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Selection: Zhang:Z [10 articles] 

Publications by author Zhang:Z.
 

Global models underestimate large decadal declining and rising water storage trends relative to GRACE satellite data

  
Proceedings of the National Academy of Sciences (22 January 2018), 201704665, https://doi.org/10.1073/pnas.1704665115

Abstract

[Significance] We increasingly rely on global models to project impacts of humans and climate on water resources. How reliable are these models? While past model intercomparison projects focused on water fluxes, we provide here the first comprehensive comparison of land total water storage trends from seven global models to trends from Gravity Recovery and Climate Experiment (GRACE) satellites, which have been likened to giant weighing scales in the sky. The models underestimate the large decadal (2002–2014) trends in water storage relative to ...

 

Emerging role of wetland methane emissions in driving 21st century climate change

  
Proceedings of the National Academy of Sciences, Vol. 114, No. 36. (05 September 2017), pp. 9647-9652, https://doi.org/10.1073/pnas.1618765114

Abstract

[Significance] Conventional greenhouse gas mitigation policies ignore the role of global wetlands in emitting methane (CH4) from feedbacks associated with changing climate. Here we investigate wetland feedbacks and whether, and to what degree, wetlands will exceed anthropogenic 21st century CH4 emissions using an ensemble of climate projections and a biogeochemical methane model with dynamic wetland area and permafrost. Our results reveal an emerging contribution of global wetland CH4 emissions due to processes mainly related to the sensitivity of methane emissions to temperature ...

 

The global methane budget 2000–2012

  
Earth System Science Data, Vol. 8, No. 2. (12 December 2016), pp. 697-751, https://doi.org/10.5194/essd-8-697-2016

Abstract

The global methane (CH4) budget is becoming an increasingly important component for managing realistic pathways to mitigate climate change. This relevance, due to a shorter atmospheric lifetime and a stronger warming potential than carbon dioxide, is challenged by the still unexplained changes of atmospheric CH4 over the past decade. Emissions and concentrations of CH4 are continuing to increase, making CH4 the second most important human-induced greenhouse gas after carbon dioxide. Two major difficulties in reducing uncertainties come from the large variety ...

 

Populus yunnanensis

  
In Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie (2005)

Abstract

Populus yunnanensis ist eine raschwüchsige Balsampappel, die überwiegend östlich und südöstlich an das Tibetische Hochland anschließende, subtropisch beeinflusste Gebirgsregionen in Südwestchina (Yunnan, Sichuan, Guizhou) besiedelt. Auf zusagenden Standorten werden häufig schon im Alter von 25 Jahren Baumhöhen von etwa 30 m und Durchmesser (BHD) über 60 cm erreicht. Auffällige Kennzeichen sind der gerade Stamm und die verhältnismäßig schlanke Krone mit vorwiegend aufwärts gerichteter Aststellung. Die Knospen scheiden ein harzigklebriges, nach Balsam riechendes Sekret aus. Günstige Voraussetzungen für das Wachstum bestehen insbesondere ...

 

Populus lasiocarpa

  
In Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie (2008)

Abstract

Populus lasiocarpa ist eine hauptsächlich in den subtropisch beeinflussten Gebirgsregionen Südwestchinas endemisch vorkommende, sommergrüne Baumart. Sie ist, abweichend von anderen Pappelarten, überwiegend einhäusig, beeindruckt durch ihre großblättrige Belaubung mit mehr oder weniger auffällig rot gefärbten Blattstielen und wird deshalb in vielen Ländern als Ziergehölz kultiviert. Bei ähnlichem Wuchsrhythmus ist das Wuchspotential gleichwohl erheblich geringer als bei anderen, als leistungsstark bekannten Pappelarten. Die Baumhöhen reichen im Allgemeinen nicht über 20 m, die Durchmesser (BHD) nicht über 60 cm hinaus. Die Großblatt-Pappel besiedelt ...

 

Populus cathayana

  
In Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie (2005)

Abstract

Die Balsampappel Populus cathayana verfügt über ein geschlossenes natürliches Areal, das sich hauptsächlich über weite Gebiete Nord-, Zentral- und Südwestchinas erstreckt. Vorzugsweise werden Fluss- und Bachablagerungen sowie an Unterhängen oder in Senken sedimentierte Substrate besiedelt. Dort sind Wuchshöhen um 30 m und Durchmesser (BHD) bis etwa 80 cm möglich. Die Kathai- Pappel ist ein lichtbedürftiger Pionierbaum, dessen Konkurrenzverhalten auf zusagenden Standorten durch schnelle, weiträumige Ausbreitung und rasches Jugendwachstum bestimmt wird. Die Verjüngung erfolgt in den Flussniederungen meist generativ, doch ist, häufig ...

 

Populus adenopoda

  
In Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie (2011)

Abstract

Populus adenopoda ist eine vorwiegend in Gebirgsregionen Chinas mit subtropischem bis gemäßigtem Klimaeinfluss weit verbreitete Aspenart. Im Erscheinungsbild ähnelt sie ihren eurasischen und nordamerikanischen Verwandten P. tremula und P. tremuloides. Die meist schlankwüchsigen, wipfelschäftigen, mit relativ schmaler Krone ausgestatteten Bäume können bei günstigen Standortsbedingungen Wuchshöhen von 30 m und Durchmesser (BHD) von 80 cm erreichen. Charakteristische Merkmale weisen die Chinesische Aspe als lichtbedürftige, konkurrenzschwache Pionierart aus: Der Wuchsrhythmus wird durch rasches Jugend- und mäßiges Alterswachstum bestimmt. Die Lebensdauer ist verhältnismäßig kurz; ...

 

Estimation of the USLE cover and management factor C using satellite remote sensing: A review

  
In Geoinformatics, 2011 19th International Conference on (June 2011), pp. 1-5, https://doi.org/10.1109/geoinformatics.2011.5980735
Keywords: c-factor   remote-sensing   review   usle  

Abstract

Soil erosion has been one of the worldwide environmental disasters which severely threaten the sustainable development of socio-economic, natural resources, and the environment. The Universal Soil Loss Equation (USLE) is the most widely used model to quantify soil erosion. The cover and management factor C is perhaps the most important USLE factor because it represents conditions that can most easily be managed to reduce erosion. Satellite remote sensing can contribute through providing spatial data to assessment of C factor. Thus, many ...

 

Biodiversity data should be published, cited, and peer reviewed

  
Trends in Ecology & Evolution, Vol. 28, No. 8. (August 2013), pp. 454-461, https://doi.org/10.1016/j.tree.2013.05.002

Abstract

Knowledge depends on data and thus data quality. Data publication needs quality assurance standards like conventional publications. Peer review is the highest standard in scientific publications. Indicators for biodiversity data quality, including peer review, are proposed. Concerns over data quality impede the use of public biodiversity databases and subsequent benefits to society. Data publication could follow the well-established publication process: with automated quality checks, peer review, and editorial decisions. This would improve data accuracy, reduce the need for users to ‘clean’ ...

 

A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests

  
Forest Ecology and Management, Vol. 259, No. 4. (05 February 2010), pp. 660-684, https://doi.org/10.1016/j.foreco.2009.09.001

Abstract

Greenhouse gas emissions have significantly altered global climate, and will continue to do so in the future. Increases in the frequency, duration, and/or severity of drought and heat stress associated with climate change could fundamentally alter the composition, structure, and biogeography of forests in many regions. Of particular concern are potential increases in tree mortality associated with climate-induced physiological stress and interactions with other climate-mediated processes such as insect outbreaks and wildfire. Despite this risk, existing projections of tree mortality are ...

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Integrated Natural Resources Modelling and Management - Meta-information Database. http://mfkp.org/INRMM/author/Zhang:Z

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