Oceanographic and surface meteorological data collected from station Piermont Pier weather/hydro by Hudson River Environmental Conditions Observing System (HRECOS) and assembled by Mid-Atlantic Regional Association Coastal Ocean Observing System (MARACOOS) in the Hudson River from 2008-04-25 to 201

NCEI Accession 0163413 contains oceanographic and surface meteorological data collected at Piermont Pier weather/hydro, a fixed station in the Hudson River. These sensors measure AIR TEMPERATURE, BAROMETRIC PRESSURE, CONDUCTIVITY, DEPTH - OBSERVATION, DEWPOINT, DISSOLVED OXYGEN, INCOMING SOLAR RADIATION, LATITUDE, LONGITUDE, OXYGEN - PERCENT SATURATION, PRECIPITATION AMOUNT, RELATIVE HUMIDITY, SALINITY, WATER TEMPERATURE, WIND DIRECTION, WIND GUST, WIND SPEED, pH and turbidity at frequent intervals in the nearshore coastal ocean. Hudson River Environmental Conditions Observing System (HRECOS) collected the data and provided the data to MARACOOS, which assembles data from Hudson River Environmental Conditions Observing System (HRECOS) and other sub-regional coastal and ocean observing systems of the Mid-Atlantic Coastal United States, submitted the data to NCEI as part of the Integrated Ocean Observing System Data Assembly Centers (IOOS DACs) Data Stewardship Program. The data are made available in netCDF formatted files, which follow the Climate and Forecast metadata convention (CF) and the Attribute Convention for Data Discovery (ACDD). Each month, NCEI adds to the Accession the data collected during the previous month.

The meteorological instrumentation is on the roof of a small maintenance building at the end of Piermont Pier in the village of Piermont, NY (41.043 N, 73.896 W). This station uses a HOBO Weather Station Data Logger with a SolarStream wireless data transceiver, in combination with sensors that report the following parameters every 15 minutes: air temperature, barometric pressure, dew point, radiation (PAR), precipitation, daily precip. accumulation, relative humidity, wind speed, direction & gusts. See the section titled “Sensor Specifications” for more information. All sensors are attached to a satellite tower with the exception of barometric pressure, which is located inside the logger box. The building is at least 3 m from tree growth and the sensors are not shaded. The Piermont Pier sampling station, in Piermont NY (41° 2\' 35.0226\" N, 73° 53\' 45.891\" W), is situated on the end of a mile long pier stretching into the Hudson River. The pier is open to the public and regularly used for recreational purposes. It is located just north of the NERRS Piermont Marsh, a tidal salt marsh dominated by the invasive reed Phragmites australis, where approximately 30 MGD of secondarily treated sewage is discharged from Orangetown and Rockland County. The local tidal range varies between 3 and 5 feet and the river bottom is characterized by thick mud and rocks. A submersible YSI 6600 multi-probe sonde is deployed in a perforated PVC tube encasing mounted to the pier. The installed sensors monitor dissolved oxygen, salinity, turbidity, water temperature, water level and pH. This depth sensor has not been surveyed so we are not able to calculate water elevation; a USGS station, however, is located 10 feet to the north of our sensor and does record water elevation. Because the depth sensor is non-vented to the atmosphere, we adjust depth measurements for barometric pressure using the following equation: Corrected Depth = Depth + ((1013- Barometric Pressure) * .0102). This correction is performed on all data since EST 9/23/2011 00:00:00. These corrections were made retroactively once per quarter until 4/18/2015 12:00 EST, when the correction was implemented as an automated calculation on the real-time data. *Chlorophyll measurements ended 12/12/2011 when it was decided that data from this instrument were not informative.