Responses of High Latitude Ecosystems to Global Change: Potential Consequences for the Climate System

McGuire, A. D.; Wirth, Christian; Apps, Mike; Bhatti, Jagtar S.; Callaghan, Terry V.; Christensen, Torben R.; Clein, Joy S.; Fukuda, Masami; Maximov, Trofim C.; Онучин, А. А.; Shvidenko, А.; Vaganov, Еugene А.

doi:10.1007/978-3-540-32730-1_24

Cited by 34 publications

(28 citation statements)

References 135 publications

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“…The exchange of water, energy and carbon between the surface and the atmosphere is determined by biogeophysical properties of the surface such as hydrology or albedo, as well as biogeochemical properties such as biomass, and vegetation type (Bonan et al, 1995;Chapin et al, 2005;McGuire et al, 2007). In both regional and global land surface and climate models, the biogeophysical parameters are estimated on the basis of land cover classifications.…”

Section: Introductionmentioning

confidence: 99%

Subpixel heterogeneity of ice-wedge polygonal tundra: a multi-scale analysis of land cover and evapotranspiration in the Lena River Delta, Siberia

Muster¹,

Langer²,

Heim

et al. 2012

Tellus B: Chemical and Physical Meteorology

128

174

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A B S T R A C TIgnoring small-scale heterogeneities in Arctic land cover may bias estimates of water, heat and carbon fluxes in large-scale climate and ecosystem models. We investigated subpixel-scale heterogeneity in CHRIS/PROBA and Landsat-7 ETM' satellite imagery over ice-wedge polygonal tundra in the Lena Delta of Siberia, and the associated implications for evapotranspiration (ET) estimation. Field measurements were combined with aerial and satellite data to link fine-scale (0.3 m resolution) with coarse-scale (up to 30 m resolution) land cover data. A large portion of the total wet tundra (80%) and water body area (30%) appeared in the form of patches less than 0.1 ha in size, which could not be resolved with satellite data. Wet tundra and small water bodies represented about half of the total ET in summer. Their contribution was reduced to 20% in fall, during which ET rates from dry tundra were highest instead. Inclusion of subpixel-scale water bodies increased the total water surface area of the Lena Delta from 13% to 20%. The actual land/water proportions within each composite satellite pixel was best captured with Landsat data using a statistical downscaling approach, which is recommended for reliable large-scale modelling of water, heat and carbon exchange from permafrost landscapes.

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Section: Introductionmentioning

confidence: 99%

Subpixel heterogeneity of ice-wedge polygonal tundra: a multi-scale analysis of land cover and evapotranspiration in the Lena River Delta, Siberia

Muster¹,

Langer²,

Heim

et al. 2012

Tellus B: Chemical and Physical Meteorology

128

174

View full text Add to dashboard Cite

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“…Although the proportion of burned area was small (e.g., ~4 % for the Lena watershed), the actual area covered was large with a 25 year fire return interval. Increased fire frequency and intensity have been observed in the second half of the 20th Century in Canada, Alaska and northern Eurasia (McGuire et al 2004(McGuire et al , 2007. Wildfires can destroy the insulating organic surface layer and warm the soil, increasing the rates of permafrost thaw and the active layer thickness Johnstone et al 2010).…”

Section: Carbon Mobilizationmentioning

confidence: 99%

“…Wildfires can destroy the insulating organic surface layer and warm the soil, increasing the rates of permafrost thaw and the active layer thickness Johnstone et al 2010). With subsequent regrowth of mosses the soils cool again, but with a warmer and drier climate, increased fire frequency and intensity may trigger a positive feedback loop between the loss of SOC and subsequent warming and thawing of permafrost soils (O'Donnell et al 2011;McGuire et al 2007). …”

Section: Carbon Mobilizationmentioning

confidence: 99%

Recarbonization of the Biosphere

Lal¹,

Lorenz

Hüttl³

et al. 2012

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“…With the drive of increasing temperature and aridity of climate, increasing and mostly unregulated anthropogenic impacts, Siberian terrestrial ecosystems are undergoing integral and inherent dynamics as well (McGuire et al, 2006;Shvidenko, 2009;Kurtsev, 2013), which affects the climate itself in turn, and the climate condition of other regions (Vinogradova et al, 2015), China for example. Siberia climate-land system change induced by variation of temperature and precipitation in Eurasian would have immediate impact on agriculture and ecology of China, especially for the northeast region, the greatest commodity grain base in China adjacent to Siberia.…”

Section: Introductionmentioning

confidence: 99%

High resolution land cover datasets integration and application based on Landsat and Globcover data from 1975 to 2010 in Siberia

Liu

Zhang

et al. 2016

Chin. Geogr. Sci.

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Land cover is recognized as one of the fundamental terrestrial datasets required in land system change and other ecosystem related researches across the globe. The regional differentiation and spatial-temporal variation of land cover has significant impact on regional natural environment and socio-economic sustainable development. Under this context, we reconstructed the history land cover data in Siberia to provide a comparable datasets to the land cover datasets in China and abroad. In this paper, the European Space Agency (ESA) Global Land Cover Map (GlobCover), Landsat Thematic Mapper (TM), Enhanced Thematic Mapper (ETM), Multispectral Scanner (MSS) images, Google Earth images and other additional data were used to produce the land cover datasets in 1975 and 2010 in Siberia. Data evaluation show that the total user′s accuracy of land cover data in 2010 was 86.96%, which was higher than ESA GlobCover data in Siberia. The analysis on the land cover changes found that there were no big land cover changes in Siberia from 1975 to 2010 with only a few conversions between different natural forest types. The mainly changes are the conversion from deciduous needleleaf forest to deciduous broadleaf forest, deciduous needleleaf forest to mixed forest, savannas to deciduous needleleaf forest etc., indicating that the dominant driving factor of land cover changes in Siberia was natural element rather than human activities at some extent, which was very different from China. However, our purpose was not just to produce the land cover datasets at two time period or explore the driving factors of land cover changes in Siberia, we also paid attention on the significance and application of the datasets in various fields such as global climate change, geopolitics, cross-border cooperation and so on. Keywords: land cover change; Landsat; data integration; data application; Siberia Citation: Liu Tingxiang, Zhang Shuwen, Xu Xinliang, Bu Kun, Ning Jia, Chang Liping, 2016. High resolution land cover datasets integration and application based on Landsat and GlobCover data from 1975

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Responses of High Latitude Ecosystems to Global Change: Potential Consequences for the Climate System

Cited by 34 publications

References 135 publications

Subpixel heterogeneity of ice-wedge polygonal tundra: a multi-scale analysis of land cover and evapotranspiration in the Lena River Delta, Siberia

Subpixel heterogeneity of ice-wedge polygonal tundra: a multi-scale analysis of land cover and evapotranspiration in the Lena River Delta, Siberia

Recarbonization of the Biosphere

High resolution land cover datasets integration and application based on Landsat and Globcover data from 1975 to 2010 in Siberia

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