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Wind swath (footprint) for tropical cyclones

10 February 2015   //   by admin   //   Data, News, Tropical cyclone, Visualization  //  Comments (0)

Climate Wikience is able now to generate wind swath (footprint) for tropical cyclones. Find out more at Tropical cyclones page

Pacific Hurricane Iniki (1992) wind swath:

CFSR wind speed data

17 January 2015   //   by admin   //   Data, News  //  Comments (0)
Climate Forecast System Reanalysis (CFSR) now available at Climate Wikience! The data are imported from NCDC NOAA

The temporal resolution of data is 1 hr while the spatial resolution is T382 Gaussian grid. Climate Wikience delivers regular latitude-longitude global grid with 0.25 deg x 0.25 deg resolution using bicubic interpolation.

CFSR does not direclty deliver wind speed, but eastward (u) and northward (v) wind speed vectors. The wind speed is calculated by Climate Wikience as square_root (u^2 + v^2).

Below is the CFSR wind speed at 10 meters above surface on the 28th of August, 2005. The hurricane Katrina was near its peak strength on that date. The isolines are contoured every 1 m/s (meters per second).
The zoom onto hurricane Katrina

Satellite data on sea wind

16 January 2015   //   by admin   //   Data, News  //  Comments (0)
Blended sea wind data product from several satellites including QuikSCAT, SSMIs, TMI and AMSR-E. The product is gridded and has global coverage with 0.25 deg x 0.25 deg spatial resolution. The temporal resolution is 6 hours The data was imported from NOAA National Climatic Data Center

The product was derived from multiple satellite observations: DMSP SSMI F08, F10, F11, F13,F14 F15; TMI; QuikSCAT; AMSR-E while wind direction was taken from NCEP Reanalysis-2 (that is why the product is called “blended”).

Below is eastward wind speed for 10 meters above sea surface (u10m) on the 28th of August, 2005.
Please, visit the Earth remote sensing data page for details.

Isolines for satellite data

16 January 2015   //   by admin   //   Data, News  //  Comments (0)
Now Climate Wikience displays isolines for satellite data. Until now, Climate Wikience was able to display isolines only for data without missing values like climate reanalysis. However, satellite measurements often have areas without data due to clouds or other reasons. Improved algorithm of Climate Wikience now draws isolines for data with missing values.

Below are examples of visualizing isolines for satellite data.
Click an image for its bigger version.

Eastward wind speed for 10 meters above sea surface (u10m) on the 28th of August, 2005. Blended data product from several satellites including QuikSCAT, SSMIs, TMI and AMSR-E.

NASA MERRA Leaf Are Index (LAI) on the 28th of August, 2010.
Zoom at North America, Eurasia, and South America.
MERRA_LAI_LeafAreIndex_28Aug2010_ZoomNorthAmerica MERRA_LAI_LeafAreIndex_28Aug2010_ZoomEuropeAsia

You can label any isoline at its arbitrary point. Simply enable “Click for value” option at the “Properties tab”. A label with isoline value will appear at the point where you clicked on the isoline. Click on the isoline again to hide the label.
Zoom over South America with several labeled isolines and increased width of isolines (compare “Properties tab” of this image and the one below).
The same area without isolines labelling.

Aura OMI Nitrogen Dioxide (NO2) tropospheric concentration on the 1st of October, 2004.
Zoom over Los Angeles.

Terra MODIS Aerosol Optical Thickess (AOT) on the 1st of August, 2005.
Zoom over Africa

Terra MODIS Cloud Top Temperature on the 25th of August, 2005.
The 25th of August (2005) is the date for peak strength of hurricane Katrina.
The same areas without tropical cyclone tracks and without surface.
Modis_CLOUDTopTemperature_28Aug2005_withsurface   Modis_CLOUDTopTemperature_28Aug2005

Climate Wikience is able to interactively visualize tropical cyclones. Find out more at Tropical cyclones page.

NASA MERRA Greeness Vegetation Fraction on the 28th of August, 2010.
Zoom over North America and South America.


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