Publications by authors named "Poornima Nagesh"

Article Synopsis
  • The export and transformation of agrochemicals, particularly S-Metolachlor and its byproducts, threaten water quality and are influenced by climate changes.
  • An integrated modeling framework was used to simulate different climate scenarios (dry, wet, high temperature) in Burgenland, Austria, affecting the degradation and transport of these substances in agricultural land.
  • Results indicate that while a significant amount of S-Metolachlor is degraded under various conditions, extreme weather events can lead to increased retention and concentrations of its transformation products in water systems over time.
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While pesticides are essential to agriculture and food systems to sustain current production levels, they also lead to significant environmental impacts. The use of pesticides is constantly increasing globally, driven mainly by a further intensification of agriculture, despite stricter regulations and higher pesticide effectiveness. To further the understanding of future pesticide use and make informed farm-to-policy decisions, we developed Pesticide Agricultural Shared Socio-economic Pathways (Pest-AgriSSPs) in six steps.

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By 2050, the global population is predicted to reach nine billion, with almost three quarters living in cities. The road to 2050 will be marked by changes in land use, climate, and the management of water and food across the world. These global changes (GCs) will likely affect the emissions, transport, and fate of chemicals, and thus the exposure of the natural environment to chemicals.

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The widespread use of chemicals has led to significant water quality concerns, and their use is still increasing. Hence, there is an urgent need to understand the possible future trends in chemical emissions to water systems. This paper proposes a general framework for developing emission scenarios for chemicals to water using the Shared Socio-economic Pathways (SSPs) based on an emission-factor approach.

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