Dataset: Gaseous Elemental Reactive Mercury Flux

Methods

The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures

Current Methods

• Micrometeorological measurements of atmospher
  
  

  Direct, micrometeorological measurements of atmosphere-canopy exchanges of GEM were made using the modified Bowen-ratio method. This method involves measuring the concentration gradient of either temperature or water vapor and the turbulent flux of sensible or latent heat over the same height interval

• Sample composition
  
  

  To reflect a range of trophic levels, we sampled leaf litter, foliage, folivorous and carnivorous arthropods, a terrestrial salamander, an insectivorous passerine bird, and two carnivorous raptors. Salamanders and birds were sampled across a study area of c. 25 ha between 1075-1180 m elevation, while we collected leaf litter, foliage and arthropod samples at two sites 50 m apart at 1100 m elevation.

• Quality control
  
  

  Care was taken to ensure that samples were not contaminated, especially those that required manual handling (e.g., litter and foliage). We generally used latex gloves during sampling, and we cleaned sampling utensils with distilled water and/or 5% nitric acid. All samples were frozen within 2 hours of collection

Dataset Fields

Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data

Sampling Equipment

Equipment and software used to collect data, including how that equipment was used.

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection