 2021 has indicated that the cyclone strength has increased with time.
3. Extreme heat in summer was also observed, with slightly increasing the heat load and number of days the heat remains were also present.
Does all these observations indicate that, the extreme events are increasing with time (years).
I am not the climate specialist, but a researcher. The above observations indeed poses a question in mind, that the natural events of extreme symptoms are occuring now compared to 20 years back.
The North eastern region of India (26.3 m ha geographical area) is having an unique geographical and environmental characteristics with very high annual rainfall, no or meagre rain during November to March, soil acidity, P fixation, soil, nutrient and biodiversity loss due to primitive farming practices like along the slope cultivation, shifting cultivation, lack of soil and water conservation measures and so on. The major challenge is sustaining food security and at the same time conserve natural resources. Drought, floods, hailstorms, cyclone, land slide, earthquake etc are major natural disasters in the region which farmers/people face every year. By 2050, about 30% deficiency in food grains is projected. Oilseed and pulses sector deficiency remain very high. Same is the situation in fish, milk, meat, eggs and so on. Only Horticulture sector is able to meet the requirement and provide a reasonable surplus, thus, there is opportunity for processing and value addition to enhance income and employment. Massive infrastructure and investment is needed for meeting seed and planting materials requirement for crop, animal and fishery sector. Mechanization is still one of the lowest in the region and restricted mostly to rice cultivation that too for field preparation, threshing etc. Light weight automated machines are required for field preparation, planting, intercultural operations and so on. There are large number of farm machines available in various parts of the country many of them may be suitable for the region, with only a little modification. Conservation agriculture is the real need of the region with principle not restricted only to three but beyond like agroforestry, integrated farming system, efficient water use, integrated nutrient management and so on. Rain water harvesting and its efficient utilization, acid soil amelioration, and sustaining soil fertility through integrated nutrient management holds key for achieving Sustainable Development Goal in the region. Addressing shifting cultivation through improved management approaches and farmers participation is also the focus at present. Trans boundary pests (insects and diseases)-their survey and surveillance and adequate management is the major thrust for protecting crop and animal. Addressing marketing and socio-economic issues are also important aspect of agricultural development of the region. Look forward suggestions for devising effective agricultural plan for sustainable hill agriculture. Collaboration and partnership in research is welcome to achieve the goal of self sufficiency and resilience in farming.
I have done flood mapping with Sentinel 1 data for 3 districts of India (West Bengal) i.e. North Pargana, South pargana and East Medinipur. North and South Pargana are showing increasing trend in the water inundation area after the cyclone. But East Medinipur is showing decreasing trend in the water inundation area which is quite unlikely, because after the cyclone the water inundation area should be increased. Now my question is that why is the decreasing trend shown in the East Medinipur district after the cyclone. Please help me to understand this.
Dear Friends, I have a data set of a cyclone impacted estuary. This dataset involve bunch of physical-chemical variables and copepod density data of multiple species. I have collected the data immediate after a cyclone so species no expanded from few to 16 in 7 days and I stopped the study. I had collected data from three sites.
I have tested site specific variations that is not significant for physical-chemical parameters and diversity indices. A reviewer recently wrote back to me " I am therefore, left wondering: why did you not consider multivariate analysis to assess the sequential change in copepod species/abunance dynamics following the impact of Cyclone...? An ordination protocol for example could show how either sites or sampling periods".
Doing multivariate is not a problem for me but I refrained from it seeing the community is unstable therefore CCA type analysis may over look many details of changes. I instead have done univariate following GLMS. What is your theoretical or philosophical opinion on this issue.
Dr. Sourav Paul
University of Calcutta
At present all the world is experiencing weather extremes due to the impact of the climate change. Who is responsible for those consequences of extreme weather in all over the world? finally who is ready to face all these effects by Govt./People? Why all the Govts are not focusing on immediate controlling strategies? Not identifying causative factors in the world? How long will take time to clear our world environment? Why all the Govts not strictly controlling in the ground level before effluents entering into the environment? Why effluents are not treating/estimating properly? How it becomes more dangerous to human life and environment in all over the world?
I am working on a project to send data to a database using FPGA over Ethernet connection. I believe the FPGA needs to communicate with SQL Server in order to transfer the data to a database. I am very new this and unfamiliar to the protocol. Any advise would be much appreciated.
I performed experiment using wrf for a particular cyclone. I noted its position (latitude & longitude) for every 6hr using the central pressure. I have the observed tack data, both in excel.
I used Pythagoras formula to calculate the displacement but in degree and not in km.
Any kind of help is appreciated!
Developing states as well as developed states facing a problem of environmental hazards like floods, cyclones, tsunami etc due to the global environmental changes. Mostly affected are the under-developed states due to lack of resources. South Asian states especially Pakistan, India, Bangladesh, Maldives, Bhutan, etc. are facing serious problems of floods. I am seeking literature regarding flood hazards in Pakistan, India, and Bangladesh.
Why did Tamil Nadu (only 50 cyclones) experience the least number of CYCLONE LANDFALLs along the East Coast of Peninsular India in comparison with that of West Bengal (70 cyclones), Andhra Pradesh (80 cyclones) and Odisha (100 cyclones) - in the last 1000 years?
Off the 300 cyclones over a period of 1000 years between 1900 and 2000, only one third were really severe, while the rest (nearly 200 cyclones) got weakened before striking the east coast.
Why is it so?
The same thing is happening now - that is - Cyclone Gaja - is getting weakened - before striking the east coast on 15th Nov (Wind speed not even 100 km/hour - somewhere between 60 and 80 km/hour).
What is the physics behind such weakening of the (cyclone) system?
We generally heard from learners / Teachers / Researchers that to predict Climatic Change or Oceanological/ Meteorological dynamics and their corresponding paths we need to solve a series of Nonlinear partial differential equations. My question is Who has set this partial differential equations? How these equations are formed ? What are the initial and Boundary conditions ? Is it possible to determine the actual initial and boundary conditions of the Physical problem?
I am studying different variables associated with the cyclone and its variability in north Indian ocean,
any help would be appreciated.. Thank you
I am working on incinerator and need to design good mechanical dust collector. But confused about how to find dimensions and design it.
A severe cyclone has recently struck the east coast of India. What is it that make cyclones a frequent phenomena of the Bay of Bengal and at same time quite rare at Arabian sea?
Though May, October, and November displayed the highest cyclones activity in the Bay of Bengal, these months did not contributed locally to a significant amount of the total rainfall. Is my contribution analysis correct?
TCs_monthly_contribution = ( Ki / Li ) *100
Here, i = 1..12
Ki = TCs average rainfall, Li = total non-TCs rainfall
I am working on simulating tropical cyclones in the Indian Ocean by weather research and forecasting model (WRF). Firstly, I tried to study the impact of different microphysics schemes on the forecasting tropical cyclones. The cyclone track was far from the best-observed track as shown in the attached figure. Then, I did WRFDA (3DVAR) simulation for the same case to improve the result. WRFDA model estimated the cyclone track but didn't estimate the minimum sea level pressure as shown in the attached Figure. I think that the problem is in estimating the PSFC. Thus, I would like to ask if anyone has recommendations to improve the results.
Can Al2O4. Al2O3. AL O (OH) and AL (OH)3 be extracted from a powder containing Nepheline. Can this be done without chemicals? Could it be done by cyclone, sieving or heat treatment. I have large amounts so the process must be scalable.
I am working on modelling the tropical cyclones in the Arabian Sea. My model has three domains with different horizontal resolution (30 km. 10 km, and 3.33 km). I aim to estimate the cyclone track and intensity from the second domain and the precipitation from the third domain. I did several experiments by selecting the physics of WRF model based on well tried schemes. I did four experiments with fixing the physics scheme and changing only the micro physics in order to get its impact on the cyclone track and intensity.
I used Rapid Radiative Transfer Model (RRTM) for long wave radiation, Dudhia Scheme for short wave radiation, Noah Land Surface Model Scheme for Land surface, Yonsei University scheme for Surface and boundary layers, and Kain Fritsch Scheme for Cumulus Parameterization. In addition,for the sensitivity analysis of the micro-physics scheme impact on the model, I used Single moment 3- class WSM3 scheme, WSM 6 graupel scheme and Kessler Scheme while fixing the other schemes. However, my model result is not reliable in all this experiments.
I would like to ask if someone have a recommendation to improve my result as most of the previous study could got the cyclone track close to the observed track by using the same physics scheme .
I hereby attach the simulated cyclone track and minimum sea level pressure (MSLP )with the best observed track and the observed MSLP. In addition to the namelist.input for your review.
Thanks in Advance.
I am studying the impact of micro-physics parameterization scheme on tropical cyclone track and intensity. I would like to ask if there is a way to estimate the cyclone track by GIS/QGIS.
I would like to know, if you have any other suggestion.
Normally producer gas is cooled to normal temp and fed to engine fully replacing diesel as fuel. It is done after cleaning and washing then removal of water. As gas is produced at 677 degree celcius, after cleaning through cyclone and ceramic filters it particulate loading is 1.0 mg/Nm3. My gas is available at 600 degrees. Can i directly feed it to utilise its sensible heat and avoid derating of diesel engine ??.
Is there anyone who experienced problem in merging global and local bathymetry dataset?
When extracted depth of GEBCO or ETOPO dataset reach to measured depth, I meet a difference of 2000 m in deep water and at least 100 m in shallow waters. Such differences make surge model results wrong.
How should I face with this issue?
(Measured depth are available in a distance of 10 km from shoreline. For the rest parts, global dataset is utilized. Moreover, the area cannot be considered smaller, since it should cover the cyclone track).
Thanks in advance for your help,
Indicators of measuring effectiveness of warning system.
Medias of disseminating early warning messages.
Reasons for not responding evacuation order.
Local cooperation and coordination among public agencies, NGOs, volunteers, Fire service, Law enforcing agencies etc. during cyclone.
Common vortex identification criteria like lambda -2 and Q-criteria identify vortex by considering a vortex core as a region of local pressure minima. I understand that the reason a vortex core is considered to be a region of local pressure minima is because the pressure gradient is able to provide the required centripetal force for the fluid to rotate. Is it necessary that vortex core have a local pressure minima? If yes, are anticyclones not vortices even though they have a rotating mass of air?
I have calculated potential intensity for a cyclone using Tang and Emanuel (2012) relation.but at the beginning of TC lifetime U_PI^2 is negative due to larger value of s_b (boundary layer entropy) comparing with s_*_SST(saturated value of entropy at SST). I used averaged values over 4*4 degree domain centered by TC eye at each time step. I used also reanalysis data.
I do appreciate if some one help me
I am trying to mesh a cyclon for mine process, it has some parts that I cant make a conformal meshing, mesh is no continuos and there is no compatibility on nodes.
Peril such as earthquake, flood,cyclone damage structures differently. If one computes hazard risk score (on a scale of 1-10) for each of them on a grid of say 0.25 km X 0.25 km. How to combine these scores and compares hazard risk of different geolocation quantitatively/ qualitatively ?
I have a set of data with wind speed (knots) for a particular tropical cyclone. How can I calculate Pressure Drop from these datas?
I am working with industrial cyclones, I want to know how the pressure and the air velocity affect the temperature of the air inside the vortex.
I think that the cyclones often generate a storms in the Black Sea/
Main direction of waves and storms is from the West to East
In your results "Mean wave energy Flux 1979-2009" direction of energy flux is from east to west. May be It is error?
In attach typical storm and vectors os waves.
This is annual wind field for 1996 and it seems good (Van Vledder, G.Ph., and Adem Akpinar, 2015). But it is no correlation with mean wave energy direction (in attach).
May be anybody have pictures for mean wind field 1979-2010 ?
Status of GEO ring. 2008: only 32% of GEO objects are controlled satellites. 2013: 21% fully controlled, 9% only East West maneuvers. Anyone has updated info?
My research is in the field of failure mechanisms of metal components in cyclonic wind events. I am seeking to establish the effect of resonance of steel strucures induced by wind to estimate survivability of a structure.
I am new to NCL scripts. I have build the scripts for the analysis of surface pressure, Winds, Sea Pressure Contour and I am getting this annoying Warning.
"warning:tmXBBorderOn is not a valid resource in plt_Surface24_1_map at this time"
Also I am also not getting the lat long information although I have used the resource for the projection.
I am analyzing the output for 48hr forecasted cyclone Vardha output at 12km Resolution.
Please help me !
I'd like to know how are defined on a surface map the position of fronts (cold and warm) that we find on meteorological surface pressure maps (see link). I want to plot those fronts at a specific time during a cyclone (low pressure), see the attached pdf file upper panel.
Is there a specific criterion to define those front positions?
I'm using ECMWF ERA-20C reanalysis data so I have access to many parameters. I've tried dew point temperature gradient (norm) to find the brutal change in temperature and moisture associated with warm front without great success. Maybe a specific isoline of dew point temperature? I'm using 1 degree gridded data, maybe my resolution is too coarse?
Thanks in advance,
In an industrial fluidized bed reactor, there are usually few differential pressure transducors installed to indicate particle concentrentations of dense bed or freeboard. Could you suggest me a better method to locate the dense bed surface? Accuate determination of the bed surface loaction is critical in design cyclones or diagnosing particle loss problems.
In class, we learned that El Niño is a phenomenon that happens periodically around every 3 to 6 years. However, it was discussed that La Niña, on the hand, does not follow an El Niño every time. Is there a particular condition for a La Niña to trigger? Can it occur without an El Niño event?
It is said to be a successor of TRMM. I want to know about certain advantages and uncertainties of using GPM datasets for tracking monsoons and Cyclones.
How can I get the details about the maximum wind speed radius (R Max) for storm surge modelling. I have download the cyclone tracks and I have generate the cyclone wind generation to storm surge model for that I need the R.max value inputs for Young and Sobey model.
I have learned the algorithms, but not good at programming. I am looking for the cyclone identification and tracing method. Is there anyone could share the code or executive files with me? Thank you very much.
The Safir-Simpson hurricane scale is a classification method to identify the intensity of a tropical cyclone by civil engineer Herbert Saffir and meteorologist Bob (Robert) Simpson, but this method proved to be useless due to its failures to identify the two thirds of the top 156 deadliest hurricanes from 1851 to 1996. I found the overgeneralization problem caused this.
I developed a new classification method to deal with this problem, but many reviewers and editors told me that even though what you said is correct, we still insist on using SSHS, and your paper can't be published at least in the journals of USA due to common people accepting SSHS. I really don't know why this thing could happen in scientific world, any people know the true reason?
I'm using CORDEX south asia wind data for simulation of waves in Indian ocean region. So I would like to know whether cyclone and sea breeze is being considered in this?
So far, I was thinking that in the northern hemisphere the cyclonic rotation is in anti clockwise direction. So, with the same direction its movement also be there. (e.g., most of the Bay of Bengal (east coast) cyclones like.. Neelam, Thane, Nisha)... But in the Arabian sea it is moving towards North east direction (e.g., cyclone Nilofar) ..
Is it because of background wind or any other factors are there for determining the cyclonic movement?
I am willing to know which factor is determining the cyclone movement...
anyone can help me?........
In a fluidised bed gasification, cyclone removes the fly ash/particles leaving with the syngas, What is the best mechanism of ash removal from the bed side in the temperature range of 800-1000 degrees for small scale capacity FBG?
The country would not survive if there is natural disasters like tsunami, cyclone, flood and drought. So what measures or immediate action so be taken to protect lives?
I want to see whether there were any typical impact of low pressure systems occurring in The Bay of Bengal to atmospheric pollutants at Bhubaneswar, Odisha, India. Please suggest how can I derive the past low pressure system images at various dates (During November 2010 to February 2012). Which satellite images can be used and where from can they be downloaded?
Where RH is the relative humidity between 500-700 mb. Humidity is zero if RH<40 and one if RH>70.