Zobrazeno 1 - 10
of 463
pro vyhledávání: '"D. Obrist"'
Autor:
T. Wang, B. Du, I. Forbrich, J. Zhou, J. Polen, E. M. Sunderland, P. H. Balcom, C. Chen, D. Obrist
Publikováno v:
Biogeosciences, Vol 21, Pp 1461-1476 (2024)
Estuaries are a conduit of mercury (Hg) from watersheds to the coastal ocean, and salt marshes play an important role in coastal Hg cycling. Hg cycling in upland terrestrial ecosystems has been well studied, but processes in densely vegetated salt ma
Externí odkaz:
https://doaj.org/article/253b1fec8e0d4a84bd4cdb5de16c263c
Publikováno v:
Biogeosciences, Vol 17, Pp 4025-4042 (2020)
Understanding the processes that influence and control carbon cycling in Arctic tundra ecosystems is essential for making accurate predictions about what role these ecosystems will play in potential future climate change scenarios. Particularly, air
Externí odkaz:
https://doaj.org/article/120f514e8ef448f3a3c8cc3494239b9c
Publikováno v:
Biogeosciences, Vol 16, Pp 4051-4064 (2019)
The tundra plays a pivotal role in the Arctic mercury (Hg) cycle by storing atmospheric Hg deposition and shuttling it to the Arctic Ocean. A recent study revealed that 70 % of the atmospheric Hg deposition to the tundra occurs through gaseous elem
Externí odkaz:
https://doaj.org/article/db781ee24bb34f09b4ae8c73f72879e4
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 6913-6929 (2019)
A total of 1360 weeks of mercury (Hg) wet deposition data were collected by the state of Alaska Department of Environmental Conservation and the U.S. National Park Service across five stations spanning up to 8 years. Here, we analyze concentration pa
Externí odkaz:
https://doaj.org/article/8dee09ea107b4d0a88c2a88f0a09b314
Publikováno v:
The Cryosphere, Vol 12, Pp 1939-1956 (2018)
In the Arctic, the snowpack forms the major interface between atmospheric and terrestrial cycling of mercury (Hg), a global pollutant. We investigated Hg dynamics in an interior Arctic tundra snowpack in northern Alaska during two winter seasons.
Externí odkaz:
https://doaj.org/article/03bada886b004f6395a3dd2e32b60fbd
Publikováno v:
Biogeosciences, Vol 13, Iss 16, Pp 4777-4788 (2016)
Iron oxide minerals play an important role in stabilizing organic carbon (OC) and regulating the biogeochemical cycles of OC on the earth surface. To predict the fate of OC, it is essential to understand the amount, spatial variability, and character
Externí odkaz:
https://doaj.org/article/58d58d2fb785464db92b53fe8fd61c71
Publikováno v:
Biogeosciences, Vol 12, Iss 12, Pp 3665-3680 (2015)
Biweekly snowpack core samples were collected at seven sites along two elevation gradients in the Tahoe Basin during two consecutive snow years to evaluate total wintertime snowpack accumulation of nutrients and pollutants in a high-elevation watersh
Externí odkaz:
https://doaj.org/article/6831d7e8e1874fc69ab20bd3d3c48ee1
Autor:
P. Weiss-Penzias, H. M. Amos, N. E. Selin, M. S. Gustin, D. A. Jaffe, D. Obrist, G.-R. Sheu, A. Giang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 3, Pp 1161-1173 (2015)
Atmospheric mercury (Hg) measurements using the Tekran® analytical system from five high-elevation sites (1400–3200 m elevation), one in Asia and four in the western US, were compiled over multiple seasons and years, and these data were compared w
Externí odkaz:
https://doaj.org/article/2bb44583730b46b5a272833a9b33f852
Publikováno v:
Biogeosciences, Vol 10, Iss 6, Pp 3793-3807 (2013)
Gaseous elemental mercury (GEM) was monitored at the Niwot Ridge (NWT) Long-Term Ecological Research (LTER) site (Colorado, USA, 40° N) from interstitial air extracted from the snowpack at depths ranging from the snow surface to 10 cm above the soil
Externí odkaz:
https://doaj.org/article/059a654eab0b4b6caa5a611fa88b350e
Publikováno v:
Atmospheric Measurement Techniques, Vol 6, Iss 6, Pp 1477-1489 (2013)
We describe further development of a previous laboratory prototype pulsed cavity ring-down spectroscopy (CRDS) sensor into a field-deployable system for high-time-resolution, continuous, and automated measurement of gaseous elemental mercury (GEM) co
Externí odkaz:
https://doaj.org/article/7aebfadc58704ac69aec47fd1bec5d23