Download or read book Lakes in Land Surface Models written by Huidong Liu and published by . This book was released on 2013 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is part of the long-term research towards building a complete surface water representation in the land surface model, in order to quantify the spatial and temporal variations of surface water bodies, especially lakes, and to further understand the role of lakes in the climate system. Changes in lake water storage reflect variations in climate such as changes in precipitation, land surface evaporation, net river discharge, and groundwater storage. However, owing to the lack of a comprehensive surface water observing system, continental-to-global-scale changes in surface water heights and inundation extent remain poorly understood. In the previous study, a Catchment-based Hydrologic And Routing Modeling System (CHARMS) was developed to be run on a catchment-based modeling template, which was modified from the grid-based National Center for Atmospheric Research (NCAR) Community Land Model (CLM). In the CHARMS model, the catchment-based CLM was coupled to a catchment-based river routing model, which simulated the movement of water through river channels and floodplains. However, the lake component was not included in the CHARMS routing system. Moreover, in the CLM model, lakes are considered to have a globally consistent depth of 50m and a constant volume. In this dissertation, a lake model (CHARMS-lake) is implemented in the routing path of CHARMS, with the objective of better representing the surface water system in the land surface model. In Chapter 2 of this dissertation, the CHARMS model is modified. In the previous version of CHARMS model, an explicit representation of lake bodies was missing, with the lakes either ignored from the surface water system or kept constant in storage. In this chapter the routing path for CHARMS is manipulated by adding lakes into the river network. Modeled lake levels for Lake Superior and Lake Victoria are compared with the altimetry data, and the outflow discharge from lake basins is also compared with the model case which assumes no lake in the basin. The performance of NASA's Gravity Recovery and Climate Experiment (GRACE) detecting changes in land water mass is evaluated in Chapter 3, to test its ability of capturing the hydrologic signal from lakes. After removing the hydrologic leakage from the surrounding area, the gridded GRACE TELLUS RL 05 product is scaled over the 16 largest lakes in the world, and compared with the altimetry data for the period of 2003 to 2010. Statistical analysis is performed to find factors that significantly influence the quality of GRACE observations over lakes. Chapter 4 of the dissertation studies the physical properties of lakes, such as thermal expansion, as well as lake bathymetry, in order to better understand their impact on lake level variations. The high resolution bathymetry data for the Great Lakes is integrated and the hypsometric curves for the five lakes are plotted. Thermal expansion of the lakes is estimated using the MODIS surface water temperature data for 6 lakes in two different climate zones. The ratio of thermal expansion to the total amount of lake level change is calculated, indicating that in the tropical regions the impact of thermal expansion can be ignored. This CHARMS-lake model will provide a better understanding of the global hydrologic cycle, and is expected to be coupled to a global scale atmospheric model to study the feedbacks between climate and the terrestrial surface water system.
Download or read book A Spacially Parallel Implementation of Lake and Land Surface Model Interaction with a Regional Climate Model written by and published by . This book was released on with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Spatially Parallel Implementation of a Lake and Land Surface Model Interaction with a Regional Climate Model written by David A. Swayne and published by . This book was released on 2004 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A decade ago, climate change predictions were made by models on coarse spatial resolution where the focus was more on a global scale. Recently, to improve the accuracy, scientists are able to adapt these models to finer spatial scales and to include more detail processes over land and lake surfaces on a regional basis. The objective of this paper is to improve the efficiency of the combined air, land and water components in a regional climate model. This paper shows that for small lakes, which are in the order of millions in Canada, it is possible to treat them as part of the land model module. Furthermore, as each lake acts quite independent of each other, the calculation of a given lake can be carried out simultaneously as the calculation of another lake is being done. If there is a network of computers or a computer with multi-processors deployed for this use, the running time of the regional climate model will be substantially reduced"--Abstract.
Download or read book Data Assimilation for the Earth System written by Richard Swinbank and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data assimilation is the combination of information from observations and models of a particular physical system in order to get the best possible estimate of the state of that system. The technique has wide applications across a range of earth sciences, a major application being the production of operational weather forecasts. Others include oceanography, atmospheric chemistry, climate studies, and hydrology. Data Assimilation for the Earth System is a comprehensive survey of both the theory of data assimilation and its application in a range of earth system sciences. Data assimilation is a key technique in the analysis of remote sensing observations and is thus particularly useful for those analysing the wealth of measurements from recent research satellites. This book is suitable for postgraduate students and those working on the application of data assimilation in meteorology, oceanography and other earth sciences.
Download or read book Digital Models of a Glacial Outwash Aquifer in the Pearl Sallie Lakes Area West central Minnesota written by S. P. Larson and published by . This book was released on 1975 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared in cooperation with the U.S. Environmental Protection Agency.
Download or read book Advancing Earth Surface Representation via Enhanced Use of Earth Observations in Monitoring and Forecasting Applications written by Gianpaolo Balsamo and published by MDPI. This book was released on 2019-08-23 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The representation of the Earth's surface in global monitoring and forecasting applications is moving towards capturing more of the relevant processes, while maintaining elevated computational efficiency and therefore a moderate complexity. These schemes are developed and continuously improved thanks to well instrumented field-sites that can observe coupled processes occurring at the surface–atmosphere interface (e.g., forest, grassland, cropland areas and diverse climate zones). Approaching global kilometer-scale resolutions, in situ observations alone cannot fulfil the modelling needs, and the use of satellite observation becomes essential to guide modelling innovation and to calibrate and validate new parameterization schemes that can support data assimilation applications. In this book, we review some of the recent contributions, highlighting how satellite data are used to inform Earth surface model development (vegetation state and seasonality, soil moisture conditions, surface temperature and turbulent fluxes, land-use change detection, agricultural indicators and irrigation) when moving towards global km-scale resolutions.
Download or read book Land Surface Observation Modeling and Data Assimilation written by Shunlin Liang and published by World Scientific. This book was released on 2013 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is unique in its ambitious and comprehensive coverage of earth system land surface characterization, from observation and modeling to data assimilation, including recent developments in theory and techniques, and novel application cases. The contributing authors are active research scientists, and many of them are internationally known leading experts in their areas, ensuring that the text is authoritative.This book comprises four parts that are logically connected from data, modeling, data assimilation integrating data and models to applications. Land data assimilation is the key focus of the book, which encompasses both theoretical and applied aspects with various novel methodologies and applications to the water cycle, carbon cycle, crop monitoring, and yield estimation.Readers can benefit from a state-of-the-art presentation of the latest tools and their usage for understanding earth system processes. Discussions in the book present and stimulate new challenges and questions facing today''s earth science and modeling communities.
Download or read book Advanced Numerical Modeling and Data Assimilation Techniques for Tropical Cyclone Predictions written by U.C. Mohanty and published by Springer. This book was released on 2016-11-21 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals primarily with monitoring, prediction and understanding of Tropical Cyclones (TCs). It was envisioned to serve as a teaching and reference resource at universities and academic institutions for researchers and post-graduate students. It has been designed to provide a broad outlook on recent advances in observations, assimilation and modeling of TCs with detailed and advanced information on genesis, intensification, movement and storm surge prediction. Specifically, it focuses on (i) state-of-the-art observations for advancing TC research, (ii) advances in numerical weather prediction for TCs, (iii) advanced assimilation and vortex initialization techniques, (iv) ocean coupling, (v) current capabilities to predict TCs, and (vi) advanced research in physical and dynamical processes in TCs. The chapters in the book are authored by leading international experts from academic, research and operational environments. The book is also expected to stimulate critical thinking for cyclone forecasters and researchers, managers, policy makers, and graduate and post-graduate students to carry out future research in the field of TCs.
Download or read book Guide to Process Based Modeling of Lakes and Coastal Seas written by Anders Omstedt and published by Springer. This book was released on 2015-07-21 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of Guide to Process Based Modeling of Lakes and Coastal Seas brings the modeling up to date, taking into account multiple stressors acting on aquatic systems. The combination of acidification and increasing amounts of anoxic waters associated with eutrophication puts severe stress on the marine environment. The detection and attribution of anthropogenic changes in coastal seas are therefore crucial and transparent modeling tools are increasingly important. Modeling the marine CO2–O2 system makes systematic studies on climate change and eutrophication possible and is fundamental for understanding the Earth system. This second edition also includes new sections on detection and attribution and on modeling future changes, as well as improved exercises, updated software, and datasets. This unique book will stimulate students and researchers to develop their modeling skills and make model codes and data transparent to other research groups. It uses the general equation solver PROBE to introduce process-oriented numerical modeling and to build understanding of the subject step by step. The equation solver has been used in many applications, particularly in Sweden and Finland with their numerous lakes, archipelago seas, fjords, and coastal zones. It has also been used for process studies in the Polar Seas and the Mediterranean Sea and the approach is suitable for applications in many other environmental applications. Guide to Process Based Modeling of Lakes and Coastal Seas: • is a unique teaching tool for systematic learning of aquatic modeling; • approaches lake and ocean modeling from a new angle; • introduces aquatic numerical modeling using a process-based approach; • enables the thorough understanding of the physics and biogeochemistry of lakes and coastal seas; • provides software, datasets, and algorithms needed to reproduce all calculations and results in the book; • provides a number of creative and stimulating exercises with solutions; • addresses the interaction between climate change and eutrophication and is a good basis for learning Earth System Sciences.
Download or read book Land Surface Atmosphere Interactions for Climate Modeling written by E.F. Wood and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that the interactions between land surfaces and the atmosphere, and the resulting exchanges in water and energy have a tremendous affect on climate. The inadequate representation of land-atmosphere interactions is a major weakness in current climate models, and is providing the motivation for the HAPEX and ISLSCP experiments as well as the proposed Global Energy and Water Experiment (GEWEX) and the Earth Observing System (EOS) mission. The inadequate representation reflects the recognition that the well-known phys ical relationships, which are well described at small scales, result in different relationships when represented at the scales used in climate models. Understanding this transition in the mathematical relationships with increased space-time scales appears to be very difficult, and has led to different approaches; at one extreme, the famous "bucket" model where the land-surface is a simple one layer storage without vegetation; the other extreme may be Seller's Simple Biosphere Model (Sib) where one big leaf covers the climate model grid. Given the heterogeneous nature of landforms, soils and vegetation within a climate model grid, the development of new land surface parameterizations, and their verification through large scale experiments is perceived to be a challenging area of research for the hydrology and meteorology communities. This book evolved from a workshop held at Princeton University to explore the status of land surface parameterizations within climate models, and how observa tional data can be used to assess these parameterizations and improve models.
Download or read book Microclimate and Local Climate written by Roger G. Barry and published by Cambridge University Press. This book was released on 2016-05-23 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date, comprehensive treatment of microclimate and local climate. It describes and explains the climate within the lower atmosphere and upper soil, the region critical to life on Earth. It is invaluable for advanced students and researchers in climatology, environmental science, geography, meteorology, agricultural science, and forestry.
Download or read book Lake Victoria Monitored from Space written by Joseph Awange and published by Springer Nature. This book was released on 2020-12-17 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book employs a suite of remotely sensed products and advanced technologies to provide the first comprehensive space-based sensing of Lake Victoria, the world’s second largest freshwater lake that supports a livelihood of more than 42 million people, modulates regional climate, but faces myriads of challenges. Proper understanding of the lake and changes in its physical dynamics (e.g., water level, shorelines and areal dynamics) resulting from the impacts of climate variation and climate change as well as anthropogenic (e.g., hydropower and irrigation) is important for its management as well as for strategic development before, during and after climate extremes (e.g., floods and droughts) in order to inform policy formulations, planning and mitigation measures. Owing to its sheer size, and lack of research resources commitment by regional governments that hamper its observations, however, it is a daunting task to undertake studies on Lake Victoria relying solely on in-situ “boots on the ground” measurements, which are sparse, missing in most cases, inconsistent or restricted by governmental red tapes. To unlock the potentials of Lake Victoria, this book argues for the removal of obsolete Nile treaties signed between Britain, Egypt and Sudan in the 1920s and 1950s, which prohibits its utilization by the upstream countries. The book is useful to those in water resources management and policy formulations, hydrologists, environmentalists, engineers and researchers. In a unique cross-disciplinary approach, the Book articulates the various climatic impacts and explanations from natural and anthropogenic origins, which affected Lake Victoria and its vicinity, including the drastic increase and depletion of water level in the Lake and dams, floods and droughts, water quality/security, crop health, food security, and economic implications. With no exception as in his many publications, Joseph L. Awange used data analysis methodologies including filtering, adjustment theory, and robust statistics, to quantify the hydrologic and other parameters, and their estimated uncertainties. The Book is recommended for readers from a diverse disciplines, including physical and social sciences, policy, law, engineering, and disaster management. Professor C.K. Shum, Ohio State University.
Download or read book Climate Change Modeling Methodology written by Philip J. Rasch and published by Springer Science & Business Media. This book was released on 2012-12-09 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Earth's average temperature has risen by 1.4°F over the past century, and computer models project that it will rise much more over the next hundred years, with significant impacts on weather, climate, and human society. Many climate scientists attribute these increases to the build up of greenhouse gases produced by the burning of fossil fuels and to the anthropogenic production of short-lived climate pollutants. Climate Change Modeling Methodologies: Selected Entries from the Encyclopaedia of Sustainability Science and Technology provides readers with an introduction to the tools and analysis techniques used by climate change scientists to interpret the role of these forcing agents on climate. Readers will also gain a deeper understanding of the strengths and weaknesses of these models and how to test and assess them. The contributions include a glossary of key terms and a concise definition of the subject for each topic, as well as recommendations for sources of more detailed information.
Download or read book Mathematical and Physical Fundamentals of Climate Change written by Zhihua Zhang and published by Elsevier. This book was released on 2014-12-06 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical and Physical Fundamentals of Climate Change is the first book to provide an overview of the math and physics necessary for scientists to understand and apply atmospheric and oceanic models to climate research. The book begins with basic mathematics then leads on to specific applications in atmospheric and ocean dynamics, such as fluid dynamics, atmospheric dynamics, oceanic dynamics, and glaciers and sea level rise. Mathematical and Physical Fundamentals of Climate Change provides a solid foundation in math and physics with which to understand global warming, natural climate variations, and climate models. This book informs the future users of climate models and the decision-makers of tomorrow by providing the depth they need. Developed from a course that the authors teach at Beijing Normal University, the material has been extensively class-tested and contains online resources, such as presentation files, lecture notes, solutions to problems and MATLab codes. Includes MatLab and Fortran programs that allow readers to create their own models Provides case studies to show how the math is applied to climate research Online resources include presentation files, lecture notes, and solutions to problems in book for use in classroom or self-study
Download or read book Incorporation of Physical Hydrology in a Land surface Process Model for Climate Modeling written by Kevin Paul Czajkowski and published by . This book was released on 1995 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COMPUTATIONAL MODELS Volume II written by Shaidurov Vladimir Viktorovich and published by EOLSS Publications. This book was released on 2009-04-10 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Models is a component of Encyclopedia of Mathematical Sciences in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. Modern Computational Mathematics arises in a wide variety of fields, including business, economics, engineering, finance, medicine and science. The Theme on Computational Models provides the essential aspects of Computational Mathematics emphasizing Basic Methods for Solving Equations; Numerical Analysis and Methods for Ordinary Differential Equations; Numerical Methods and Algorithms; Computational Methods and Algorithms; Numerical Models and Simulation. These two volumes are aimed at those seeking in-depth of advanced knowledge: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs
Download or read book Advances in Land Remote Sensing written by Shunlin Liang and published by Springer Science & Business Media. This book was released on 2008-03-11 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: It collects the review papers of the 9th International Symposium on Physical Measurements and Signatures in Remote Sensing (ISPMSRS). It systematically summarizes the past achievements and identifies the frontier issues as the research agenda for the near future. It covers all aspects of land remote sensing, from sensor systems, physical modeling, inversion algorithms, to various applications.
