An Examination of Environmental Conditions Related to Localized Arboviral Transmission in Florida (Three Case Studies)
Presented at the Florida Mosquito Control Association Regional Short Course: Public Health Pest Control Training: Mosquito-borne Disease, GIS, and reports on selected mosquito species in Florida
peninsular Florida is the main driving factor that forces birds and mosquitoes together into focal amplification communities. Summer wetting is the main driving factor that allows for transmission outside of focal amplification areas. Naïve Bird Populations Mosquito Breeding Habitats Driving Environmental Factor
NWS operations at 12 River Forecast Centers and derives from a multisensor approach. Inputs include WSR-88D NEXRAD radar and ground rainfall gauge reports. Spatial resolution of 4 km2 and a temporal resolution of 60 minutes. Data is produced hourly by National Weather service across all of the continental United States. Data is available as a free download in either daily or hourly packages in different formats.
actual amounts of rainfall in specific locations…choose their locations with a purpose. Doppler rainfall totals are extremely precise and may be better for picking up trace amounts than Rain Gauges. Rain Gauges may over-estimate regional rainfall amounts. Doppler is better suited for broad, regional rainfall estimations. NWS Precipitation Analysis - NEXRAD
the dryness of the soil and duff layers. The scale ranges from 0 (no moisture deficit) to 800 (extreme moisture deficit). Inputs include temperature and rainfall. KBDI originally developed by John Keetch and George Byram for the USDA. 8,870 KBDI data points across Florida Data is produced daily by Florida Division of Forestry across all of the state and much of the southeast. Spatial resolution of 4 km2 and a temporal resolution of 24 hours.
temperature, soil and vegetation types, and evapotranspiration distributed by NOAA through its Global Energy and Water Cycle Experiment Project. Spatial resolution of 0.125° (~11 km2) and a temporal resolution of 24 hours. Model developed by Jeffery Shaman (Oregon State University) and Jonathan Day (University of Florida). Modeled Water Table Depth – MWTD 589 MWTD data points across peninsular Florida MWTD only available for southern peninsular Florida due to the required topography restraints of the model. Funding needed to develop a northern Florida model.
MAY JUN JUL AUG SEP OCT NOV DEC IDD SWET SLE/WNV Arboviral Transmission Timeline IWET SDD Spatiotemporal Driving Forces Environmental Amplification Non-Epidemic Transmission Avian Reproduction Mosquito Egg Production Sentinel Transmission Human Transmission
100 Jan Jan Jan Jan Feb Feb Mar Mar Mar Apr Apr Apr May May May May June June June July July July Aug Aug Aug Sept Sept Sept Oct Oct Oct Nov Nov Nov Dec Dec Dec Temperature (F°) Daily Max Temp vs. Daily Max Average January through December, 2009 40 50 60 70 80 90 100 Jan Jan Jan Jan Feb Feb Mar Mar Mar Apr Apr Apr May May May May June June June July July July Aug Aug Aug Sept Sept Sept Oct Oct Oct Nov Nov Nov Dec Dec Dec Temperature (F°) Daily Max Temp vs. Daily Max Average January through December, 2010 30 40 50 60 70 80 90 100 110 Jan Jan Jan Jan Feb Feb Mar Mar Mar Apr Apr Apr May May May May June June June July July July Aug Aug Aug Sept Sept Sept Oct Oct Oct Nov Nov Nov Dec Dec Dec Temperature (F°) Daily Max Temp vs. Daily Max Average January through December, 2011
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Inches Monthly Rainfall Deviation January through December, 2009 -4.00 -3.00 -2.00 -1.00 0.00 1.00 2.00 3.00 4.00 Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Inches Monthly Rainfall Deviation January through December, 2010 -5.00 -4.00 -3.00 -2.00 -1.00 0.00 1.00 2.00 3.00 4.00 5.00 Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Inches Monthly Rainfall Deviation January through December, 2011