Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica.

Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where inorganic nitrogen is vastly transported and deposited through precipitation on terrestrial and aquatic ecosystems. To fill this gap, we present compositions of water stable isotopes in precipitation and atmospheric nitrate (δO-HO, δH-HO, δN-NO, and δO-NO) collected daily between August 2018 and November 2019 in a tropical urban atmosphere of central Costa Rica.

Isotope composition of carbon dioxide and methane in a tropical urban atmosphere.

This work presents a weekly carbon isotope composition analysis (June 2017-January 2018) of carbon dioxide (CO) and methane (CH) in a tropical urban atmosphere (Central Valley, Costa Rica). δC values of CO and CH ranged from -12.2 to -5.