The Foragers of Point Hope: the biology and archaeology of humans on the edge of the Alaskan Arctic

2015 ◽  
Vol 52 (12) ◽  
pp. 52-6467-52-6467
Keyword(s):  
Point Hope ◽  
Alaskan Arctic

A new Clitocybe from the Alaskan Arctic

1976 ◽  
Vol 54 (9) ◽  
pp. 976-980 ◽  
Author(s):  
Gary A. Laursen ◽  
Orson K. Miller Jr. ◽  
Howard E. Bigelow
Keyword(s):  
New Species ◽  
Beach Ridges ◽  
Microscopic Features ◽  
Alaskan Arctic ◽  
A New Species ◽  
High Center

A new species of Clitocybe is described from the Alaskan Arctic. This agaric grows on low-center polygon rims, high-center polygons, and on beach ridges. Drawings of microscopic features and macrophotographs are included.

scholarly journals Continuously amplified warming in the Alaskan Arctic: Implications for estimating global warming hiatus

2017 ◽  
Vol 44 (17) ◽  
pp. 9029-9038 ◽  
Author(s):  
Kang Wang ◽  
Tingjun Zhang ◽  
Xiangdong Zhang ◽  
Gary D. Clow ◽  
Elchin E. Jafarov ◽  
...  
Keyword(s):  
Global Warming ◽  
Global Warming Hiatus ◽  
Alaskan Arctic ◽  
Warming Hiatus

scholarly journals Hygroscopicity and composition of Alaskan Arctic CCN during April 2008

2011 ◽  
Vol 11 (8) ◽  
pp. 21789-21834
Author(s):  
R. H. Moore ◽  
R. Bahreini ◽  
C. A. Brock ◽  
K. D. Froyd ◽  
J. Cozic ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Cloud Condensation Nuclei ◽  
Anthropogenic Pollution ◽  
Organic Aerosol ◽  
International Polar Year ◽  
Mass Spectral ◽  
Aerosol Mass ◽  
Alaskan Arctic ◽  
Air Mass Types ◽  
The Individual

Abstract. We present a comprehensive characterization of cloud condensation nuclei (CCN) sampled in the Alaskan Arctic during the 2008 Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) project, a component of the POLARCAT and International Polar Year (IPY) initiatives. Four distinct air mass types were sampled including relatively pristine Arctic background conditions as well as biomass burning and anthropogenic pollution plumes. Despite differences in chemical composition, inferred aerosol hygroscopicities were fairly invariant and ranged from κ = 0.1–0.3 over the atmospherically-relevant range of water vapor supersaturations studied. Analysis of the individual mass spectral m/z 43 and 44 peaks from an aerosol mass spectrometer show the organic aerosols sampled to be well-oxygenated, consistent with with long-range transport and aerosol aging processes. However, inferred hygroscopicities are less than would be predicted based on previous parameterizations of biogenic oxygenated organic aerosol, suggesting an upper limit on organic aerosol hygroscopicity above which κ is less sensitive to the O:C ratio. Most Arctic aerosol act as CCN above 0.1 % supersaturation, although the data suggest the presence of an externally-mixed, non-CCN-active mode comprising approximately 0–20 % of the aerosol number. CCN closure was assessed using measured size distributions, bulk chemical composition measurements, and assumed aerosol mixing states; CCN predictions tended toward overprediction, with the best agreement (± 0–20 %) obtained by assuming the aerosol to be externally-mixed with soluble organics. Closure also varied with CCN concentration, and the best agreement was found for CCN concentrations above 100 cm−3 with a 1.5- to 3-fold overprediction at lower concentrations.

scholarly journals Seasonality buffers carbon budget variability across heterogeneous landscapes in Alaskan Arctic Tundra

2021 ◽  
Author(s):  
Josh Hashemi ◽  
Donatella Zona ◽  
Kyle A. Arndt ◽  
Aram Kalhori ◽  
Walter C. Oechel
Keyword(s):  
Carbon Budget ◽  
Arctic Tundra ◽  
Heterogeneous Landscapes ◽  
Alaskan Arctic
Sign in / Sign up

Export Citation Format

Share Document