Title of dataset Thermal infrared imagery, Wailupe, HIAbstract Coastal groundwater dependent ecosystems take advantage of low salinity, nutrient rich submarine groundwater discharge (SGD). Across the Pacific islands marine macroalgae have been challenged by and adapted to the stress of lowered salinity with a trade-off of nutrient subsidies delivered by SGD. Human alterations of groundwater resources and climate change-driven shifts brought modifications to the magnitude and composition of SGD. This paper discusses how native macroalgae have adapted to SGD nutrient and salinity gradients, but that invasive algae are outcompeting the native ones near SGD with nutrient pollution, due to their higher salinity tolerance. It is important to re-evaluate land and water use practices by modifying groundwater sustainable yields and improving wastewater infrastructure to keep SGD reductions minimal and nitrogen inputs in optimal ranges. This task may be particularly challenging amidst global sea level rise and reductions in groundwater recharge, which threaten coastal groundwater systems and ecosystems dependent on them.Keywords submarine groundwater discharge, thermal infrared imagery, temperatureDataset lead author Eunhee LeePosition of data author Senior ResearcherAddress of data author Korea Institute of Geoscience and Mineral Resources (KIGAM)Email address of data author eunheelee@kigam.re.krPrimary contact person for dataset Henrietta DulaiPosition of primary contact person Professor, principal investigatorAddress of primary contact person 1680 East-West Rd POST 707 Honolulu, HI 96822Email address of primary contact person hdulaiov@hawaii.eduOrganization associated with the data University of Hawaiʻi at MānoaUsage Rights publicly available and free to useGeographic region Wailupe, O’ahu, Hawai’I, USAGeographic coverage 21.2759N, 21.2751N, 157.7624W, 157.7606WTemporal coverage - Begin date April 1, 2015Temporal coverage - End date April 1, 2015General study design Imagery of known groundwater discharge spots was performed at low tide, during a single flight.Methods description The thermal camera (FLIR T450sc) with a field of view (FOV, 258 3198) was mounted on a S1000 Octocopter drone (DJI Inc) using a three-axis direct drive gimbal (DYS Eagle Eye) mounting system. Laboratory, field, or other analytical methods Infrared images were collected, georeferenced based on AUV flight information, a false color SST map was produced and draped over a visible light image from Google Earth. Quality control The following parameters were checked for quality control: UAV battery, transmitter, and GPS, thermal sensor, flight information dataAdditional information