ARCSS/TK water chemistry and epilithon characterization from the Noatak National Preserve, Kelly River region (2010) and Feniak Lake region (2011).


These data are from two remote field campaigns in the Noatak National Preserve. Various thermokarst features and their receiving streams were sampled and characterized. A suite of water chemistry (nutrients, major anions and cations, total suspended sediment) and benthic variables (particulate carbon, nitrogen and phosphorus, and chlorophyll-a) were measured at 6 major sites (2 in 2010 and 4 in 2011). There were additional sites sampled for water chemistry above and below thermokarst features in 2011.

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Published on EDI/LTER Data Portal

Citation Suggestion: 

Bowden, W. 2014. ARCSS/TK water chemistry and epilithon characterization from the Noatak National Preserve, Kelly River region (2010) and Feniak Lake region (2011). Environmental Data Initiative.

Date Range: 

Tuesday, July 20, 2010 to Sunday, July 31, 2011

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We measured total suspended sediment (TSS) in the Reference and Impacted reach using standard methods (USGS method I-3765). For each sample, a known volume of stream water was filtered in the field through a pre-dried (105°C) and pre-weighed 47-mm diameter glass fiber filter (GF/F) and re-dried and re-weighed. TSS was calculated as the difference in filter mass before and after filtration divided by the volume filtered (mg L-1). Turbidity sensors (DTS-12 from FTS Environmental, Victoria, BC, Canada) were installed in conjunction with automated ISCO samplers (Teledyne ISCO, Lincoln, NE, USA) to collect 5-minute turbidity measurements in the Reference and Impacted reaches for the 2010 season only.

A WTW handheld meter was used to measure pH, Specific Conductance, Temperature & Dissolved Oxygen.

Water samples for chemical analyses were collected as grab water samples. All water samples were filtered through pre-combusted (450°C) 25-mm diameter GF/Fs with a nominal pore size of 0.07 um, with the exception of the water designated for base cation analyses, which were filtered with nylon syringe filters with a pore size of 0.45um. Separate samples were taken for each analyte. Samples for soluble reactive ortho-phosphate (SRP or PO43--P), nitrate (NO3--N), and ammonium (NH4+-N) were frozen; samples for DOC (dissolved organic carbon), TDN (total dissolved nitrogen), TDP (total dissolved phosphorus); and base cations (calcium, Ca2+; magnesium, Mg2+; potassium, K+; and sodium, Na+); micronutrients and metals (aluminum, Al; iron, Fe; manganese, Mn; boron, B; copper, Cu; zinc, Zn; sulfur, S; strontium, Sr; lead, Pb; nickel, Ni; chromium, Cr; and cadmium, Cd) were acidified with 100ul 6N hydrochloric acid for every 50-mL of sample; and anions (chloride, Cl- and sulfate, SO42--S) and alkalinity samples were refrigerated. Samples were shipped back to the University of Vermont in Burlington, Vermont; the Ecosystems Center in Woods Hole, Massachusetts; or the University of Michigan for analysis within six to nine months. LTER Streams Protocols were followed.

Arctic LTER Streams Protocol

Version Changes: 

annual data is updated into new file
v1. October 2014: metadata added, file contains water chemistry data - JL

Sites sampled.

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