uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read 97dltld.3 Arctic LTER Program Gus Shaver

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

Associated Researcher 1999 Daily weather data file for Arctic Tundra LTER site at Toolik Lake. Included are daily averages and/or maximums and minimums of air, soil and lake temperature, wind speed, vapor pressure, and sum of global radiation and unfrozen precipitation recorded near Toolik Lake. weather temperature wind rain daily 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/tl/xlsfiles/97dltld.html University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 38'N, 149 degrees 36'W) -149.596001285 -149.596001285 68.628228973 68.628228973 1997-05-01 1997-09-01 Log of changes: 10Sept97 Rechecked values 6Dec99 Updated date and year to four digits. Changed variable names to the unified names and order. JL For Archival Use: DATE RECEIVED: Aug1997, Jun1997 DATA FILE ENTERED BY: Jim Laundre DATA FILE VALIDATION: NAME:Jim Laundre 03 Sept 1997 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/ Weather data has been collected at Toolik Lake by a Campbell 21x datalogger since June 1988. Sensors that are measured every minute and averaged or totaled every hour include: air temperature and relative humidity at 1 and 5 meters, wind speed at 1 and 5 meters, wind direction at 5 meters, global solar radiation, photosynthetically active radiation, net radiation (Fritschen type), barometric pressure, and unfrozen precipitation. Sensors measured every 10 minutes and averaged every three hours include: soil temperatures, lake temperature, lake depth, and evaporation pan depth and pan water temperature. Net radiation and pan evaporation are only measured during the summer months. The hourly data are in the file 97DLTLH.DAT, the three hourly data are in 97DLTLO.DAT, and daily summaries are in 97DLTLD.DAT. A second Campbell 21x datalogger about 700 meters from the main weather station logs air and soil temperatures and photosynthetically active radiation in the experimental treatment plots. Treatments include greenhouse, shading, and fertilization. In the control plot wind speed and direction, global solar radiation and unfrozen precipitation are also measured. This station is also used as a backup to the main weather station. The full description of the sensors and site is in file SENSORS.DOC. The original data is in file 97DLTDAT.ZIP, which is archived at The Marine Biological Lab, Woods Hole, MA. Notes: Wind speed less than .447 is considered calm. Radiation data was not totaled for the winter months since no attempt was made to keep sensors snow and frost free. Lake temperature is measured near the lake depth sensor. Therefore the lake depth measurements give the depth at which lake temperature is measured. Data was lost from 168 to 176 when logger memory filled. Late August soil profile #1 at 50 and 100 cm could not be reset. They were put in at 20 cm shallower. Using set 2 for daily temperature. Sampling Description. VAPOR PRESS 5M: Daily average of the following hourly calculation. 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 J CM2 : Daily sum of PYRANOMETER * 0.3600 jcm2 * 1000 Watt/Kwatt QUANTUM Mol/m2: (Daily sum of Quantum)*60sec*60 min* 10^-6 umol/mol pers-1 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 97dltld.csv Daily weather data file for Arctic Tundra LTER site at Toolik Lake, Arctic LTER 1997. 97dltld.csv 1 \r\n column , " http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1532&urlTail=weather/tl/data/97dltld.csv YEAR YEAR Year in yyyy Year in yyyy DATE DATE Date dd-mon-yyyy Month Month Month of collection mon ID ID Datalogger program step. number real #N/A Missing or Not Measured JULIAN JULIAN Julian date ddd Rain Rain Total daily rain millimeter real #N/A Missing or Not Measured AT 1M AT 1M Daily average Air temperature at 1 celsius real #N/A Missing or Not Measured AT 5M AT 5M Daily average Air temperature at 5 celsius real #N/A Missing or Not Measured ATMAX 1M ATMAX 1M Maximum temperature at 1 meter celsius real #N/A Missing or Not Measured ATMAX HR 1M ATMAX HR 1M Time of maximum air temperature at 1 meters 2400 hh24mi #N/A Missing or Not Measured ATMAX 5M ATMAX 5M Maximum air temperature at 5 meter celsius real #N/A Missing or Not Measured ATMAX HR 5M ATMAX HR 5M Time of maximum air temperature at 5 meters 2400 hh24mi #N/A Missing or Not Measured ATMIN 1M ATMIN 1M Minimum air temperature at 1 meter celsius real #N/A Missing or Not Measured ATMIN HR 1M ATMIN HR 1M Time of minimum air temperature at 1 meter 2400 hh24mi #N/A Missing or Not Measured ATMIN 5M ATMIN 5M Minimum air temperature at 5 meters celsius real #N/A Missing or Not Measured ATMIN HR 5M ATMIN HR 5M Time of minimum air temperature at 5 meter 2400 hh24mi #N/A Missing or Not Measured WSMAX 1M WSMAX 1M Wind Speed Maximum at 1 meter meterPerSecond real #N/A Missing or Not Measured WSMAX HR 1M WSMAX HR 1M Time of wind speed Max at 1M hh24mi #N/A Missing or Not Measured WSMAX 5M WSMAX 5M Wind Speed Maximum at 5 meter meterPerSecond real #N/A Missing or Not Measured WSMAX HR 5M WSMAX HR 5M Time of wind speed Max at 5M hh24mi #N/A Missing or Not Measured WIND SP 1M WIND SP 1M Daily average wind speed at 1 meter meterPerSecond real #N/A Missing or Not Measured WIND SP 5M WIND SP 5M Daily average wind speed at 5 meter meterPerSecond real #N/A Missing or Not Measured Vapor Press Vapor Press Avg. Vapor Pressure at 5 meters millibar real #N/A Missing or Not Measured Pyr j/cm2 Pyr j/cm2 Total joules per sq cm per day joulePerCentimeterSquaredPerDay real #N/A Missing or Not Measured Quantum Quantum Mol/m2/day Photosynthetical Active Radiation molePerMeterSquaredPerDay real #N/A Missing or Not Measured Moss2 Temp Moss2 Temp Soil moss layer temperature - set 2 celsius real #N/A Missing or Not Measured Soil2 5cm Soil2 5cm Soil temperature at 5 cm - set 2 celsius real #N/A Missing or Not Measured Soil2 10cm Soil2 10cm Soil temperature at 10 cm - set 2 celsius real #N/A Missing or Not Measured Soil2 20cm Soil2 20cm Soil temperature at 20 cm - set 2 celsius real #N/A Missing or Not Measured Soil2 50cm Soil2 50cm Soil temperature at 50 cm - set 2 celsius real #N/A Missing or Not Measured Soil2 100cm Soil2 100cm Soil temperature at 100 cm - set 2 celsius real #N/A Missing or Not Measured Soil2 150cm Soil2 150cm Soil temperature at 150 cm - set 2 celsius real #N/A Missing or Not Measured Lake Temp Lake Temp Lake water temperature at approx. 2 m (see notes) Celsius celsius real #N/A Missing or Not Measured Comments Comments Notes on data Notes on data 365 97dltld.xls An excel file that has worksheets with the metadata and data. 97dltld.xls Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1532&urlTail=weather/tl/xlsfiles/97dltld.xls Microsoft Excel file meters per second Amount of energy per square centimeter surface per day Moles of substance per square meter per day