W. Barclay Shoemaker
20170701
GOES Potential and Reference Evapotranspiration in Florida - 1985 to 1995, and 2015
ASCII text format
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/F7PK0F2Z
Potential (PET) and reference (RET) evapotranspiration are computed at 2-kilometer, daily resolution throughout Florida as part of a long-term multi-agency partnership between the U.S. Geological Survey and all 5 Water Managements Districts in Florida. In 2015, a pilot study was initiated to historically extend (1985 to 1995) this database and potentially improve calculations with (1) albedos measured by the Moderate Resolution Imaging Spectroradiometer (MODIS) and (2) forecasts of air temperature, relative humidity and wind speed from climate models such as North American Regional Reanalysis (NARR) simulations. During the pilot study, experiments revealed that radial-basis functions created superior regional distributions of air temperature, relative humidity and wind speed data over Florida, in contrast with inverse-distance interpolation that was plagued with "bulls-eye" effects. Due to sparse historical weather station data, NARR simulation results were used with radial-basis interpolation to historically extend the database from 1985 to 1995, for better characterization of long-term variability in PET and RET. In summary, the pilot study improved some data sources, while revealing previously unknown variability in PET and RET created by the "covered karst" terrain of central Florida, urbanization, and flooding events in regional wetlands such as the subtropical south Florida Everglades.
Potential (PET) and reference (RET) evapotranspiration are required for many community planning activities such as water-use permitting and regulation, estimating agricultural irrigation demands, scientific evaluations of ecosystem resiliency, and modeling surface and groundwater.
19850101
19951231
20150101
20151231
ground condition
Annually
-89.560546875018
-79.189453125432
32.361033737161
24.166402900476
None
Evapotranspiration, Potential Evapotranspiration, Reference Evapotranspiration, Solar radiation, Water Budget
Florida
Florida
none
none
W. Barclay Shoemaker
U.S. Geological Survey
mailing and physical
3321 College Ave
Davie
FL
33314
USA
954 377 5956
bshoemak@usgs.gov
Data_Set_Credit: South Florida Water Management District, South West Florida Water Management District, Saint John's River Water Management District, North Florida Water Management District, Suwannee River Water Management District, U.S. Geological Survey
No formal attribute accuracy tests were conducted
No formal logical accuracy tests were conducted
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
No formal positional accuracy tests were conducted
No formal positional accuracy tests were conducted
Air temperature, relative humidity and wind speed data were assembled into arrays for PET and RET calculations.
20160601
FORTRAN programs were run to compute PET and RET.
20160701
PET and RET results were corrected, archived and posted on the internet.
20170701
None
Point
0.001
0.001
Decimal degrees
Data columns are defined at:
https://fl.water.usgs.gov/et/data/2016/index.html
Data columns include:
Date, in year month day (yyyymmdd)
Latitude of Pixel, in decimal degrees
Longitude of Pixel, in decimal degrees
Pixel ID number
Potential evapotranspiration, in millimeters per day
Reference evapotranspiration, in millimeters per day
Solar radiation, in MegaJoules per square meter per day
Daily maximum relative humidity, in percent
Daily minimum relative humidity, in percent
Daily maximum air temperature, in degrees Celsius
Daily minimum air temperature, in degrees Celsius
Wind speed, in meters per second
Notes concerning the current data sets:
Missing values are represented by the number -9999.900
Data Quality codes, based on the quality of solar radiation data that day, 1 = Good quality, 2 = Usable data, 3 = Uncertain or unverifiable quality, 4 = Unusable or missing.
https://fl.water.usgs.gov/et/
W. Barclay Shoemaker
U.S. Geological Survey
mailing and physical
3321 College Ave
Davie
Florida
33016
USA
954-377-5956
bshoemak@usgs.gov
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations.
20170823
W. Barclay Shoemaker
U.S. Geological Survey
Hydrologist
mailing and physical
3321 College Ave
Davie
FL
33314
USA
954 377 5956
bshoemak@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998