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Slideshow of Tundra

Slideshow of Tundra

This slideshow tells you what the tundra looks like… pretty cooooooooooooooooool…….. We are modeling the post-fire biomass, carbon cycling recovery along a burning severity gradient. The data we used is eddy flux tower measurement from 2008 – 2012, right after the 2007 Anaktuvuk River Fire which is the large recorded tundra fire (> 1,000 km2) … Continue reading

Modeling thermal dynamics of active layer soils and near-surface permafrost

Modeling thermal dynamics of active layer soils and near-surface permafrost

Jiang, Y., Q. Zhuang, and J. A. O’Donnell (2012), Modeling thermal dynamics of active layer soils and near-surface permafrost using a fully coupled water and heat transport model, J. Geophys. Res., 117, D11110, doi:10.1029/2012JD017512. Thawing and freezing processes are key components in permafrost dynamics, and these processes play an important role in regulating the hydrological and carbon … Continue reading

Uncertainty analysis of vegetation distribution

Uncertainty analysis of vegetation distribution

Jiang, Y., Q. Zhuang, S. Schaphoff, S. Sitch, A. Sokolov, D. Kicklighter, and J. Melillo (2012), Uncertainty analysis of vegetation distribution in the northern high latitudes during the 21st century with a dynamic vegetation model, Ecol. Evol., 2(3), 593–614, doi:10.1002/ece3.85. This study aims to assess how high-latitude vegetation may respond under various climate scenarios during the 21st century … Continue reading

Modeling Large Fire Frequency and Burned Area in Canadian Terrestrial Ecosystems with Poisson Models

Modeling Large Fire Frequency and Burned Area in Canadian Terrestrial Ecosystems with Poisson Models

This study quantitatively related fire frequency and burned size to climate variables (i.e. air  temperature and precipitation) and elevation.Jiang et al.  (2012) Modeling Large Fire Frequency and Burned Area in Canadian Terrestrial Ecosystems with Poisson Models, Environmental Modeling & Assessment, 17, 483-493, doi: 10.1007/s10666-012-9307-5. Large wildland fires are major disturbances that strongly influence the carbon cycling and vegetation dynamics of Canadian … Continue reading

Extreme value analysis of wildfires in Canadian boreal forest ecosystems

Extreme value analysis of wildfires in Canadian boreal forest ecosystems

Jiang Y. and Q. Zhuang, Extreme value analysis of wildfires in Canadian boreal forest ecosystems, Canadian Journal of Forest Research, 2011, 41:1836-1851, 10.1139/x11-102. Large fires are a major disturbance in Canadian forests and exert significant effects on both the climate system and ecosystems. During the last century, extremely large fires accounted for the majority of Canadian burned … Continue reading

Characterization of wildfire regimes in Canadian boreal terrestrial ecosystems

Characterization of wildfire regimes in Canadian boreal terrestrial ecosystems

The advantage of this paper is that it quantitatively modeled the relationship between fire frequency and burned area. It could be directly used for predicting fire return intervals with different fire size. The most important parameter in the power-law relationship could be replaced by a function of climate variables (e.g., air temperature, precipitation, soil moisture), … Continue reading