Arctic tundra shrub invasion and soot deposition: Consequences for spring snowmelt and near-surface air temperatures
نویسندگان
چکیده
منابع مشابه
Bird Communities of the Arctic Shrub Tundra of Yamal: Habitat Specialists and Generalists
BACKGROUND The ratio of habitat generalists to specialists in birds has been suggested as a good indicator of ecosystem changes due to e.g. climate change and other anthropogenic perturbations. Most studies focusing on this functional component of biodiversity originate, however, from temperate regions. The Eurasian Arctic tundra is currently experiencing an unprecedented combination of climate...
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Understanding feedbacks between terrestrial and atmospheric systems is vital for predicting the consequences of global change, particularly in the rapidly changing Arctic. Fire is a key process in this context, but the consequences of altered fire regimes in tundra ecosystems are rarely considered, largely because tundra fires occur infrequently on the modern landscape. We present paleoecologic...
متن کاملTerrestrial Remote Sensing of Snowmelt in a Diverse High-Arctic Tundra Environment Using Time-Lapse Imagery
Snow cover is one of the crucial factors influencing the plant distribution in harsh Arctic regions. In tundra environments, wind redistribution of snow leads to a very heterogeneous spatial distribution which influences growth conditions for plants. Therefore, relationships between snow cover and vegetation should be analyzed spatially. In this study, we correlate spatial data sets on tundra v...
متن کاملShrub canopies influence soil temperatures but not nutrient dynamics: An experimental test of tundra snow–shrub interactions
Shrubs are the largest plant life form in tundra ecosystems; therefore, any changes in the abundance of shrubs will feedback to influence biodiversity, ecosystem function, and climate. The snow-shrub hypothesis asserts that shrub canopies trap snow and insulate soils in winter, increasing the rates of nutrient cycling to create a positive feedback to shrub expansion. However, previous work has ...
متن کاملTwentieth century bipolar seesaw of the Arctic and Antarctic surface air temperatures
[1] Understanding the phase relationship between climate changes in the Arctic and Antarctic regions is essential for our understanding of the dynamics of the Earth’s climate system. In this paper we show that the 20th century de‐ trended Arctic and Antarctic temperatures vary in anti‐phase seesaw pattern – when the Arctic warms the Antarctica cools and visa versa. This is the first time that a...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Biogeosciences
سال: 2007
ISSN: 0148-0227
DOI: 10.1029/2006jg000297