Parameter: julian_day

Short Description: Julian day as a decimal (time elapsed in days from 00:00 on January 1st 4713 BC)
Short Name: julian_day
Official Name: julian_day
External Identifiers:
skos:exactMatch: http://vocab.nerc.ac.uk/collection/P01/current/CJDY1101/
skos:exactMatch: http://vocab.nerc.ac.uk/collection/P09/current/CJDY/

Description

Julian day as a decimal. Julian date which is the time elapsed in days from 00:00 on January 1st 4713 BC. Julian Date (chronological).

For reference: Julian day 2440000 begins at 0000 hours, May 23, 1968.

Please note, Seabird processing software includes a "julianday" which is day of year.  That is categorized as a separate term "yrday" at BCO-DMO.
Seabird permalink: https://blog.seabird.com/ufaqs/in-sea-bird-software-is-noon-on-january-1-julian-day-0-5-or-julian-day-1-5/


DatasetPI-Supplied DescriptionPI-Supplied Name
1-dimensional data assimilative modeling results for Station ALOHA (22.75 N, 158.0 W) from 1991-2005 (C-MORE project)time time2
4Hz data from 12 Wire Flyer deployments conducted on R/V Sikuliaq cruise SKQ201701S in the Eastern Tropical North Pacific from January to February 2017Julian day Julian_day
4Hz data from 8 Wire Flyer deployments conducted on R/V Atlantis cruise AT42-03 in the Costa Rica Margin from October to November 2018Julian day Julian_day
Moored ADCP data from the Fixed Station cruises of the TRANSPORT program collected from the R/V Hugh R. Sharp cruises in the Choptank River, Chesapeake Bay during 2011-2012 (TRANSPORT project)Numeric time in Julian day for year in UTC time base julian_day
ADCP current depth profiles from R/V Atlantic Explorer cruise AE2207 to the Bermuda Atlantic Time Series (BATS) station in April 2022Observation time in Julian days time
ADCP surface current velocities and directions from R/V Atlantic Explorer cruise AE2207 to the Bermuda Atlantic Time Series (BATS) station in April 2022Julian day from reading Julian_day
Surface pCO2, bottle-corrected Chl a, and shipboard wind speed from cruises conducted during 2010, 2011, and 2012 off the Northeast coast of Brazil in the Amazon River Plume as part of the ANACONDAS projectOrdinal date & time (within a year) Time
Surface meteorological data from Kirkwood Island off the Antarctic Peninsula from the Autonomous Weather station from 2001-2003 (SOGLOBEC project) Julian day (decimal day) as a reference, Julian day 2440000 begins at 0000 hours, May 23, 1968. julian_day
Surface meteorological data from Dismal Island off the Antarctic Peninsula from the Autonomous Weather station from 2001-2003 (SOGLOBEC project) Julian day (decimal day) as a reference, Julian day 2440000 begins at 0000 hours, May 23, 1968. julian_day
Benthic dissolved oxygen and nutrient fluxes from sediment core incubations conducted aboard the R/V Oceanus and R/V Robert G. Sproul during nine cruises from 2018-2022 from the Oregon and Washington shelfJulian day of the year Julian_day
Biogeochemical and biological data from Niskin bottle samples from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, Bermuda Atlantic Time-Series Station from 2011-2012 (Trophic BATS project)Julian day. julian_day
Data from custom instrument (CLASS) measured on R/V Endeavor cruise (EN614) in May 2018Julian Days TimeJ
Mooring meteorological data from the Georges Crest mooring on Georges Bank from Oct. 1994 - Jan. 1995Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
Mooring temperature, salinity, fluor data from the Georges Crest mooring on Georges Bank from Oct. 1994 - Jan. 1995Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
Mooring bio-optical data from the Georges Crest mooring on Georges Bank from Apr - Sept. 1995Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
Mooring meteorological data from the Georges Crest mooring Crest on Georges Bank from Apr - Sept. 1995Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
Mooring temperature, salinity, fluor data from the Georges Crest mooring on Georges Bank from Apr - Sept. 1995 (GB project)Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
Mooring data from the Crest mooring on Georges Bank from 1994-1995 as part of the U.S. GLOBEC Georges Bank project (GB project)Julian day. In this convention, Julian day 2440000 begins at 0000 hours, May 23, 1968 julian_day
CTD hydrographic and nutrients data from R/V Endeavor cruise EN496 in July 2011 in the Gulf of Mexico (GoMX - N2 Fixation project)Julian Time TimeJ
CTD hydrographic and nutrients data from R/V Endeavor cruise EN496 in July 2011 in the Gulf of Mexico (GoMX - N2 Fixation project)Julian Time SDev TimeJ_SD
CTD hydrographic and nutrient data from R/V Endeavor cruise EN509 in May-June 2012 in the Gulf of Mexico (GoMX - N2 Fixation project)Julian Time TimeJ
CTD hydrographic and nutrient data from R/V Endeavor cruise EN509 in May-June 2012 in the Gulf of Mexico (GoMX - N2 Fixation project)Julian Time SDev TimeJ_SD
CTD profile data from R/V Endeavor cruise EN509 in May-June 2012 in the Gulf of Mexico (GoMX - N2 Fixation project)Julian Time of Day TimeJ
CTD data from the Fixed Station cruises of the TRANSPORT program on the R/V Hugh R. Sharp (HRS110714EN, HRS120711EN) in the Choptank River, Chesapeake Bay during 2011-2012 (TRANSPORT project)Numeric time in Julian day for year in UTC time base julian_day
CTD files (netcdf format originally) from NOAA/PMEL FOCI cruises from multiple cruises in coastal Gulf of Alaska, Northeast Pacific, CGOA, SE Bering Sea from 2001-2004 (NEP project)Days since an arbitrary beginning. Used by PMEL's netCDF format. julian_day
CTD data from the Puerto Rico Trench collected with the Deep Autonomous Profiler (DAP) on R/V Endeavor cruise EN622 during September 2018Time of deployment as julian day time_julian_day
Dissolved trace metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) concentrations from depth profile samples collected on the 2018 EXPORTS cruise (RR1813) to the subarctic North Pacific near Ocean Station PAPA (Station P) on R/V Roger RevelleDay of year sampled. JULIAN_DAY
Dissolved trace metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) and labile particulate elemental (P, V, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) concentrations from shipboard incubation experiments conducted on the 2018 EXPORTS cruise (RR1813) near Ocean Station PAPADay of year sampled. JULIAN_DAY
Total dissolved gaseous mercury in surface waters and in the atmosphere collected aboard the R/V Kilo Moana in the tropical Pacific Ocean from October 2011.Julian day given in Greenwich Mean Time Julian_day
Extracted chlorophyll data, particulate carbon and nitrogen, flow cytometry and 15N2/13C rate measurements collected during EN596 from April 2017 in the North AtlanticJulian day of station and cast Julian_day
Phytoplankton diagnostic pigments from HPLC from samples collected on R/V Endeavor cruise EN614 in the tropical North Atlantic during May 2018Julian day number sdy
Hydrographic data collected during casts with a CTD-rosette system on R/V Endeavor cruise EN614 from May to June 2018Julian days TimeJ
Dissolved, inorganic nutrient data integrated with bottle data from R/V Endeavor cruise EN614 in May 2018Julian day (UTC) TimeJ
Dissolved, inorganic nutrient data integrated with bottle data from R/V Endeavor cruise EN614 in May 2018Standard deviation of TimeJ TimeJ_SD
Bottle data from CTD casts conducted on R/V Endeavor cruise EN640 from June-July 2019Julian day (UTC) TimeJ
Bottle data from CTD casts conducted on R/V Endeavor cruise EN640 from June-July 2019Standard deviation of TimeJ TimeJ_SD
Phytoplankton diagnostic pigments from HPLC from samples collected on R/V Endeavor cruise EN640 in the tropical North Atlantic during June-July 2019Julian day number Julian_day
Binned profiles of CTD measurements from R/V Endeavor cruise EN640 from June-July 2019Julian day (UTC) TimeJ
Dissolved, inorganic nutrient data integrated with bottle data from R/V Endeavor cruise EN640 in June-July 2019Julian day (UTC) TimeJ
Dissolved, inorganic nutrient data integrated with bottle data from R/V Endeavor cruise EN640 in June-July 2019Standard deviation of TimeJ TimeJ_SD
Carbonate chemistry analyses (total alkalinity, DIC, and d13C of DIC) from discrete bottle samples and CTD data from 12 stations sampled during R/V Endeavor cruise EN669 in the Gulf of Maine during August 2021Julian time TimeJ
Event Logs from R/V Kilo Moana KM0812, KM0919 in the North Pacific Subtropical Gyre north of Hawaii from 2008-2009 (C-MORE project, Silica Cycling project)Julian Day Julian_Day
Dissolved trace metal and macronutrient concentrations from field samples collected during the EXPORTS North Atlantic campaign at the Porcupine Abyssal Plain-Sustained Observatory (PAP-SO) site on board the RRS Discovery (DY131) in May 2021Julian Day of field sampling deployment. JULIAN_DAY
CTD data from 4 floats near the West Antarctic Peninsula (WAP) shelf near Marguerite Bay from ARSV Laurence M. Gould LMG0302 in the Southern Ocean from 2003-2003 (SOGLOBEC project)interval of time in days and fractions of a day since January 1, 4713 BC Greenwich midnight. julian_date_gmt
Global observations Prochlorococcus, Synechococcus, and picoeukaryotic phytoplankton with ancillary environmental data from 1987 to 2008Julian day Day
Coarse aerosol iron (Fe) collected on the US GEOTRACES Arctic cruise (HLY1502, GN01) from August to October 2015Sampling start Julian day Julian_Day
Fine aerosol iron (Fe) collected on the US GEOTRACES Arctic cruise (HLY1502, GN01) from August to October 2015Sampling start Julian day Julian_Day
Soluble Ionic Species (Coarse) in aerosols collected on the US GEOTRACES Arctic cruise (HLY1502, GN01) from August to October 2015 from from August to October 2015Sampling start Julian day Julian_Day
Concentrations of deionized water-soluble aerosol trace elements collected from bulk aerosol samples on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from Sept-Oct 2018Sampling start Julian day Julian_Day
Concentrations of deionized water-soluble aerosol trace elements collected from bulk aerosol samples on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES PMT cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018Sampling start Julian day Julian_Day