Here we study the interactions between the atmosphere and the living organisms on the planet or biosphere. At USU, research focuses on the connections between various land ecosystems and the atmosphere, including water vapor exchanges over vegetation and evapotranspiration, Co2 exchange annual balances of ecosystems, remote sensing of land sufaces and connections to climate processes.
- Eddy covariance systems to measure turbulence properties and exchanges of momentum, heat, water vapor and CO2 over various surfaces.
- Tethered balloon system for measurements of the atmospheric boundary layer.
- Light sensors to measure photosynthetically active radiation inside and above plant canopies.
- Net radiometers, soil heat flux plates, soil temperature, and soil moisture sensors. These are used to quantify the flow of energy in the soil and available radiation energy.
- Weather stations that measure atmospheric properties such as air temperature and humidity, solar radiation, and wind.
- High Performance Computing (HPC) facility, view here.
Office address at USU: AGSC 360
Phone: (435) 797-2009
Larry's research interests include:
• Interactions between vegetation and atmosphere, including surface fluxes of water, CO2 and energy.
• Wet and dry climate cycles of the Great Basin, and connections to large-scale ocean and atmosphere features.
• Effects of seasonal variations in weather on dendroclimatology reconstructions of climate.
Office address at USU: 4825 Old Main Hill
Phone: (435) 760-8023
Rob's research interests include:
- Land surface processes and remote sensing, integrating the fields to study various aspects of the earth's environments.
- Utah Climate Center Director (Utah Climate Center)
Interactions between vegetation and atmosphere, including surface fluxes of water, CO2 and energy. Wet and dry climate cycles of the Great Basin, and connections to large-scale ocean and atmosphere features. Effects of seasonal variations in weather on dendroclimatology reconstructions of climate.
Impervious surface area analysis in Logan, Utah. Spatial analysis of vector-borne disease outbreaks like West Nile virus. Linked micromaps of chronic wasting disease in mule deer. Plant phenology in the timing of tree budburst within urban environments.
Employing observational data sets for tree ring and other surrogate estimates for precipitation in the Intermountain region to analyze the distinct wet/dry climate cycles. Cooperating in current efforts to use various time statistical and dynamical analyses to quantify the magnitude and frequencies of drought and wet episodes. Identifying large scale atmospheric and oceanic features at appropriate spatial and temporal scales that connect with the cyclical variations in wet and dry periods. Employing a synoptic climatology approach to identify connections between the characteristics of these features with low and high frequency variations in climate. Connect land-atmosphere interactions, mesoscale atmospheric models and regional climate in several ecosystems.
Recent Graduate Theses and Dissertations:
Properties of turbulence-induced light fluctuations and their effects on canopy photosynthesis in alfalfa. Gengsheng Zhang. Ph.D. 2003. Adviser: L.E. Hipps
The transpiration rate of tamarisk riparian vegetation. Kiyoshi Hattori. M.S. 2004. Adviser: L.E. Hipps Response of water vapor and CO2 fluxes in semi-arid plant communities to variations in precipitation. Sasha Ivans. Ph.D. 2005. Adviser: L.E. Hipps
Grazing and burning effects on evapotranspiration in a sagebrush-steppe ecosystem. Sinisha Ivans. Ph.D. 2005. Adviser: L.E. Hipps
Terrain and biome effects on geophysical variables derived from boundary layer models coupled with airborne data. Bekele Temesgen. Ph.D. 2001. Adviser: R.R. Gillies
An examination of scale issues involved with remotely sensed data. Nathaniel A. Brunsell. Ph.D. 2003. Adviser: R.R. Gillies
Investigating ecological indicators of vector-borne disease through the use of enviro-climatic data with a case study of the west nile virus. Peter L. A. Ma. M.S. 2006. Adviser: R.R. Gillies
A comparative simulation of net ecosystem exchange (NEE) CO2 fluxes for two stomatal-resistance formulations over corn and soybean canopies. Joshua L. Campbell. M.S. 2006. Adviser: R.R. Gillies
Evapotranspiration of Kentucky Bluegrass. Lynda Fenton. M.S. 2010 L.E. Hipps
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