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Abstract International research is necessary in aquatic sciences because water moves across borders. Historically, international collaborations have been useful in conducting oceanographic research programs, which span large distances and require several funding sources. Although valuable, international research can have unforeseen challenges to the unprepared researcher. Communication with an international collaborator and professional development training can mitigate these pitfalls. The Limnology and Oceanography Research Exchange Program (LOREX) is an opportunity for graduate students to gain experience developing international collaborations. The LOREX program aims to help graduate students develop connections and gain experience in international research. During the summer of 2019 and spring of 2020, 26 graduate students from 24 U.S. institutions will travel to one of six different host institutions to conduct a research project that they developed with an international collaborator. To prepare for their research experience, LOREX participants participated in training programs during the 2019 Aquatic Sciences Meeting in San Juan, Puerto Rico. The first group of LOREX graduate students will share their experience through social media and blog posts throughout their journey. Applications are now open for the second cohort of LOREX participants, and potential applicants are encouraged to contact potential collaborators to develop a research project. 

Abstract Terrestrial groundwater travels through subterranean estuaries before reaching the sea. Groundwater‐derived nutrients drive coastal water quality, primary production, and eutrophication. We determined how dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), and dissolved organic nitrogen (DON) are transformed within subterranean estuaries and estimated submarine groundwater discharge (SGD) nutrient loads compiling > 10,000 groundwater samples from 216 sites worldwide. Nutrients exhibited complex, nonconservative behavior in subterranean estuaries. Fresh groundwater DIN and DIP are usually produced, and DON is consumed during transport. Median total SGD (saline and fresh) fluxes globally were 5.4, 2.6, and 0.18 Tmol yr⁻¹for DIN, DON, and DIP, respectively. Despite large natural variability, total SGD fluxes likely exceed global riverine nutrient export. Fresh SGD is a small source of new nutrients, but saline SGD is an important source of mostly recycled nutrients. Nutrients exported via SGD via subterranean estuaries are critical to coastal biogeochemistry and a significant nutrient source to the oceans.