uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read 94dltuh.3 Arctic LTER Program Gus Shaver

Marine Biological Laboratory The Ecosystems Center 7 MBL Street Woods Hole MA 02543 USA

Arctic LTER Program

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ Jim Laundre

Marine Biological Laboratory The Ecosystems Center 7 MBL Street Woods Hole MA 02543 USA

Associated Researcher 1996 Hourly weather data from the Toolik Tussock Experimental plots, Arctic LTER 1994. In 1990 a Campbell CR21x datalogger was installed in block 2 of the Toolik LTER experimental tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in a control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized sites. weather temperature relative humidity radiation wind Acceptance and utilization of LTER data requires that: The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions. The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications A copy of any resultant publications should be sent to: Principal Investigator Ecosystems Center Marine Biological Laboratory Woods Hole, MA 02543 http://ecosystems.mbl.edu/ARC/meta_template.php?FileName=./weather/tu/xlsfiles/94dltuh.html Toolik Lake Field Station (68 38' N, 149 36'W)., LTER tussock site on hill south of Toolik Lake, North Slope of Alaska. -149.609589 -149.609589 68.624411 68.624411 1994-05-01 1994-09-01 Log of changes: 17Nov92 Collated data from .dat files and added form notes. JL 29Dec92 Deleted data when battery dropped below 9 volts on 92244. JL Apr96 Finished entering data and documenting JL 19Oct00 Added year and y2k date. Standardized the variables across years. Change control RH to #N/A. JimL For Archival Use: DATE RECEIVED:1996 DATA FILE ENTERED BY:Jim Laundre DATA FILE VALIDATION: 2Apr96 NAME: DATE: Version 3: Metadata updated to newer form (with sites sheet). Units updated to current standards. Discrepancy with variable names fixed. CH April 2013. Data Manager

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ ARC LTER

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ A Campbell CR21x datalogger, in the Arctic LTER acidic experimental plots (block 2), is used to monitor weather and soil temperatures. Sensors in the control plot include: global solar radiation, photosynthetically active radiation, unfrozen precipitation, air temperature, relative humidity, wind speed, and wind direction at 3 meters. Additional seasons in greenhouses and shade houses plots measure air temperature, relative humidity and photosynthetically active radiation during the growing season. These sensors are read every minute and averaged or totaled every hour. Two profiles of soil temperature are measured per treatment plot with copper/constantin thermocouple wires (TC) installed at depths of 10, 20, and 40 cm in inter-tussock areas. The following label codes are used: CT = control, GH = greenhouses, SH = shade houses, F = fertilized, GF= greenhouse fertilized, SF = shade house fertilized, plus a 1 or a 2 for the profile number. All soil sensors are read every 15 minutes and averaged every 3 hours. Hourly, three hourly and daily summaries are in files yyDLTUH.DAT, yyDLTUO.DAT, and yDLTUD.DAT respectively, where yy is the year in which the data are collected. The original data are in file yyDLTDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA. Note: The covers on greenhouses and shade houses are removed every fall and reinstalled every spring. Notes: For the global solar radiation and photosynthetically active radiation sensors no attempt is made to correct for frost or snow on the sensors during the winter months. Therefore winter radiation data should be view as suspect and used only qualitatively. Wind speeds less then .447 are considered calm. Control relative humidity never exceeded 75% because of a bad sensor. Data was deleted. Soil temperatures are problematic since frost heaving of the probes caused depth of measurements to change. Missing values are indicated by #N/A Reference Citations: Buck, A.L. 1981 New equations for computing vapor pressure and enhancement factor. Journal of Applied Meteorology 20:1527-1532. Sampling Description. DAYS: JULIAN + (HOUR/2400) VAPOR PRESS : If Air Temp > 0 then (RH 5M/100) * 6.1121 * exp(17.368 * AIR TEMP 5M/(238.88 + AIR TEMP 5M)) If Air Temp < 0 then (RH 5M/100) * 6.1121 * exp(17.966 * AIR TEMP 5M/(238.88 + AIR TEMP 5M)) (Buck,1981) PYR TOTAL CM2 HOUR: PYRANOMETER * 0.3600 jcm2 * 1000 Watt/Kwatt GQUANTUM E m2: Average (north and south quantum sensors) *60 sec *60 min * 10^-6 E/uE GQUANTUM E m2: Average (north and south quantum sensors) *60 sec *60 min * 10^-6 E/uE GQUANTUM E m2: Control quantum sensor *60 sec *60 min * 10^-6 E/uE pers-1 John Hobbie

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 jhobbie@mbl.edu Lead PI Gus Shaver

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 gshaver@mbl.edu Lead PI Jim Laundre

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_imr@mbl.edu Information Manager The goal of Arctic LTER project is to predict the future ecological characteristics of the site based upon our knowledge of the controls of ecosystem structure and function as exerted by physical setting and geologic factors, climatic factors, biotic factors, and the changes in fluxes of water and materials from land to water. To achieve this goal the Arctic LTER uses several approaches: Long-term monitoring and surveys of natural variation of ecosystem characteristics in space and time. Includes: climate, plant communities and productivity, thaw depth, stream flow, chemistry of streams and lakes, temperatures of streams and lakes, lake chlorophyll lake productivity, zooplankton abundance. Experimental manipulation of ecosystems for years and decades. Includes: tundra warming, shading, and fertilizing, grazer exclusions, fertilization of lakes and streams, addition and subtraction of predators. Synthesis of results and predictive modeling at ecosystem and watershed scales. Includes: stream N cycling, lake physics, bioenergetics of fish populations, water movement and transfer of DOC and nutrients from land to water, soil respiration, cycling and storage of C in tundra under different scenarios of future climates. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The Arctic LTER research site (68°N and 149°W) is in the foothills region of the North Slope of Alaska and includes the entire Toolik Lake watershed and the adjacent watershed of the upper Kuparuk River, down to the confluence of these two watersheds. This area is typical of the northern foothills of the Brooks Range, with continuous permafrost, no trees, a complete snow cover for 7 to 9 months, winter ice cover on lakes, streams, and ocean, and cessation of river flow during the winter. Tussock tundra vegetation of sedges and grasses mixed with dwarf birch and low willows form the dominant vegetation type with areas of drier heath tundra on ridge tops and other well-drained sites as well as areas of river-bottom willow communities. -149.75 -149.0433 68.8 68.5 610 1360 meter 94dltuh.csv Hourly weather data from the Toolik Tussock Experimental plots, Arctic LTER 1994. 94dltuh.csv 1 \r\n column , " http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1561&urlTail=weather/tu/data/94dltuh.csv YEAR YEAR Year yyyy DATE DATE Date dd-mon-yyyy MONTH MONTH Month mm DAYS DAYS Julian plus fraction of day ddd ID ID Program step that output the data Program step that output the data JULIAN JULIAN Julian Date ddd HOUR HOUR Time -Alaska standard time hhrr RAIN RAIN Rainfall millimeter real #N/A=Missing or Not Measured code for missing values GTEMP S GTEMP S Greenhouse temperature south end of greenhouse in Celsius celsius real #N/A=Missing or Not Measured code for missing values GTEMP N GTEMP N Greenhouse temperature north end of greenhouse in Celsius celsius real #N/A=Missing or Not Measured code for missing values GTEMP Avg GTEMP Avg Average of GTEMP N and GTEMP S in Celsius celsius real #N/A=Missing or Not Measured code for missing values STEMP S STEMP S Shade house temperature south end of shade house Celsius celsius real #N/A=Missing or Not Measured code for missing values STEMP N STEMP N Shade house temperature north end of shade house Celsius celsius real #N/A=Missing or Not Measured code for missing values STEMP Avg STEMP Avg Average of STEMP N and STEMP S in Celsius celsius real #N/A=Missing or Not Measured code for missing values CTEMP 3M CTEMP 3M Control temperature at 3m in Celsius celsius real #N/A=Missing or Not Measured code for missing values GRH S GRH S Greenhouse % Relative Humidity south percent real #N/A=Missing or Not Measured code for missing values GRH N GRH N Greenhouse % Relative Humidity north percent real #N/A=Missing or Not Measured code for missing values SRH S SRH S Shade house % Relative Humidity south percent real #N/A=Missing or Not Measured code for missing values SRH N SRH N Shade house % Relative Humidity north percent real #N/A=Missing or Not Measured code for missing values CRH 3M CRH 3M Control Relative Humidity at 3m percent real #N/A=Missing or Not Measured code for missing values GQUANT S GQUANT S Greenhouse Quantum south uEinstein m-2 sec-1 microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values GQUANT N GQUANT N Greenhouse Quantum north uEinstein m-2 sec-1 microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values GQUANT E GQUANT E m2 Average of GQUANT N and GQUANT S in E m-2 per hour microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values SQUANT S SQUANT S Shade house Quantum south uEinstein m-2 sec-1 microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values SQUANT N SQUANT N Shade house Quantum north uEinstein m-2 sec-1 microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values SQUANT E SQUANT E m2 Average of SQUANT N and SQUANT S in E m-2 per hour microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values CQUANT CQUANT Control Quantum uEinstein m-2 microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values CQUANT E CQUANT E m2 CQUANT in Einstein m-2 per hour microEinsteinPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values PYRANOMETER PYRANOMETER PYRANOMETER: global solar radiation (sun plus sky), averaged over measurement interval (kw/m-2/s-1) kilowattPerMeterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values NET RAD NET RAD Net radiation kilowatts m-2 sec-1 meterSquaredPerSecond real #N/A=Missing or Not Measured code for missing values WIND SPEED 3M WIND SPEED 3M Wind speed at 3 meters m/s meterPerSecond real #N/A=Missing or Not Measured code for missing values WIND MAG WIND MAG Wind vector magnitude at 3M meterPerSecond real #N/A=Missing or Not Measured code for missing values WIND DIR 3M WIND DIR 3M Wind direction at 3M degree real #N/A=Missing or Not Measured code for missing values WIND DIR STD WIND DIR STD Wind vector direction standard deviation degree real #N/A=Missing or Not Measured code for missing values VAPOR PRESS VAPOR PRESS Vapor pressure: mbar millibar real #N/A=Missing or Not Measured code for missing values PYR TOTAL CM2 HR PYR TOTAL CM2 HR Pyranometer per hour: joules/cm2/hr joulePerCentimeterSquaredPerHour real #N/A=Missing or Not Measured code for missing values WIND SECTOR WIND SECTOR The 45 degree sector which WIND DIR 3M is in , (N, NE, E, SE, S, SW, W, NW) OR CALM The 45 degree sector which WIND DIR 3M is in , (N, NE, E, SE, S, SW, W, NW) OR CALM COMMENTS COMMENTS Comments about individual datum points. Comments about individual datum points. 8760 94dltuh.xls An excel file that has worksheets with the metadata and data. 94dltuh.xls Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1561&urlTail=weather/tu/xlsfiles/94dltuh.xls Microsoft Excel file ratio of two quantities as percent composition (1:100) micromoles (1E-06 moles of photons) per square meter per second (radiant flux density) Amount of energy per square meter surface per second meters squared per second meters per second Amount of energy per square centimeter surface per day