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1. The European Russia Drought Atlas (1400–2016 CE)

   https://doi.org/10.1007/s00382-019-05115-2  

   Cook, Edward R.; Solomina, Olga; Matskovsky, Vladimir; Cook, Benjamin I.; Agafonov, Leonid; Berdnikova, Alina; Dolgova, Ekaterina; Karpukhin, Aleksey; Knysh, Natallia; Kulakova, Marina; et al (February 2020, Climate Dynamics)
2. Partitioning of NH3-NH4+ in the Southeastern U.S.

   https://doi.org/10.3390/atmos12121681  

   Cheng, Bin; Wang-Li, Lingjuan; Meskhidze, Nicholas; Classen, John; Bloomfield, Peter (December 2021, Atmosphere)

   The formation of inorganic fine particulate matter (i.e., iPM2.5) is controlled by the thermodynamic equilibrium partitioning of NH3-NH4+. To develop effective control strategies of PM2.5, we aim to understand the impacts of changes in different precursor gases on iPM2.5 concentrations and partitioning of NH3-NH4+. To understand partitioning of NH3-NH4+ in the southeastern U.S., responses of iPM2.5 to precursor gases in four seasons were investigated using field measurements of iPM2.5, precursor gases, and meteorological conditions. The ISORROPIA II model was used to examine the effects of changes in total ammonia (gas + aerosol), total sulfuric acid (aerosol), and total nitric acid (gas + aerosol) on iPM2.5 concentrations and partitioning of NH3-NH4+. The results indicate that reduction in total H2SO4 is more effective than reduction in total HNO3 and total NH3 to reduce iPM2.5 especially under NH3-rich condition. The reduction in total H2SO4 may change partitioning of NH3-NH4+ towards gas-phase and may also lead to an increase in NO3− under NH3-rich conditions, which does not necessarily lead to full neutralization of acidic gases (pH < 7). Thus, future reduction in iPM2.5 may necessitate the coordinated reduction in both H2SO4 and HNO3 in the southeastern U.S. It is also found that the response of iPM2.5 to the change in total H2SO4 is more sensitive in summer than winter due to the dominance of SO42− salts in iPM2.5 and the high temperature in summer. The NH3 emissions from Animal Feeding Operations (AFOs) at an agricultural rural site (YRK) had great impacts on partitioning of NH3-NH4+. The Multiple Linear Regression (MLR) model revealed a strong positive correlation between cation-NH4+ and anions-SO42− and NO3−. This research provides an insight into iPM2.5 formation mechanism for the advancement of PM2.5 control and regulation in the southeastern U.S. 

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3. The Early Evening Transition in Southeastern U.S. Tornado Environments

   https://doi.org/10.1175/WAF-D-20-0191.1  

   Brown, Matthew C.; Nowotarski, Christopher J.; Dean, Andrew R.; Smith, Bryan T.; Thompson, Richard L.; Peters, John M. (August 2021, Weather and Forecasting)

   Abstract The response of severe local storms to environmental evolution across the early evening transition (EET) remains a forecasting challenge, particularly within the context of the Southeast U.S. storm climatology, which includes the increased presence of low-CAPE environments and tornadic nonsupercell modes. To disentangle these complex environmental interactions, Southeast severe convective reports spanning 2003–18 are temporally binned relative to local sunset. Sounding-derived data corresponding to each report are used to characterize how the near-storm environment evolves across the EET, and whether these changes influence the mode, frequency, and tornadic likelihood of their associated storms. High-shear, high-CAPE (HSHC) environments are contrasted with high-shear, low-CAPE (HSLC) environments to highlight physical processes governing storm maintenance and tornadogenesis in the absence of large instability. Last, statistical analysis is performed to determine which aspects of the near-storm environment most effectively discriminate between tornadic (or significantly tornadic) and nontornadic storms toward constructing new sounding-derived forecast guidance parameters for multiple modal and environmental combinations. Results indicate that HSLC environments evolve differently than HSHC environments, particularly for nonsupercell (e.g., quasi-linear convective system) modes. These low-CAPE environments sustain higher values of low-level shear and storm-relative helicity (SRH) and destabilize postsunset—potentially compensating for minimal buoyancy. Furthermore, the existence of HSLC storm environments presunset increases the likelihood of nonsupercellular tornadoes postsunset. Existing forecast guidance metrics such as the significant tornado parameter (STP) remain the most skillful predictors of HSHC tornadoes. However, HSLC tornado prediction can be improved by considering variables like precipitable water, downdraft CAPE, and effective inflow base. 

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4. Exacerbation of the 2013–2016 Pan‐Caribbean Drought by Anthropogenic Warming

   https://doi.org/10.1029/2018GL079408  

   Herrera, Dimitris A.; Ault, Toby R.; Fasullo, John T.; Coats, Sloan J.; Carrillo, Carlos M.; Cook, Benjamin I.; Williams, A. Park (October 2018, Geophysical Research Letters)
5. “Why Change?” Monopoly and Competition in the Southeastern U.S. Electricity System

   https://doi.org/10.1080/24694452.2023.2185198  

   Harrison, Conor; Welton, Shelley (July 2023, Annals of the American Association of Geographers)