Browsing by Subject "Climate Change"

Now showing 1 - 4 of 4
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    Examining Ecosystem Drought Responses Using Remote Sensing and Flux Tower Observations
    (2022-09) Jiao, Wenzhe; Wang, Lixin; Novick, Kimberly A.; Filippelli, Gabriel; Wang, Honglang; Li, Lin
    Water is fundamental for plant growth, and vegetation response to water availability influences water, carbon, and energy exchanges between land and atmosphere. Vegetation plays the most active role in water and carbon cycle of various ecosystems. Therefore, comprehensive evaluation of drought impact on vegetation productivity will play a critical role for better understanding the global water cycle under future climate conditions. In-situ meteorological measurements and the eddy covariance flux tower network, which provide meteorological data, and estimates of ecosystem productivity and respiration are remarkable tools to assess the impacts of drought on ecosystem carbon and water cycles. In regions with limited in-situ observations, remote sensing can be a very useful tool to monitor ecosystem drought status since it provides continuous observations of relevant variables linked to ecosystem function and the hydrologic cycle. However, the detailed understanding of ecosystem responses to drought is still lacking and it is challenging to quantify the impacts of drought on ecosystem carbon balance and several factors hinder our explicit understanding of the complex drought impacts. This dissertation addressed drought monitoring, ecosystem drought responses, trends of vegetation water constraint based on in-situ metrological observations, flux tower and multi-sensor remote sensing observations. This dissertation first developed a new integrated drought index applicable across diverse climate regions based on in-situ meteorological observations and multi-sensor remote sensing data, and another integrated drought index applicable across diverse climate regions only based on multi-sensor remote sensing data. The dissertation also evaluated the applicability of new satellite dataset (e.g., solar induced fluorescence, SIF) for responding to meteorological drought. Results show that satellite SIF data could have the potential to reflect meteorological drought, but the application should be limited to dry regions. The work in this dissertation also accessed changes in water constraint on global vegetation productivity, and quantified different drought dimensions on ecosystem productivity and respiration. Results indicate that a significant increase in vegetation water constraint over the last 30 years. The results highlighted the need for a more explicit consideration of the influence of water constraints on regional and global vegetation under a warming climate.
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    Hoosiers’ Health in a Changing Climate: A Report from the Indiana Climate Change Impacts Assessment
    (Purdue University, 2018-01-01) Filippelli, Gabriel; Widhalm, Melissa; Filley, Rose; Comer, Karen; Ejeta, Gebisa; Field, William; Freeman, Jennifer; Gibson, Joe; Jay, Stephen; Johnson, Daniel P.; Moreno-Madriñán, Max; Mattes, Richard; Ogashawara, Igor; Prather, Jeremy; Rosenthal, Frank; Smirat, Jeries; Wang, Yi; Wells, Ellen; Dukes, Jeffrey
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    IU Law Students Clamor for an International Human Rights Clinic
    (2008-12-10) Caparas, Perfecto "Boyet"
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    Something Big that Matters: The American Society of Tropical Medicine and Hygiene’s Commitment to Combat Climate Change
    (American Society of Tropical Medicine and Hygiene, 2020-10-09) John, Chandy C.; Pediatrics, School of Medicine
    Climate change is the most pressing global health issue of our time. Climate change has had and will have profound effects on human health, including the health issues most important to the members of the American Society of Tropical Medicine and Hygiene (ASTMH). As the leading global health society, the ASTMH is dedicated to combating climate change and improving planetary health. Attention to climate change is part of the ASTMH 2019–2022 strategic plan, and climate change and planetary health will be key components of future strategic plans. But, what about ASTMH’s contribution to climate change? In my presidential address in 2019, I focused on the importance of doing “something small that matters”: how the small everyday things we do can make a difference in global health. Working to combat climate change is a complementary task: “something big that matters.” Doing our society business and conducting our Annual Meeting in a year of no travel will teach us a lot. The ASTMH must build on those lessons to make concrete decisions that will reduce our carbon, waste, and water footprints. The coming years offer a unique opportunity to establish the ASTMH as a leader in improving the health of not only those people we serve but also the source that sustains us all, our planet.