Atmospheric Deposition of
Current-Use and Historic-Use
Pesticides in Snow at National
Parks in the Western United States
Kimberly J. Hageman
Staci L. Simonich
Donald H. Campbell
Glenn R. Wilson
Dixon H. Landers
10.1021/es060157c.s001
https://acs.figshare.com/articles/journal_contribution/Atmospheric_Deposition_of_Current_Use_and_Historic_Use_Pesticides_in_Snow_at_National_Parks_in_the_Western_United_States/3222256
The United States (U.S.) National Park Service has
initiated research on the atmospheric deposition and fate
of semi-volatile organic compounds in its alpine, sub-Arctic, and Arctic ecosystems in the Western U.S. Results
for the analysis of pesticides in seasonal snowpack
samples collected in spring 2003 from seven national
parks are presented herein. From a target analyte list of
47 pesticides and degradation products, the most frequently
detected current-use pesticides were dacthal, chlorpyrifos,
endosulfan, and γ-hexachlorocyclohexane, whereas the
most frequently detected historic-use pesticides were dieldrin,
α-hexachlorocyclohexane, chlordane, and hexachlorobenzene. Correlation analysis with latitude, temperature, elevation,
particulate matter, and two indicators of regional pesticide
use reveal that regional current and historic agricultural
practices are largely responsible for the distribution of
pesticides in the national parks in this study. Pesticide
deposition in the Alaskan parks is attributed to long-range
transport because there are no significant regional
pesticide sources. The percentage of total pesticide
concentration due to regional transport (%RT) was calculated
for the other parks. %RT was highest at parks with
higher regional cropland intensity and for pesticides with
lower vapor pressures and shorter half-lives in air.
2006-05-15 00:00:00
pesticide deposition
RT
pesticide concentration
cropland intensity
target analyte list
snowpack samples
United States
Atmospheric Deposition
pesticide sources
pesticide use
degradation products
vapor pressures
spring 2003
47 pesticides
Western U.S
Alaskan parks
National Parks
Western United States
Arctic ecosystems
Correlation analysis