Wide World of SPoRT Blog
LIS Soil Temperature Observations as More Wintry Precip Moves into the TN Valley
Fri, 20 Feb 2015
Chances for wintry precipitation continue in the Tennessee Valley. This morning and afternoon, another batch of precipitation was moving across areas of the lower to mid Mississippi Valley. Ground reports indicate that much of the precipitation reaching the surface is a mix of snow and sleet in eastern Arkansas and northern Mississippi. Drier air in the lower levels may prevent some of the precipitation from reaching the surface on the northern extent of the precipitation shield. [...]
New AIRS Ozone Anomaly Product for Identifying Stratospheric Air
SPoRT has been using the Atmospheric Infrared Sounder (AIRS) Total Column Ozone product to diagnose the presence of high-potential vorticity, warm, dry, ozone-rich stratospheric air in RGB Air Mass imagery. The presence of stratospheric air is important for identifying regions susceptible to stratospheric intrusions and tropopause folds. Stratospheric intrusions and tropopause folds aid cyclogenesis, produce strong low-level non-convective winds, and also promote or suppress convection by changing the stability of the atmosphere via downward transport of warm, dry, high potential vorticity air. SPoRT has developed an AIRS Ozone Anomaly product to assign significance to the high ozone values seen in the Total Column Ozone product.
Image of the Day
(click to enlarge)
An example of the MODIS Air Mass red-green-blue (RGB) composite product developed using guidelines from EUMETSAT. By using multiple spectral bands, certain air mass characteristics can be delineated that would otherwise go undetected in single channel imagery. Here, the colorful RGB composite identifies warm and cool air masses contrasting on opposite sides of two frontal boundaries associated with midlatitude cyclones traversing the northeastern United States. Physically, the red channel identifies moisture at the mid and upper levels, green identifies ozone rich (polar) and ozone poor (subtropical) regions, while blue depicts upper level moisture.
Ingest and Product Status Pages
Though we're not 24/7, SPoRT strives to provide the most timely and reliable data products to its partners and end users. A system has been developed to monitor the health of our real-time data ingest and availability of LDM and FTP products. Summaries are posted every 10 minutes to the links below.