---TITLE: Alaska Temperature Data ---AUTHORS: -Jeff Welker (PI), Jace Fahnestock (co-PI) -Natural Resource Ecology Lab, Colorado State University, Fort Collins, CO 80523-1499 -telephone 970-491-1796; facsimile 970-491-1965; e-mail jwelker@nrel.colostate.edu -data questions: jace@nrel.colostate.edu ---DATA SET OVERVIEW: -These data sets are raw temperature data collected at various sites in Alaska and for various studies from 1995 through 2001. Many of the data sets were collected along the Dalton Highway from Prudhoe Bay to Fairbanks or in other sites like Council and Barrow to characterize overwinter soil surface temperatures as part of our winter CO2 flux measurements. Other measurements were taken at Toolik Lake in experimental climate change plots (e.g., increased winter snow accumulation, elevated summer temperature plots, increased litter plots). All the data were collected using HOBO dataloggers. Unless otherwise indicated, air temperatures were collected at 1.6 m and soil temperatures were collected at 1cm below the soil surface. Measurements made at other soil depths or snow depths are indicated. All data is given in degrees C. Data set titles indicate the year the data set collection was initiated (1995-2000), followed by a "w" or "s" to indicate winter or summer measurements, followed by a three letter code for site data was collected at (tlk=Toolik Lake, gal=Galbraith, hpv=Happy Valley, pru=Prudhoe Bay, cnl=Council, liv=Livengood, ps2=Pump Station 2, yuk=Yukon River, bar=Barrow, gcr=Gold Creek, kan=Kanuti River, fai=Fairbanks, cha=Chandalar, gra=Grayling Lake), and, in some cases, followed by an indication of the community measurements were taken in (dh=Dry heath tundra, mt=Moist acidic tundra, c=Clearcut forest, sb=Snowbed Cassiope community, s=Wet sedge, t=tussock tundra, f=spruce forest, l=litter). More complete description of each data set is provided below. ---INSTRUMENT DESCRIPTION: -Temperature was collected in all sites using HOBO dataloggers. Measurement intervals are given in the date and time columns. ---DATA COLLECTION and PROCESSING: -The HOBOs that we used are individual autonomous dataloggers that download raw data directly into a PC. ---DATA FORMAT: -Data are in 53 space delimited ASCII spreadsheets. Headings are date, time, and temperature (in one or more columns depending on the number of locations at a site that temperature was measured). -Missing data indicated with -99.99. -DATA VERSION= 1.0 (09 March 2002) FINAL. ---DATA REMARKS: -Temperature data are provided in raw form in order to provide the widest possible range of data compression or summation by other users. Missing data are indicated by -99.99. ---ADDITIONAL DOCUMENTATION -For each data set, we provide below a brief description of the site, inclusive dates of temperature measurements, file name where the actual data can be viewed, and a list of the temperature measurement locations for that site. The list of measurement locations corresponds directly with the temperature columns in the spreadsheet. -Data set descriptions are generally arranged from earliest data (1995) to most recent data (2001). -Approximate location of each study site is: Barrow 71.18N 156.40W, Chandalar Shelf 68.03N 149.36W, Council - High Shrub 64.47N 163.46W, Council - Low Shrub 64.50N 163.42W, Council - Forest 64.51N 163.41W, Council - Woodland 64.51N 163.41W, Council - Tundra 64.50N 163.42W, Galbraith 68.25N 149.37W, Gold Creek 67.30N 149.50W, Grayling Lake 66.58N 150.21W, Happy Valley 69.17N 148.82W, Kanuti River 66.26N 150.37W, Livengood 65.29N 148.30W, Prudhoe Bay 70.07N 148.29W, Pump Station-2 69.30N 148.63W, Toolik Lake - Dry heath 68.38N149.38W, Toolik Lake - Moist tussock 68.38N149.38W, Yukon 65.53N 149.45W SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 5/31/95-8/14/95 FILE NAME: 1995s_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, 15cm air in warmed plots, 15cm air in control plots, 1cm soil depth in warmed plots, 1cm soil depth in ambient plots SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 5/31/95-8/14/95 FILE NAME: 1995s_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, 15cm air in warmed plots, 15cm air in control plots, 1cm soil depth in warmed plots, 1cm soil depth in ambient plots SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 8/17/95-6/15/96 FILE NAME: 1995w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, Soil surface 5m from snowfence, Soil surface 10m from snowfence, Soil surface 15m from snowfence, Soil surface 20m from snowfence, Soil surface 25m from snowfence, Soil surface 30m from snowfence, Soil surface 40m from snowfence, Soil surface 50m from snowfence, Soil surface 60m from snowfence SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 8/17/95-6/15/96 FILE NAME: 1995w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, Soil surface 5m from snowfence, Soil surface 10m from snowfence, Soil surface 15m from snowfence, Soil surface 20m from snowfence, Soil surface 25m from snowfence, Soil surface 30m from snowfence, Soil surface 40m from snowfence, Soil surface 50m from snowfence, Soil surface 60m from snowfence SITE: Toolik Lake - snowbed community (Cassiope) INCLUSIVE DATES: 8/17/95-6/15/96 FILE NAME: 1995w_tlk_sb MEASUREMENT LOCATIONS: Soil surface (mean of 5 dataloggers) SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 6/19/96-8/14/96 FILE NAME: 1996s_tlk_dh MEASUREMENT LOCATIONS: Soil surface 15m from snowfence (mean of 4), Soil surface 20m from snowfence (mean of 5), Soil surface 50m from snowfence SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 8/21/96-6/10/97 FILE NAME: 1996w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, Soil surface 5m from snowfence, Soil surface 10m from snowfence, Soil surface 20m from snowfence, Soil surface 30m from snowfence, Soil surface 40m from snowfence, Soil surface 50m from snowfence, Soil surface 60m from snowfence, Soil surface 70m from snowfence, Soil surface 90m from snowfence SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 8/21/96-6/10/97 FILE NAME: 1996w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, Soil surface 5m from snowfence, Soil surface 10m from snowfence, Soil surface 20m from snowfence, Soil surface 30m from snowfence, Soil surface 40m from snowfence, Soil surface 50m from snowfence, Soil surface 60m from snowfence, Soil surface 70m from snowfence, Soil surface 90m from snowfence SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 6/12/97-8/25/97 FILE NAME: 1997s_tlk_dh MEASUREMENT LOCATIONS: 15cm air in warmed plots, 15cm air in control plots, 1cm soil depth in warmed plots w/ ambient winter snow, 1cm soil depth in ambient plots w/ ambient winter snow, 1cm soil depth in warmed plots w/ increased winter snow, 1cm soil depth in ambient plots w/ increased winter snow SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 6/12/97-8/25/97 FILE NAME: 1997s_tlk_mt MEASUREMENT LOCATIONS: 15cm air in warmed plots, 15cm air in control plots, 1cm soil depth in warmed plots w/ ambient winter snow, 1cm soil depth in ambient plots w/ ambient winter snow, 1cm soil depth in warmed plots w/ increased winter snow, 1cm soil depth in ambient plots w/ increased winter snow SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 8/28/97-7/2/98 FILE NAME: 1997w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, Soil surface 5m from snowfence, Soil surface 10m from snowfence, Soil surface 15m from snowfence, Soil surface 20m from snowfence, Soil surface 30m from snowfence, Soil surface 40m from snowfence, Soil surface 50m from snowfence, Soil surface 70m from snowfence, Soil surface 90m-1 from snowfence, Soil surface 90m-2 from snowfence SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 8/28/97-7/2/98 FILE NAME: 1997w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air-1, 1.6m air-2, Soil surface 5m from snowfence, Soil surface 15m from snowfence, Soil surface 30m from snowfence, Soil surface 60m from snowfence, Soil surface 70m from snowfence, Soil surface 90m-1 from snowfence, Soil surface 90m-2 from snowfence SITE: Toolik Lake - snowbed community (Cassiope) INCLUSIVE DATES: 8/28/97-5/27/98 FILE NAME: 1997w_tlk_sb MEASUREMENT LOCATIONS: Soil surface (2 sites) SITE: Toolik Lake - litter/no litter plots INCLUSIVE DATES: 6/20/97-7/2/98 FILE NAME: 1997w_tlk_l MEASUREMENT LOCATIONS: 1cm soil depth in plots with litter, 1cm soil depth in plots with no litter SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 5/20/98-8/22/98 FILE NAME: 1998s_tlk_dh MEASUREMENT LOCATIONS: 15cm air in control plots, 15cm air in warmed plots, 1cm soil depth in control plots, 1cm soil depth in warmed plots SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 5/30/98-8/22/98 FILE NAME: 1998s_tlk_mt MEASUREMENT LOCATIONS: 15cm air in control plots, 15cm air in warmed plots, 1cm soil depth in control plots, 1cm soil depth in warmed plots SITE: Barrow - wet sedge tundra nearcmDL INCLUSIVE DATES: 8/20/98-6/15/99 FILE NAME: 1998w_bar MEASUREMENT LOCATIONS: 1.0m air, Soil surface, 5cm soil depth, 20cm soil depth, 40cm soil depth SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 8/27/98-6/5/99 FILE NAME: 1998w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, 1cm soil depth in ambient snow, 5cm soil depth in ambient snow, 20cm soil depth in ambient snow, 1cm soil depth in deep snow, 1m from soil surface in snow drift, 2m from soil surface in snow drift SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 8/27/98-6/5/99 FILE NAME: 1998w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, 1cm soil depth in ambient snow, 1cm soil depth in deep snow, 1m from soil surface in snow drift, 2m from soil surface in snow drift SITE: Toolik Lake - sedge site INCLUSIVE DATES: 8/27/98-6/5/99 FILE NAME: 1998w_tlk_s MEASUREMENT LOCATIONS: 5cm soil depth, 30cm soil depth SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 6/6/99-8/26/99 FILE NAME: 1999s_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, 15cm air in control plots, 15cm air in warmed plots, 1cm soil depth in control plots, 1cm soil depth in warmed plots SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 6/6/99-8/26/99 FILE NAME: 1999s_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, 15cm air in control plots, 15cm air in warmed plots, 1cm soil depth in control plots, 1cm soil depth in warmed plots SITE: Barrow - wet sedge tundra nearcmDL INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_bar MEASUREMENT LOCATIONS: Soil surface SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, 1cm soil depth in deep snow, 1cm soil depth in ambient snow SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, 1cm soil depth in deep snow, 1cm soil depth in ambient snow SITE: Livengood - spruce forest INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_liv_f MEASUREMENT LOCATIONS: Soil surface SITE: Yukon - spruce forest INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_yuk_f MEASUREMENT LOCATIONS: Soil surface SITE: Kanuti River - tussock tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_kan_t MEASUREMENT LOCATIONS: Soil surface SITE: Grayling Lake - tussock tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_gra MEASUREMENT LOCATIONS: Soil surface SITE: Gold Creek - open woodland INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_gcr MEASUREMENT LOCATIONS: Soil surface SITE: Chandalar Shelf - willow shrubs INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_cha MEASUREMENT LOCATIONS: Soil surface SITE: Pump Station 2 - wet sedge tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_ps2 MEASUREMENT LOCATIONS: Soil surface SITE: Prudhoe Bay - wet sedge tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_pru MEASUREMENT LOCATIONS: Soil surface SITE: Happy Valley - tussock tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_hpv MEASUREMENT LOCATIONS: Soil surface SITE: Galbraith - tussock tundra INCLUSIVE DATES: 8/27/99-6/21/00 FILE NAME: 1999w_gal MEASUREMENT LOCATIONS: Soil surface SITE: Council - tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_cnl MEASUREMENT LOCATIONS: 1.6m tundra air, 1.6m forest air, Tundra soil surface, Forest soil surface, High Shrub soil surface, Low Shrub soil surface, Woodland soil surface SITE: Prudhoe Bay - wet sedge tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_pru MEASUREMENT LOCATIONS: Soil surface SITE: Pump Station 2 - wet sedge tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_ps2 MEASUREMENT LOCATIONS: Soil surface SITE: Happy Valley - tussock tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_hpv MEASUREMENT LOCATIONS: Soil surface SITE: Galbraith - tussock tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_gal MEASUREMENT LOCATIONS: Soil surface SITE: Chandalar Shelf - willow shrub INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_cha MEASUREMENT LOCATIONS: Soil surface SITE: Gold Creek - open woodland INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_gcr MEASUREMENT LOCATIONS: Soil surface SITE: Grayling Lake - tussock tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_gra MEASUREMENT LOCATIONS: Soil surface SITE: Kanuti River - spruce forest INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_kan_f MEASUREMENT LOCATIONS: Soil surface SITE: Kanuti River - tussock tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_kan_t MEASUREMENT LOCATIONS: Soil surface SITE: Yukon - spruce forest INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_yuk_f MEASUREMENT LOCATIONS: Soil surface SITE: Yukon - clearcut INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_yuk_c MEASUREMENT LOCATIONS: Soil surface SITE: Livengood - spruce forest INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_liv_f MEASUREMENT LOCATIONS: Soil surface SITE: Livengood - clearcut INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_liv_c MEASUREMENT LOCATIONS: Soil surface SITE: Fairbanks - spruce forest INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_fai_f MEASUREMENT LOCATIONS: Soil surface SITE: Fairbanks - clearcut INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_fai_c MEASUREMENT LOCATIONS: Soil surface SITE: Toolik Lake - dry heath tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_tlk_dh MEASUREMENT LOCATIONS: 1.6m air, Soil surface in ambient snow, Soil surface in deep snow SITE: Toolik Lake - moist tussock tundra INCLUSIVE DATES: 9/22/00-6/30/01 FILE NAME: 2000w_tlk_mt MEASUREMENT LOCATIONS: 1.6m air, Soil surface in deep snow, 1m from soil surface in snow drift, 2m from soil surface in snow drift