TYPHOONTRACK2GRIDPOINT
所属分类:自然语言处理
开发工具:R
文件大小:624KB
下载次数:0
上传日期:2020-11-04 14:27:13
上 传 者:
sh-1993
说明: 该脚本用于转换台风路径数据,包含最大风速和台风中心的信息...
(This script is developed to translate Typhoon track data, with information on maximum wind speed and typhoon center, into wind speed at a grid point location. for the Priority indexing model this will be at the center of municipalities)
文件列表:
LICENSE (7651, 2020-11-04)
data (0, 2020-11-04)
data\MANGHKUT.CSV (1200, 2020-11-04)
data\grid_points_admin3.csv (45587, 2020-11-04)
data\haiyan.csv (1158, 2020-11-04)
data\landseamask_ph1.csv (325927, 2020-11-04)
extra (0, 2020-11-04)
extra\TYPHOONTRACK_for_historical.R (35463, 2020-11-04)
figures (0, 2020-11-04)
figures\exposue2.png (91002, 2020-11-04)
figures\exposure.png (36672, 2020-11-04)
figures\haiyan.JPG (51858, 2020-11-04)
figures\pagasa.png (162470, 2020-11-04)
figures\pagasa2.png (26493, 2020-11-04)
figures\pagasa3.png (36745, 2020-11-04)
figures\track.png (97314, 2020-11-04)
figures\wind.png (97314, 2020-11-04)
typhoontrack2point.R (25448, 2020-11-04)
# Typhoon wind hazard estimation
This tool was developed to prepare input for typhoon damage prediction model. The tool is written in R, it uses WILLOUGHBY et al. methedology to calculate windspeed at any gridpoint location in the Phillipiness area of Responsiblity(PAR), based on a typhoon track data. The script reused some codes from [stormwindmodel R package](https://CRAN.R-project.org/package=stormwindmodel). Stormwindmodel was developed to estimate windspeed at a grid location.
The script is available under the [GPL license](LICENSE)
# Localized windspeed
This script is developed to calculate localized wind speed and exposure duration from a typhoon track data with information
on maximum wind speed and typhoon center. This tool can be used to calculate wind speed at any grid point location in
the Philippines Responsibility Area (PAR). In Addition to maximum wind speed the tool will also calculate duration of
exposure to a wind speed above a certain threshold.
# Typhoon Track data
Typhoon forecast data from National Met agencies come in different format, the following example shows a typhoon warning
bulletin issued by PAGASA for the Philippines responsibility area.
![A forecast information of typhoon HAIYAN issued by PAGASA](figures/pagasa.png)
The relevant information on typhoon is extracted form the text document
![A forecast data extracted from warning issued by PAGASA(the above text document)](figures/pagasa2.png)
The typhoon track data is not sufficient information to estimate the possible impact of typhoon. A wind severity map,
which will show the magnitude of wind at different locations is needed as an input for impact based forecasting models.
For 510 typhoon model we need data at each grid location (municipality centers) and this tool can be used to calculate
wind speed at municipality centers.
In addition to typhoon track data , we need to provide information on grid locations for which we want to extract windspeed
Grid point location is provided in the following format
- gridid,glat,glon
- PH012801000,18.453,120.910
- PH012802000,18.267,120.610
- PH012803000,17.906,120.500
- PH012804000,18.490,120.750
- PH012805000,18.038,120.580
- PH012807000,18.219,120.860
- PH012808000,18.011,120.500
...
where: gridid- municipality pcode, glat is latitude, glon is longitude
with the two inputs, Track data and grid points, the code will produce output similar to the table shown below
![A forecast data at a grid point calculated by typhoontrack2grid](figures/pagasa3.png)
In the table above
Vmax_gust maximum wind speed
Vmax_sust maximum sustaind speed
dist_track minimum distance from typhoon track
dist_track minimum distance from typhoon track
gust_dur total duration of exposure for gust wind
gust_dur total duration of exposure for gust wind above 30mph
gust_dur total duration of exposure for gust wind above 30mph
| duration of exposure for gust wind above 30mph |Distance from typhoon track and wind speed |
| ---------------------------------------------- | -------------------------- |
|
|
|
|
|
|
sust_dur total duration of exposure for sustained wind
# Wind severty mapping
Then we can create a severity map from the calculated gridpoint windspeed data
![Wind severity map of Haiyan](figures/haiyan.JPG)
# Referances
This tool is based on the the work of "Willoughby, HE, RWR Darling, and ME Rahn. 2006. Parametric Representation of the Primary
Hurricane Vortex. Part II: A New Family of Sectionally Continuous Profiles.” Monthly Weather Review 134 (4): 1102–20.
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