|Degree-Days for IPM
Description: Results of MGDD model
for corn planted at 10-day intervals at Richmond (Chimborazo), VA.
The developmental stage of corn can be estimated from the
accumulated MGDDs (y-axis). Here, temperatures are in celsius, so
corn would reach silking (R1) stage at approximately 500 MGDDs. another
|The graph shown above is for Chimborazo,
Virginia, the site of many Civil War battles that led to the
capture of the confederate capital of Richmond, VA. This should not
be confused with Chimborazo,
Ecuador, the most distant place from the center of the Earth
when standing on the surface of the planet.
|The GIS-based degree-day calculator is a tool for calculating the
accumulating heat units using various methods. The DD calculator
interface allows for user-specified parameters (biofix, base
temperature, cutoff, cutoff method, interpolation method). The
calculator developed using Visual Basic and ESRI ArcObjects.
The spatiotemporal output illustrates how degree-days might
accumulate for a population of english grain aphids. There are a
number of limitations to this model.
shadows using NED and solar position
- Weather visualization using
- Data processing
(Reed Nessler's 2003 Project Results)
- Virginia climate - ArcIMS site
(under construction) Derived from PRISM
- Virginia STATSGO
- Interpolation of
daily temperature surfaces from on-line weather data (Sforza)
- Degree-Day Mapping
for IPM (Sforza) March 24, 2003
Weather Data and Degree-Days. Oregon Sate University
- Klopfer, Scott. 1997. Insolation, Precipitation, and Moisture Maps for a Virginia Geographic Information System.
- NCDC Climate
Data On-Line. http://cdo.ncdc.noaa.gov/plclimprod/plsql/poemain.poe
- Sharov, A. Quantitative Population
Ecology. Dept. of Entomology, Virginia Tech,
State Climatology Office
Degree Days and Phenology Models
- Oregon State Spatial Climate Analysis Center. PRISM
- NOAA Climate
Prediction Center. http://www.cpc.ncep.noaa.gov/
- a diverse community of education and research institutions vested in
the common goal of sharing data, tools to access the data, software
tools to use and visualize the data, and resources.
Regional Earth Science Applications Center (RESAC)
- Phenology links at http://www.dow.wau.nl/msa/epn/phenologylinks.htm
for Climatic Research - U. of Delaware