Dr. Gordon M. Heisler Profile

Dr. Gordon M. Heisler

Meteorologist at USDA Forest Service

SPIE Involvement:

Author

Proceedings Article | 10 September 2005 Paper

Health impacts of ultraviolet radiation in urban ecosystems: a review

Gordon Heisler

Proceedings Volume 5886, 58860M (2005) https://doi.org/10.1117/12.620941

KEYWORDS: Ultraviolet radiation, Ozone, Cancer, Sun, Melanoma, Skin cancer, Skin, Reflectivity, Radiation effects, Ecosystems

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Proceedings Article | 14 October 2004 Paper

Impact of cloud cover on erythemal UV-B exposure under vegetation canopies

Richard Grant, Gordon Heisler, Wei Gao

Proceedings Volume 5545, (2004) https://doi.org/10.1117/12.562501

KEYWORDS: Clouds, 3D modeling, Ultraviolet radiation, Vegetation, Atmospheric modeling, Ozone, Solar radiation models, Spherical lenses, Skin cancer, Buildings

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Proceedings Article | 4 November 2003 Paper

Inclusion of an ultraviolet radiation transfer component in an urban forest effects model for predicting tree influences on potential below-canopy exposure to UVB radiation

David Nowak, Jeffrey Walton, Wei Gao, Richard Grant, Daniel Crane, Gordon Heisler

Proceedings Volume 5156, (2003) https://doi.org/10.1117/12.509193

KEYWORDS: Ultraviolet radiation, 3D modeling, Buildings, Solar radiation models, Data modeling, Climatology, Vegetation, Meteorology, Geographic information systems, Cancer

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Evaluating the impact of ultraviolet-B radiation (UVB) on urban populations would be enhanced by improved predictions of the UVB radiation at the level of human activity. This paper reports the status of plans for incorporating a UVB prediction module into an existing Urban Forest Effects (UFORE) model. UFORE currently has modules to quantify urban forest structure, urban tree volatile organic compound emissions, carbon storage and sequestration in urban vegetation, dry deposition of air pollutants on trees, tree influences on energy use for heating and cooling buildings, tree pollen allergenicity index, and replacement cost of trees. These modeled effects are based upon field sampling to characterize land use, vegetation cover, and building features. The field sampling includes recording of tree species, total height, height to base of live crown, and crown width on randomly selected 0.04-ha (0.1 acre) plots. Distance and direction from sampled trees to buildings are also measured. The input for UFORE modeling of effects includes hourly meteorological data and pollution-concentration data. UFORE has already been used in assessing the urban forest functionof 13 cities in the United States and 5 cities in other countries. The objective of the present work is to enable UFORE to predict the effect of different urban tree densities on potential average human exposure to UVB. The current version of UFORE is written using the Statistical Analysis System (SAS); a new version will be a user-friendly Windows application and will be available for wide distribution. Progress to date on the UVB module consists primarily of examining available modeling and data collection tools. Two methods are proposed for the UVB module. In Method 1, we will derive predicted UVB irradiance <I_b> at person height, that is, below the urban tree and building canopy, using gap fractions (sky view portions) measured from digitized fisheye photos taken from each of the UFORE plot centers during a UFORE field survey. A promising method for analyzing the photos is the use of Gap Light Analyzer (GLA). A human thermal comfort model will be used to determine the times when people would be comfortable outdoors in light attire, and UVB <I_b> will be determined for those times. Method 2 will be applied in cases where hemispherical photos cannot be made available, and for making predictions for cities where surveys have already been done. Method 2 will use a 3D canopy UV radiation transfer model to derive <I_b> based on tree canopy cover maps from GIS analysis of aerial color IR photographs or Landsat TM images. The UV module addition to UFORE will make it useful in epidemiology of UV-related human disease and assessment of UV benefits, such as in vitamin D production, and it will also facilitate consideration of UV exposure in urban forest management.

Proceedings Article | 4 November 2003 Paper

Penetration of UV-A, UV-B, blue, and red light into leaf tissues of pecan measured by a fiber optic microprobe system

Shuju Bai, Thomas Vogelmann, Yadong Qi, Gordon Heisler

Proceedings Volume 5156, (2003) https://doi.org/10.1117/12.506629

KEYWORDS: Tissues, Fiber optics, Natural surfaces, Signal attenuation, Fiber optics tests, Ultraviolet radiation, Optical testing, Visible radiation, Reflectivity, Light scattering

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Proceedings Article | 1 July 2003 Paper

Impact of enhanced ultraviolet-B irradiance on maize yield and its seed qualities: a field evaluation

Wei Gao, James Slusser, Jianqiang Xu, Youfei Zheng, Douliang He, Gordon Heisler

Proceedings Volume 4896, (2003) https://doi.org/10.1117/12.466201

KEYWORDS: Radiation effects, Lamps, Ultraviolet radiation, Proteins, Ozone, Photosynthesis, Ear, Meteorology, Ecosystems, Ecology

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Proceedings Article | 1 July 2003 Paper

Solar ultraviolet-B radiation in urban environments: Baltimore, Maryland

Corinne Ehrlich, Wei Gao, James Slusser, Richard Grant, Gordon Heisler

Proceedings Volume 4896, (2003) https://doi.org/10.1117/12.466229

KEYWORDS: Ozone, Calibration, Solar radiation, Ecosystems, Ultraviolet radiation, Aerosols, Sensors, Agriculture, Pollution, Environmental monitoring

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Proceedings Article | 1 July 2003 Paper

Intra- and inter-specific comparisons of leaf UV-B absorbing-compound concentration of southern broadleaf trees in the United States

Shuju Bai, Yadong Qi, Gordon Heisler, Wei Gao

Proceedings Volume 4896, (2003) https://doi.org/10.1117/12.466231

KEYWORDS: Absorbance, Light emitting diodes, Tissues, Ultraviolet radiation, Tolerancing, Analytical research, Forestry, Ecology, Transmittance, Spectrophotometry

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Proceedings Article | 17 January 2002 Paper

Methodology for comprehensive evaluation of UV-B tolerance in trees

Shuju Bai, Jianhua Qin, Yadong Qi, Thomas Vogelmann, Gordon Heisler

Proceedings Volume 4482, (2002) https://doi.org/10.1117/12.452940

KEYWORDS: Transmittance, Reflectivity, Absorbance, Ultraviolet radiation, Natural surfaces, Tolerancing, Visible radiation, Tissues, Ozone, Radiation effects

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Proceedings Article | 17 January 2002 Paper

Urban tree influences on ultraviolet irradiance

Richard Grant, Wei Gao, Gordon Heisler

Proceedings Volume 4482, (2002) https://doi.org/10.1117/12.452929

KEYWORDS: Sensors, Ultraviolet radiation, Sun, 3D modeling, Buildings, Reflectivity, Visible radiation, Ozone, Atmospheric modeling, Environmental sensing

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Proceedings Article | 17 January 2002 Paper

Impact of enhanced ultraviolet-B irradiance on cotton yield and qualities

Gordon Heisler, Wei Gao, Youfei Zheng, James Slusser

Proceedings Volume 4482, (2002) https://doi.org/10.1117/12.452941

KEYWORDS: Lamps, Agriculture, Ultraviolet radiation, Ozone, Environmental monitoring, Meteorology, Magnesium, Atmospheric monitoring, Atmospheric sciences, Climate change

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