Assessing for Spatio-temporal Phenological Changes in Western European Deciduous Forests PDF Download
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Author: E. Hamunyela
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Plant phenology is changing because of global warming, and this change may precipitate changes in animal distribution (e.g. pests), alter the synchronization between species, and have feedback effects on the climate system through the alteration of biogeochemical and physical processes of vegetated land surface. Despite these possible alarming consequences resulting from changes in plant phenology, we do not have a certain global picture of where change in plant phenology is occurring. Satellite data are seen as possible source of wall-to-wall information on plant phenology, but the reliability of this information for monitoring changes in plant phenology is not well established. Here, we used both ground phenological observations and satellite-derived metrics covering the period of 2001 through 2011 to assess for trends in the start-of-season (SOS) for Western European deciduous forests to determine if climatic warming recorded between 2001 and 2011 has resulted into changes in SOS.
Author: E. Hamunyela
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Book Description
Plant phenology is changing because of global warming, and this change may precipitate changes in animal distribution (e.g. pests), alter the synchronization between species, and have feedback effects on the climate system through the alteration of biogeochemical and physical processes of vegetated land surface. Despite these possible alarming consequences resulting from changes in plant phenology, we do not have a certain global picture of where change in plant phenology is occurring. Satellite data are seen as possible source of wall-to-wall information on plant phenology, but the reliability of this information for monitoring changes in plant phenology is not well established. Here, we used both ground phenological observations and satellite-derived metrics covering the period of 2001 through 2011 to assess for trends in the start-of-season (SOS) for Western European deciduous forests to determine if climatic warming recorded between 2001 and 2011 has resulted into changes in SOS.
Author: Urša Vilhar
Publisher: Elsevier Inc. Chapters
ISBN: 0128055227
Category : Nature
Languages : en
Pages : 24
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Book Description
The chapter describes methodologies for harmonized phenological assessments based on a limited set of development phases: flushing, flowering, secondary flushing, color change, and leaf/needle fall. Manual phenological observations are based on a brief examination in the forest stands. More recently, the use of terrestrial digital image photography for forest phenology monitoring has been adopted. Vegetation indices, such as the normalized difference vegetation index (NDVI) have been used for many years to quantify the phenology of different ecosystems. For satellite-based remote sensing of vegetation phenology, phenological metrics are derived from time series of optical data and represent the only possible assessment of phenology over large and inaccessible regions. All indirect methods using optical vegetation indices from digital camera or NDVI sensors need to be validated against ground observations, for which manual tree phenological observations from the forest monitoring plots are often used. Examples from phenological monitoring in Slovenia, France, United Kingdom, and Finland are presented.
Author: Yingying Xie
Publisher:
ISBN:
Category :
Languages : en
Pages : 274
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Book Description
Author: Asko Noormets
Publisher: Springer Science & Business Media
ISBN: 1441900268
Category : Science
Languages : en
Pages : 281
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Book Description
Terrestrial carbon balance is uncertain at the regional and global scale. A significant source of variability in mid-latitude ecosystems is related to the timing and duration of phenological phases. Spring phenology, in particular, has disproportionate effects on the annual carbon balance. However, the traditional phenological indices that are based on leaf-out and flowering times of select indicator species are not universally amenable for predicting the temporal dynamics of ecosystem carbon and water exchange. Phenology of Ecosystem Processes evaluates current applications of traditional phenology in carbon and H2O cycle research, as well as the potential to identify phenological signals in ecosystem processes themselves. The book summarizes recent progress in the understanding of the seasonal dynamics of ecosystem carbon and H2O fluxes, the novel use of various methods (stable isotopes, time-series, forward and inverse modeling), and the implications for remote sensing and global carbon cycle modeling. Each chapter includes a literature review, in order to present the state-of-the-science in the field and enhance the book’s usability as an educational aid, as well as a case study to exemplify the use and applicability of various methods. Chapters that apply a specific methodology summarize the successes and challenges of particular methods for quantifying the seasonal changes in ecosystem carbon, water and energy fluxes. The book will benefit global change researchers, modelers, and advanced students.
Author: George P. Petropoulos
Publisher: Elsevier
ISBN: 0128030313
Category : Science
Languages : en
Pages : 448
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Book Description
Sensitivity Analysis in Earth Observation Modeling highlights the state-of-the-art in ongoing research investigations and new applications of sensitivity analysis in earth observation modeling. In this framework, original works concerned with the development or exploitation of diverse methods applied to different types of earth observation data or earth observation-based modeling approaches are included. An overview of sensitivity analysis methods and principles is provided first, followed by examples of applications and case studies of different sensitivity/uncertainty analysis implementation methods, covering the full spectrum of sensitivity analysis techniques, including operational products. Finally, the book outlines challenges and future prospects for implementation in earth observation modeling. Information provided in this book is of practical value to readers looking to understand the principles of sensitivity analysis in earth observation modeling, the level of scientific maturity in the field, and where the main limitations or challenges are in terms of improving our ability to implement such approaches in a wide range of applications. Readers will also be informed on the implementation of sensitivity/uncertainty analysis on operational products available at present, on global and continental scales. All of this information is vital in the selection process of the most appropriate sensitivity analysis method to implement. Outlines challenges and future prospects of sensitivity analysis implementation in earth observation modeling Provides readers with a roadmap for directing future efforts Includes case studies with applications from different regions around the globe, helping readers to explore strengths and weaknesses of the different methods in earth observation modeling Presents a step-by-step guide, providing the principles of each method followed by the application of variants, making the reference easy to use and follow
Author: K.W. Hipel
Publisher: Elsevier
ISBN: 0080870368
Category : Technology & Engineering
Languages : en
Pages : 1053
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Book Description
This is a comprehensive presentation of the theory and practice of time series modelling of environmental systems. A variety of time series models are explained and illustrated, including ARMA (autoregressive-moving average), nonstationary, long memory, three families of seasonal, multiple input-single output, intervention and multivariate ARMA models. Other topics in environmetrics covered in this book include time series analysis in decision making, estimating missing observations, simulation, the Hurst phenomenon, forecasting experiments and causality. Professionals working in fields overlapping with environmetrics - such as water resources engineers, environmental scientists, hydrologists, geophysicists, geographers, earth scientists and planners - will find this book a valuable resource. Equally, environmetrics, systems scientists, economists, mechanical engineers, chemical engineers, and management scientists will find the time series methods presented in this book useful.
Author: Irene L. Hudson
Publisher: Springer Science & Business Media
ISBN: 9048133351
Category : Science
Languages : en
Pages : 525
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Book Description
As climate change continues to dominate the international environmental agenda, phenology – the study of the timing of recurring biological events – has received increasing research attention, leading to an emerging consensus that phenology can be viewed as an ‘early warning system’ for climate change impact. A multidisciplinary science involving many branches of ecology, geography and remote sensing, phenology to date has lacked a coherent methodological text. This new synthesis, including contributions from many of the world’s leading phenologists, therefore fills a critical gap in the current biological literature. Providing critiques of current methods, as well as detailing novel and emerging methodologies, the book, with its extensive suite of references, provides readers with an understanding of both the theoretical basis and the potential applications required to adopt and adapt new analytical and design methods. An invaluable source book for researchers and students in ecology and climate change science, the book also provides a useful reference for practitioners in a range of sectors, including human health, fisheries, forestry, agriculture and natural resource management.
Author: Andrew Delmar Hopkins
Publisher:
ISBN:
Category : Bioclimatology
Languages : en
Pages : 208
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Book Description
Author: Robert Weigel
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Koen Kramer
Publisher:
ISBN: 9789054854647
Category : Climatic changes
Languages : en
Pages : 210
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Book Description
Bäume, Europa, Phänologie von Pflanzeneigenschaften.
