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Climate change and water.

TL;DR: The Intergovernmental Panel on Climate Change (IPCC) Technical Paper Climate Change and Water draws together and evaluates the information in IPCC Assessment and Special Reports concerning the impacts of climate change on hydrological processes and regimes, and on freshwater resources.
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The evidence for shrub expansion in Northern Alaska and the Pan‐Arctic

TL;DR: Using 202 pairs of old and new oblique aerial photographs, this article found that across this region spanning 620 km east to west and 350 km north to south, alder, willow and dwarf birch have been increasing, with the change most easily detected on hill slopes and valley bottoms.
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Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities

TL;DR: This article used repeat photography, long-term ecological monitoring and dendrochronology to document shrub expansion in arctic, high-latitude and alpine tundra.
References
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Increased plant growth in the northern high latitudes from 1981 to 1991

TL;DR: In this paper, the authors present evidence from satellite data that the photosynthetic activity of terrestrial vegetation increased from 1981 to 1991 in a manner that is suggestive of an increase in plant growth associated with a lengthening of the active growing season.
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Characteristics of maximum-value composite images from temporal AVHRR data

TL;DR: In this paper, satellite data from the Advanced Very High Resolution Radiometer sensor have been processed over several days and combined to produce spatially continuous cloud-free imagery over large areas with sufficient temporal resolution to study green-vegetation dynamics.
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Observational evidence of recent change in the northern high-latitude environment

TL;DR: In this paper, the authors present asynthesis of these observations, and conclude that roughly half of the pronounced recent rise in Northern Hemispherewinter temperatures reflects shifts in atmosphericcirculation. But, such changes are not consistent with anthropogenic forcing and include generally positive phases of the North Atlantic and ArcticOscillations and extratropical responses to the El-NinoSouthern Oscillation.
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Variations in northern vegetation activity inferred from satellite data of vegetation index during 1981 to 1999

TL;DR: In this paper, the authors present results from analyses of a recently developed satellite-sensed normalized difference vegetation index (NDVI) data set for the period July 1981 to December 1999, showing that about 61% of the total vegetated area between 40°N and 70°N in Eurasia shows a persistent increase in growing season NDVI over a broad contiguous swath of land from central Europe through Siberia to the Aldan plateau, where almost 58% (7.3×106 km2) is forests and woodlands.
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