Suchergebnisse - "Epstein, Howard E"

Tall shrub and tree expansion in Siberian tundra ecotones since the 1960s von Frost, Gerald V, Epstein, Howard E

“… Circumpolar expansion of tall shrubs and trees into Arctic tundra is widely thought to be occurring as a result of recent climate warming, but little …”
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Elevation and Climate Effects on Vegetation Greenness in an Arid Mountain-Basin System of Central Asia von Tai, Xiaoli, Epstein, Howard E., Li, Bo

“… Mountain-basin systems (MBS) in Central Asia are unique and complex ecosystems, wherein their elevation gradients lead to high spatial heterogeneity in …”
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Reviews and syntheses: Changing ecosystem influences on soil thermal regimes in northern high-latitude permafrost regions von Loranty, Michael M., Abbott, Benjamin W., Blok, Daan, Douglas, Thomas A., Epstein, Howard E., Forbes, Bruce C., Jones, Benjamin M., Kholodov, Alexander L., Kropp, Heather, Malhotra, Avni, Mamet, Steven D., Myers-Smith, Isla H., Natali, Susan M., O'Donnell, Jonathan A., Phoenix, Gareth K., Rocha, Adrian V., Sonnentag, Oliver, Tape, Ken D., Walker, Donald A.

“… Soils in Arctic and boreal ecosystems store twice as much carbon as the atmosphere, a portion of which may be released as high-latitude soils warm. Some of the …”
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Shrub expansion in tundra ecosystems: dynamics, impacts and research priorities von Myers-Smith, Isla H, Forbes, Bruce C, Wilmking, Martin, Hallinger, Martin, Lantz, Trevor, Blok, Daan, Tape, Ken D, Macias-Fauria, Marc, Sass-Klaassen, Ute, Lévesque, Esther, Boudreau, Stéphane, Ropars, Pascale, Hermanutz, Luise, Trant, Andrew, Collier, Laura Siegwart, Weijers, Stef, Rozema, Jelte, Rayback, Shelly A, Schmidt, Niels Martin, Schaepman-Strub, Gabriela, Wipf, Sonja, Rixen, Christian, Ménard, Cécile B, Venn, Susanna, Goetz, Scott, Andreu-Hayles, Laia, Elmendorf, Sarah, Ravolainen, Virve, Welker, Jeffrey, Grogan, Paul, Epstein, Howard E, Hik, David S

“… Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and …”
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Dynamics of aboveground phytomass of the circumpolar Arctic tundra during the past three decades von Epstein, Howard E, Raynolds, Martha K, Walker, Donald A, Bhatt, Uma S, Tucker, Compton J, Pinzon, Jorge E

“… Numerous studies have evaluated the dynamics of Arctic tundra vegetation throughout the past few decades, using remotely sensed proxies of vegetation, such as …”
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Disequilibrium of fire-prone forests sets the stage for a rapid decline in conifer dominance during the 21st century von Serra-Diaz, Josep M., Maxwell, Charles, Lucash, Melissa S., Scheller, Robert M., Laflower, Danelle M., Miller, Adam D., Tepley, Alan J., Epstein, Howard E., Anderson-Teixeira, Kristina J., Thompson, Jonathan R.

“… The impacts of climatic changes on forests may appear gradually on time scales of years to centuries due to the long generation times of trees. Consequently, …”
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Transferability of the Deep Learning Mask R-CNN Model for Automated Mapping of Ice-Wedge Polygons in High-Resolution Satellite and UAV Images von Zhang, Weixing, Liljedahl, Anna K., Kanevskiy, Mikhail, Epstein, Howard E., Jones, Benjamin M., Jorgenson, M. Torre, Kent, Kelcy

“… State-of-the-art deep learning technology has been successfully applied to relatively small selected areas of very high spatial resolution (0.15 and 0.25 m) …”
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Changing seasonality of panarctic tundra vegetation in relationship to climatic variables von Bhatt, Uma S, Walker, Donald A, Raynolds, Martha K, Bieniek, Peter A, Epstein, Howard E, Comiso, Josefino C, Pinzon, Jorge E, Tucker, Compton J, Steele, Michael, Ermold, Wendy, Zhang, Jinlun

“… Potential climate drivers of Arctic tundra vegetation productivity are investigated to understand recent greening and browning trends documented by maximum …”
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Regional and landscape-scale variability of Landsat-observed vegetation dynamics in northwest Siberian tundra von Frost, Gerald V, Epstein, Howard E, Walker, Donald A

“… Widespread increases in Arctic tundra productivity have been documented for decades using coarse-scale satellite observations, but finer-scale observations …”
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Circumpolar Arctic Tundra Vegetation Change Is Linked to Sea Ice Decline von Bhatt, Uma S., Walker, Donald A., Raynolds, Martha K., Comiso, Josefino C., Epstein, Howard E., Jia, Gensuo, Gens, Rudiger, Pinzon, Jorge E., Tucker, Compton J., Tweedie, Craig E., Webber, Patrick J.

“… Linkages between diminishing Arctic sea ice and changes in Arctic terrestrial ecosystems have not been previously demonstrated. Here, the authors use a newly …”
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Climate drivers of Arctic tundra variability and change using an indicators framework von Bhatt, Uma S, Walker, Donald A, Raynolds, Martha K, Walsh, John E, Bieniek, Peter A, Cai, Lei, Comiso, Josefino C, Epstein, Howard E, Frost, Gerald V, Gersten, Robert, Hendricks, Amy S, Pinzon, Jorge E, Stock, Larry, Tucker, Compton J

“… This study applies an indicators framework to investigate climate drivers of tundra vegetation trends and variability over the 1982–2019 period. Previously …”
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Recent dynamics of arctic and sub-arctic vegetation von Epstein, Howard E, Myers-Smith, Isla, Walker, Donald A

“… We present a focus issue of Environmental Research Letters on the 'Recent dynamics of arctic and sub-arctic vegetation'. The focus issue includes three …”
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Debating the greening vs. browning of the North American boreal forest: differences between satellite datasets von ALCARAZ-SEGURA, DOMINGO, CHUVIECO, EMILIO, EPSTEIN, HOWARD E, KASISCHKE, ERIC S, TRISHCHENKO, ALEXANDER

“… A number of remote sensing studies have evaluated the temporal trends of the normalized difference vegetation index (NDVI or vegetation greenness) in the North …”
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Patterned-ground facilitates shrub expansion in Low Arctic tundra von Frost, Gerald V, Epstein, Howard E, Walker, Donald A, Matyshak, Georgiy, Ermokhina, Ksenia

“… Recent expansion of tall shrubs in Low Arctic tundra is widely seen as a response to climate warming, but shrubification is not occurring as a simple function …”
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Recent Declines in Warming and Vegetation Greening Trends over Pan-Arctic Tundra von Bhatt, Uma, Walker, Donald, Raynolds, Martha, Bieniek, Peter, Epstein, Howard, Comiso, Josefino, Pinzon, Jorge, Tucker, Compton, Polyakov, Igor

“… Vegetation productivity trends for the Arctic tundra are updated for the 1982–2011 period and examined in the context of land surface temperatures and coastal …”
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An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery von Witharana, Chandi, Bhuiyan, Md Abul Ehsan, Liljedahl, Anna K., Kanevskiy, Mikhail, Jorgenson, Torre, Jones, Benjamin M., Daanen, Ronald, Epstein, Howard E., Griffin, Claire G., Kent, Kelcy, Ward Jones, Melissa K.

“… Very high spatial resolution commercial satellite imagery can inform observation, mapping, and documentation of micro-topographic transitions across large …”
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Effects of enhanced wind erosion on surface soil texture and characteristics of windblown sediments von Li, Junran, Okin, Gregory S., Epstein, Howard E.

“… It is well documented that wind redistributes and transports soil resources in semiarid ecosystems. However, fewer studies have quantitatively linked wind …”
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Land cover and land use changes in the oil and gas regions of Northwestern Siberia under changing climatic conditions von Yu, Qin, Epstein, Howard E, Engstrom, Ryan, Shiklomanov, Nikolay, Strelestskiy, Dmitry

“… Northwestern Siberia has been undergoing a range of land cover and land use changes associated with climate change, animal husbandry and development of mineral …”
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Influences of Satellite Sensor and Scale on Derivation of Ecosystem Functional Types and Diversity von Liu, Lingling, Smith, Jeffrey R., Armstrong, Amanda H., Alcaraz-Segura, Domingo, Epstein, Howard E., Echeverri, Alejandra, Langhans, Kelley E., Schmitt, Rafael J. P., Chaplin-Kramer, Rebecca

“… Satellite-derived Ecosystem Functional Types (EFTs) are increasingly used in ecology and conservation to characterize ecosystem heterogeneity. The diversity of …”
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Plant Functional Diversity Can Be Independent of Species Diversity: Observations Based on the Impact of 4-Yrs of Nitrogen and Phosphorus Additions in an Alpine Meadow von Li, Wei, Cheng, Ji-Min, Yu, Kai-Liang, Epstein, Howard E., Guo, Liang, Jing, Guang-Hua, Zhao, Jie, Du, Guo-Zhen

“… Past studies have widely documented the decrease in species diversity in response to addition of nutrients, however functional diversity is often independent …”
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