Jenerette, George: University of California, Riverside (Project Lead)
Project Funding:
2012 - 2016
NRA: 2011 NASA: HyspIRI Preparatory Airborne Activities and Associated Science and Applications
Funded by NASA
Abstract:
We propose to use the HyspIRI preparatory airborne data collection over the Los Angeles, CA metropolitan region (Los Angeles) to better identify interacting relationships between climate, land cover, surface energy balance variables including temperature and evaporation, and demographic patterns across the dramatic coastal to desert climate gradient. Key components of this proposal are the (1) extensive in-situ measurements planned in connection with the airborne campaigns, (2) application of data-model assimilation tools to couple diverse measurements with process models, and (3) evaluation of societal correlates with energy balance patterns with direct influence on urban sustainability. Our project will address fundamental science and broad societal challenges associated with the coupling between urban heat islands and rates of evaporation. We will provide detailed understanding of urban surface temperature regulation, interactions of surface temperatures with evapotranspiration, and relationships between these energy balance components and neighborhood socioeconomic condition across the strong climate gradient within this region. We will evaluate the relative importance of land cover, meteorology, irrigation, and adjacent landscape patterns on the regulation of land surface temperature and evaporation across throughout the coastal to desert climate gradient using a combination of HyspIRI preparatory airborne data and in-situ measurements. We will quantify how land surface relationships essential to improving the sustainability of dryland cities, notably surface temperature and ET, interact with socio-economic neighborhood segregation.
In answering the research questions, the project objectives are: (1) Process imagery data to generate LST, emissivity, and land cover patterns at sub-regional and regional scales. (2) Conduct in-situ measurements of and energy balance of net radiation, sensible heat, and latent heat (evaporation) and high resolution surface temperature dynamics. (3) Use data-model assimilation approaches to couple surface temperature, meteorology, and land cover patterns with airborne and in-situ data for parameterization of models to scale surface temperature and evapotranspiration rates from diel to annual scales. (4) Identify spatio-temporal variation in correlates between neighborhood land surface temperature for the 2013-2014 airborne campaigns and conduct scenarios of neighborhood suface temperature and evapotranspiration responses to potential climate, vegetation, and irrigation changes. By meeting these objectives we will answer our research questions, evaluate the contribution of multiple hypothesized sources of urban heat island and evapotranspiration regulation, and extended the biophysical findings to better understand potential societal consequences of current and alternative future conditions. This work will provide a strong case-study of HyspIRI-like data to better understand land surface processes within cities.
The project targets the combined need for VSWIR and TIR data, as we will use the VSWIR data to develop a land cover classification and vegetation indices and TIR to evaluate surface emissivity and temperature. A major justification for TIR data from HyspIRI is for improved understanding of UHI dynamics and our project directly addresses questions directed toward this goal. A second justification is for improved estimates of total evaporation and our project will provide field estimates of ET in conjunction with airborne data collection in the urban ecosystem.
Publications:
Crum, S. M., Liang, L. L., Jenerette, G. D. 2016. Landscape position influences soil respiration variability and sensitivity to physiological drivers in mixed-use lands of Southern California, USA. Journal of Geophysical Research: Biogeosciences. 121(10), 2530-2543. DOI: 10.1002/2016jg003469
Crum, S. M., Shiflett, S. A., Jenerette, G. D. 2017. The influence of vegetation, mesoclimate and meteorology on urban atmospheric microclimates across a coastal to desert climate gradient. Journal of Environmental Management. 200, 295-303. DOI: 10.1016/j.jenvman.2017.05.077
Jenerette, G. D. 2018. Ecological contributions to human health in cities. Landscape Ecology. 33(10), 1655-1668. DOI: 10.1007/s10980-018-0708-y
Shiflett, S. A., Liang, L. L., Crum, S. M., Feyisa, G. L., Wang, J., Jenerette, G. D. 2017. Variation in the urban vegetation, surface temperature, air temperature nexus. Science of The Total Environment. 579, 495-505. DOI: 10.1016/j.scitotenv.2016.11.069
Tayyebi, A., Darrel Jenerette, G. 2016. Increases in the climate change adaption effectiveness and availability of vegetation across a coastal to desert climate gradient in metropolitan Los Angeles, CA, USA. Science of The Total Environment. 548-549, 60-71. DOI: 10.1016/j.scitotenv.2016.01.049
Yan, J., Zhou, W., Jenerette, G. D. 2019. Testing an energy exchange and microclimate cooling hypothesis for the effect of vegetation configuration on urban heat. Agricultural and Forest Meteorology. 279, 107666. DOI: 10.1016/j.agrformet.2019.107666
More details may be found in the following project profile(s):
