Porcupine Abyssal Plain Observatory Datasets dataset https://portal.medin.org.uk/portal/start.php?tpc=006_e6e4a6bd81825dadb51accf6ec3d3e85 The Porcupine Abyssal Plain (PAP) Observatory is a sustained, multidisciplinary observatory. Key time-series datasets include measurements of sea temperature, air temperature, air pressure, waves, wind, CO2, salinity, Megafauna (Species diversity, abundance and biomass), geochemistry, humidity, chlorophyll, nitrate, PAR and currents. The PAP observatory is situated in the Northeast Atlantic away from the continental slope and mid Atlantic ridge (49N,16.5W, depth 4800m). Since 1989, this environmental study site in the Northeast Atlantic has become a major focus for international and interdisciplinary scientific research and monitoring including water column biogeochemistry, physics and benthic biology. Since 2002, a mooring has been in place with sensors taking a diverse set of biogeochemical and physical measurements of the upper 1000m of the water column. Some of these data are transmitted in near real-time via satellite. A diverse range of Essential Climate variables are measured and sampled at the PAP site from the atmosphere and surface ocean to the seafloor. The instruments used include CTD + Backscatter; ADCP (2 way, re-programmable for water profiling as well as burst sampling), Seismometer (2 way, retrieval of selected time period - 1 Minute - in the past e.g. seismic event), Bottom Pressure Sensor, Sediment trap (2 way, re-programmable for change sampling interval), Boxcores, Mega- and Multicores, Optode, Digital Camera and Stand-alone hydrophone. Seafloor sampling includes trawling, coring, towed camera systems from a research ship and time-lapse photography. Since 2002 many of the upper ocean measurements (0-1000m) have been transmitted in near real-time. There is a growing need for ever more accurate climatic models to predict future climate change and the impact this will have on human settlement, the insurance industry, fisheries, agriculture and nature at large. Long term observations at fixed points in the open oceans are essential to provide high quality and high resolution data to increase our knowledge of how our oceans function, how they are changing and how this may impact on the climate. The observatory is coordinated by the National Oceanography Centre. In 2010, a collaboration between NERC and UK Met Office has led to the first atmospheric measurements at the site. 20180518 20130128